Fix void crash in kge.

.idea/workspace.xml

@@ -34,8 +34,9 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="e1fe3ab0-3650-4fca-8664-a247d5dfa457" name="Changes" comment="Actually add the screenshot.">
-      <change beforePath="$PROJECT_DIR$/.github/workflows/release.yml" beforeDir="false" afterPath="$PROJECT_DIR$/.github/workflows/release.yml" afterDir="false" />
       <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="$PROJECT_DIR$/GUIRenderer.cc" beforeDir="false" afterPath="$PROJECT_DIR$/GUIRenderer.cc" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -128,9 +129,9 @@
     </key>
   </component>
   <component name="RunManager" selected="CMake Application.kge">
-    <configuration default="true" type="CLionExternalRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true">
+    <configuration default="true" type="CMakeRunConfiguration" factoryName="Application" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true">
       <method v="2">
-        <option name="CLION.EXTERNAL.BUILD" enabled="true" />
+        <option name="com.jetbrains.cidr.execution.CidrBuildBeforeRunTaskProvider$BuildBeforeRunTask" 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">
@@ -169,7 +170,7 @@
       <workItem from="1764539556448" duration="156000" />
       <workItem from="1764539725338" duration="1075000" />
       <workItem from="1764542392763" duration="3512000" />
-      <workItem from="1764548345516" duration="9962000" />
+      <workItem from="1764548345516" duration="12773000" />
     </task>
     <task id="LOCAL-00001" summary="Add undo/redo infrastructure and buffer management additions.">
       <option name="closed" value="true" />

CMakeLists.txt

@@ -4,7 +4,7 @@ project(kte)
 include(GNUInstallDirs)
 
 set(CMAKE_CXX_STANDARD 17)
-set(KTE_VERSION "1.0.3")
+set(KTE_VERSION "1.0.4")
 
 # Default to terminal-only build to avoid SDL/OpenGL dependency by default.
 # Enable with -DBUILD_GUI=ON when SDL2/OpenGL/Freetype are available.
@@ -201,5 +201,5 @@ if (${BUILD_GUI})
     endif ()
     # Install kge man page only when GUI is built
     install(FILES docs/kge.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
-    install(FILES kge.png    DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons)
+    install(FILES kge.png DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons)
 endif ()

GUIRenderer.cc

@@ -151,14 +151,14 @@ GUIRenderer::Draw(Editor &ed)
 				}
 			}
 		}
-		// Handle mouse click before rendering to avoid dependent on drawn items
+  // Handle mouse click before rendering to avoid dependent on drawn items
-		if (ImGui::IsWindowHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
+  if (ImGui::IsWindowHovered() && ImGui::IsMouseClicked(ImGuiMouseButton_Left)) {
-			ImVec2 mp = ImGui::GetIO().MousePos;
+      ImVec2 mp = ImGui::GetIO().MousePos;
-			// Compute viewport-relative row so (0) is top row of the visible area
+      // Compute viewport-relative row so (0) is top row of the visible area
-			float vy_f = (mp.y - list_origin.y - scroll_y) / row_h;
+      float vy_f = (mp.y - list_origin.y - scroll_y) / row_h;
-			long vy    = static_cast<long>(vy_f);
+      long vy    = static_cast<long>(vy_f);
-			if (vy < 0)
+      if (vy < 0)
-				vy = 0;
+          vy = 0;
 
 			// Clamp vy within visible content height to avoid huge jumps
 			ImVec2 cr_min = ImGui::GetWindowContentRegionMin();
@@ -170,70 +170,75 @@ GUIRenderer::Draw(Editor &ed)
 			if (vy >= vis_rows)
 				vy = vis_rows - 1;
 
-			// Translate viewport row to buffer row using Buffer::Rowoffs
+            // Translate viewport row to buffer row using Buffer::Rowoffs
-			std::size_t by = buf->Rowoffs() + static_cast<std::size_t>(vy);
+            std::size_t by = buf->Rowoffs() + static_cast<std::size_t>(vy);
-			if (by >= lines.size()) {
+            if (by >= lines.size()) {
-				if (!lines.empty())
+                if (!lines.empty())
-					by = lines.size() - 1;
+                    by = lines.size() - 1;
-				else
+                else
-					by = 0;
+                    by = 0;
-			}
+            }
 
-			// Compute desired pixel X inside the viewport content (subtract horizontal scroll)
+            // Compute desired pixel X inside the viewport content (subtract horizontal scroll)
-			float px = (mp.x - list_origin.x - scroll_x);
+            float px = (mp.x - list_origin.x - scroll_x);
-			if (px < 0.0f)
+            if (px < 0.0f)
-				px = 0.0f;
+                px = 0.0f;
 
-			// Convert pixel X to a render-column target including horizontal col offset
+            // Empty buffer guard: if there are no lines yet, just move to 0:0
-			// Use our own tab expansion of width 8 to match command layer logic.
+            if (lines.empty()) {
-			const std::string &line_clicked = lines[by];
+                Execute(ed, CommandId::MoveCursorTo, std::string("0:0"));
-			const std::size_t tabw          = 8;
+            } else {
-			// We iterate source columns computing absolute rendered column (rx_abs) from 0,
+                // Convert pixel X to a render-column target including horizontal col offset
-			// then translate to viewport-space by subtracting Coloffs.
+                // Use our own tab expansion of width 8 to match command layer logic.
-			std::size_t coloffs = buf->Coloffs();
+                const std::string &line_clicked = lines[by];
-			std::size_t rx_abs  = 0; // absolute rendered column
+                const std::size_t tabw          = 8;
-			std::size_t i       = 0; // source column iterator
+                // 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
+                // Fast-forward i until rx_abs >= coloffs to align with leftmost visible column
-			if (!line_clicked.empty() && coloffs > 0) {
+                if (!line_clicked.empty() && coloffs > 0) {
-				while (i < line_clicked.size() && rx_abs < coloffs) {
+                    while (i < line_clicked.size() && rx_abs < coloffs) {
-					if (line_clicked[i] == '\t') {
+                        if (line_clicked[i] == '\t') {
-						rx_abs += (tabw - (rx_abs % tabw));
+                            rx_abs += (tabw - (rx_abs % tabw));
-					} else {
+                        } else {
-						rx_abs += 1;
+                            rx_abs += 1;
-					}
+                        }
-					++i;
+                        ++i;
-				}
+                    }
-			}
+                }
 
-			// Now search for closest source column to clicked px within/after viewport
+                // Now search for closest source column to clicked px within/after viewport
-			std::size_t best_col = i; // default to first visible column
+                std::size_t best_col = i; // default to first visible column
-			float best_dist      = std::numeric_limits<float>::infinity();
+                float best_dist      = std::numeric_limits<float>::infinity();
-			while (true) {
+                while (true) {
-				// For i in [current..size], evaluate candidate including the implicit end position
+                    // For i in [current..size], evaluate candidate including the implicit end position
-				std::size_t rx_view = (rx_abs >= coloffs) ? (rx_abs - coloffs) : 0;
+                    std::size_t rx_view = (rx_abs >= coloffs) ? (rx_abs - coloffs) : 0;
-				float rx_px         = static_cast<float>(rx_view) * space_w;
+                    float rx_px         = static_cast<float>(rx_view) * space_w;
-				float dist          = std::fabs(px - rx_px);
+                    float dist          = std::fabs(px - rx_px);
-				if (dist <= best_dist) {
+                    if (dist <= best_dist) {
-					best_dist = dist;
+                        best_dist = dist;
-					best_col  = i;
+                        best_col  = i;
-				}
+                    }
-				if (i == line_clicked.size())
+                    if (i == line_clicked.size())
-					break;
+                        break;
-				// advance to next source column
+                    // advance to next source column
-				if (line_clicked[i] == '\t') {
+                    if (line_clicked[i] == '\t') {
-					rx_abs += (tabw - (rx_abs % tabw));
+                        rx_abs += (tabw - (rx_abs % tabw));
-				} else {
+                    } else {
-					rx_abs += 1;
+                        rx_abs += 1;
-				}
+                    }
-				++i;
+                    ++i;
-			}
+                }
 
-			// Dispatch absolute buffer coordinates (row:col)
+                // Dispatch absolute buffer coordinates (row:col)
-			char tmp[64];
+                char tmp[64];
-			std::snprintf(tmp, sizeof(tmp), "%zu:%zu", by, best_col);
+                std::snprintf(tmp, sizeof(tmp), "%zu:%zu", by, best_col);
-			Execute(ed, CommandId::MoveCursorTo, std::string(tmp));
+                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) {