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kte/themes/Leuchtturm.h
Kyle Isom 8712ea673d Add leuchtturm theme, font zoom, syntax palette fixes 
Themes:
- Add leuchtturm theme (fountain pen ink on cream paper, brass/leather dark)
- Add per-theme syntax palettes for leuchtturm, tufte, and everforest
- Fix static inline globals giving each TU its own copy of gCurrentTheme
  and gBackgroundMode (changed to inline for proper C++17 linkage)
- :background with no args now shows current mode

Font zoom:
- CMD-=/CMD--/CMD-0 to increase/decrease/reset font size

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-24 21:17:55 -07:00

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// themes/Leuchtturm.h — Fountain pen on cream paper, brass and leather (header-only)
// Inspired by Kaweco Brass/Bronze Sport pens on Leuchtturm1917 notebook paper.
// Light: warm cream paper with blue-black fountain pen ink.
// Dark: leather case and patinated metal.
#pragma once
#include "ThemeHelpers.h"
static inline void
ApplyLeuchtturmLightTheme()
{
// Notebook paper and fountain pen ink
const ImVec4 paper = RGBA(0xF2ECDF); // Leuchtturm cream paper
const ImVec4 bg1 = RGBA(0xE8E2D5); // slightly darker cream
const ImVec4 bg2 = RGBA(0xDDD7CA); // UI elements
const ImVec4 bg3 = RGBA(0xD1CBBD); // hover/active
const ImVec4 ink = RGBA(0x040720); // blue-black fountain pen ink
const ImVec4 dim = RGBA(0x7A756A); // faded text (like printed headers)
const ImVec4 border = RGBA(0xCCC6B4); // faint ruled lines
// Metal accents from the pens
const ImVec4 brass = RGBA(0x6B5E2A); // dark patinated brass
const ImVec4 brown = RGBA(0x5C3D28); // leather/bronze
ImGuiStyle &style = ImGui::GetStyle();
style.WindowPadding = ImVec2(8.0f, 8.0f);
style.FramePadding = ImVec2(6.0f, 4.0f);
style.CellPadding = ImVec2(6.0f, 4.0f);
style.ItemSpacing = ImVec2(6.0f, 6.0f);
style.ItemInnerSpacing = ImVec2(6.0f, 4.0f);
style.ScrollbarSize = 12.0f;
style.GrabMinSize = 10.0f;
style.WindowRounding = 0.0f;
style.FrameRounding = 0.0f;
style.PopupRounding = 0.0f;
style.GrabRounding = 0.0f;
style.TabRounding = 0.0f;
style.WindowBorderSize = 1.0f;
style.FrameBorderSize = 0.0f;
ImVec4 *colors = style.Colors;
colors[ImGuiCol_Text] = ink;
colors[ImGuiCol_TextDisabled] = dim;
colors[ImGuiCol_WindowBg] = paper;
colors[ImGuiCol_ChildBg] = paper;
colors[ImGuiCol_PopupBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.98f);
colors[ImGuiCol_Border] = border;
colors[ImGuiCol_BorderShadow] = RGBA(0x000000, 0.0f);
colors[ImGuiCol_FrameBg] = bg2;
colors[ImGuiCol_FrameBgHovered] = bg3;
colors[ImGuiCol_FrameBgActive] = bg1;
colors[ImGuiCol_TitleBg] = bg1;
colors[ImGuiCol_TitleBgActive] = bg2;
colors[ImGuiCol_TitleBgCollapsed] = bg1;
colors[ImGuiCol_MenuBarBg] = bg1;
colors[ImGuiCol_ScrollbarBg] = paper;
colors[ImGuiCol_ScrollbarGrab] = bg3;
colors[ImGuiCol_ScrollbarGrabHovered] = bg2;
colors[ImGuiCol_ScrollbarGrabActive] = border;
colors[ImGuiCol_CheckMark] = ink;
colors[ImGuiCol_SliderGrab] = ink;
colors[ImGuiCol_SliderGrabActive] = brass;
colors[ImGuiCol_Button] = bg2;
colors[ImGuiCol_ButtonHovered] = bg3;
colors[ImGuiCol_ButtonActive] = bg1;
colors[ImGuiCol_Header] = bg2;
colors[ImGuiCol_HeaderHovered] = bg3;
colors[ImGuiCol_HeaderActive] = bg3;
colors[ImGuiCol_Separator] = border;
colors[ImGuiCol_SeparatorHovered] = bg3;
colors[ImGuiCol_SeparatorActive] = brass;
colors[ImGuiCol_ResizeGrip] = ImVec4(ink.x, ink.y, ink.z, 0.10f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(brass.x, brass.y, brass.z, 0.50f);
colors[ImGuiCol_ResizeGripActive] = brass;
colors[ImGuiCol_Tab] = bg2;
colors[ImGuiCol_TabHovered] = bg1;
colors[ImGuiCol_TabActive] = bg3;
colors[ImGuiCol_TabUnfocused] = bg2;
colors[ImGuiCol_TabUnfocusedActive] = bg3;
colors[ImGuiCol_TableHeaderBg] = bg2;
colors[ImGuiCol_TableBorderStrong] = border;
colors[ImGuiCol_TableBorderLight] = ImVec4(border.x, border.y, border.z, 0.5f);
colors[ImGuiCol_TableRowBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.0f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(bg1.x, bg1.y, bg1.z, 0.30f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(brass.x, brass.y, brass.z, 0.18f);
colors[ImGuiCol_DragDropTarget] = brass;
colors[ImGuiCol_NavHighlight] = brass;
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(ink.x, ink.y, ink.z, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.15f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.15f);
colors[ImGuiCol_PlotLines] = brown;
colors[ImGuiCol_PlotLinesHovered] = brass;
colors[ImGuiCol_PlotHistogram] = brown;
colors[ImGuiCol_PlotHistogramHovered] = brass;
}
// Dark variant — leather pen case with warm metal and cream accents
static inline void
ApplyLeuchtturmDarkTheme()
{
const ImVec4 bg0 = RGBA(0x1C1610); // dark leather
const ImVec4 bg1 = RGBA(0x251E16); // slightly lighter
const ImVec4 bg2 = RGBA(0x30281E); // UI elements
const ImVec4 bg3 = RGBA(0x3E3428); // hover/active
const ImVec4 ink = RGBA(0xE5DDD0); // warm cream text
const ImVec4 dim = RGBA(0x978E7C); // secondary text
const ImVec4 border = RGBA(0x4A3E30); // subtle borders
const ImVec4 brass = RGBA(0xB8A060); // polished brass
const ImVec4 brown = RGBA(0x8B6848); // bronze pen
ImGuiStyle &style = ImGui::GetStyle();
style.WindowPadding = ImVec2(8.0f, 8.0f);
style.FramePadding = ImVec2(6.0f, 4.0f);
style.CellPadding = ImVec2(6.0f, 4.0f);
style.ItemSpacing = ImVec2(6.0f, 6.0f);
style.ItemInnerSpacing = ImVec2(6.0f, 4.0f);
style.ScrollbarSize = 12.0f;
style.GrabMinSize = 10.0f;
style.WindowRounding = 0.0f;
style.FrameRounding = 0.0f;
style.PopupRounding = 0.0f;
style.GrabRounding = 0.0f;
style.TabRounding = 0.0f;
style.WindowBorderSize = 1.0f;
style.FrameBorderSize = 0.0f;
ImVec4 *colors = style.Colors;
colors[ImGuiCol_Text] = ink;
colors[ImGuiCol_TextDisabled] = dim;
colors[ImGuiCol_WindowBg] = bg0;
colors[ImGuiCol_ChildBg] = bg0;
colors[ImGuiCol_PopupBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.98f);
colors[ImGuiCol_Border] = border;
colors[ImGuiCol_BorderShadow] = RGBA(0x000000, 0.0f);
colors[ImGuiCol_FrameBg] = bg2;
colors[ImGuiCol_FrameBgHovered] = bg3;
colors[ImGuiCol_FrameBgActive] = bg1;
colors[ImGuiCol_TitleBg] = bg1;
colors[ImGuiCol_TitleBgActive] = bg2;
colors[ImGuiCol_TitleBgCollapsed] = bg1;
colors[ImGuiCol_MenuBarBg] = bg1;
colors[ImGuiCol_ScrollbarBg] = bg0;
colors[ImGuiCol_ScrollbarGrab] = bg3;
colors[ImGuiCol_ScrollbarGrabHovered] = border;
colors[ImGuiCol_ScrollbarGrabActive] = dim;
colors[ImGuiCol_CheckMark] = brass;
colors[ImGuiCol_SliderGrab] = brass;
colors[ImGuiCol_SliderGrabActive] = brown;
colors[ImGuiCol_Button] = bg2;
colors[ImGuiCol_ButtonHovered] = bg3;
colors[ImGuiCol_ButtonActive] = bg1;
colors[ImGuiCol_Header] = bg2;
colors[ImGuiCol_HeaderHovered] = bg3;
colors[ImGuiCol_HeaderActive] = bg3;
colors[ImGuiCol_Separator] = border;
colors[ImGuiCol_SeparatorHovered] = bg3;
colors[ImGuiCol_SeparatorActive] = brass;
colors[ImGuiCol_ResizeGrip] = ImVec4(ink.x, ink.y, ink.z, 0.10f);
colors[ImGuiCol_ResizeGripHovered] = ImVec4(brass.x, brass.y, brass.z, 0.50f);
colors[ImGuiCol_ResizeGripActive] = brass;
colors[ImGuiCol_Tab] = bg2;
colors[ImGuiCol_TabHovered] = bg1;
colors[ImGuiCol_TabActive] = bg3;
colors[ImGuiCol_TabUnfocused] = bg2;
colors[ImGuiCol_TabUnfocusedActive] = bg3;
colors[ImGuiCol_TableHeaderBg] = bg2;
colors[ImGuiCol_TableBorderStrong] = border;
colors[ImGuiCol_TableBorderLight] = ImVec4(border.x, border.y, border.z, 0.5f);
colors[ImGuiCol_TableRowBg] = ImVec4(bg1.x, bg1.y, bg1.z, 0.0f);
colors[ImGuiCol_TableRowBgAlt] = ImVec4(bg1.x, bg1.y, bg1.z, 0.30f);
colors[ImGuiCol_TextSelectedBg] = ImVec4(brass.x, brass.y, brass.z, 0.22f);
colors[ImGuiCol_DragDropTarget] = brass;
colors[ImGuiCol_NavHighlight] = brass;
colors[ImGuiCol_NavWindowingHighlight] = ImVec4(ink.x, ink.y, ink.z, 0.70f);
colors[ImGuiCol_NavWindowingDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.35f);
colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.0f, 0.0f, 0.0f, 0.35f);
colors[ImGuiCol_PlotLines] = brass;
colors[ImGuiCol_PlotLinesHovered] = brown;
colors[ImGuiCol_PlotHistogram] = brass;
colors[ImGuiCol_PlotHistogramHovered] = brown;
}
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