Add buffer position display and documentation improvements.

- Display buffer position prefix "[x/N]" in GUI and terminal renderers.
- Improve `kte` and `kge` man pages with frontend usage details and project homepage.
- Update README with GUI invocation instructions.
- Bump version to 1.0.0.

.idea/codeStyles/Project.xml

@@ -17,7 +17,6 @@
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/KEEP_BLANK_LINES_IN_DECLARATIONS/@EntryValue" value="2" type="int" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/KEEP_BLANK_LINES_IN_CODE/@EntryValue" value="2" type="int" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/KEEP_USER_LINEBREAKS/@EntryValue" value="true" type="bool" />
-      <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/INDENT_CASE_FROM_SWITCH/@EntryValue" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/INDENT_COMMENT/@EntryValue" value="true" type="bool" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/INT_ALIGN_EQ/@EntryValue" value="true" type="bool" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/SIMPLE_BLOCK_STYLE/@EntryValue" value="LINE_BREAK" type="string" />
@@ -115,33 +114,18 @@
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/TOPLEVEL_FUNCTION_DECLARATION_RETURN_TYPE_STYLE/@EntryValue" value="ON_SINGLE_LINE" type="string" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/FUNCTION_DECLARATION_RETURN_TYPE_STYLE/@EntryValue" value="ON_SINGLE_LINE" type="string" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=0B82708A1BA7774EB13D27F245698A56/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;1&quot; Title=&quot;Classes and structs&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;__interface&quot; /&gt;&lt;type Name=&quot;class&quot; /&gt;&lt;type Name=&quot;struct&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=0B82708A1BA7774EB13D27F245698A56/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=A7EBF16DA3BDCB42A0B710704BC8A053/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;3&quot; Title=&quot;Enums&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;enum&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=A7EBF16DA3BDCB42A0B710704BC8A053/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=0AFB7787612DF743B09AD9412E48D4CC/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;7&quot; Title=&quot;Local variables&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;local variable&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;aaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=0AFB7787612DF743B09AD9412E48D4CC/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=72514D5DF422D442B71A277F97B72887/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;8&quot; Title=&quot;Global variables&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;global variable&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AA_BB&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=72514D5DF422D442B71A277F97B72887/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=821F3C5CF47D5640AD3511BCBADE17C4/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;9&quot; Title=&quot;Lambdas&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;lambda&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=821F3C5CF47D5640AD3511BCBADE17C4/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=8F69F48E2532F54CBAA0039D4557825E/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;10&quot; Title=&quot;Global functions&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;global function&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=8F69F48E2532F54CBAA0039D4557825E/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=B6E900853D6D05429D8C57765B2E546A/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;11&quot; Title=&quot;Class and struct methods&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;member function&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=B6E900853D6D05429D8C57765B2E546A/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=B82A063F0DDD98498A70D8D7EBB97F8D/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;12&quot; Title=&quot;Class and struct fields&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;class field&quot; /&gt;&lt;type Name=&quot;struct field&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;_&quot; Style=&quot;aaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=B82A063F0DDD98498A70D8D7EBB97F8D/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=BBE8AA08E662BF409B2CB08EC597C493/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;13&quot; Title=&quot;Class and struct public fields&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;PUBLIC&quot;&gt;&lt;type Name=&quot;class field&quot; /&gt;&lt;type Name=&quot;struct field&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;aaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=BBE8AA08E662BF409B2CB08EC597C493/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=A4FAA2257682A94F8C2C93E123FAFC7A/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;19&quot; Title=&quot;Typedefs&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;Indeterminate&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;type alias&quot; /&gt;&lt;type Name=&quot;typedef&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=A4FAA2257682A94F8C2C93E123FAFC7A/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=BF0D1AE66D64FE4FAF613448A12051A0/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;17&quot; Title=&quot;Global constants&quot;&gt;&lt;Descriptor Static=&quot;Indeterminate&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;True&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;global variable&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=BF0D1AE66D64FE4FAF613448A12051A0/@EntryIndexRemoved" />
       <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=2B232F1067F0324F8FF4B9D63ACECDB2/@EntryIndexedValue" value="&lt;NamingElement Priority=&quot;16&quot; Title=&quot;Other constants&quot;&gt;&lt;Descriptor Static=&quot;True&quot; Constexpr=&quot;Indeterminate&quot; Const=&quot;True&quot; Volatile=&quot;Indeterminate&quot; Accessibility=&quot;NOT_APPLICABLE&quot;&gt;&lt;type Name=&quot;class field&quot; /&gt;&lt;type Name=&quot;local variable&quot; /&gt;&lt;type Name=&quot;struct field&quot; /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect=&quot;True&quot; WarnAboutPrefixesAndSuffixes=&quot;False&quot; Prefix=&quot;&quot; Suffix=&quot;&quot; Style=&quot;AaBb&quot; /&gt;&lt;/NamingElement&gt;" type="string" />
-      <option name="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=2B232F1067F0324F8FF4B9D63ACECDB2/@EntryIndexRemoved" />
-      <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/REMOVE_BLANK_LINES_NEAR_BRACES_IN_CODE/@EntryValue" />
       <option name="/Default/CodeStyle/CppIncludeDirective/SortIncludeDirectives/@EntryValue" value="true" type="bool" />
-      <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/USE_CONTINUOUS_LINE_INDENT_IN_METHOD_PARS/@EntryValue" />
-      <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/USE_CONTINUOUS_LINE_INDENT_IN_EXPRESSION_BRACES/@EntryValue" />
       <option name="/Default/CodeStyle/CodeFormatting/CppFormatting/INDENT_GOTO_LABELS/@EntryValue" value="false" type="bool" />
     </RiderCodeStyleSettings>
     <files>

.idea/workspace.xml

@@ -11,9 +11,9 @@
     <option name="/Default/Housekeeping/RefactoringsMru/RenameRefactoring/DoSearchForTextInStrings/@EntryValue" value="true" type="bool" />
     <option name="/Default/RiderDebugger/RiderRestoreDecompile/RestoreDecompileSetting/@EntryValue" value="false" type="bool" />
   </component>
-  <component name="CMakePresetLoader"><![CDATA[{
+  <component name="CMakePresetLoader">{
-  "useNewFormat": true
+  &quot;useNewFormat&quot;: true
-}]]></component>
+}</component>
   <component name="CMakeProjectFlavorService">
     <option name="flavorId" value="CMakePlainProjectFlavor" />
   </component>
@@ -33,9 +33,10 @@
     </configurations>
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="e1fe3ab0-3650-4fca-8664-a247d5dfa457" name="Changes" comment="Add GUI initialization updates and improve navigation commands.&#10;&#10;- Implement terminal detachment for GUI mode to enable terminal closure post-launch.&#10;- Add `+N` support for opening files at specific line numbers and refine cursor positioning.&#10;- Introduce `JumpToLine` command for direct navigation by line number.&#10;- Enhance mouse wheel handling for line-wise scrolling.">
+    <list default="true" id="e1fe3ab0-3650-4fca-8664-a247d5dfa457" name="Changes" comment="Introduce file picker and GUI configuration with enhancements.&#10;&#10;- Add visual file picker for GUI with toggle support.&#10;- Introduce `GUIConfig` class for loading GUI settings from configuration file.&#10;- Refactor window initialization to support dynamic sizing based on configuration.&#10;- Add macOS-specific handling for fullscreen behavior.&#10;- Improve header inclusion order and minor code cleanup.">
-      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/CMakeLists.txt" beforeDir="false" afterPath="$PROJECT_DIR$/CMakeLists.txt" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/docs/kte.1" beforeDir="false" afterPath="$PROJECT_DIR$/docs/kte.1" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -56,15 +57,6 @@
   <component name="HighlightingSettingsPerFile">
     <setting file="mock:///AIAssistantSnippet.." root0="SKIP_HIGHLIGHTING" />
     <setting file="mock:///AIAssistantSnippet.." root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///AIAssistantSnippet.." root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
-    <setting file="mock:///dummy.cpp" root0="SKIP_HIGHLIGHTING" />
   </component>
   <component name="OptimizeOnSaveOptions">
     <option name="myRunOnSave" value="true" />
@@ -75,9 +67,9 @@
     <option name="minorVersion" value="2.5" />
     <option name="productBranch" value="Classic" />
   </component>
-  <component name="ProjectColorInfo"><![CDATA[{
+  <component name="ProjectColorInfo">{
-  "associatedIndex": 3
+  &quot;associatedIndex&quot;: 3
-}]]></component>
+}</component>
   <component name="ProjectId" id="36AlI8oyQOzOwSuZg6WxXf5LbHb" />
   <component name="ProjectLevelVcsManager">
     <OptionsSetting value="false" id="Update" />
@@ -88,51 +80,52 @@
     <option name="sortByType" value="true" />
     <option name="sortKey" value="BY_TYPE" />
   </component>
-  <component name="PropertiesComponent"><![CDATA[{
+  <component name="PropertiesComponent">{
-  "keyToString": {
+  &quot;keyToString&quot;: {
-    "CMake Application.kge.executor": "Run",
+    &quot;CMake Application.kge.executor&quot;: &quot;Run&quot;,
-    "CMake Application.test_example.executor": "Run",
+    &quot;CMake Application.test_example.executor&quot;: &quot;Run&quot;,
-    "CMake Application.test_undo.executor": "Run",
+    &quot;CMake Application.test_undo.executor&quot;: &quot;Run&quot;,
-    "ModuleVcsDetector.initialDetectionPerformed": "true",
+    &quot;ModuleVcsDetector.initialDetectionPerformed&quot;: &quot;true&quot;,
-    "NIXITCH_NIXPKGS_CONFIG": "",
+    &quot;NIXITCH_NIXPKGS_CONFIG&quot;: &quot;&quot;,
-    "NIXITCH_NIX_CONF_DIR": "",
+    &quot;NIXITCH_NIX_CONF_DIR&quot;: &quot;&quot;,
-    "NIXITCH_NIX_OTHER_STORES": "",
+    &quot;NIXITCH_NIX_OTHER_STORES&quot;: &quot;&quot;,
-    "NIXITCH_NIX_PATH": "",
+    &quot;NIXITCH_NIX_PATH&quot;: &quot;&quot;,
-    "NIXITCH_NIX_PROFILES": "",
+    &quot;NIXITCH_NIX_PROFILES&quot;: &quot;&quot;,
-    "NIXITCH_NIX_REMOTE": "",
+    &quot;NIXITCH_NIX_REMOTE&quot;: &quot;&quot;,
-    "NIXITCH_NIX_USER_PROFILE_DIR": "",
+    &quot;NIXITCH_NIX_USER_PROFILE_DIR&quot;: &quot;&quot;,
-    "RunOnceActivity.RadMigrateCodeStyle": "true",
+    &quot;RunOnceActivity.RadMigrateCodeStyle&quot;: &quot;true&quot;,
-    "RunOnceActivity.ShowReadmeOnStart": "true",
+    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
-    "RunOnceActivity.cidr.known.project.marker": "true",
+    &quot;RunOnceActivity.cidr.known.project.marker&quot;: &quot;true&quot;,
-    "RunOnceActivity.readMode.enableVisualFormatting": "true",
+    &quot;RunOnceActivity.git.unshallow&quot;: &quot;true&quot;,
-    "RunOnceActivity.west.config.association.type.startup.service": "true",
+    &quot;RunOnceActivity.readMode.enableVisualFormatting&quot;: &quot;true&quot;,
-    "cf.first.check.clang-format": "false",
+    &quot;RunOnceActivity.west.config.association.type.startup.service&quot;: &quot;true&quot;,
-    "cidr.known.project.marker": "true",
+    &quot;cf.first.check.clang-format&quot;: &quot;false&quot;,
-    "code.cleanup.on.save": "true",
+    &quot;cidr.known.project.marker&quot;: &quot;true&quot;,
-    "com.intellij.ml.llm.matterhorn.ej.ui.settings.DefaultModelSelectionForGA.v1": "true",
+    &quot;code.cleanup.on.save&quot;: &quot;true&quot;,
-    "git-widget-placeholder": "master",
+    &quot;com.intellij.ml.llm.matterhorn.ej.ui.settings.DefaultModelSelectionForGA.v1&quot;: &quot;true&quot;,
-    "junie.onboarding.icon.badge.shown": "true",
+    &quot;git-widget-placeholder&quot;: &quot;master&quot;,
-    "node.js.detected.package.eslint": "true",
+    &quot;junie.onboarding.icon.badge.shown&quot;: &quot;true&quot;,
-    "node.js.detected.package.tslint": "true",
+    &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
-    "node.js.selected.package.eslint": "(autodetect)",
+    &quot;node.js.detected.package.tslint&quot;: &quot;true&quot;,
-    "node.js.selected.package.tslint": "(autodetect)",
+    &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
-    "nodejs_package_manager_path": "npm",
+    &quot;node.js.selected.package.tslint&quot;: &quot;(autodetect)&quot;,
-    "onboarding.tips.debug.path": "/Users/kyle/src/kte/main.cpp",
+    &quot;nodejs_package_manager_path&quot;: &quot;npm&quot;,
-    "rearrange.code.on.save": "true",
+    &quot;onboarding.tips.debug.path&quot;: &quot;/Users/kyle/src/kte/main.cpp&quot;,
-    "settings.editor.selected.configurable": "junie.application.models",
+    &quot;rearrange.code.on.save&quot;: &quot;true&quot;,
-    "to.speed.mode.migration.done": "true",
+    &quot;settings.editor.selected.configurable&quot;: &quot;editor.preferences.fonts.default&quot;,
-    "vue.rearranger.settings.migration": "true"
+    &quot;to.speed.mode.migration.done&quot;: &quot;true&quot;,
+    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
   }
-}]]></component>
+}</component>
   <component name="RecentsManager">
     <key name="MoveFile.RECENT_KEYS">
       <recent name="$PROJECT_DIR$/docs" />
     </key>
   </component>
   <component name="RunManager" selected="CMake Application.kge">
-    <configuration default="true" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true">
+    <configuration default="true" type="CLionExternalRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true">
       <method v="2">
-        <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
+        <option name="CLION.EXTERNAL.BUILD" enabled="true" />
       </method>
     </configuration>
     <configuration name="imgui" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="kte" TARGET_NAME="imgui" CONFIG_NAME="Debug">
@@ -140,7 +133,7 @@
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
     </configuration>
-    <configuration name="kge" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="kte" TARGET_NAME="kge" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="kte" RUN_TARGET_NAME="kge">
+    <configuration name="kge" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" WORKING_DIR="file://$PROJECT_DIR$" PASS_PARENT_ENVS_2="true" PROJECT_NAME="kte" TARGET_NAME="kge" CONFIG_NAME="Debug" RUN_TARGET_PROJECT_NAME="kte" RUN_TARGET_NAME="kge">
       <method v="2">
         <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" enabled="true" />
       </method>
@@ -164,6 +157,14 @@
       <option name="presentableId" value="Default" />
       <updated>1764457173148</updated>
       <workItem from="1764457174208" duration="46950000" />
+      <workItem from="1764538560497" duration="215000" />
+      <workItem from="1764539255906" duration="196000" />
+      <workItem from="1764539459951" duration="64000" />
+      <workItem from="1764539535105" duration="10000" />
+      <workItem from="1764539556448" duration="156000" />
+      <workItem from="1764539725338" duration="1075000" />
+      <workItem from="1764542392763" duration="3512000" />
+      <workItem from="1764548345516" duration="8203000" />
     </task>
     <task id="LOCAL-00001" summary="Add undo/redo infrastructure and buffer management additions.">
       <option name="closed" value="true" />
@@ -237,7 +238,31 @@
       <option name="project" value="LOCAL" />
       <updated>1764505723411</updated>
     </task>
-    <option name="localTasksCounter" value="10" />
+    <task id="LOCAL-00010" summary="Refactor code for consistency and enhanced functionality.&#10;&#10;- Normalize path handling for buffer operations, supporting tilde expansion and absolute paths.&#10;- Introduce `DisplayNameFor` to uniquely resolve buffer display names, minimizing filename clashes.&#10;- Add new commands: `ShowWorkingDirectory` and `ChangeWorkingDirectory`.&#10;- Refine keybindings and enhance existing commands for improved command flow.&#10;- Adjust GUI and terminal renderers to display total line counts alongside filenames.&#10;- Update coding style to align with project guidelines.">
+      <option name="closed" value="true" />
+      <created>1764550164829</created>
+      <option name="number" value="00010" />
+      <option name="presentableId" value="LOCAL-00010" />
+      <option name="project" value="LOCAL" />
+      <updated>1764550164829</updated>
+    </task>
+    <task id="LOCAL-00011" summary="Add horizontal scrolling support and refactor mouse click handling in GUI.&#10;&#10;- Introduce horizontal scrolling with column offset synchronization in GUI.&#10;- Refactor mouse click handling for improved accuracy and viewport alignment.&#10;- Enhance tab expansion and cursor rendering logic for better user experience.&#10;- Replace redundant variable declarations in `Buffer` for cleaner code.">
+      <option name="closed" value="true" />
+      <created>1764551986561</created>
+      <option name="number" value="00011" />
+      <option name="presentableId" value="LOCAL-00011" />
+      <option name="project" value="LOCAL" />
+      <updated>1764551986561</updated>
+    </task>
+    <task id="LOCAL-00012" summary="Introduce file picker and GUI configuration with enhancements.&#10;&#10;- Add visual file picker for GUI with toggle support.&#10;- Introduce `GUIConfig` class for loading GUI settings from configuration file.&#10;- Refactor window initialization to support dynamic sizing based on configuration.&#10;- Add macOS-specific handling for fullscreen behavior.&#10;- Improve header inclusion order and minor code cleanup.">
+      <option name="closed" value="true" />
+      <created>1764556512864</created>
+      <option name="number" value="00012" />
+      <option name="presentableId" value="LOCAL-00012" />
+      <option name="project" value="LOCAL" />
+      <updated>1764556512864</updated>
+    </task>
+    <option name="localTasksCounter" value="13" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -260,7 +285,10 @@
     <MESSAGE value="Remove `packaging.cmake`, deprecate `test_undo` setup, and add new testing infrastructure.&#10;&#10;- Delete `packaging.cmake` to streamline build system.&#10;- Deprecate `test_undo` in CMake setup; condition builds on `BUILD_TESTS`.&#10;- Introduce `TestFrontend`, `TestRenderer`, and `TestInputHandler` for structured testing.&#10;- Update `GUIInputHandler` and `Command` for enhanced buffer save handling and overwrite confirmation.&#10;- Enhance kill ring operations and new prompt workflows in `Editor`." />
     <MESSAGE value="Add man pages for `kge` and `kte` with installation targets in CMake.&#10;&#10;- Introduce `docs/kge.1` and `docs/kte.1` man pages covering usage, options, keybindings, and examples.&#10;- Update `CMakeLists.txt` to install man pages under `${CMAKE_INSTALL_MANDIR}/man1`.&#10;- Ensure `kge` man page installation is conditional on GUI being built." />
     <MESSAGE value="Add GUI initialization updates and improve navigation commands.&#10;&#10;- Implement terminal detachment for GUI mode to enable terminal closure post-launch.&#10;- Add `+N` support for opening files at specific line numbers and refine cursor positioning.&#10;- Introduce `JumpToLine` command for direct navigation by line number.&#10;- Enhance mouse wheel handling for line-wise scrolling." />
-    <option name="LAST_COMMIT_MESSAGE" value="Add GUI initialization updates and improve navigation commands.&#10;&#10;- Implement terminal detachment for GUI mode to enable terminal closure post-launch.&#10;- Add `+N` support for opening files at specific line numbers and refine cursor positioning.&#10;- Introduce `JumpToLine` command for direct navigation by line number.&#10;- Enhance mouse wheel handling for line-wise scrolling." />
+    <MESSAGE value="Refactor code for consistency and enhanced functionality.&#10;&#10;- Normalize path handling for buffer operations, supporting tilde expansion and absolute paths.&#10;- Introduce `DisplayNameFor` to uniquely resolve buffer display names, minimizing filename clashes.&#10;- Add new commands: `ShowWorkingDirectory` and `ChangeWorkingDirectory`.&#10;- Refine keybindings and enhance existing commands for improved command flow.&#10;- Adjust GUI and terminal renderers to display total line counts alongside filenames.&#10;- Update coding style to align with project guidelines." />
+    <MESSAGE value="Add horizontal scrolling support and refactor mouse click handling in GUI.&#10;&#10;- Introduce horizontal scrolling with column offset synchronization in GUI.&#10;- Refactor mouse click handling for improved accuracy and viewport alignment.&#10;- Enhance tab expansion and cursor rendering logic for better user experience.&#10;- Replace redundant variable declarations in `Buffer` for cleaner code." />
+    <MESSAGE value="Introduce file picker and GUI configuration with enhancements.&#10;&#10;- Add visual file picker for GUI with toggle support.&#10;- Introduce `GUIConfig` class for loading GUI settings from configuration file.&#10;- Refactor window initialization to support dynamic sizing based on configuration.&#10;- Add macOS-specific handling for fullscreen behavior.&#10;- Improve header inclusion order and minor code cleanup." />
+    <option name="LAST_COMMIT_MESSAGE" value="Introduce file picker and GUI configuration with enhancements.&#10;&#10;- Add visual file picker for GUI with toggle support.&#10;- Introduce `GUIConfig` class for loading GUI settings from configuration file.&#10;- Refactor window initialization to support dynamic sizing based on configuration.&#10;- Add macOS-specific handling for fullscreen behavior.&#10;- Improve header inclusion order and minor code cleanup." />
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />

.junie/guidelines.md

@@ -1,39 +1,19 @@
 # Project Guidelines
 
 kte is Kyle's Text Editor — a simple, fast text editor written in C++17. It
-replaces the earlier C implementation, ke (see the ke manual in `ke.md`). The
+replaces the earlier C implementation, ke (see the ke manual in `docs/ke.md`). The
 design draws inspiration from Antirez' kilo, with keybindings rooted in the
 WordStar/VDE family and emacs. The spiritual parent is `mg(1)`.
 
 These guidelines summarize the goals, interfaces, key operations, and current
 development practices for kte.
 
-Style note: all code should be formatted with the current CLion C++ style.
-
 ## Goals
 
 - Keep the core small, fast, and understandable.
-- Provide an ncurses-based terminal-first editing experience, with an optional ImGui GUI.
+- Provide an ncurses-based terminal-first editing experience, with an additional ImGui GUI.
 - Preserve familiar keybindings from ke while modernizing the internals.
-- Favor simple data structures (e.g., gap buffer) and incremental evolution.
+- Favor simple data structures (e.g., piece table) and incremental evolution.
-
-## Interfaces
-
-- Command-line interface: the primary interface today.
-- GUI: planned ImGui-based interface.
-
-## Build and Run
-
-Prerequisites: a C++17 compiler, CMake, and ncurses development headers/libs.
-
-- macOS (Homebrew): `brew install ncurses`
-- Debian/Ubuntu: `sudo apt-get install libncurses5-dev libncursesw5-dev`
-
-- Configure and build (example):
-    - `cmake -S . -B cmake-build-debug -DCMAKE_BUILD_TYPE=Debug`
-    - `cmake --build cmake-build-debug`
-- Run:
-    - `./cmake-build-debug/kte [files]`
 
 Project entry point: `main.cpp`
 
@@ -52,31 +32,12 @@ Project entry point: `main.cpp`
 
 ## Keybindings (inherited from ke)
 
-kte aims to maintain ke’s command model while internals evolve. See `ke.md` for
+The file `docs/ke.md` contains the canonical reference for keybindings.
-the full reference. Highlights:
-
-- K-command prefix: `C-k` enters k-command mode; exit with `ESC` or `C-g`.
-- Save/Exit: `C-k s` (save), `C-k x` or `C-k C-x` (save and exit), `C-k q` (quit
-  with confirm), `C-k C-q` (quit immediately).
-- Editing: `C-k d` (kill to EOL), `C-k C-d` (kill line), `C-k BACKSPACE` (kill
-  to BOL), `C-w` (kill region), `C-y` (yank), `C-u` (universal argument).
-- Navigation/Search: `C-s` (incremental find), `C-r` (regex search), `ESC f/b`
-  (word next/prev), `ESC BACKSPACE` (delete previous word).
-- Buffers/Files: `C-k e` (open), `C-k b`/`C-k p` (switch), `C-k c` (close),
-  `C-k C-r` (reload).
-- Misc: `C-l` (refresh), `C-g` (cancel), `C-k m` (run make), `C-k g` (goto line).
-
-Known behavior from ke retained for now:
-
-- Incremental search navigates results with arrow keys; search restarts from
-  the top on each invocation (known bug to be revisited).
 
 ## Contributing/Development Notes
 
 - C++ standard: C++17.
-- Style: match existing file formatting and minimal-comment style.
+- Keep dependencies minimal.
-- Keep dependencies minimal; ImGui integration will be isolated behind a GUI
-  module.
 - Prefer small, focused changes that preserve ke’s UX unless explicitly changing
   behavior.
 

Buffer.cc

@@ -1,10 +1,11 @@
-#include "Buffer.h"
-#include "UndoSystem.h"
-#include "UndoTree.h"
-
 #include <fstream>
 #include <sstream>
 #include <filesystem>
+#include <cstdlib>
+
+#include "Buffer.h"
+#include "UndoSystem.h"
+#include "UndoTree.h"
 
 
 Buffer::Buffer()
@@ -129,12 +130,36 @@ Buffer::operator=(Buffer &&other) noexcept
 bool
 Buffer::OpenFromFile(const std::string &path, std::string &err)
 {
+	auto normalize_path = [](const std::string &in) -> std::string {
+		std::string expanded = in;
+		// Expand leading '~' to HOME
+		if (!expanded.empty() && expanded[0] == '~') {
+			const char *home = std::getenv("HOME");
+			if (home && expanded.size() >= 2 && (expanded[1] == '/' || expanded[1] == '\\')) {
+				expanded = std::string(home) + expanded.substr(1);
+			} else if (home && expanded.size() == 1) {
+				expanded = std::string(home);
+			}
+		}
+		try {
+			std::filesystem::path p(expanded);
+			if (std::filesystem::exists(p)) {
+				return std::filesystem::canonical(p).string();
+			}
+			return std::filesystem::absolute(p).string();
+		} catch (...) {
+			// On any error, fall back to input
+			return expanded;
+		}
+	};
+
+	const std::string norm = normalize_path(path);
 	// If the file doesn't exist, initialize an empty, non-file-backed buffer
 	// with the provided filename. Do not touch the filesystem until Save/SaveAs.
-	if (!std::filesystem::exists(path)) {
+	if (!std::filesystem::exists(norm)) {
 		rows_.clear();
 		nrows_          = 0;
-		filename_       = path;
+		filename_       = norm;
 		is_file_backed_ = false;
 		dirty_          = false;
 
@@ -147,9 +172,9 @@ Buffer::OpenFromFile(const std::string &path, std::string &err)
 		return true;
 	}
 
-	std::ifstream in(path, std::ios::in | std::ios::binary);
+	std::ifstream in(norm, std::ios::in | std::ios::binary);
 	if (!in) {
-		err = "Failed to open file: " + path;
+		err = "Failed to open file: " + norm;
 		return false;
 	}
 
@@ -194,7 +219,7 @@ Buffer::OpenFromFile(const std::string &path, std::string &err)
 	}
 
 	nrows_          = rows_.size();
-	filename_       = path;
+	filename_       = norm;
 	is_file_backed_ = true;
 	dirty_          = false;
 
@@ -250,10 +275,29 @@ Buffer::Save(std::string &err) const
 bool
 Buffer::SaveAs(const std::string &path, std::string &err)
 {
+	// Normalize output path first
+	std::string out_path;
+	try {
+		std::filesystem::path p(path);
+		// Do a light expansion of '~'
+		std::string expanded = path;
+		if (!expanded.empty() && expanded[0] == '~') {
+			const char *home = std::getenv("HOME");
+			if (home && expanded.size() >= 2 && (expanded[1] == '/' || expanded[1] == '\\'))
+				expanded = std::string(home) + expanded.substr(1);
+			else if (home && expanded.size() == 1)
+				expanded = std::string(home);
+		}
+		std::filesystem::path ep(expanded);
+		out_path = std::filesystem::absolute(ep).string();
+	} catch (...) {
+		out_path = path;
+	}
+
 	// Write to the given path
-	std::ofstream out(path, std::ios::out | std::ios::binary | std::ios::trunc);
+	std::ofstream out(out_path, std::ios::out | std::ios::binary | std::ios::trunc);
 	if (!out) {
-		err = "Failed to open for write: " + path;
+		err = "Failed to open for write: " + out_path;
 		return false;
 	}
 	for (std::size_t i = 0; i < rows_.size(); ++i) {
@@ -270,7 +314,7 @@ Buffer::SaveAs(const std::string &path, std::string &err)
 		return false;
 	}
 
-	filename_       = path;
+	filename_       = out_path;
 	is_file_backed_ = true;
 	dirty_          = false;
 	return true;
@@ -303,8 +347,8 @@ Buffer::insert_text(int row, int col, std::string_view text)
 	if (static_cast<std::size_t>(row) >= rows_.size())
 		rows_.emplace_back("");
 
-	std::size_t y = static_cast<std::size_t>(row);
+	auto y = static_cast<std::size_t>(row);
-	std::size_t x = static_cast<std::size_t>(col);
+	auto x = static_cast<std::size_t>(col);
 	if (x > rows_[y].size())
 		x = rows_[y].size();
 
@@ -340,13 +384,13 @@ Buffer::delete_text(int row, int col, std::size_t len)
 		row = 0;
 	if (static_cast<std::size_t>(row) >= rows_.size())
 		return;
-	std::size_t y = static_cast<std::size_t>(row);
+	const auto y = static_cast<std::size_t>(row);
-	std::size_t x = std::min<std::size_t>(static_cast<std::size_t>(col), rows_[y].size());
+	const auto x = std::min<std::size_t>(static_cast<std::size_t>(col), rows_[y].size());
 
 	std::size_t remaining = len;
 	while (remaining > 0 && y < rows_.size()) {
-		auto &line          = rows_[y];
+		auto &line                = rows_[y];
-		std::size_t in_line = std::min<std::size_t>(remaining, line.size() - std::min(x, line.size()));
+		const std::size_t in_line = std::min<std::size_t>(remaining, line.size() - std::min(x, line.size()));
 		if (x < line.size() && in_line > 0) {
 			line.erase(x, in_line);
 			remaining -= in_line;
@@ -370,15 +414,18 @@ Buffer::delete_text(int row, int col, std::size_t len)
 
 
 void
-Buffer::split_line(int row, int col)
+Buffer::split_line(int row, const int col)
 {
-	if (row < 0)
+	if (row < 0) {
 		row = 0;
-	if (static_cast<std::size_t>(row) >= rows_.size())
+	}
+
+	if (static_cast<std::size_t>(row) >= rows_.size()) {
 		rows_.resize(static_cast<std::size_t>(row) + 1);
-	std::size_t y    = static_cast<std::size_t>(row);
+	}
-	std::size_t x    = std::min<std::size_t>(static_cast<std::size_t>(col), rows_[y].size());
+	const auto y    = static_cast<std::size_t>(row);
-	std::string tail = rows_[y].substr(x);
+	const auto x    = std::min<std::size_t>(static_cast<std::size_t>(col), rows_[y].size());
+	const auto tail = rows_[y].substr(x);
 	rows_[y].erase(x);
 	rows_.insert(rows_.begin() + static_cast<std::ptrdiff_t>(y + 1), tail);
 }
@@ -387,24 +434,28 @@ Buffer::split_line(int row, int col)
 void
 Buffer::join_lines(int row)
 {
-	if (row < 0)
+	if (row < 0) {
 		row = 0;
-	std::size_t y = static_cast<std::size_t>(row);
+	}
-	if (y + 1 >= rows_.size())
+
+	const auto y = static_cast<std::size_t>(row);
+	if (y + 1 >= rows_.size()) {
 		return;
+	}
+
 	rows_[y] += rows_[y + 1];
 	rows_.erase(rows_.begin() + static_cast<std::ptrdiff_t>(y + 1));
 }
 
 
 void
-Buffer::insert_row(int row, std::string_view text)
+Buffer::insert_row(int row, const std::string_view text)
 {
 	if (row < 0)
 		row = 0;
 	if (static_cast<std::size_t>(row) > rows_.size())
 		row = static_cast<int>(rows_.size());
-	rows_.insert(rows_.begin() + static_cast<std::ptrdiff_t>(row), std::string(text));
+	rows_.insert(rows_.begin() + row, std::string(text));
 }
 
 
@@ -415,7 +466,7 @@ Buffer::delete_row(int row)
 		row = 0;
 	if (static_cast<std::size_t>(row) >= rows_.size())
 		return;
-	rows_.erase(rows_.begin() + static_cast<std::ptrdiff_t>(row));
+	rows_.erase(rows_.begin() + row);
 }
 
 

Buffer.h

@@ -12,6 +12,7 @@
 #include "AppendBuffer.h"
 #include "UndoSystem.h"
 
+
 class Buffer {
 public:
 	Buffer();

CMakeLists.txt

@@ -4,13 +4,13 @@ project(kte)
 include(GNUInstallDirs)
 
 set(CMAKE_CXX_STANDARD 17)
-set(KTE_VERSION "0.9.0")
+set(KTE_VERSION "1.0.0")
 
 # Default to terminal-only build to avoid SDL/OpenGL dependency by default.
 # Enable with -DBUILD_GUI=ON when SDL2/OpenGL/Freetype are available.
 set(BUILD_GUI OFF CACHE BOOL "Enable building the graphical version.")
 set(BUILD_TESTS OFF CACHE BOOL "Enable building test programs.")
-option(KTE_USE_PIECE_TABLE "Use PieceTable instead of GapBuffer implementation" OFF)
+option(KTE_USE_PIECE_TABLE "Use PieceTable instead of GapBuffer implementation" ON)
 set(KTE_FONT_SIZE "18.0" CACHE STRING "Default font size for GUI")
 
 if (CMAKE_HOST_UNIX)
@@ -44,6 +44,8 @@ if (${BUILD_GUI})
 endif ()
 
 # NCurses for terminal mode
+set(CURSES_NEED_NCURSES)
+set(CURSES_NEED_WIDE)
 find_package(Curses REQUIRED)
 include_directories(${CURSES_INCLUDE_DIR})
 
@@ -126,6 +128,8 @@ endif ()
 if (${BUILD_GUI})
     target_sources(kte PRIVATE
             Font.h
+            GUIConfig.cc
+            GUIConfig.h
             GUIRenderer.cc
             GUIRenderer.h
             GUIInputHandler.cc
@@ -140,6 +144,8 @@ if (${BUILD_GUI})
             main.cc
             ${COMMON_SOURCES}
             ${COMMON_HEADERS}
+            GUIConfig.cc
+            GUIConfig.h
             GUIRenderer.cc
             GUIRenderer.h
             GUIInputHandler.cc
@@ -151,6 +157,15 @@ if (${BUILD_GUI})
 
     # On macOS, build kge as a proper .app bundle
     if (APPLE)
+        # Define the icon file
+        set(MACOSX_BUNDLE_ICON_FILE kge.icns)
+        set(kge_ICON "${CMAKE_CURRENT_SOURCE_DIR}/${MACOSX_BUNDLE_ICON_FILE}")
+
+        # Add icon to the target sources and mark it as a resource
+        target_sources(kge PRIVATE ${kge_ICON})
+        set_source_files_properties(${kge_ICON} PROPERTIES
+                MACOSX_PACKAGE_LOCATION Resources)
+
         # Configure Info.plist with version and identifiers
         set(KGE_BUNDLE_ID "dev.wntrmute.kge")
         configure_file(
@@ -162,6 +177,7 @@ if (${BUILD_GUI})
                 MACOSX_BUNDLE TRUE
                 MACOSX_BUNDLE_GUI_IDENTIFIER ${KGE_BUNDLE_ID}
                 MACOSX_BUNDLE_BUNDLE_NAME "kge"
+                MACOSX_BUNDLE_ICON_FILE ${MACOSX_BUNDLE_ICON_FILE}
                 MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_BINARY_DIR}/kge-Info.plist")
 
         install(TARGETS kge

Command.cc

@@ -1,18 +1,18 @@
 #include <algorithm>
 #include <filesystem>
+#include <cstdlib>
 
 #include "Command.h"
 #include "Editor.h"
 #include "Buffer.h"
 #include "UndoSystem.h"
-// Note: Command layer must remain UI-agnostic. Do not include frontend/IO headers here.
 
 
 // Keep buffer viewport offsets so that the cursor stays within the visible
 // window based on the editor's current dimensions. The bottom row is reserved
 // for the status line.
 static std::size_t
-compute_render_x(const std::string &line, std::size_t curx, std::size_t tabw)
+compute_render_x(const std::string &line, const std::size_t curx, const std::size_t tabw)
 {
 	std::size_t rx = 0;
 	for (std::size_t i = 0; i < curx && i < line.size(); ++i) {
@@ -453,6 +453,36 @@ cmd_save(CommandContext &ctx)
 }
 
 
+// --- Working directory commands ---
+static bool
+cmd_show_working_directory(CommandContext &ctx)
+{
+	try {
+		std::filesystem::path cwd = std::filesystem::current_path();
+		ctx.editor.SetStatus(std::string("cwd: ") + cwd.string());
+		return true;
+	} catch (const std::exception &e) {
+		ctx.editor.SetStatus(std::string("cwd: <error> ") + e.what());
+		return false;
+	}
+}
+
+
+static bool
+cmd_change_working_directory_start(CommandContext &ctx)
+{
+	std::string initial;
+	try {
+		initial = std::filesystem::current_path().string() + "/";
+	} catch (...) {
+		initial.clear();
+	}
+	ctx.editor.StartPrompt(Editor::PromptKind::Chdir, "chdir", initial);
+	ctx.editor.SetStatus(std::string("chdir: ") + ctx.editor.PromptText());
+	return true;
+}
+
+
 static bool
 cmd_save_as(CommandContext &ctx)
 {
@@ -646,6 +676,30 @@ cmd_open_file_start(CommandContext &ctx)
 }
 
 
+// GUI: toggle visual file picker (no-op in terminal; renderer will consume flag)
+static bool
+cmd_visual_file_picker_toggle(CommandContext &ctx)
+{
+	// Toggle visibility
+	bool show = !ctx.editor.FilePickerVisible();
+	ctx.editor.SetFilePickerVisible(show);
+	if (show) {
+		// Initialize directory to current working directory if empty
+		if (ctx.editor.FilePickerDir().empty()) {
+			try {
+				ctx.editor.SetFilePickerDir(std::filesystem::current_path().string());
+			} catch (...) {
+				ctx.editor.SetFilePickerDir(".");
+			}
+		}
+		ctx.editor.SetStatus("Open File (visual)");
+	} else {
+		ctx.editor.SetStatus("Closed file picker");
+	}
+	return true;
+}
+
+
 static bool
 cmd_jump_to_line_start(CommandContext &ctx)
 {
@@ -762,43 +816,141 @@ cmd_insert_text(CommandContext &ctx)
 	}
 	// If a prompt is active, edit prompt text
 	if (ctx.editor.PromptActive()) {
-		// Special-case: buffer switch prompt supports Tab-completion
+		// Special-case: Tab-completion for prompts
-		if (ctx.editor.CurrentPromptKind() == Editor::PromptKind::BufferSwitch && ctx.arg == "\t") {
+		if (ctx.arg == "\t") {
-			// Complete against buffer names (path and basename)
+			auto kind = ctx.editor.CurrentPromptKind();
-			const std::string prefix = ctx.editor.PromptText();
+			// Buffer switch prompt supports Tab-completion on buffer names
-			std::vector<std::pair<std::string, std::size_t> > cands; // name, index
+			if (kind == Editor::PromptKind::BufferSwitch) {
-			const auto &bs = ctx.editor.Buffers();
+				// Complete against buffer names (path and basename)
-			for (std::size_t i = 0; i < bs.size(); ++i) {
+				const std::string prefix = ctx.editor.PromptText();
-				std::string full = buffer_display_name(bs[i]);
+				std::vector<std::pair<std::string, std::size_t> > cands; // name, index
-				std::string base = buffer_basename(bs[i]);
+				const auto &bs = ctx.editor.Buffers();
-				if (full.rfind(prefix, 0) == 0) {
+				for (std::size_t i = 0; i < bs.size(); ++i) {
-					cands.emplace_back(full, i);
+					std::string full = buffer_display_name(bs[i]);
+					std::string base = buffer_basename(bs[i]);
+					if (full.rfind(prefix, 0) == 0) {
+						cands.emplace_back(full, i);
+					}
+					if (base.rfind(prefix, 0) == 0 && base != full) {
+						cands.emplace_back(base, i);
+					}
 				}
-				if (base.rfind(prefix, 0) == 0 && base != full) {
+				if (cands.empty()) {
-					cands.emplace_back(base, i);
+					// no change
+				} else if (cands.size() == 1) {
+					ctx.editor.SetPromptText(cands[0].first);
+				} else {
+					// extend to longest common prefix
+					std::string lcp = cands[0].first;
+					for (std::size_t i = 1; i < cands.size(); ++i) {
+						const std::string &s = cands[i].first;
+						std::size_t j        = 0;
+						while (j < lcp.size() && j < s.size() && lcp[j] == s[j])
+							++j;
+						lcp.resize(j);
+						if (lcp.empty())
+							break;
+					}
+					if (!lcp.empty() && lcp != ctx.editor.PromptText())
+						ctx.editor.SetPromptText(lcp);
 				}
+				ctx.editor.SetStatus(ctx.editor.PromptLabel() + ": " + ctx.editor.PromptText());
+				return true;
 			}
-			if (cands.empty()) {
+
-				// no change
+			// File path completion for OpenFile/SaveAs/Chdir
-			} else if (cands.size() == 1) {
+			if (kind == Editor::PromptKind::OpenFile || kind == Editor::PromptKind::SaveAs
-				ctx.editor.SetPromptText(cands[0].first);
+			    || kind == Editor::PromptKind::Chdir) {
-			} else {
+				auto expand_user_path = [](const std::string &in) -> std::string {
-				// extend to longest common prefix
+					if (!in.empty() && in[0] == '~') {
-				std::string lcp = cands[0].first;
+						const char *home = std::getenv("HOME");
-				for (std::size_t i = 1; i < cands.size(); ++i) {
+						if (home && in.size() == 1)
-					const std::string &s = cands[i].first;
+							return std::string(home);
-					std::size_t j        = 0;
+						if (home && (in.size() > 1) && (in[1] == '/' || in[1] == '\\')) {
-					while (j < lcp.size() && j < s.size() && lcp[j] == s[j])
+							std::string rest = in.substr(1); // keep leading slash
-						++j;
+							return std::string(home) + rest;
-					lcp.resize(j);
+						}
-					if (lcp.empty())
+					}
-						break;
+					return in;
+				};
+
+				std::string text = ctx.editor.PromptText();
+				// Build a path and split dir + base prefix
+				std::string expanded = expand_user_path(text);
+				std::filesystem::path p(expanded);
+				std::filesystem::path dir;
+				std::string base;
+				if (expanded.empty()) {
+					dir = std::filesystem::current_path();
+					base.clear();
+				} else if (std::filesystem::is_directory(p)) {
+					dir = p;
+					base.clear();
+				} else {
+					dir  = p.parent_path();
+					base = p.filename().string();
+					if (dir.empty())
+						dir = std::filesystem::current_path();
 				}
-				if (!lcp.empty() && lcp != ctx.editor.PromptText())
+
-					ctx.editor.SetPromptText(lcp);
+				std::error_code ec;
+				std::vector<std::filesystem::directory_entry> entries;
+				std::filesystem::directory_iterator it(dir, ec), end;
+				for (; !ec && it != end; it.increment(ec)) {
+					entries.push_back(*it);
+				}
+				// Filter by base prefix
+				std::vector<std::string> cands;
+				for (const auto &de: entries) {
+					std::string name = de.path().filename().string();
+					if (base.empty() || name.rfind(base, 0) == 0) {
+						std::string candidate = (dir / name).string();
+						// For dirs, add trailing slash hint
+						if (de.is_directory(ec))
+							candidate += "/";
+						cands.push_back(candidate);
+					}
+				}
+				// If no candidates, keep as-is
+				if (cands.empty()) {
+					// no-op
+				} else if (cands.size() == 1) {
+					ctx.editor.SetPromptText(cands[0]);
+				} else {
+					// Longest common prefix of display strings
+					auto lcp = cands[0];
+					for (size_t i = 1; i < cands.size(); ++i) {
+						const auto &s = cands[i];
+						size_t j      = 0;
+						while (j < lcp.size() && j < s.size() && lcp[j] == s[j])
+							++j;
+						lcp.resize(j);
+						if (lcp.empty())
+							break;
+					}
+					if (!lcp.empty() && lcp != ctx.editor.PromptText()) {
+						ctx.editor.SetPromptText(lcp);
+					} else {
+						// Show some choices in status (trim to avoid spam)
+						std::string msg = ctx.editor.PromptLabel() + ": ";
+						size_t shown    = 0;
+						for (const auto &s: cands) {
+							if (shown >= 10) {
+								msg += " …";
+								break;
+							}
+							if (shown > 0)
+								msg += ' ';
+							msg += std::filesystem::path(s).filename().string();
+							++shown;
+						}
+						ctx.editor.SetStatus(msg);
+						return true;
+					}
+				}
+				ctx.editor.SetStatus(ctx.editor.PromptLabel() + ": " + ctx.editor.PromptText());
+				return true;
 			}
-			ctx.editor.SetStatus(ctx.editor.PromptLabel() + ": " + ctx.editor.PromptText());
-			return true;
 		}
 
 		ctx.editor.AppendPromptText(ctx.arg);
@@ -909,6 +1061,20 @@ cmd_newline(CommandContext &ctx)
 				ensure_cursor_visible(ctx.editor, *b);
 		} else if (kind == Editor::PromptKind::OpenFile) {
 			std::string err;
+			// Expand "~" to the user's home directory
+			auto expand_user_path = [](const std::string &in) -> std::string {
+				if (!in.empty() && in[0] == '~') {
+					const char *home = std::getenv("HOME");
+					if (home && in.size() == 1)
+						return std::string(home);
+					if (home && (in.size() > 1) && (in[1] == '/' || in[1] == '\\')) {
+						std::string rest = in.substr(1);
+						return std::string(home) + rest;
+					}
+				}
+				return in;
+			};
+			value = expand_user_path(value);
 			if (value.empty()) {
 				ctx.editor.SetStatus("Open canceled (empty)");
 			} else if (!ctx.editor.OpenFile(value, err)) {
@@ -953,6 +1119,21 @@ cmd_newline(CommandContext &ctx)
 				if (!buf) {
 					ctx.editor.SetStatus("No buffer to save");
 				} else {
+					// Expand "~" for save path
+					auto expand_user_path = [](const std::string &in) -> std::string {
+						if (!in.empty() && in[0] == '~') {
+							const char *home = std::getenv("HOME");
+							if (home && in.size() == 1)
+								return std::string(home);
+							if (home && (in.size() > 1) && (
+								    in[1] == '/' || in[1] == '\\')) {
+								std::string rest = in.substr(1);
+								return std::string(home) + rest;
+							}
+						}
+						return in;
+					};
+					value = expand_user_path(value);
 					// If this is a first-time save (unnamed/non-file-backed) and the
 					// target exists, ask for confirmation before overwriting.
 					if (!buf->IsFileBacked() && std::filesystem::exists(value)) {
@@ -1031,6 +1212,43 @@ cmd_newline(CommandContext &ctx)
 			buf->SetCursor(0, y);
 			ensure_cursor_visible(ctx.editor, *buf);
 			ctx.editor.SetStatus("Goto line " + std::to_string(line1));
+		} else if (kind == Editor::PromptKind::Chdir) {
+			// Attempt to change the current working directory
+			if (value.empty()) {
+				ctx.editor.SetStatus("chdir canceled (empty)");
+				return true;
+			}
+			try {
+				// Expand "~" for chdir
+				auto expand_user_path = [](const std::string &in) -> std::string {
+					if (!in.empty() && in[0] == '~') {
+						const char *home = std::getenv("HOME");
+						if (home && in.size() == 1)
+							return std::string(home);
+						if (home && (in.size() > 1) && (in[1] == '/' || in[1] == '\\')) {
+							std::string rest = in.substr(1);
+							return std::string(home) + rest;
+						}
+					}
+					return in;
+				};
+				value = expand_user_path(value);
+				std::filesystem::path p(value);
+				std::error_code ec;
+				// Expand if value is relative: resolve against current_path implicitly
+				if (!std::filesystem::exists(p, ec)) {
+					ctx.editor.SetStatus(std::string("chdir: no such path: ") + value);
+					return true;
+				}
+				if (!std::filesystem::is_directory(p, ec)) {
+					ctx.editor.SetStatus(std::string("chdir: not a directory: ") + value);
+					return true;
+				}
+				std::filesystem::current_path(p);
+				ctx.editor.SetStatus(std::string("cwd: ") + std::filesystem::current_path().string());
+			} catch (const std::exception &e) {
+				ctx.editor.SetStatus(std::string("chdir failed: ") + e.what());
+			}
 		}
 		return true;
 	}
@@ -2435,6 +2653,20 @@ InstallDefaultCommands()
 		CommandId::MarkAllAndJumpEnd, "mark-all-jump-end", "Set mark at beginning and jump to end",
 		cmd_mark_all_and_jump_end
 	});
+	// GUI
+	CommandRegistry::Register({
+		CommandId::VisualFilePickerToggle, "file-picker-toggle", "Toggle visual file picker",
+		cmd_visual_file_picker_toggle
+	});
+	// Working directory
+	CommandRegistry::Register({
+		CommandId::ShowWorkingDirectory, "show-working-directory", "Show current working directory",
+		cmd_show_working_directory
+	});
+	CommandRegistry::Register({
+		CommandId::ChangeWorkingDirectory, "change-working-directory", "Change current working directory",
+		cmd_change_working_directory_start
+	});
 	// UI helpers
 	CommandRegistry::Register(
 		{CommandId::UArgStatus, "uarg-status", "Update universal-arg status", cmd_uarg_status});

Command.h

@@ -24,6 +24,8 @@ enum class CommandId {
 	KPrefix, // show "C-k _" prompt in status when entering k-command
 	FindStart, // begin incremental search (placeholder)
 	OpenFileStart, // begin open-file prompt
+	// GUI: visual file picker
+	VisualFilePickerToggle,
 	// Buffers
 	BufferSwitchStart, // begin buffer switch prompt
 	BufferClose,
@@ -74,6 +76,8 @@ enum class CommandId {
 	MarkAllAndJumpEnd, // set mark at beginning, jump to end (C-k a)
 	// Direct navigation by line number
 	JumpToLine, // prompt for line and jump (C-k g)
+	ShowWorkingDirectory, // Display the current working directory in the editor message.
+	ChangeWorkingDirectory, // Change the editor's current directory.
 	// Meta
 	UnknownKCommand, // arg: single character that was not recognized after C-k
 };

Editor.cc

@@ -1,7 +1,8 @@
-#include "Editor.h"
-
 #include <algorithm>
 #include <utility>
+#include <filesystem>
+
+#include "Editor.h"
 
 
 Editor::Editor() = default;
@@ -43,6 +44,78 @@ Editor::CurrentBuffer() const
 }
 
 
+static std::vector<std::filesystem::path>
+split_reverse(const std::filesystem::path &p)
+{
+	std::vector<std::filesystem::path> parts;
+	for (auto it = p; !it.empty(); it = it.parent_path()) {
+		if (it == it.parent_path()) {
+			// root or single element
+			if (!it.empty())
+				parts.push_back(it);
+			break;
+		}
+		parts.push_back(it.filename());
+	}
+	return parts; // from leaf toward root
+}
+
+
+std::string
+Editor::DisplayNameFor(const Buffer &buf) const
+{
+	std::string full = buf.Filename();
+	if (full.empty())
+		return std::string("[no name]");
+
+	std::filesystem::path target(full);
+	auto target_parts = split_reverse(target);
+	if (target_parts.empty())
+		return target.filename().string();
+
+	// Prepare list of other buffer paths
+	std::vector<std::vector<std::filesystem::path> > others;
+	others.reserve(buffers_.size());
+	for (const auto &b: buffers_) {
+		if (&b == &buf)
+			continue;
+		if (b.Filename().empty())
+			continue;
+		others.push_back(split_reverse(std::filesystem::path(b.Filename())));
+	}
+
+	// Increase suffix length until unique among others
+	std::size_t need = 1; // at least basename
+	for (;;) {
+		// Build candidate suffix for target
+		std::filesystem::path cand;
+		for (std::size_t i = 0; i < need && i < target_parts.size(); ++i) {
+			cand = std::filesystem::path(target_parts[i]) / cand;
+		}
+		// Compare against others
+		bool clash = false;
+		for (const auto &o_parts: others) {
+			std::filesystem::path ocand;
+			for (std::size_t i = 0; i < need && i < o_parts.size(); ++i) {
+				ocand = std::filesystem::path(o_parts[i]) / ocand;
+			}
+			if (ocand == cand) {
+				clash = true;
+				break;
+			}
+		}
+		if (!clash || need >= target_parts.size()) {
+			std::string s = cand.string();
+			// Remove any trailing slash that may appear from root joining
+			if (!s.empty() && (s.back() == '/' || s.back() == '\\'))
+				s.pop_back();
+			return s;
+		}
+		++need;
+	}
+}
+
+
 std::size_t
 Editor::AddBuffer(const Buffer &buf)
 {

Editor.h

@@ -302,7 +302,7 @@ public:
 
 
 	// --- Generic Prompt subsystem (for search, open-file, save-as, etc.) ---
-	enum class PromptKind { None = 0, Search, OpenFile, SaveAs, Confirm, BufferSwitch, GotoLine };
+	enum class PromptKind { None = 0, Search, OpenFile, SaveAs, Confirm, BufferSwitch, GotoLine, Chdir };
 
 
 	void StartPrompt(PromptKind kind, const std::string &label, const std::string &initial)
@@ -409,6 +409,11 @@ public:
 
 	const Buffer *CurrentBuffer() const;
 
+	// Compute a display-friendly short name for a buffer path that is the
+	// shortest unique suffix among all open buffers. If buffer has no name,
+	// returns "[no name]".
+	[[nodiscard]] std::string DisplayNameFor(const Buffer &buf) const;
+
 	// Add an existing buffer (copy/move) or open from file path
 	std::size_t AddBuffer(const Buffer &buf);
 
@@ -436,6 +441,31 @@ public:
 		return buffers_;
 	}
 
+
+	// --- GUI: Visual File Picker state ---
+	void SetFilePickerVisible(bool on)
+	{
+		file_picker_visible_ = on;
+	}
+
+
+	[[nodiscard]] bool FilePickerVisible() const
+	{
+		return file_picker_visible_;
+	}
+
+
+	void SetFilePickerDir(const std::string &path)
+	{
+		file_picker_dir_ = path;
+	}
+
+
+	[[nodiscard]] const std::string &FilePickerDir() const
+	{
+		return file_picker_dir_;
+	}
+
 private:
 	std::size_t rows_ = 0, cols_ = 0;
 	int mode_         = 0;
@@ -473,6 +503,10 @@ private:
 	std::string prompt_label_;
 	std::string prompt_text_;
 	std::string pending_overwrite_path_;
+
+	// GUI-only state (safe no-op in terminal builds)
+	bool file_picker_visible_ = false;
+	std::string file_picker_dir_;
 };
 
 #endif // KTE_EDITOR_H

Frontend.h

@@ -4,8 +4,6 @@
 #ifndef KTE_FRONTEND_H
 #define KTE_FRONTEND_H
 
-#include <memory>
-
 
 class Editor;
 class InputHandler;

GUIConfig.cc

@@ -0,0 +1,107 @@
+#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <sstream>
+#include <algorithm>
+
+#include "GUIConfig.h"
+
+
+static void
+trim(std::string &s)
+{
+	auto not_space = [](int ch) {
+		return !std::isspace(ch);
+	};
+	s.erase(s.begin(), std::find_if(s.begin(), s.end(), not_space));
+	s.erase(std::find_if(s.rbegin(), s.rend(), not_space).base(), s.end());
+}
+
+
+static std::string
+default_config_path()
+{
+	const char *home = std::getenv("HOME");
+	if (!home || !*home)
+		return std::string();
+	std::string path(home);
+	path += "/.config/kte/kge.ini";
+	return path;
+}
+
+
+GUIConfig
+GUIConfig::Load()
+{
+	GUIConfig cfg; // defaults already set
+	std::string path = default_config_path();
+	if (!path.empty()) {
+		cfg.LoadFromFile(path);
+	}
+	return cfg;
+}
+
+
+bool
+GUIConfig::LoadFromFile(const std::string &path)
+{
+	std::ifstream in(path);
+	if (!in.good())
+		return false;
+
+	std::string line;
+	while (std::getline(in, line)) {
+		// Remove comments starting with '#' or ';'
+		auto hash = line.find('#');
+		if (hash != std::string::npos)
+			line.erase(hash);
+		auto sc = line.find("//");
+		if (sc != std::string::npos)
+			line.erase(sc);
+		// Basic key=value
+		auto eq = line.find('=');
+		if (eq == std::string::npos)
+			continue;
+		std::string key = line.substr(0, eq);
+		std::string val = line.substr(eq + 1);
+		trim(key);
+		trim(val);
+		// Strip trailing semicolon
+		if (!val.empty() && val.back() == ';') {
+			val.pop_back();
+			trim(val);
+		}
+
+		// Lowercase key
+		std::transform(key.begin(), key.end(), key.begin(), [](unsigned char c) {
+			return (char) std::tolower(c);
+		});
+
+		if (key == "fullscreen") {
+			fullscreen = (val == "1" || val == "true" || val == "on" || val == "yes");
+		} else if (key == "columns" || key == "cols") {
+			int v = columns;
+			try {
+				v = std::stoi(val);
+			} catch (...) {}
+			if (v > 0)
+				columns = v;
+		} else if (key == "rows") {
+			int v = rows;
+			try {
+				v = std::stoi(val);
+			} catch (...) {}
+			if (v > 0)
+				rows = v;
+		} else if (key == "font_size" || key == "fontsize") {
+			float v = font_size;
+			try {
+				v = std::stof(val);
+			} catch (...) {}
+			if (v > 0.0f)
+				font_size = v;
+		}
+	}
+
+	return true;
+}

GUIConfig.h

@@ -0,0 +1,27 @@
+/*
+ * GUIConfig - loads simple GUI configuration from $HOME/.config/kte/kge.ini
+ */
+#ifndef KTE_GUI_CONFIG_H
+#define KTE_GUI_CONFIG_H
+
+#include <string>
+
+#ifndef KTE_FONT_SIZE
+#define KTE_FONT_SIZE 16.0f
+#endif
+
+class GUIConfig {
+public:
+	bool fullscreen = false;
+	int columns     = 80;
+	int rows        = 42;
+	float font_size = (float) KTE_FONT_SIZE;
+
+	// Load from default path: $HOME/.config/kte/kge.ini
+	static GUIConfig Load();
+
+	// Load from explicit path. Returns true if file existed and was parsed.
+	bool LoadFromFile(const std::string &path);
+};
+
+#endif // KTE_GUI_CONFIG_H

GUIFrontend.cc

@@ -1,18 +1,25 @@
-#include <SDL.h>
-#include <SDL_opengl.h>
-
-#include <imgui.h>
-#include <backends/imgui_impl_sdl2.h>
-#include <backends/imgui_impl_opengl3.h>
 #include <cstdio>
 #include <string>
 #include <cstring>
 #include <cstdlib>
+#include <algorithm>
+
+#include <SDL.h>
+#include <SDL_opengl.h>
+#include <imgui.h>
+#include <backends/imgui_impl_sdl2.h>
+#include <backends/imgui_impl_opengl3.h>
 
 #include "Editor.h"
 #include "Command.h"
 #include "GUIFrontend.h"
 #include "Font.h" // embedded default font (DefaultFontRegular)
+#include "GUIConfig.h"
+
+
+#ifndef KTE_FONT_SIZE
+#define KTE_FONT_SIZE 16.0f
+#endif
 
 static const char *kGlslVersion = "#version 150"; // GL 3.2 core (macOS compatible)
 
@@ -24,6 +31,9 @@ GUIFrontend::Init(Editor &ed)
 		return false;
 	}
 
+	// Load GUI configuration (fullscreen, columns/rows, font size)
+	const auto [fullscreen, columns, rows, font_size] = GUIConfig::Load();
+
 	// GL attributes for core profile
 	SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
 	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
@@ -33,14 +43,56 @@ GUIFrontend::Init(Editor &ed)
 	SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
 	SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
 
+	// Compute desired window size from config
+	Uint32 win_flags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI;
+
+	if (fullscreen) {
+		// "Fullscreen": fill the usable bounds of the primary display.
+		// On macOS, do NOT use true fullscreen so the menu/status bar remains visible.
+		SDL_Rect usable{};
+		if (SDL_GetDisplayUsableBounds(0, &usable) == 0) {
+			width_  = usable.w;
+			height_ = usable.h;
+		}
+#if !defined(__APPLE__)
+		// Non-macOS: desktop fullscreen uses the current display resolution.
+		win_flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
+#endif
+	} else {
+		// Windowed: width = columns * font_size, height = (rows * 2) * font_size
+		int w = static_cast<int>(columns * font_size);
+		int h = static_cast<int>((rows * 2) * font_size);
+
+		// As a safety, clamp to display usable bounds if retrievable
+		SDL_Rect usable{};
+		if (SDL_GetDisplayUsableBounds(0, &usable) == 0) {
+			w = std::min(w, usable.w);
+			h = std::min(h, usable.h);
+		}
+		width_  = std::max(320, w);
+		height_ = std::max(200, h);
+	}
+
 	window_ = SDL_CreateWindow(
-		"kte",
+		"kge - kyle's text editor " KTE_VERSION_STR,
 		SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
 		width_, height_,
-		SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
+		win_flags);
 	if (!window_)
 		return false;
 
+#if defined(__APPLE__)
+	// macOS: when "fullscreen" is requested, position the window at the
+	// top-left of the usable display area to mimic fullscreen while keeping
+	// the system menu bar visible.
+	if (fullscreen) {
+		SDL_Rect usable{};
+		if (SDL_GetDisplayUsableBounds(0, &usable) == 0) {
+			SDL_SetWindowPosition(window_, usable.x, usable.y);
+		}
+	}
+#endif
+
 	gl_ctx_ = SDL_GL_CreateContext(window_);
 	if (!gl_ctx_)
 		return false;
@@ -64,11 +116,23 @@ GUIFrontend::Init(Editor &ed)
 	width_  = w;
 	height_ = h;
 
-	// Initialize GUI font from embedded default
+#if defined(__APPLE__)
-#ifndef KTE_FONT_SIZE
+	// Workaround: On macOS Retina when starting maximized, we sometimes get a
-#define KTE_FONT_SIZE 16.0f
+	// subtle input vs draw alignment mismatch until the first manual resize.
+	// Nudge the window size by 1px and back to trigger a proper internal
+	// recomputation, without visible impact.
+	if (w > 1 && h > 1) {
+		SDL_SetWindowSize(window_, w - 1, h - 1);
+		SDL_SetWindowSize(window_, w, h);
+		// Update cached size in case backend reports immediately
+		SDL_GetWindowSize(window_, &w, &h);
+		width_  = w;
+		height_ = h;
+	}
 #endif
-	LoadGuiFont_(nullptr, (float) KTE_FONT_SIZE);
+
+	// Initialize GUI font from embedded default (use configured size or compiled default)
+	LoadGuiFont_(nullptr, (float) font_size);
 
 	return true;
 }

GUIFrontend.h

@@ -8,6 +8,7 @@
 #include "GUIInputHandler.h"
 #include "GUIRenderer.h"
 
+
 struct SDL_Window;
 typedef void *SDL_GLContext;
 

GUIInputHandler.cc

@@ -1,7 +1,8 @@
-#include <SDL.h>
 #include <cstdio>
 #include <ncurses.h>
 
+#include <SDL.h>
+
 #include "GUIInputHandler.h"
 #include "KKeymap.h"
 

GUIInputHandler.h

@@ -4,11 +4,12 @@
 #ifndef KTE_GUI_INPUT_HANDLER_H
 #define KTE_GUI_INPUT_HANDLER_H
 
-#include <queue>
 #include <mutex>
+#include <queue>
 
 #include "InputHandler.h"
 
+
 union SDL_Event; // fwd decl to avoid including SDL here (SDL defines SDL_Event as a union)
 
 class GUIInputHandler final : public InputHandler {

GUIRenderer.cc

@@ -1,27 +1,44 @@
-#include "GUIRenderer.h"
+#include <cmath>
-
+#include <cstdio>
-#include "Editor.h"
+#include <filesystem>
-#include "Buffer.h"
+#include <limits>
-#include "Command.h"
+#include <string>
 
 #include <imgui.h>
-#include <cstdio>
+
-#include <string>
+#include "GUIRenderer.h"
-#include <filesystem>
+#include "Buffer.h"
+#include "Command.h"
+#include "Editor.h"
+
 
 // Version string expected to be provided by build system as KTE_VERSION_STR
 #ifndef KTE_VERSION_STR
 #  define KTE_VERSION_STR "dev"
 #endif
 
+// ImGui compatibility: some bundled ImGui versions (or builds without docking)
+// don't define ImGuiWindowFlags_NoDocking. Treat it as 0 in that case.
+#ifndef ImGuiWindowFlags_NoDocking
+#  define ImGuiWindowFlags_NoDocking 0
+#endif
+
 
 void
 GUIRenderer::Draw(Editor &ed)
 {
 	// Make the editor window occupy the entire GUI container/viewport
 	ImGuiViewport *vp = ImGui::GetMainViewport();
-	ImGui::SetNextWindowPos(vp->Pos);
+	// On HiDPI/Retina, snap to integer pixels to prevent any draw vs hit-test
-	ImGui::SetNextWindowSize(vp->Size);
+	// mismatches that can appear on the very first maximized frame.
+	ImVec2 main_pos = vp->Pos;
+	ImVec2 main_sz  = vp->Size;
+	main_pos.x      = std::floor(main_pos.x + 0.5f);
+	main_pos.y      = std::floor(main_pos.y + 0.5f);
+	main_sz.x       = std::floor(main_sz.x + 0.5f);
+	main_sz.y       = std::floor(main_sz.y + 0.5f);
+	ImGui::SetNextWindowPos(main_pos);
+	ImGui::SetNextWindowSize(main_sz);
 
 	ImGuiWindowFlags flags = ImGuiWindowFlags_NoTitleBar
 	                         | ImGuiWindowFlags_NoResize
@@ -63,30 +80,45 @@ GUIRenderer::Draw(Editor &ed)
 		bool forced_scroll = false;
 		{
 			static long prev_buf_rowoffs = -1; // previous frame's Buffer::Rowoffs
+			static long prev_buf_coloffs = -1; // previous frame's Buffer::Coloffs
 			static float prev_scroll_y   = -1.0f; // previous frame's ImGui scroll Y in pixels
+			static float prev_scroll_x   = -1.0f; // previous frame's ImGui scroll X in pixels
 
 			const long buf_rowoffs = static_cast<long>(buf->Rowoffs());
+			const long buf_coloffs = static_cast<long>(buf->Coloffs());
 			const long scroll_top  = static_cast<long>(scroll_y / row_h);
+			const long scroll_left = static_cast<long>(scroll_x / space_w);
 
 			// Detect programmatic change (e.g., keyboard navigation ensured visibility)
 			if (prev_buf_rowoffs >= 0 && buf_rowoffs != prev_buf_rowoffs) {
 				ImGui::SetScrollY(static_cast<float>(buf_rowoffs) * row_h);
 				scroll_y      = ImGui::GetScrollY();
 				forced_scroll = true;
-			} else {
+			}
-				// If user scrolled (scroll_y changed), update buffer row offset accordingly
+			if (prev_buf_coloffs >= 0 && buf_coloffs != prev_buf_coloffs) {
-				if (prev_scroll_y >= 0.0f && scroll_y != prev_scroll_y) {
+				ImGui::SetScrollX(static_cast<float>(buf_coloffs) * space_w);
-					if (Buffer *mbuf = const_cast<Buffer *>(buf)) {
+				scroll_x      = ImGui::GetScrollX();
-						// Keep horizontal offset owned by GUI; only update vertical offset here
+				forced_scroll = true;
-						mbuf->SetOffsets(static_cast<std::size_t>(std::max(0L, scroll_top)),
+			}
-						                 mbuf->Coloffs());
+			// If user scrolled, update buffer offsets accordingly
-					}
+			if (prev_scroll_y >= 0.0f && scroll_y != prev_scroll_y) {
+				if (Buffer *mbuf = const_cast<Buffer *>(buf)) {
+					mbuf->SetOffsets(static_cast<std::size_t>(std::max(0L, scroll_top)),
+					                 mbuf->Coloffs());
+				}
+			}
+			if (prev_scroll_x >= 0.0f && scroll_x != prev_scroll_x) {
+				if (Buffer *mbuf = const_cast<Buffer *>(buf)) {
+					mbuf->SetOffsets(mbuf->Rowoffs(),
+					                 static_cast<std::size_t>(std::max(0L, scroll_left)));
 				}
 			}
 
 			// Update trackers for next frame
 			prev_buf_rowoffs = static_cast<long>(buf->Rowoffs());
+			prev_buf_coloffs = static_cast<long>(buf->Coloffs());
 			prev_scroll_y    = ImGui::GetScrollY();
+			prev_scroll_x    = ImGui::GetScrollX();
 		}
 		// Synchronize cursor and scrolling.
 		// Ensure the cursor is visible even on the first frame or when it didn't move,
@@ -120,61 +152,127 @@ GUIRenderer::Draw(Editor &ed)
 		// Handle mouse click before rendering to avoid dependent on drawn items
 		if (ImGui::IsWindowHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
 			ImVec2 mp = ImGui::GetIO().MousePos;
-			// Map Y to row
+			// Compute viewport-relative row so (0) is top row of the visible area
-			float rel_y = scroll_y + (mp.y - list_origin.y);
+			float vy_f = (mp.y - list_origin.y - scroll_y) / row_h;
-			long row    = static_cast<long>(rel_y / row_h);
+			long vy    = static_cast<long>(vy_f);
-			if (row < 0)
+			if (vy < 0)
-				row = 0;
+				vy = 0;
-			if (row >= static_cast<long>(lines.size()))
+
-				row = static_cast<long>(lines.empty() ? 0 : (lines.size() - 1));
+			// Clamp vy within visible content height to avoid huge jumps
-			// Map X to column by measuring text width
+			ImVec2 cr_min = ImGui::GetWindowContentRegionMin();
-			std::size_t col = 0;
+			ImVec2 cr_max = ImGui::GetWindowContentRegionMax();
-			if (!lines.empty()) {
+			float child_h = (cr_max.y - cr_min.y);
-				const std::string &line = lines[static_cast<std::size_t>(row)];
+			long vis_rows = static_cast<long>(child_h / row_h);
-				float rel_x             = scroll_x + (mp.x - list_origin.x);
+			if (vis_rows < 1)
-				if (rel_x <= 0.0f) {
+				vis_rows = 1;
-					col = 0;
+			if (vy >= vis_rows)
-				} else {
+				vy = vis_rows - 1;
-					float prev_w = 0.0f;
+
-					for (std::size_t i = 1; i <= line.size(); ++i) {
+			// Translate viewport row to buffer row using Buffer::Rowoffs
-						ImVec2 sz = ImGui::CalcTextSize(
+			std::size_t by = buf->Rowoffs() + static_cast<std::size_t>(vy);
-							line.c_str(), line.c_str() + static_cast<long>(i));
+			if (by >= lines.size()) {
-						if (sz.x >= rel_x) {
+				if (!lines.empty())
-							// Pick closer between i-1 and i
+					by = lines.size() - 1;
-							float d_prev = rel_x - prev_w;
+				else
-							float d_curr = sz.x - rel_x;
+					by = 0;
-							col          = (d_prev <= d_curr) ? (i - 1) : i;
+			}
-							break;
+
-						}
+			// Compute desired pixel X inside the viewport content (subtract horizontal scroll)
-						prev_w = sz.x;
+			float px = (mp.x - list_origin.x - scroll_x);
-						if (i == line.size()) {
+			if (px < 0.0f)
-							// clicked beyond EOL
+				px = 0.0f;
-							float eol_w = sz.x;
+
-							col         = (rel_x > eol_w + space_w * 0.5f)
+			// Convert pixel X to a render-column target including horizontal col offset
-								      ? line.size()
+			// Use our own tab expansion of width 8 to match command layer logic.
-								      : line.size();
+			const std::string &line_clicked = lines[by];
-						}
+			const std::size_t tabw          = 8;
+			// We iterate source columns computing absolute rendered column (rx_abs) from 0,
+			// then translate to viewport-space by subtracting Coloffs.
+			std::size_t coloffs = buf->Coloffs();
+			std::size_t rx_abs  = 0; // absolute rendered column
+			std::size_t i       = 0; // source column iterator
+
+			// Fast-forward i until rx_abs >= coloffs to align with leftmost visible column
+			if (!line_clicked.empty() && coloffs > 0) {
+				while (i < line_clicked.size() && rx_abs < coloffs) {
+					if (line_clicked[i] == '\t') {
+						rx_abs += (tabw - (rx_abs % tabw));
+					} else {
+						rx_abs += 1;
 					}
+					++i;
 				}
 			}
-			// Dispatch command to move cursor
+
+			// Now search for closest source column to clicked px within/after viewport
+			std::size_t best_col = i; // default to first visible column
+			float best_dist      = std::numeric_limits<float>::infinity();
+			while (true) {
+				// For i in [current..size], evaluate candidate including the implicit end position
+				std::size_t rx_view = (rx_abs >= coloffs) ? (rx_abs - coloffs) : 0;
+				float rx_px         = static_cast<float>(rx_view) * space_w;
+				float dist          = std::fabs(px - rx_px);
+				if (dist <= best_dist) {
+					best_dist = dist;
+					best_col  = i;
+				}
+				if (i == line_clicked.size())
+					break;
+				// advance to next source column
+				if (line_clicked[i] == '\t') {
+					rx_abs += (tabw - (rx_abs % tabw));
+				} else {
+					rx_abs += 1;
+				}
+				++i;
+			}
+
+			// Dispatch absolute buffer coordinates (row:col)
 			char tmp[64];
-			std::snprintf(tmp, sizeof(tmp), "%ld:%zu", row, col);
+			std::snprintf(tmp, sizeof(tmp), "%zu:%zu", by, best_col);
 			Execute(ed, CommandId::MoveCursorTo, std::string(tmp));
 		}
+		// Cache current horizontal offset in rendered columns
+		const std::size_t coloffs_now = buf->Coloffs();
 		for (std::size_t i = rowoffs; i < lines.size(); ++i) {
 			// Capture the screen position before drawing the line
 			ImVec2 line_pos         = ImGui::GetCursorScreenPos();
 			const std::string &line = lines[i];
-			ImGui::TextUnformatted(line.c_str());
+
+			// Expand tabs to spaces with width=8 and apply horizontal scroll offset
+			const std::size_t tabw = 8;
+			std::string expanded;
+			expanded.reserve(line.size() + 16);
+			std::size_t rx_abs_draw = 0; // rendered column for drawing
+			// Emit entire line (ImGui child scrolling will handle clipping)
+			for (std::size_t src = 0; src < line.size(); ++src) {
+				char c = line[src];
+				if (c == '\t') {
+					std::size_t adv = (tabw - (rx_abs_draw % tabw));
+					// Emit spaces for the tab
+					expanded.append(adv, ' ');
+					rx_abs_draw += adv;
+				} else {
+					expanded.push_back(c);
+					rx_abs_draw += 1;
+				}
+			}
+
+			ImGui::TextUnformatted(expanded.c_str());
 
 			// Draw a visible cursor indicator on the current line
 			if (i == cy) {
-				// Compute X offset by measuring text width up to cursor column
+				// Compute rendered X (rx) from source column with tab expansion
-				std::size_t px_count = std::min(cx, line.size());
+				std::size_t rx_abs = 0;
-				ImVec2 pre_sz        = ImGui::CalcTextSize(line.c_str(),
+				for (std::size_t k = 0; k < std::min(cx, line.size()); ++k) {
-				                                    line.c_str() + static_cast<long>(px_count));
+					if (line[k] == '\t')
-				ImVec2 p0 = ImVec2(line_pos.x + pre_sz.x, line_pos.y);
+						rx_abs += (tabw - (rx_abs % tabw));
+					else
+						rx_abs += 1;
+				}
+				// Convert to viewport x by subtracting horizontal col offset
+				std::size_t rx_viewport = (rx_abs > coloffs_now) ? (rx_abs - coloffs_now) : 0;
+				ImVec2 p0 = ImVec2(line_pos.x + static_cast<float>(rx_viewport) * space_w, line_pos.y);
 				ImVec2 p1 = ImVec2(p0.x + space_w, p0.y + line_h);
 				ImU32 col = IM_COL32(200, 200, 255, 128); // soft highlight
 				ImGui::GetWindowDrawList()->AddRectFilled(p0, p1, col);
@@ -204,18 +302,38 @@ GUIRenderer::Draw(Editor &ed)
 		left += "kge"; // GUI app name
 		left += " ";
 		left += KTE_VERSION_STR;
-		std::string fname = buf->Filename();
+		std::string fname;
-		if (!fname.empty()) {
+		try {
+			fname = ed.DisplayNameFor(*buf);
+		} catch (...) {
+			fname = buf->Filename();
 			try {
 				fname = std::filesystem::path(fname).filename().string();
 			} catch (...) {}
-		} else {
-			fname = "[no name]";
 		}
 		left += "  ";
+		// Insert buffer position prefix "[x/N] " before filename
+		{
+			std::size_t total = ed.BufferCount();
+			if (total > 0) {
+				std::size_t idx1 = ed.CurrentBufferIndex() + 1; // 1-based for display
+				left += "[";
+				left += std::to_string(static_cast<unsigned long long>(idx1));
+				left += "/";
+				left += std::to_string(static_cast<unsigned long long>(total));
+				left += "] ";
+			}
+		}
 		left += fname;
 		if (buf->Dirty())
 			left += " *";
+		// Append total line count as "<n>L"
+		{
+			unsigned long lcount = static_cast<unsigned long>(buf->Rows().size());
+			left += " ";
+			left += std::to_string(lcount);
+			left += "L";
+		}
 
 		// Build right text (cursor/mark)
 		int row1       = static_cast<int>(buf->Cury()) + 1;
@@ -288,4 +406,153 @@ GUIRenderer::Draw(Editor &ed)
 
 	ImGui::End();
 	ImGui::PopStyleVar(3);
+
+	// --- Visual File Picker overlay (GUI only) ---
+	if (ed.FilePickerVisible()) {
+		// Centered popup-style window that always fits within the current viewport
+		ImGuiViewport *vp2 = ImGui::GetMainViewport();
+
+		// Desired size, min size, and margins
+		const ImVec2 want(800.0f, 500.0f);
+		const ImVec2 min_sz(240.0f, 160.0f);
+		const float margin = 20.0f; // space from viewport edges
+
+		// Compute the maximum allowed size (viewport minus margins) and make sure it's not negative
+		ImVec2 max_sz(std::max(32.0f, vp2->Size.x - 2.0f * margin),
+		              std::max(32.0f, vp2->Size.y - 2.0f * margin));
+
+		// Clamp desired size to [min_sz, max_sz]
+		ImVec2 size(std::min(want.x, max_sz.x), std::min(want.y, max_sz.y));
+		size.x = std::max(size.x, std::min(min_sz.x, max_sz.x));
+		size.y = std::max(size.y, std::min(min_sz.y, max_sz.y));
+
+		// Center within the viewport using the final size
+		ImVec2 pos(vp2->Pos.x + std::max(margin, (vp2->Size.x - size.x) * 0.5f),
+		           vp2->Pos.y + std::max(margin, (vp2->Size.y - size.y) * 0.5f));
+
+		// On HiDPI displays (macOS Retina), ensure integer pixel alignment to avoid
+		// potential hit-test vs draw mismatches from sub-pixel positions.
+		pos.x  = std::floor(pos.x + 0.5f);
+		pos.y  = std::floor(pos.y + 0.5f);
+		size.x = std::floor(size.x + 0.5f);
+		size.y = std::floor(size.y + 0.5f);
+
+		ImGui::SetNextWindowPos(pos, ImGuiCond_Always);
+		ImGui::SetNextWindowSize(size, ImGuiCond_Always);
+		ImGuiWindowFlags wflags = ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse |
+		                          ImGuiWindowFlags_NoDocking;
+		bool open = true;
+		if (ImGui::Begin("File Picker", &open, wflags)) {
+			// Current directory
+			std::string curdir = ed.FilePickerDir();
+			if (curdir.empty()) {
+				try {
+					curdir = std::filesystem::current_path().string();
+				} catch (...) {
+					curdir = ".";
+				}
+				ed.SetFilePickerDir(curdir);
+			}
+			ImGui::TextUnformatted(curdir.c_str());
+			ImGui::SameLine();
+			if (ImGui::Button("Up")) {
+				try {
+					std::filesystem::path p(curdir);
+					if (p.has_parent_path()) {
+						ed.SetFilePickerDir(p.parent_path().string());
+					}
+				} catch (...) {}
+			}
+			ImGui::SameLine();
+			if (ImGui::Button("Close")) {
+				ed.SetFilePickerVisible(false);
+			}
+
+			ImGui::Separator();
+
+			// Header
+			ImGui::TextUnformatted("Name");
+			ImGui::Separator();
+
+			// Scrollable list
+			ImGui::BeginChild("picker-list", ImVec2(0, 0), true);
+
+			// Build entries: directories first then files, alphabetical
+			struct Entry {
+				std::string name;
+				std::filesystem::path path;
+				bool is_dir;
+			};
+			std::vector<Entry> entries;
+			entries.reserve(256);
+			// Optional parent entry
+			try {
+				std::filesystem::path base(curdir);
+				std::error_code ec;
+				for (auto it = std::filesystem::directory_iterator(base, ec);
+				     !ec && it != std::filesystem::directory_iterator(); it.increment(ec)) {
+					const auto &p = it->path();
+					std::string nm;
+					try {
+						nm = p.filename().string();
+					} catch (...) {
+						continue;
+					}
+					if (nm == "." || nm == "..")
+						continue;
+					bool is_dir = false;
+					std::error_code ec2;
+					is_dir = it->is_directory(ec2);
+					entries.push_back({nm, p, is_dir});
+				}
+			} catch (...) {
+				// ignore listing errors; show empty
+			}
+			std::sort(entries.begin(), entries.end(), [](const Entry &a, const Entry &b) {
+				if (a.is_dir != b.is_dir)
+					return a.is_dir && !b.is_dir;
+				return a.name < b.name;
+			});
+
+			// Draw rows
+			int idx = 0;
+			for (const auto &e: entries) {
+				ImGui::PushID(idx++); // ensure unique/stable IDs even if names repeat
+				std::string label;
+				label.reserve(e.name.size() + 4);
+				if (e.is_dir)
+					label += "[";
+				label += e.name;
+				if (e.is_dir)
+					label += "]";
+
+				// Render selectable row
+				ImGui::Selectable(label.c_str(), false, ImGuiSelectableFlags_AllowDoubleClick);
+
+				// Activate based strictly on hover + mouse, to avoid any off-by-one due to click routing
+				if (ImGui::IsItemHovered()) {
+					if (e.is_dir && ImGui::IsMouseDoubleClicked(ImGuiMouseButton_Left)) {
+						// Enter directory on double-click
+						ed.SetFilePickerDir(e.path.string());
+					} else if (!e.is_dir && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
+						// Open file on single click
+						std::string err;
+						if (!ed.OpenFile(e.path.string(), err)) {
+							ed.SetStatus(std::string("open: ") + err);
+						} else {
+							ed.SetStatus(std::string("Opened: ") + e.name);
+						}
+						ed.SetFilePickerVisible(false);
+					}
+				}
+				ImGui::PopID();
+			}
+
+			ImGui::EndChild();
+		}
+		ImGui::End();
+		if (!open) {
+			ed.SetFilePickerVisible(false);
+		}
+	}
 }

GUIRenderer.h

@@ -6,7 +6,7 @@
 
 #include "Renderer.h"
 
-class GUIRenderer : public Renderer {
+class GUIRenderer final : public Renderer {
 public:
 	GUIRenderer() = default;
 

GapBuffer.cc

@@ -1,9 +1,10 @@
-#include "GapBuffer.h"
-
 #include <algorithm>
 #include <cassert>
 #include <cstring>
 
+#include "GapBuffer.h"
+
+
 GapBuffer::GapBuffer() = default;
 
 

GapBuffer.h

@@ -6,6 +6,7 @@
 
 #include <cstddef>
 
+
 class GapBuffer {
 public:
 	GapBuffer();

InputHandler.h

@@ -8,6 +8,7 @@
 
 #include "Command.h"
 
+
 // Result of translating raw input into an editor command.
 struct MappedInput {
 	bool hasCommand = false;

KKeymap.cc

@@ -1,5 +1,8 @@
-#include "KKeymap.h"
+#include <iostream>
 #include <ncurses.h>
+#include <ostream>
+
+#include "KKeymap.h"
 
 
 auto
@@ -13,17 +16,15 @@ KLookupKCommand(const int ascii_key, const bool ctrl, CommandId &out) -> bool
 		switch (k_lower) {
 		case 'd':
 			out = CommandId::KillLine;
-			return true; // C-k C-d
+			return true;
-		case 'x':
-			out = CommandId::SaveAndQuit;
-			return true; // C-k C-x
 		case 'q':
 			out = CommandId::QuitNow;
-			return true; // C-k C-q (quit immediately)
+			return true;
+		case 'x':
+			out = CommandId::SaveAndQuit;
+			return true;
 		default:
-			// Important: do not return here — fall through to non-ctrl table
+			return false;
-			// so that C-k u/U still work even if Ctrl is (incorrectly) held
-			break;
 		}
 	}
 
@@ -33,65 +34,78 @@ KLookupKCommand(const int ascii_key, const bool ctrl, CommandId &out) -> bool
 		return true;
 	}
 
-	// 3) Non-control k-table (lowercased)
 	switch (k_lower) {
-	case 'j':
-		out = CommandId::JumpToMark;
-		return true; // C-k j
-	case 'f':
-		out = CommandId::FlushKillRing;
-		return true; // C-k f
-	case 'd':
-		out = CommandId::KillToEOL;
-		return true; // C-k d
-	case 'y':
-		out = CommandId::Yank;
-		return true; // C-k y
-	case 's':
-		out = CommandId::Save;
-		return true; // C-k s
-	case 'e':
-		out = CommandId::OpenFileStart;
-		return true; // C-k e (open file)
-	case 'b':
-		out = CommandId::BufferSwitchStart;
-		return true; // C-k b (switch buffer by name)
-	case 'c':
-		out = CommandId::BufferClose;
-		return true; // C-k c (close current buffer)
-	case 'n':
-		out = CommandId::BufferPrev;
-		return true; // C-k n (switch to previous buffer)
-	case 'x':
-		out = CommandId::SaveAndQuit;
-		return true; // C-k x
-	case 'q':
-		out = CommandId::Quit;
-		return true; // C-k q
-	case 'p':
-		out = CommandId::BufferNext;
-		return true; // C-k p (switch to next buffer)
-	case 'u':
-		out = CommandId::Undo;
-		return true; // C-k u (undo)
-	case '-':
-		out = CommandId::UnindentRegion;
-		return true; // C-k - (unindent region)
-	case '=':
-		out = CommandId::IndentRegion;
-		return true; // C-k = (indent region)
-	case 'l':
-		out = CommandId::ReloadBuffer;
-		return true; // C-k l (reload buffer)
 	case 'a':
 		out = CommandId::MarkAllAndJumpEnd;
-		return true; // C-k a (mark all and jump to end)
+		return true;
+	case 'b':
+		out = CommandId::BufferSwitchStart;
+		return true;
+	case 'c':
+		out = CommandId::BufferClose;
+		return true;
+	case 'd':
+		out = CommandId::KillToEOL;
+		return true;
+	case 'e':
+		out = CommandId::OpenFileStart;
+		return true;
+	case 'E':
+		std::cerr << "E is not a valid command" << std::endl;
+		return false;
+	case 'f':
+		out = CommandId::FlushKillRing;
+		return true;
 	case 'g':
 		out = CommandId::JumpToLine;
-		return true; // C-k g (goto line)
+		return true;
+	case 'j':
+		out = CommandId::JumpToMark;
+		return true;
+	case 'l':
+		out = CommandId::ReloadBuffer;
+		return true;
+	case 'n':
+		out = CommandId::BufferPrev;
+		return true;
+	case 'o':
+		out = CommandId::ChangeWorkingDirectory;
+		return true;
+	case 'p':
+		out = CommandId::BufferNext;
+		return true;
+	case 'q':
+		out = CommandId::Quit;
+		return true;
+	case 's':
+		out = CommandId::Save;
+		return true;
+	case 'u':
+		out = CommandId::Undo;
+		return true;
+	case 'v':
+		out = CommandId::VisualFilePickerToggle;
+		return true;
+	case 'w':
+		out = CommandId::ShowWorkingDirectory;
+		return true;
+	case 'x':
+		out = CommandId::SaveAndQuit;
+		return true;
+	case 'y':
+		out = CommandId::Yank;
+		return true;
+	case '-':
+		out = CommandId::UnindentRegion;
+		return true;
+	case '=':
+		out = CommandId::IndentRegion;
+		return true;
 	default:
 		break;
 	}
+
+	// 3) Non-control k-table (lowercased)
 	return false;
 }
 
@@ -137,9 +151,6 @@ KLookupCtrlCommand(const int ascii_key, CommandId &out) -> bool
 	case 'g':
 		out = CommandId::Refresh;
 		return true;
-	case 'x':
-		out = CommandId::SaveAndQuit; // direct C-x mapping (GUI had this)
-		return true;
 	default:
 		break;
 	}

KKeymap.h

@@ -6,6 +6,7 @@
 
 #include "Command.h"
 
+
 // Lookup the command to execute after a C-k prefix.
 // Parameters:
 //  - ascii_key: ASCII code of the key, preferably lowercased if it's a letter.

PieceTable.h

@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+
 class PieceTable {
 public:
 	PieceTable();

README.md

@@ -2,8 +2,8 @@ kte — Kyle's Text Editor
 
 Vision
 -------
-kte will be a small, fast, and understandable text editor with a
+kte is a small, fast, and understandable text editor with a
-terminal<EFBFBD>first UX and an optional ImGui GUI. It modernizes the
+terminal-first UX and an optional ImGui GUI. It modernizes the
 original ke editor while preserving its familiar WordStar/VDE‑style
 command model and Emacs‑influenced ergonomics. The focus is on
 simplicity of design, excellent latency, and pragmatic features you
@@ -80,6 +80,15 @@ Interfaces
 - GUI: an optional ImGui‑based frontend that embeds the same editor
   core.
 
+Man pages
+---------
+
+- Terminal editor: `docs/kte.1` (view locally with `man -l docs/kte.1`)
+- GUI frontend: `docs/kge.1` (view locally with `man -l docs/kge.1`)
+
+The `ke` keybinding reference remains the canonical source for
+commands while kte evolves: see `docs/ke.md`.
+
 Architecture (intended)
 -----------------------
 
@@ -180,6 +189,15 @@ Run:
 ./cmake-build-debug/kte [files]
 ```
 
+If you configured the GUI, you can also run the GUI-first target (when
+built as `kge`) or request the GUI from `kte`:
+
+```
+./cmake-build-debug/kte --gui [files]
+# or if built/installed as a separate GUI target
+./cmake-build-debug/kge [files]
+```
+
 GUI build example
 -----------------
 

TerminalFrontend.cc

@@ -1,10 +1,10 @@
-#include <unistd.h>
-#include <termios.h>
 #include <ncurses.h>
+#include <termios.h>
+#include <unistd.h>
 
-#include "Editor.h"
-#include "Command.h"
 #include "TerminalFrontend.h"
+#include "Command.h"
+#include "Editor.h"
 
 
 bool

TerminalFrontend.h

@@ -4,10 +4,11 @@
 #ifndef KTE_TERMINAL_FRONTEND_H
 #define KTE_TERMINAL_FRONTEND_H
 
+#include <termios.h>
+
 #include "Frontend.h"
 #include "TerminalInputHandler.h"
 #include "TerminalRenderer.h"
-#include <termios.h>
 
 
 class TerminalFrontend final : public Frontend {

TerminalInputHandler.cc

@@ -1,8 +1,8 @@
-#include <ncurses.h>
 #include <cstdio>
+#include <ncurses.h>
 
-#include "KKeymap.h"
 #include "TerminalInputHandler.h"
+#include "KKeymap.h"
 
 namespace {
 constexpr int

TerminalInputHandler.h

@@ -4,8 +4,6 @@
 #ifndef KTE_TERMINAL_INPUT_HANDLER_H
 #define KTE_TERMINAL_INPUT_HANDLER_H
 
-#include <cstdint>
-
 #include "InputHandler.h"
 
 

TerminalRenderer.cc

@@ -1,19 +1,19 @@
-#include "TerminalRenderer.h"
-
-#include <ncurses.h>
-#include <cstdio>
-#include <string>
 #include <algorithm>
+#include <cstdio>
 #include <filesystem>
+#include <ncurses.h>
+#include <string>
 
-#include "Editor.h"
+#include "TerminalRenderer.h"
 #include "Buffer.h"
+#include "Editor.h"
 
 // Version string expected to be provided by build system as KTE_VERSION_STR
 #ifndef KTE_VERSION_STR
 #  define KTE_VERSION_STR "dev"
 #endif
 
+
 TerminalRenderer::TerminalRenderer() = default;
 
 TerminalRenderer::~TerminalRenderer() = default;
@@ -168,21 +168,40 @@ TerminalRenderer::Draw(Editor &ed)
 		const Buffer *b = buf;
 		std::string fname;
 		if (b) {
-			fname = b->Filename();
-		}
-		if (!fname.empty()) {
 			try {
-				fname = std::filesystem::path(fname).filename().string();
+				fname = ed.DisplayNameFor(*b);
 			} catch (...) {
-				// keep original on any error
+				fname = b->Filename();
+				try {
+					fname = std::filesystem::path(fname).filename().string();
+				} catch (...) {}
 			}
 		} else {
 			fname = "[no name]";
 		}
 		left += "  ";
+		// Insert buffer position prefix "[x/N] " before filename
+		{
+			std::size_t total = ed.BufferCount();
+			if (total > 0) {
+				std::size_t idx1 = ed.CurrentBufferIndex() + 1; // human-friendly 1-based
+				left += "[";
+				left += std::to_string(static_cast<unsigned long long>(idx1));
+				left += "/";
+				left += std::to_string(static_cast<unsigned long long>(total));
+				left += "] ";
+			}
+		}
 		left += fname;
 		if (b && b->Dirty())
 			left += " *";
+		// Append total line count as "<n>L"
+		if (b) {
+			unsigned long lcount = static_cast<unsigned long>(b->Rows().size());
+			left += " ";
+			left += std::to_string(lcount);
+			left += "L";
+		}
 	}
 
 	// Build right segment (cursor and mark)

TestFrontend.cc

@@ -1,7 +1,6 @@
 #include "TestFrontend.h"
-#include "Editor.h"
 #include "Command.h"
-#include <iostream>
+#include "Editor.h"
 
 
 bool

TestInputHandler.h

@@ -4,11 +4,12 @@
 #ifndef KTE_TEST_INPUT_HANDLER_H
 #define KTE_TEST_INPUT_HANDLER_H
 
-#include "InputHandler.h"
 #include <queue>
 
+#include "InputHandler.h"
 
-class TestInputHandler : public InputHandler {
+
+class TestInputHandler final : public InputHandler {
 public:
 	TestInputHandler() = default;
 
@@ -21,7 +22,7 @@ public:
 	void QueueText(const std::string &text);
 
 
-	bool IsEmpty() const
+	[[nodiscard]] bool IsEmpty() const
 	{
 		return queue_.empty();
 	}

TestRenderer.cc

@@ -1,5 +1,4 @@
 #include "TestRenderer.h"
-#include "Editor.h"
 
 
 void

TestRenderer.h

@@ -4,11 +4,12 @@
 #ifndef KTE_TEST_RENDERER_H
 #define KTE_TEST_RENDERER_H
 
-#include "Renderer.h"
 #include <cstddef>
 
+#include "Renderer.h"
 
-class TestRenderer : public Renderer {
+
+class TestRenderer final : public Renderer {
 public:
 	TestRenderer() = default;
 
@@ -17,7 +18,7 @@ public:
 	void Draw(Editor &ed) override;
 
 
-	std::size_t GetDrawCount() const
+	[[nodiscard]] std::size_t GetDrawCount() const
 	{
 		return draw_count_;
 	}

UndoNode.h

@@ -1,8 +1,6 @@
 #ifndef KTE_UNDONODE_H
 #define KTE_UNDONODE_H
 
-#include <cstddef>
-#include <cstdint>
 #include <string>
 
 

UndoSystem.cc

@@ -16,7 +16,7 @@ UndoSystem::Begin(UndoType type)
 		if (type == UndoType::Delete) {
 			// Support batching both forward deletes (DeleteChar) and backspace (prepend case)
 			// Forward delete: cursor stays at anchor col; expected == col
-			std::size_t anchor = static_cast<std::size_t>(tree_.pending->col);
+			const auto anchor = static_cast<std::size_t>(tree_.pending->col);
 			if (anchor + tree_.pending->text.size() == static_cast<std::size_t>(col)) {
 				pending_prepend_ = false;
 				return; // keep batching forward delete

UndoSystem.h

@@ -2,8 +2,10 @@
 #define KTE_UNDOSYSTEM_H
 
 #include <string_view>
+
 #include "UndoTree.h"
 
+
 class Buffer;
 
 class UndoSystem {
@@ -39,7 +41,6 @@ private:
 
 	void update_dirty_flag();
 
-private:
 	Buffer *buf_;
 	UndoTree &tree_;
 	// Internal hint for Delete batching: whether next Append() should prepend

UndoTree.h

@@ -2,7 +2,7 @@
 #define KTE_UNDOTREE_H
 
 #include "UndoNode.h"
-#include <memory>
+
 
 struct UndoTree {
 	UndoNode *root    = nullptr; // first edit ever

cmake/Info.plist.in

@@ -6,6 +6,8 @@
     <string>en</string>
     <key>CFBundleExecutable</key>
     <string>kge</string>
+    <key>CFBundleIconFile</key>
+    <string>@MACOSX_BUNDLE_ICON_FILE@</string>
     <key>CFBundleIdentifier</key>
     <string>@KGE_BUNDLE_ID@</string>
     <key>CFBundleInfoDictionaryVersion</key>
@@ -23,4 +25,4 @@
     <key>NSHighResolutionCapable</key>
     <true/>
 </dict>
-</plist>
+</plist>

default-gui.nix

@@ -0,0 +1,51 @@
+{
+  lib,
+  stdenv,
+  cmake,
+  ncurses,
+  SDL2,
+  libGL,
+  xorg,
+  installShellFiles,
+  ...
+}:
+let
+  cmakeContent = builtins.readFile ./CMakeLists.txt;
+  cmakeLines = lib.splitString "\n" cmakeContent;
+  versionLine = lib.findFirst (l: builtins.match ".*set\\(KTE_VERSION \".+\"\\).*" l != null) (throw "KTE_VERSION not found in CMakeLists.txt") cmakeLines;
+  version = builtins.head (builtins.match ".*set\\(KTE_VERSION \"(.+)\"\\).*" versionLine);
+in
+stdenv.mkDerivation {
+  pname = "kte";
+  inherit version;
+
+  src = lib.cleanSource ./.;
+
+  nativeBuildInputs = [
+    cmake
+    ncurses
+    SDL2
+    libGL
+    xorg.libX11
+    installShellFiles
+  ];
+
+  cmakeFlags = [
+    "-DBUILD_GUI=ON"
+    "-DCMAKE_BUILD_TYPE=Debug"
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    cp kte $out/bin/
+    cp kge $out/bin/
+
+    installManPage ../docs/kte.1
+    installManPage ../docs/kge.1
+
+
+    runHook postInstall
+  '';
+}

default-nogui.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  stdenv,
+  cmake,
+  ncurses,
+  installShellFiles,
+  ...
+}:
+let
+  cmakeContent = builtins.readFile ./CMakeLists.txt;
+  cmakeLines = lib.splitString "\n" cmakeContent;
+  versionLine = lib.findFirst (l: builtins.match ".*set\\(KTE_VERSION \".+\"\\).*" l != null) (throw "KTE_VERSION not found in CMakeLists.txt") cmakeLines;
+  version = builtins.head (builtins.match ".*set\\(KTE_VERSION \"(.+)\"\\).*" versionLine);
+in
+stdenv.mkDerivation {
+  pname = "kte";
+  inherit version;
+
+  src = lib.cleanSource ./.;
+
+  nativeBuildInputs = [
+    cmake
+    ncurses
+    installShellFiles
+  ];
+
+  cmakeFlags = [
+    "-DBUILD_GUI=OFF"
+    "-DCMAKE_BUILD_TYPE=Debug"
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    cp kte $out/bin/
+
+    installManPage ../docs/kte.1
+
+    runHook postInstall
+  '';
+}

default.nix

@@ -1,24 +1,50 @@
-# default.nix
+{
+  lib,
+  stdenv,
+  cmake,
+  ncurses,
+  SDL2,
+  libGL,
+  xorg,
+  installShellFiles,
+  ...
+}:
 let
-  pkgs = import <nixpkgs> {};
+  cmakeContent = builtins.readFile ./CMakeLists.txt;
+  cmakeLines = lib.splitString "\n" cmakeContent;
+  versionLine = lib.findFirst (l: builtins.match ".*set\\(KTE_VERSION \".+\"\\).*" l != null) (throw "KTE_VERSION not found in CMakeLists.txt") cmakeLines;
+  version = builtins.head (builtins.match ".*set\\(KTE_VERSION \"(.+)\"\\).*" versionLine);
 in
-pkgs.stdenv.mkDerivation {
+stdenv.mkDerivation {
   pname = "kte";
-  version = "0.1.0";
+  inherit version;
 
-  src = ./.;
+  src = lib.cleanSource ./.;
 
-  nativeBuildInputs = [ pkgs.cmake pkgs.pkg-config ];
+  nativeBuildInputs = [
-  buildInputs = with pkgs; [
+    cmake
     ncurses
     SDL2
     libGL
     xorg.libX11
+    installShellFiles
   ];
 
   cmakeFlags = [
     "-DBUILD_GUI=ON"
-    "-DCURSES_NEED_NCURSES=TRUE"
+    "-DCMAKE_BUILD_TYPE=Debug"
-    "-DCURSES_NEED_WIDE=TRUE"
   ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    cp kte $out/bin/
+    cp kge $out/bin/
+
+    installManPage ../docs/kte.1
+    installManPage ../docs/kge.1
+
+    runHook postInstall
+  '';
 }

docs/kge.1

@@ -17,8 +17,11 @@ kge \- Kyle's Graphical Editor (GUI-first)
 is the GUI-first build target of Kyle's Text Editor. It shares the same
 editor core and command model as
 .BR kte (1),
-but defaults to the graphical ImGui frontend when available. A terminal
+and defaults to the graphical ImGui frontend when available. A terminal
-(ncurses) frontend is also available and can be requested explicitly.
+(ncurses) frontend is also available and can be requested explicitly with
+.B --term
+or by invoking
+.BR kte (1).
 
 If one or more
 .I files
@@ -199,6 +202,8 @@ Open using the terminal frontend from kge:
 .BR kte (1),
 .I docs/ke.md
 (project keybinding manual)
+.br
+Project homepage: https://github.com/wntrmute/kte
 .SH BUGS
 Report issues on the project tracker. Some behaviors are inherited from
 ke and may evolve over time; see the manual for notes.

docs/kte.1

@@ -16,8 +16,15 @@ kte \- Kyle's Text Editor (terminal-first)
 .B kte
 is a small, fast, and understandable text editor with a terminal-first
 experience. It preserves ke's WordStar/VDE-style command model with
-Emacs-influenced ergonomics. The core uses ncurses in the terminal and can
+Emacs-influenced ergonomics. The core uses ncurses in the terminal.
-optionally run with a GUI frontend if built.
+
+By default, .B kte
+runs in the terminal (ncurses) frontend. If the binary was built with GUI
+support, the same editor core can be shown with an ImGui-based GUI by passing
+.B --gui
+or by invoking the GUI-first target
+.BR kge (1)
+when available.
 
 If one or more
 .I files
@@ -194,6 +201,8 @@ Force GUI frontend (if available):
 .BR kge (1),
 .I docs/ke.md
 (project keybinding manual)
+.br
+Project homepage: https://github.com/wntrmute/kte
 .SH BUGS
 Incremental search currently restarts from the top on each invocation; see
 \(lqKnown behavior\(rq in the ke manual. Report issues on the project tracker.

flake-gui.nix

@@ -0,0 +1,55 @@
+# flake.nix
+{
+  description = "kte  ImGui/SDL2 text editor";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        packages.default = pkgs.stdenv.mkDerivation {
+          pname = "kte";
+          version = "0.1.0";
+          src = ./.;
+
+          nativeBuildInputs = [ pkgs.cmake pkgs.pkg-config ];
+          buildInputs = with pkgs; [
+            ncurses
+            SDL2
+            libGL
+            xorg.libX11
+          ];
+
+          cmakeFlags = [
+            "-DBUILD_GUI=ON"
+            "-DCURSES_NEED_NCURSES=TRUE"
+            "-DCURSES_NEED_WIDE=TRUE"
+          ];
+
+          # Alternative (even stronger): completely hide the broken module
+          preConfigure = ''
+            # If the project ships its own FindSDL2.cmake in cmake/, hide it
+            if [ -f cmake/FindSDL2.cmake ]; then
+              mv cmake/FindSDL2.cmake cmake/FindSDL2.cmake.disabled
+              echo "Disabled bundled FindSDL2.cmake"
+            fi
+          '';
+
+          meta = with pkgs.lib; {
+            description = "kte  ImGui/SDL2 GUI editor";
+            mainProgram = "kte";
+            platforms = platforms.linux;
+          };
+        };
+
+        devShells.default = pkgs.mkShell {
+          inputsFrom = [ self.packages.${system}.default ];
+          packages = with pkgs; [ gdb clang-tools ];
+        };
+      });
+}

flake.lock

@@ -1,34 +1,16 @@
 {
   "nodes": {
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1764242076,
         "narHash": "sha256-sKoIWfnijJ0+9e4wRvIgm/HgE27bzwQxcEmo2J/gNpI=",
-        "owner": "NixOS",
+        "owner": "nixos",
         "repo": "nixpkgs",
         "rev": "2fad6eac6077f03fe109c4d4eb171cf96791faa4",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
+        "owner": "nixos",
         "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
@@ -36,24 +18,8 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",

flake.nix

@@ -1,55 +1,21 @@
-# flake.nix
 {
-  description = "kte  ImGui/SDL2 text editor";
+  description = "Kyle's Text Editor";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
-    flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs =
-    flake-utils.lib.eachDefaultSystem (system:
+    { self, nixpkgs }:
-      let
+    let
-        pkgs = nixpkgs.legacyPackages.${system};
+      pkgs = import nixpkgs { system = "x86_64-linux"; };
-      in {
+    in
-        packages.default = pkgs.stdenv.mkDerivation {
+    {
-          pname = "kte";
+      packages.x86_64-linux = {
-          version = "0.1.0";
+        default = pkgs.callPackage ./default-nogui.nix { };
-          src = ./.;
+        kge     = pkgs.callPackage ./default-gui.nix   { };
-
+        kte     = pkgs.callPackage ./default-nogui.nix { };
-          nativeBuildInputs = [ pkgs.cmake pkgs.pkg-config ];
+        full    = pkgs.callPackage ./default.nix       { };
-          buildInputs = with pkgs; [
+      };
-            ncurses
+    };
-            SDL2
+}
-            libGL
-            xorg.libX11
-          ];
-
-          cmakeFlags = [
-            "-DBUILD_GUI=ON"
-            "-DCURSES_NEED_NCURSES=TRUE"
-            "-DCURSES_NEED_WIDE=TRUE"
-          ];
-
-          # Alternative (even stronger): completely hide the broken module
-          preConfigure = ''
-            # If the project ships its own FindSDL2.cmake in cmake/, hide it
-            if [ -f cmake/FindSDL2.cmake ]; then
-              mv cmake/FindSDL2.cmake cmake/FindSDL2.cmake.disabled
-              echo "Disabled bundled FindSDL2.cmake"
-            fi
-          '';
-
-          meta = with pkgs.lib; {
-            description = "kte  ImGui/SDL2 GUI editor";
-            mainProgram = "kte";
-            platforms = platforms.linux;
-          };
-        };
-
-        devShells.default = pkgs.mkShell {
-          inputsFrom = [ self.packages.${system}.default ];
-          packages = with pkgs; [ gdb clang-tools ];
-        };
-      });
-}

main.cc

@@ -1,17 +1,18 @@
+#include <cctype>
+#include <cstdio>
+#include <getopt.h>
 #include <iostream>
 #include <memory>
-#include <string>
-#include <cctype>
-#include <unistd.h>
-#include <getopt.h>
 #include <signal.h>
-#include <cstdio>
+#include <string>
+#include <unistd.h>
 #include <sys/stat.h>
 
-#include "Editor.h"
 #include "Command.h"
+#include "Editor.h"
 #include "Frontend.h"
 #include "TerminalFrontend.h"
+
 #if defined(KTE_BUILD_GUI)
 #include "GUIFrontend.h"
 #endif
@@ -21,6 +22,7 @@
 #  define KTE_VERSION_STR "devel"
 #endif
 
+
 static void
 PrintUsage(const char *prog)
 {
@@ -33,109 +35,6 @@ PrintUsage(const char *prog)
 }
 
 
-#if defined(KTE_BUILD_GUI)
-// Detach the process from the controlling terminal when running the GUI so the
-// launching terminal can be closed. This mirrors typical GUI app behavior on
-// POSIX systems.
-static void
-DetachFromTerminalIfGUI(bool use_gui)
-{
-#if defined(__APPLE__) || defined(__linux__) || defined(__unix__)
-	if (!use_gui)
-		return;
-
-	// Ignore SIGHUP so closing the terminal won't terminate us.
-	signal(SIGHUP, SIG_IGN);
-
-	// Helper: redirect stdio to /dev/null and optionally close extra FDs.
-	auto redirect_stdio_and_close = []() {
-		// Reset file mode creation mask and working directory to a safe default
-		umask(0);
-		chdir("/");
-
-		FILE *fnull_r = fopen("/dev/null", "r");
-		if (fnull_r) {
-			dup2(fileno(fnull_r), STDIN_FILENO);
-		}
-		FILE *fnull_w = fopen("/dev/null", "w");
-		if (fnull_w) {
-			dup2(fileno(fnull_w), STDOUT_FILENO);
-			dup2(fileno(fnull_w), STDERR_FILENO);
-		}
-
-		// Close any other inherited FDs to avoid keeping terminal/pty or pipes open
-		long max_fd = sysconf(_SC_OPEN_MAX);
-		if (max_fd < 0)
-			max_fd = 256; // conservative fallback
-		for (long fd = 3; fd < max_fd; ++fd) {
-			close(static_cast<int>(fd));
-		}
-	};
-
-#if defined(__APPLE__)
-	// macOS: daemon(3) is deprecated and treated as an error with -Werror.
-	// Use double-fork + setsid and redirect stdio to /dev/null.
-	pid_t pid = fork();
-	if (pid < 0) {
-		return;
-	}
-
-	if (pid > 0) {
-		_exit(0);
-	}
-
-	if (setsid() < 0) {
-		return;
-	}
-
-	pid_t pid2 = fork();
-	if (pid2 < 0) {
-		return;
-	}
-
-	if (pid2 > 0) {
-		_exit(0);
-	}
-
-	redirect_stdio_and_close();
-#else
-	// Prefer daemon(3) on non-Apple POSIX; fall back to manual detach if it fails.
-	if (daemon(0, 0) == 0) {
-		redirect_stdio_and_close();
-		return;
-	}
-
-	pid_t pid = fork();
-	if (pid < 0) {
-		return;
-	}
-
-	if (pid > 0) {
-		_exit(0);
-	}
-
-	if (setsid() < 0) {
-		// bogus check
-	}
-
-	pid_t pid2 = fork();
-	if (pid2 < 0) {
-		return;
-	}
-
-	if (pid2 > 0) {
-		_exit(0);
-	}
-
-	redirect_stdio_and_close();
-#endif
-#else
-	(void) use_gui;
-#endif
-}
-#endif
-
-
 int
 main(int argc, const char *argv[])
 {
@@ -157,7 +56,7 @@ main(int argc, const char *argv[])
 
 	int opt;
 	int long_index = 0;
-	while ((opt = getopt_long(argc, const_cast<char * const*>(argv), "gthV", long_opts, &long_index)) != -1) {
+	while ((opt = getopt_long(argc, const_cast<char *const *>(argv), "gthV", long_opts, &long_index)) != -1) {
 		switch (opt) {
 		case 'g':
 			req_gui = true;
@@ -212,8 +111,6 @@ main(int argc, const char *argv[])
 		use_gui = false;
 #endif
 	}
-	// If using GUI, detach from the controlling terminal so the terminal can be closed.
-	DetachFromTerminalIfGUI(use_gui);
 #endif
 
 	// Open files passed on the CLI; support +N to jump to line N in the next file.
@@ -293,6 +190,15 @@ main(int argc, const char *argv[])
 		fe = std::make_unique<TerminalFrontend>();
 	}
 
+#if defined(KTE_BUILD_GUI) && defined(__APPLE__)
+	if (use_gui) {
+		/* likely using the .app, so need to cd */
+		if (chdir(getenv("HOME")) != 0) {
+			std::cerr << "kge.app: failed to chdir to HOME" << std::endl;
+		}
+	}
+#endif
+
 	if (!fe->Init(editor)) {
 		std::cerr << "kte: failed to initialize frontend" << std::endl;
 		return 1;

test_undo.cc

@@ -1,10 +1,11 @@
-#include <iostream>
 #include <cassert>
 #include <fstream>
+#include <iostream>
+
+#include "Buffer.h"
+#include "Command.h"
 #include "Editor.h"
 #include "TestFrontend.h"
-#include "Command.h"
-#include "Buffer.h"
 
 
 int