diff --git a/build.sh b/build.sh index 0e1fcf2..b456994 100755 --- a/build.sh +++ b/build.sh @@ -96,6 +96,19 @@ zig build-obj \ mv nexshell.o "$BUILD_DIR/nexshell.o" echo " → $BUILD_DIR/nexshell.o" +# Compile UI (Zicroui) +echo "[1.2/8] Compiling UI (Zicroui)..." +zig build-obj \ + -target $ZIG_TARGET \ + $ZIG_OBJ_FLAGS \ + -O ReleaseFast \ + -I"$RUMPK_DIR/libs/microui" \ + "$RUMPK_DIR/hal/ui.zig" \ + --name ui + +mv ui.o "$BUILD_DIR/ui.o" +echo " → $BUILD_DIR/ui.o" + # ========================================================= # Step 2: Compile context switch assembly # ========================================================= @@ -122,6 +135,22 @@ zig cc \ -o "$BUILD_DIR/monocypher.o" echo " → $BUILD_DIR/monocypher.o" +# ========================================================= +# Step 2.1b: Compile Microui +# ========================================================= +echo "[2.1b/8] Compiling Microui..." +zig cc \ + -target $ZIG_TARGET \ + $ARCH_FLAGS \ + -ffreestanding \ + -fno-stack-protector \ + -fno-builtin \ + -O3 \ + -I"$RUMPK_DIR/libs/microui/include" \ + -c "$RUMPK_DIR/libs/microui/microui.c" \ + -o "$BUILD_DIR/microui.o" +echo " → $BUILD_DIR/microui.o" + # ========================================================= # Step 2.2: Compile LwIP (Kernel Stack) # ========================================================= @@ -515,6 +544,8 @@ $LINKER \ "$BUILD_DIR/overrides.o" \ "$BUILD_DIR/loader.o" \ "$BUILD_DIR/nexshell.o" \ + "$BUILD_DIR/ui.o" \ + "$BUILD_DIR/microui.o" \ $NIM_OBJS \ -o "$BUILD_DIR/rumpk-$ARCH.elf" diff --git a/build.zig b/build.zig index 0bc7c20..819cbf4 100644 --- a/build.zig +++ b/build.zig @@ -23,6 +23,13 @@ pub fn build(b: *std.Build) void { hal.root_module.red_zone = false; hal.root_module.stack_check = .none; + // Microui Integration (Phase 3.5b) + hal.addIncludePath(b.path("libs/microui")); + hal.addCSourceFile(.{ + .file = b.path("libs/microui/microui.c"), + .flags = &.{"-std=c99"}, + }); + b.installArtifact(hal); // ========================================================= diff --git a/core/cstubs.c b/core/cstubs.c index bbc03f6..079a867 100644 --- a/core/cstubs.c +++ b/core/cstubs.c @@ -140,6 +140,49 @@ int fprintf(void *stream, const char *format, ...) { return printf(format); } +int vsnprintf(char *str, size_t size, const char *format, va_list args) { + size_t count = 0; + if (size == 0) return 0; + + while (*format && count < size - 1) { + if (*format == '%' && *(format + 1)) { + format++; + if (*format == 's') { + char *s = va_arg(args, char *); + if (s) { + while (*s && count < size - 1) { + str[count++] = *s++; + } + } + } else if (*format == 'd' || *format == 'i') { + int d = va_arg(args, int); + char buf[16]; + itoa(d, buf); + char *b = buf; + while (*b && count < size - 1) { + str[count++] = *b++; + } + } else { + str[count++] = '%'; + if (count < size - 1) str[count++] = *format; + } + } else { + str[count++] = *format; + } + format++; + } + str[count] = '\0'; + return count; +} + +int snprintf(char *str, size_t size, const char *format, ...) { + va_list args; + va_start(args, format); + int ret = vsnprintf(str, size, format, args); + va_end(args); + return ret; +} + int fflush(void *stream) { return 0; } @@ -183,5 +226,44 @@ int atoi(const char *nptr) { return res; } +int sprintf(char *str, const char *format, ...) { + va_list args; + va_start(args, format); + // Unsafe sprintf limit + int ret = vsnprintf(str, 2048, format, args); + va_end(args); + return ret; +} + +double strtod(const char *nptr, char **endptr) { + if (endptr) *endptr = (char*)nptr + strlen(nptr); // Fake endptr + return (double)atoi(nptr); +} + +// qsort uses existing memcpy + +void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *)) { + // Bubble sort for simplicity (O(n^2)) + if (nmemb < 2) return; + char *b = (char *)base; + char tmp[256]; // Max item size 256 bytes for swap + // Verify size? If size > 256, we fail or use loop. + // mu_Container* is pointer size (8). + + for (size_t i = 0; i < nmemb - 1; i++) { + for (size_t j = 0; j < nmemb - i - 1; j++) { + char *p1 = b + j * size; + char *p2 = b + (j + 1) * size; + if (compar(p1, p2) > 0) { + // Swap + if (size <= 256) { + memcpy(tmp, p1, size); + memcpy(p1, p2, size); + memcpy(p2, tmp, size); + } + } + } + } +} int errno = 0; diff --git a/core/kernel.nim b/core/kernel.nim index 342de72..c4e22cc 100644 --- a/core/kernel.nim +++ b/core/kernel.nim @@ -17,6 +17,7 @@ var pause_start*: uint64 = 0 var fiber_ion: FiberObject var fiber_nexshell: FiberObject +var fiber_ui: FiberObject var fiber_subject: FiberObject var fiber_watchdog: FiberObject @@ -96,6 +97,8 @@ proc rumpk_yield_internal() {.cdecl, exportc.} = if current_fiber == addr fiber_ion: switch(addr fiber_nexshell) elif current_fiber == addr fiber_nexshell: + switch(addr fiber_ui) + elif current_fiber == addr fiber_ui: switch(addr fiber_subject) elif current_fiber == addr fiber_subject: switch(addr fiber_watchdog) @@ -139,9 +142,12 @@ proc nimPanic(msg: cstring) {.exportc: "panic", cdecl, noreturn.} = var stack_ion: array[32768, uint8] var stack_nexshell: array[32768, uint8] +var stack_ui: array[32768, uint8] var stack_subject: array[65536, uint8] var stack_watchdog: array[4096, uint8] +proc ui_fiber_entry() {.importc, cdecl.} + proc subject_fiber_entry() {.cdecl.} = launch_subject() @@ -244,11 +250,14 @@ proc kmain() {.exportc, cdecl.} = # 2. NEXSHELL FIBER (The Brain) init_fiber(addr fiber_nexshell, nexshell_main, addr stack_nexshell[0], sizeof(stack_nexshell)) - # 3. SUBJECT FIBER (The Payload) + # 3. UI FIBER (The Face) + init_fiber(addr fiber_ui, ui_fiber_entry, addr stack_ui[0], sizeof(stack_ui)) + + # 4. SUBJECT FIBER (The Payload) init_fiber(addr fiber_subject, subject_fiber_entry, addr stack_subject[0], sizeof(stack_subject)) - # 4. WATCHDOG FIBER (The Immune System) + # 5. WATCHDOG FIBER (The Immune System) init_fiber(addr fiber_watchdog, watchdog_loop, addr stack_watchdog[0], sizeof(stack_watchdog)) # [FIX] GLOBAL INTERRUPT ENABLE diff --git a/hal/framebuffer.zig b/hal/framebuffer.zig new file mode 100644 index 0000000..91b9ce5 --- /dev/null +++ b/hal/framebuffer.zig @@ -0,0 +1,27 @@ +const std = @import("std"); + +pub const Rect = struct { + x: i32, + y: i32, + w: i32, + h: i32, +}; + +pub fn init() void { + // TODO: Init VirtIO GPU or PL111 +} + +pub fn set_clip(r: Rect) void { + // TODO: Set scissoring + _ = r; +} + +pub fn fill_rect(x: i32, y: i32, w: i32, h: i32, color: u32) void { + // TODO: Plot to framebuffer + // For now, valid compilation is the goal. + _ = x; + _ = y; + _ = w; + _ = h; + _ = color; +} diff --git a/hal/ui.zig b/hal/ui.zig new file mode 100644 index 0000000..e009e1b --- /dev/null +++ b/hal/ui.zig @@ -0,0 +1,128 @@ +const std = @import("std"); +const fb = @import("framebuffer.zig"); + +// Import the C Logic directly +pub const c = @cImport({ + @cInclude("microui.h"); +}); + +// --- STATIC MEMORY --- +var ctx: c.mu_Context = undefined; + +// --- FONT (The "8-bit" classic) --- +// Minimal placeholder font (0-127 ascii) - 1KB +const font_bitmap: [128][8]u8 = [_][8]u8{[_]u8{0xFF} ** 8} ** 128; // Blocks for now + +// --- CALL BACKS --- +fn text_width_cb(font: ?*anyopaque, str: [*c]const u8, len: c_int) callconv(.c) c_int { + _ = font; + // assuming 8x8 monospaced + + // If len is -1, treat as null terminated + var l = len; + if (l == -1 and str != null) { + l = 0; + var s = str; + while (s[0] != 0) { + l += 1; + s += 1; + } + } + return l * 8; +} + +fn text_height_cb(font: ?*anyopaque) callconv(.c) c_int { + _ = font; + return 8; +} + +// --- THE RENDERER (The Paint Brush) --- +pub fn render() void { + var cmd: [*c]c.mu_Command = null; + + // Iterate over microui command list + // Note: mu_next_command takes pointers + while (c.mu_next_command(&ctx, &cmd) != 0) { + switch (cmd.*.type) { + c.MU_COMMAND_TEXT => { + // draw_text(cmd.text.str, cmd.text.pos, cmd.text.color); + // For now, ignore text drawing to avoid font complexity in step 1 + }, + c.MU_COMMAND_RECT => { + draw_rect(cmd.*.rect.rect, cmd.*.rect.color); + }, + c.MU_COMMAND_ICON => { + // TODO: Draw simple icons (close button X) + draw_rect(cmd.*.icon.rect, cmd.*.icon.color); // Placeholder + }, + c.MU_COMMAND_CLIP => { + // fb.set_clip(cmd.clip.rect); + // Adaptation needed for C to Zig struct + fb.set_clip(.{ + .x = cmd.*.clip.rect.x, + .y = cmd.*.clip.rect.y, + .w = cmd.*.clip.rect.w, + .h = cmd.*.clip.rect.h, + }); + }, + else => {}, + } + } +} + +// --- HELPER: Draw Rect --- +fn draw_rect(r: c.mu_Rect, color: c.mu_Color) void { + // Convert microui Color to ARGB + const argb = (@as(u32, 255) << 24) | + (@as(u32, color.r) << 16) | + (@as(u32, color.g) << 8) | + @as(u32, color.b); + + // Plot to L0 Framebuffer + fb.fill_rect(r.x, r.y, r.w, r.h, argb); +} + +// --- INITIALIZATION --- +pub fn init() void { + c.mu_init(&ctx); + // Hook up text width callback (Required by microui) + ctx.text_width = text_width_cb; + ctx.text_height = text_height_cb; +} + +// --- KERNEL IMPORTS --- +extern fn fiber_yield() void; + +// --- THE UI LOOP (Fiber Entry) --- +export fn ui_fiber_entry() void { + init(); + + while (true) { + // 1. Begin Frame + c.mu_begin(&ctx); + + // 2. Define Layout (The Logic) + if (c.mu_begin_window(&ctx, "Nexus HUD", c.mu_rect(10, 10, 300, 200)) != 0) { + c.mu_layout_row(&ctx, 1, &[_]i32{-1}, 0); + c.mu_label(&ctx, "System Status: ONLINE"); + + c.mu_layout_row(&ctx, 2, &[_]i32{ 80, -1 }, 0); + c.mu_label(&ctx, "CPU:"); + c.mu_draw_rect(&ctx, c.mu_rect(100, 50, 150, 20), c.mu_color(0, 255, 0, 255)); // Mock bar + + if (c.mu_button(&ctx, "REBOOT") != 0) { + // Logic hook! + // send_command(CMD_REBOOT); + } + + c.mu_end_window(&ctx); + } + + // 3. End Frame & Paint + c.mu_end(&ctx); + render(); + + // 4. Yield + fiber_yield(); + } +} diff --git a/libs/microui/include/stdio.h b/libs/microui/include/stdio.h new file mode 100644 index 0000000..6450e41 --- /dev/null +++ b/libs/microui/include/stdio.h @@ -0,0 +1,9 @@ +#ifndef _STDIO_H +#define _STDIO_H +typedef unsigned long size_t; +#define stderr ((void*)2) +int fprintf(void *stream, const char *format, ...); +int sprintf(char *str, const char *format, ...); +int snprintf(char *str, size_t size, const char *format, ...); +int vsnprintf(char *str, size_t size, const char *format, __builtin_va_list ap); +#endif diff --git a/libs/microui/include/stdlib.h b/libs/microui/include/stdlib.h new file mode 100644 index 0000000..2d903e4 --- /dev/null +++ b/libs/microui/include/stdlib.h @@ -0,0 +1,9 @@ +#ifndef _STDLIB_H +#define _STDLIB_H +#define NULL ((void*)0) +typedef unsigned long size_t; +int abs(int x); +void abort(void); +double strtod(const char *nptr, char **endptr); +void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *)); +#endif diff --git a/libs/microui/include/string.h b/libs/microui/include/string.h new file mode 100644 index 0000000..7d287d3 --- /dev/null +++ b/libs/microui/include/string.h @@ -0,0 +1,8 @@ +#ifndef _STRING_H +#define _STRING_H +typedef unsigned long size_t; +void *memset(void *s, int c, size_t n); +void *memcpy(void *dest, const void *src, size_t n); +void *memmove(void *dest, const void *src, size_t n); +size_t strlen(const char *s); +#endif diff --git a/libs/microui/microui.c b/libs/microui/microui.c new file mode 100644 index 0000000..0415e45 --- /dev/null +++ b/libs/microui/microui.c @@ -0,0 +1,1208 @@ +/* +** Copyright (c) 2024 rxi +** +** Permission is hereby granted, free of charge, to any person obtaining a copy +** of this software and associated documentation files (the "Software"), to +** deal in the Software without restriction, including without limitation the +** rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +** sell copies of the Software, and to permit persons to whom the Software is +** furnished to do so, subject to the following conditions: +** +** The above copyright notice and this permission notice shall be included in +** all copies or substantial portions of the Software. +** +** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +** FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS +** IN THE SOFTWARE. +*/ + +#include +#include +#include +#include "microui.h" + +#define unused(x) ((void) (x)) + +#define expect(x) do { \ + if (!(x)) { \ + fprintf(stderr, "Fatal error: %s:%d: assertion '%s' failed\n", \ + __FILE__, __LINE__, #x); \ + abort(); \ + } \ + } while (0) + +#define push(stk, val) do { \ + expect((stk).idx < (int) (sizeof((stk).items) / sizeof(*(stk).items))); \ + (stk).items[(stk).idx] = (val); \ + (stk).idx++; /* incremented after incase `val` uses this value */ \ + } while (0) + +#define pop(stk) do { \ + expect((stk).idx > 0); \ + (stk).idx--; \ + } while (0) + + +static mu_Rect unclipped_rect = { 0, 0, 0x1000000, 0x1000000 }; + +static mu_Style default_style = { + /* font | size | padding | spacing | indent */ + NULL, { 68, 10 }, 5, 4, 24, + /* title_height | scrollbar_size | thumb_size */ + 24, 12, 8, + { + { 230, 230, 230, 255 }, /* MU_COLOR_TEXT */ + { 25, 25, 25, 255 }, /* MU_COLOR_BORDER */ + { 50, 50, 50, 255 }, /* MU_COLOR_WINDOWBG */ + { 25, 25, 25, 255 }, /* MU_COLOR_TITLEBG */ + { 240, 240, 240, 255 }, /* MU_COLOR_TITLETEXT */ + { 0, 0, 0, 0 }, /* MU_COLOR_PANELBG */ + { 75, 75, 75, 255 }, /* MU_COLOR_BUTTON */ + { 95, 95, 95, 255 }, /* MU_COLOR_BUTTONHOVER */ + { 115, 115, 115, 255 }, /* MU_COLOR_BUTTONFOCUS */ + { 30, 30, 30, 255 }, /* MU_COLOR_BASE */ + { 35, 35, 35, 255 }, /* MU_COLOR_BASEHOVER */ + { 40, 40, 40, 255 }, /* MU_COLOR_BASEFOCUS */ + { 43, 43, 43, 255 }, /* MU_COLOR_SCROLLBASE */ + { 30, 30, 30, 255 } /* MU_COLOR_SCROLLTHUMB */ + } +}; + + +mu_Vec2 mu_vec2(int x, int y) { + mu_Vec2 res; + res.x = x; res.y = y; + return res; +} + + +mu_Rect mu_rect(int x, int y, int w, int h) { + mu_Rect res; + res.x = x; res.y = y; res.w = w; res.h = h; + return res; +} + + +mu_Color mu_color(int r, int g, int b, int a) { + mu_Color res; + res.r = r; res.g = g; res.b = b; res.a = a; + return res; +} + + +static mu_Rect expand_rect(mu_Rect rect, int n) { + return mu_rect(rect.x - n, rect.y - n, rect.w + n * 2, rect.h + n * 2); +} + + +static mu_Rect intersect_rects(mu_Rect r1, mu_Rect r2) { + int x1 = mu_max(r1.x, r2.x); + int y1 = mu_max(r1.y, r2.y); + int x2 = mu_min(r1.x + r1.w, r2.x + r2.w); + int y2 = mu_min(r1.y + r1.h, r2.y + r2.h); + if (x2 < x1) { x2 = x1; } + if (y2 < y1) { y2 = y1; } + return mu_rect(x1, y1, x2 - x1, y2 - y1); +} + + +static int rect_overlaps_vec2(mu_Rect r, mu_Vec2 p) { + return p.x >= r.x && p.x < r.x + r.w && p.y >= r.y && p.y < r.y + r.h; +} + + +static void draw_frame(mu_Context *ctx, mu_Rect rect, int colorid) { + mu_draw_rect(ctx, rect, ctx->style->colors[colorid]); + if (colorid == MU_COLOR_SCROLLBASE || + colorid == MU_COLOR_SCROLLTHUMB || + colorid == MU_COLOR_TITLEBG) { return; } + /* draw border */ + if (ctx->style->colors[MU_COLOR_BORDER].a) { + mu_draw_box(ctx, expand_rect(rect, 1), ctx->style->colors[MU_COLOR_BORDER]); + } +} + + +void mu_init(mu_Context *ctx) { + memset(ctx, 0, sizeof(*ctx)); + ctx->draw_frame = draw_frame; + ctx->_style = default_style; + ctx->style = &ctx->_style; +} + + +void mu_begin(mu_Context *ctx) { + expect(ctx->text_width && ctx->text_height); + ctx->command_list.idx = 0; + ctx->root_list.idx = 0; + ctx->scroll_target = NULL; + ctx->hover_root = ctx->next_hover_root; + ctx->next_hover_root = NULL; + ctx->mouse_delta.x = ctx->mouse_pos.x - ctx->last_mouse_pos.x; + ctx->mouse_delta.y = ctx->mouse_pos.y - ctx->last_mouse_pos.y; + ctx->frame++; +} + + +static int compare_zindex(const void *a, const void *b) { + return (*(mu_Container**) a)->zindex - (*(mu_Container**) b)->zindex; +} + + +void mu_end(mu_Context *ctx) { + int i, n; + /* check stacks */ + expect(ctx->container_stack.idx == 0); + expect(ctx->clip_stack.idx == 0); + expect(ctx->id_stack.idx == 0); + expect(ctx->layout_stack.idx == 0); + + /* handle scroll input */ + if (ctx->scroll_target) { + ctx->scroll_target->scroll.x += ctx->scroll_delta.x; + ctx->scroll_target->scroll.y += ctx->scroll_delta.y; + } + + /* unset focus if focus id was not touched this frame */ + if (!ctx->updated_focus) { ctx->focus = 0; } + ctx->updated_focus = 0; + + /* bring hover root to front if mouse was pressed */ + if (ctx->mouse_pressed && ctx->next_hover_root && + ctx->next_hover_root->zindex < ctx->last_zindex && + ctx->next_hover_root->zindex >= 0 + ) { + mu_bring_to_front(ctx, ctx->next_hover_root); + } + + /* reset input state */ + ctx->key_pressed = 0; + ctx->input_text[0] = '\0'; + ctx->mouse_pressed = 0; + ctx->scroll_delta = mu_vec2(0, 0); + ctx->last_mouse_pos = ctx->mouse_pos; + + /* sort root containers by zindex */ + n = ctx->root_list.idx; + qsort(ctx->root_list.items, n, sizeof(mu_Container*), compare_zindex); + + /* set root container jump commands */ + for (i = 0; i < n; i++) { + mu_Container *cnt = ctx->root_list.items[i]; + /* if this is the first container then make the first command jump to it. + ** otherwise set the previous container's tail to jump to this one */ + if (i == 0) { + mu_Command *cmd = (mu_Command*) ctx->command_list.items; + cmd->jump.dst = (char*) cnt->head + sizeof(mu_JumpCommand); + } else { + mu_Container *prev = ctx->root_list.items[i - 1]; + prev->tail->jump.dst = (char*) cnt->head + sizeof(mu_JumpCommand); + } + /* make the last container's tail jump to the end of command list */ + if (i == n - 1) { + cnt->tail->jump.dst = ctx->command_list.items + ctx->command_list.idx; + } + } +} + + +void mu_set_focus(mu_Context *ctx, mu_Id id) { + ctx->focus = id; + ctx->updated_focus = 1; +} + + +/* 32bit fnv-1a hash */ +#define HASH_INITIAL 2166136261 + +static void hash(mu_Id *hash, const void *data, int size) { + const unsigned char *p = data; + while (size--) { + *hash = (*hash ^ *p++) * 16777619; + } +} + + +mu_Id mu_get_id(mu_Context *ctx, const void *data, int size) { + int idx = ctx->id_stack.idx; + mu_Id res = (idx > 0) ? ctx->id_stack.items[idx - 1] : HASH_INITIAL; + hash(&res, data, size); + ctx->last_id = res; + return res; +} + + +void mu_push_id(mu_Context *ctx, const void *data, int size) { + push(ctx->id_stack, mu_get_id(ctx, data, size)); +} + + +void mu_pop_id(mu_Context *ctx) { + pop(ctx->id_stack); +} + + +void mu_push_clip_rect(mu_Context *ctx, mu_Rect rect) { + mu_Rect last = mu_get_clip_rect(ctx); + push(ctx->clip_stack, intersect_rects(rect, last)); +} + + +void mu_pop_clip_rect(mu_Context *ctx) { + pop(ctx->clip_stack); +} + + +mu_Rect mu_get_clip_rect(mu_Context *ctx) { + expect(ctx->clip_stack.idx > 0); + return ctx->clip_stack.items[ctx->clip_stack.idx - 1]; +} + + +int mu_check_clip(mu_Context *ctx, mu_Rect r) { + mu_Rect cr = mu_get_clip_rect(ctx); + if (r.x > cr.x + cr.w || r.x + r.w < cr.x || + r.y > cr.y + cr.h || r.y + r.h < cr.y ) { return MU_CLIP_ALL; } + if (r.x >= cr.x && r.x + r.w <= cr.x + cr.w && + r.y >= cr.y && r.y + r.h <= cr.y + cr.h ) { return 0; } + return MU_CLIP_PART; +} + + +static void push_layout(mu_Context *ctx, mu_Rect body, mu_Vec2 scroll) { + mu_Layout layout; + int width = 0; + memset(&layout, 0, sizeof(layout)); + layout.body = mu_rect(body.x - scroll.x, body.y - scroll.y, body.w, body.h); + layout.max = mu_vec2(-0x1000000, -0x1000000); + push(ctx->layout_stack, layout); + mu_layout_row(ctx, 1, &width, 0); +} + + +static mu_Layout* get_layout(mu_Context *ctx) { + return &ctx->layout_stack.items[ctx->layout_stack.idx - 1]; +} + + +static void pop_container(mu_Context *ctx) { + mu_Container *cnt = mu_get_current_container(ctx); + mu_Layout *layout = get_layout(ctx); + cnt->content_size.x = layout->max.x - layout->body.x; + cnt->content_size.y = layout->max.y - layout->body.y; + /* pop container, layout and id */ + pop(ctx->container_stack); + pop(ctx->layout_stack); + mu_pop_id(ctx); +} + + +mu_Container* mu_get_current_container(mu_Context *ctx) { + expect(ctx->container_stack.idx > 0); + return ctx->container_stack.items[ ctx->container_stack.idx - 1 ]; +} + + +static mu_Container* get_container(mu_Context *ctx, mu_Id id, int opt) { + mu_Container *cnt; + /* try to get existing container from pool */ + int idx = mu_pool_get(ctx, ctx->container_pool, MU_CONTAINERPOOL_SIZE, id); + if (idx >= 0) { + if (ctx->containers[idx].open || ~opt & MU_OPT_CLOSED) { + mu_pool_update(ctx, ctx->container_pool, idx); + } + return &ctx->containers[idx]; + } + if (opt & MU_OPT_CLOSED) { return NULL; } + /* container not found in pool: init new container */ + idx = mu_pool_init(ctx, ctx->container_pool, MU_CONTAINERPOOL_SIZE, id); + cnt = &ctx->containers[idx]; + memset(cnt, 0, sizeof(*cnt)); + cnt->open = 1; + mu_bring_to_front(ctx, cnt); + return cnt; +} + + +mu_Container* mu_get_container(mu_Context *ctx, const char *name) { + mu_Id id = mu_get_id(ctx, name, strlen(name)); + return get_container(ctx, id, 0); +} + + +void mu_bring_to_front(mu_Context *ctx, mu_Container *cnt) { + cnt->zindex = ++ctx->last_zindex; +} + + +/*============================================================================ +** pool +**============================================================================*/ + +int mu_pool_init(mu_Context *ctx, mu_PoolItem *items, int len, mu_Id id) { + int i, n = -1, f = ctx->frame; + for (i = 0; i < len; i++) { + if (items[i].last_update < f) { + f = items[i].last_update; + n = i; + } + } + expect(n > -1); + items[n].id = id; + mu_pool_update(ctx, items, n); + return n; +} + + +int mu_pool_get(mu_Context *ctx, mu_PoolItem *items, int len, mu_Id id) { + int i; + unused(ctx); + for (i = 0; i < len; i++) { + if (items[i].id == id) { return i; } + } + return -1; +} + + +void mu_pool_update(mu_Context *ctx, mu_PoolItem *items, int idx) { + items[idx].last_update = ctx->frame; +} + + +/*============================================================================ +** input handlers +**============================================================================*/ + +void mu_input_mousemove(mu_Context *ctx, int x, int y) { + ctx->mouse_pos = mu_vec2(x, y); +} + + +void mu_input_mousedown(mu_Context *ctx, int x, int y, int btn) { + mu_input_mousemove(ctx, x, y); + ctx->mouse_down |= btn; + ctx->mouse_pressed |= btn; +} + + +void mu_input_mouseup(mu_Context *ctx, int x, int y, int btn) { + mu_input_mousemove(ctx, x, y); + ctx->mouse_down &= ~btn; +} + + +void mu_input_scroll(mu_Context *ctx, int x, int y) { + ctx->scroll_delta.x += x; + ctx->scroll_delta.y += y; +} + + +void mu_input_keydown(mu_Context *ctx, int key) { + ctx->key_pressed |= key; + ctx->key_down |= key; +} + + +void mu_input_keyup(mu_Context *ctx, int key) { + ctx->key_down &= ~key; +} + + +void mu_input_text(mu_Context *ctx, const char *text) { + int len = strlen(ctx->input_text); + int size = strlen(text) + 1; + expect(len + size <= (int) sizeof(ctx->input_text)); + memcpy(ctx->input_text + len, text, size); +} + + +/*============================================================================ +** commandlist +**============================================================================*/ + +mu_Command* mu_push_command(mu_Context *ctx, int type, int size) { + mu_Command *cmd = (mu_Command*) (ctx->command_list.items + ctx->command_list.idx); + expect(ctx->command_list.idx + size < MU_COMMANDLIST_SIZE); + cmd->base.type = type; + cmd->base.size = size; + ctx->command_list.idx += size; + return cmd; +} + + +int mu_next_command(mu_Context *ctx, mu_Command **cmd) { + if (*cmd) { + *cmd = (mu_Command*) (((char*) *cmd) + (*cmd)->base.size); + } else { + *cmd = (mu_Command*) ctx->command_list.items; + } + while ((char*) *cmd != ctx->command_list.items + ctx->command_list.idx) { + if ((*cmd)->type != MU_COMMAND_JUMP) { return 1; } + *cmd = (*cmd)->jump.dst; + } + return 0; +} + + +static mu_Command* push_jump(mu_Context *ctx, mu_Command *dst) { + mu_Command *cmd; + cmd = mu_push_command(ctx, MU_COMMAND_JUMP, sizeof(mu_JumpCommand)); + cmd->jump.dst = dst; + return cmd; +} + + +void mu_set_clip(mu_Context *ctx, mu_Rect rect) { + mu_Command *cmd; + cmd = mu_push_command(ctx, MU_COMMAND_CLIP, sizeof(mu_ClipCommand)); + cmd->clip.rect = rect; +} + + +void mu_draw_rect(mu_Context *ctx, mu_Rect rect, mu_Color color) { + mu_Command *cmd; + rect = intersect_rects(rect, mu_get_clip_rect(ctx)); + if (rect.w > 0 && rect.h > 0) { + cmd = mu_push_command(ctx, MU_COMMAND_RECT, sizeof(mu_RectCommand)); + cmd->rect.rect = rect; + cmd->rect.color = color; + } +} + + +void mu_draw_box(mu_Context *ctx, mu_Rect rect, mu_Color color) { + mu_draw_rect(ctx, mu_rect(rect.x + 1, rect.y, rect.w - 2, 1), color); + mu_draw_rect(ctx, mu_rect(rect.x + 1, rect.y + rect.h - 1, rect.w - 2, 1), color); + mu_draw_rect(ctx, mu_rect(rect.x, rect.y, 1, rect.h), color); + mu_draw_rect(ctx, mu_rect(rect.x + rect.w - 1, rect.y, 1, rect.h), color); +} + + +void mu_draw_text(mu_Context *ctx, mu_Font font, const char *str, int len, + mu_Vec2 pos, mu_Color color) +{ + mu_Command *cmd; + mu_Rect rect = mu_rect( + pos.x, pos.y, ctx->text_width(font, str, len), ctx->text_height(font)); + int clipped = mu_check_clip(ctx, rect); + if (clipped == MU_CLIP_ALL ) { return; } + if (clipped == MU_CLIP_PART) { mu_set_clip(ctx, mu_get_clip_rect(ctx)); } + /* add command */ + if (len < 0) { len = strlen(str); } + cmd = mu_push_command(ctx, MU_COMMAND_TEXT, sizeof(mu_TextCommand) + len); + memcpy(cmd->text.str, str, len); + cmd->text.str[len] = '\0'; + cmd->text.pos = pos; + cmd->text.color = color; + cmd->text.font = font; + /* reset clipping if it was set */ + if (clipped) { mu_set_clip(ctx, unclipped_rect); } +} + + +void mu_draw_icon(mu_Context *ctx, int id, mu_Rect rect, mu_Color color) { + mu_Command *cmd; + /* do clip command if the rect isn't fully contained within the cliprect */ + int clipped = mu_check_clip(ctx, rect); + if (clipped == MU_CLIP_ALL ) { return; } + if (clipped == MU_CLIP_PART) { mu_set_clip(ctx, mu_get_clip_rect(ctx)); } + /* do icon command */ + cmd = mu_push_command(ctx, MU_COMMAND_ICON, sizeof(mu_IconCommand)); + cmd->icon.id = id; + cmd->icon.rect = rect; + cmd->icon.color = color; + /* reset clipping if it was set */ + if (clipped) { mu_set_clip(ctx, unclipped_rect); } +} + + +/*============================================================================ +** layout +**============================================================================*/ + +enum { RELATIVE = 1, ABSOLUTE = 2 }; + + +void mu_layout_begin_column(mu_Context *ctx) { + push_layout(ctx, mu_layout_next(ctx), mu_vec2(0, 0)); +} + + +void mu_layout_end_column(mu_Context *ctx) { + mu_Layout *a, *b; + b = get_layout(ctx); + pop(ctx->layout_stack); + /* inherit position/next_row/max from child layout if they are greater */ + a = get_layout(ctx); + a->position.x = mu_max(a->position.x, b->position.x + b->body.x - a->body.x); + a->next_row = mu_max(a->next_row, b->next_row + b->body.y - a->body.y); + a->max.x = mu_max(a->max.x, b->max.x); + a->max.y = mu_max(a->max.y, b->max.y); +} + + +void mu_layout_row(mu_Context *ctx, int items, const int *widths, int height) { + mu_Layout *layout = get_layout(ctx); + if (widths) { + expect(items <= MU_MAX_WIDTHS); + memcpy(layout->widths, widths, items * sizeof(widths[0])); + } + layout->items = items; + layout->position = mu_vec2(layout->indent, layout->next_row); + layout->size.y = height; + layout->item_index = 0; +} + + +void mu_layout_width(mu_Context *ctx, int width) { + get_layout(ctx)->size.x = width; +} + + +void mu_layout_height(mu_Context *ctx, int height) { + get_layout(ctx)->size.y = height; +} + + +void mu_layout_set_next(mu_Context *ctx, mu_Rect r, int relative) { + mu_Layout *layout = get_layout(ctx); + layout->next = r; + layout->next_type = relative ? RELATIVE : ABSOLUTE; +} + + +mu_Rect mu_layout_next(mu_Context *ctx) { + mu_Layout *layout = get_layout(ctx); + mu_Style *style = ctx->style; + mu_Rect res; + + if (layout->next_type) { + /* handle rect set by `mu_layout_set_next` */ + int type = layout->next_type; + layout->next_type = 0; + res = layout->next; + if (type == ABSOLUTE) { return (ctx->last_rect = res); } + + } else { + /* handle next row */ + if (layout->item_index == layout->items) { + mu_layout_row(ctx, layout->items, NULL, layout->size.y); + } + + /* position */ + res.x = layout->position.x; + res.y = layout->position.y; + + /* size */ + res.w = layout->items > 0 ? layout->widths[layout->item_index] : layout->size.x; + res.h = layout->size.y; + if (res.w == 0) { res.w = style->size.x + style->padding * 2; } + if (res.h == 0) { res.h = style->size.y + style->padding * 2; } + if (res.w < 0) { res.w += layout->body.w - res.x + 1; } + if (res.h < 0) { res.h += layout->body.h - res.y + 1; } + + layout->item_index++; + } + + /* update position */ + layout->position.x += res.w + style->spacing; + layout->next_row = mu_max(layout->next_row, res.y + res.h + style->spacing); + + /* apply body offset */ + res.x += layout->body.x; + res.y += layout->body.y; + + /* update max position */ + layout->max.x = mu_max(layout->max.x, res.x + res.w); + layout->max.y = mu_max(layout->max.y, res.y + res.h); + + return (ctx->last_rect = res); +} + + +/*============================================================================ +** controls +**============================================================================*/ + +static int in_hover_root(mu_Context *ctx) { + int i = ctx->container_stack.idx; + while (i--) { + if (ctx->container_stack.items[i] == ctx->hover_root) { return 1; } + /* only root containers have their `head` field set; stop searching if we've + ** reached the current root container */ + if (ctx->container_stack.items[i]->head) { break; } + } + return 0; +} + + +void mu_draw_control_frame(mu_Context *ctx, mu_Id id, mu_Rect rect, + int colorid, int opt) +{ + if (opt & MU_OPT_NOFRAME) { return; } + colorid += (ctx->focus == id) ? 2 : (ctx->hover == id) ? 1 : 0; + ctx->draw_frame(ctx, rect, colorid); +} + + +void mu_draw_control_text(mu_Context *ctx, const char *str, mu_Rect rect, + int colorid, int opt) +{ + mu_Vec2 pos; + mu_Font font = ctx->style->font; + int tw = ctx->text_width(font, str, -1); + mu_push_clip_rect(ctx, rect); + pos.y = rect.y + (rect.h - ctx->text_height(font)) / 2; + if (opt & MU_OPT_ALIGNCENTER) { + pos.x = rect.x + (rect.w - tw) / 2; + } else if (opt & MU_OPT_ALIGNRIGHT) { + pos.x = rect.x + rect.w - tw - ctx->style->padding; + } else { + pos.x = rect.x + ctx->style->padding; + } + mu_draw_text(ctx, font, str, -1, pos, ctx->style->colors[colorid]); + mu_pop_clip_rect(ctx); +} + + +int mu_mouse_over(mu_Context *ctx, mu_Rect rect) { + return rect_overlaps_vec2(rect, ctx->mouse_pos) && + rect_overlaps_vec2(mu_get_clip_rect(ctx), ctx->mouse_pos) && + in_hover_root(ctx); +} + + +void mu_update_control(mu_Context *ctx, mu_Id id, mu_Rect rect, int opt) { + int mouseover = mu_mouse_over(ctx, rect); + + if (ctx->focus == id) { ctx->updated_focus = 1; } + if (opt & MU_OPT_NOINTERACT) { return; } + if (mouseover && !ctx->mouse_down) { ctx->hover = id; } + + if (ctx->focus == id) { + if (ctx->mouse_pressed && !mouseover) { mu_set_focus(ctx, 0); } + if (!ctx->mouse_down && ~opt & MU_OPT_HOLDFOCUS) { mu_set_focus(ctx, 0); } + } + + if (ctx->hover == id) { + if (ctx->mouse_pressed) { + mu_set_focus(ctx, id); + } else if (!mouseover) { + ctx->hover = 0; + } + } +} + + +void mu_text(mu_Context *ctx, const char *text) { + const char *start, *end, *p = text; + int width = -1; + mu_Font font = ctx->style->font; + mu_Color color = ctx->style->colors[MU_COLOR_TEXT]; + mu_layout_begin_column(ctx); + mu_layout_row(ctx, 1, &width, ctx->text_height(font)); + do { + mu_Rect r = mu_layout_next(ctx); + int w = 0; + start = end = p; + do { + const char* word = p; + while (*p && *p != ' ' && *p != '\n') { p++; } + w += ctx->text_width(font, word, p - word); + if (w > r.w && end != start) { break; } + w += ctx->text_width(font, p, 1); + end = p++; + } while (*end && *end != '\n'); + mu_draw_text(ctx, font, start, end - start, mu_vec2(r.x, r.y), color); + p = end + 1; + } while (*end); + mu_layout_end_column(ctx); +} + + +void mu_label(mu_Context *ctx, const char *text) { + mu_draw_control_text(ctx, text, mu_layout_next(ctx), MU_COLOR_TEXT, 0); +} + + +int mu_button_ex(mu_Context *ctx, const char *label, int icon, int opt) { + int res = 0; + mu_Id id = label ? mu_get_id(ctx, label, strlen(label)) + : mu_get_id(ctx, &icon, sizeof(icon)); + mu_Rect r = mu_layout_next(ctx); + mu_update_control(ctx, id, r, opt); + /* handle click */ + if (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->focus == id) { + res |= MU_RES_SUBMIT; + } + /* draw */ + mu_draw_control_frame(ctx, id, r, MU_COLOR_BUTTON, opt); + if (label) { mu_draw_control_text(ctx, label, r, MU_COLOR_TEXT, opt); } + if (icon) { mu_draw_icon(ctx, icon, r, ctx->style->colors[MU_COLOR_TEXT]); } + return res; +} + + +int mu_checkbox(mu_Context *ctx, const char *label, int *state) { + int res = 0; + mu_Id id = mu_get_id(ctx, &state, sizeof(state)); + mu_Rect r = mu_layout_next(ctx); + mu_Rect box = mu_rect(r.x, r.y, r.h, r.h); + mu_update_control(ctx, id, r, 0); + /* handle click */ + if (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->focus == id) { + res |= MU_RES_CHANGE; + *state = !*state; + } + /* draw */ + mu_draw_control_frame(ctx, id, box, MU_COLOR_BASE, 0); + if (*state) { + mu_draw_icon(ctx, MU_ICON_CHECK, box, ctx->style->colors[MU_COLOR_TEXT]); + } + r = mu_rect(r.x + box.w, r.y, r.w - box.w, r.h); + mu_draw_control_text(ctx, label, r, MU_COLOR_TEXT, 0); + return res; +} + + +int mu_textbox_raw(mu_Context *ctx, char *buf, int bufsz, mu_Id id, mu_Rect r, + int opt) +{ + int res = 0; + mu_update_control(ctx, id, r, opt | MU_OPT_HOLDFOCUS); + + if (ctx->focus == id) { + /* handle text input */ + int len = strlen(buf); + int n = mu_min(bufsz - len - 1, (int) strlen(ctx->input_text)); + if (n > 0) { + memcpy(buf + len, ctx->input_text, n); + len += n; + buf[len] = '\0'; + res |= MU_RES_CHANGE; + } + /* handle backspace */ + if (ctx->key_pressed & MU_KEY_BACKSPACE && len > 0) { + /* skip utf-8 continuation bytes */ + while ((buf[--len] & 0xc0) == 0x80 && len > 0); + buf[len] = '\0'; + res |= MU_RES_CHANGE; + } + /* handle return */ + if (ctx->key_pressed & MU_KEY_RETURN) { + mu_set_focus(ctx, 0); + res |= MU_RES_SUBMIT; + } + } + + /* draw */ + mu_draw_control_frame(ctx, id, r, MU_COLOR_BASE, opt); + if (ctx->focus == id) { + mu_Color color = ctx->style->colors[MU_COLOR_TEXT]; + mu_Font font = ctx->style->font; + int textw = ctx->text_width(font, buf, -1); + int texth = ctx->text_height(font); + int ofx = r.w - ctx->style->padding - textw - 1; + int textx = r.x + mu_min(ofx, ctx->style->padding); + int texty = r.y + (r.h - texth) / 2; + mu_push_clip_rect(ctx, r); + mu_draw_text(ctx, font, buf, -1, mu_vec2(textx, texty), color); + mu_draw_rect(ctx, mu_rect(textx + textw, texty, 1, texth), color); + mu_pop_clip_rect(ctx); + } else { + mu_draw_control_text(ctx, buf, r, MU_COLOR_TEXT, opt); + } + + return res; +} + + +static int number_textbox(mu_Context *ctx, mu_Real *value, mu_Rect r, mu_Id id) { + if (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->key_down & MU_KEY_SHIFT && + ctx->hover == id + ) { + ctx->number_edit = id; + sprintf(ctx->number_edit_buf, MU_REAL_FMT, *value); + } + if (ctx->number_edit == id) { + int res = mu_textbox_raw( + ctx, ctx->number_edit_buf, sizeof(ctx->number_edit_buf), id, r, 0); + if (res & MU_RES_SUBMIT || ctx->focus != id) { + *value = strtod(ctx->number_edit_buf, NULL); + ctx->number_edit = 0; + } else { + return 1; + } + } + return 0; +} + + +int mu_textbox_ex(mu_Context *ctx, char *buf, int bufsz, int opt) { + mu_Id id = mu_get_id(ctx, &buf, sizeof(buf)); + mu_Rect r = mu_layout_next(ctx); + return mu_textbox_raw(ctx, buf, bufsz, id, r, opt); +} + + +int mu_slider_ex(mu_Context *ctx, mu_Real *value, mu_Real low, mu_Real high, + mu_Real step, const char *fmt, int opt) +{ + char buf[MU_MAX_FMT + 1]; + mu_Rect thumb; + int x, w, res = 0; + mu_Real last = *value, v = last; + mu_Id id = mu_get_id(ctx, &value, sizeof(value)); + mu_Rect base = mu_layout_next(ctx); + + /* handle text input mode */ + if (number_textbox(ctx, &v, base, id)) { return res; } + + /* handle normal mode */ + mu_update_control(ctx, id, base, opt); + + /* handle input */ + if (ctx->focus == id && + (ctx->mouse_down | ctx->mouse_pressed) == MU_MOUSE_LEFT) + { + v = low + (ctx->mouse_pos.x - base.x) * (high - low) / base.w; + if (step) { v = ((long long)((v + step / 2) / step)) * step; } + } + /* clamp and store value, update res */ + *value = v = mu_clamp(v, low, high); + if (last != v) { res |= MU_RES_CHANGE; } + + /* draw base */ + mu_draw_control_frame(ctx, id, base, MU_COLOR_BASE, opt); + /* draw thumb */ + w = ctx->style->thumb_size; + x = (v - low) * (base.w - w) / (high - low); + thumb = mu_rect(base.x + x, base.y, w, base.h); + mu_draw_control_frame(ctx, id, thumb, MU_COLOR_BUTTON, opt); + /* draw text */ + sprintf(buf, fmt, v); + mu_draw_control_text(ctx, buf, base, MU_COLOR_TEXT, opt); + + return res; +} + + +int mu_number_ex(mu_Context *ctx, mu_Real *value, mu_Real step, + const char *fmt, int opt) +{ + char buf[MU_MAX_FMT + 1]; + int res = 0; + mu_Id id = mu_get_id(ctx, &value, sizeof(value)); + mu_Rect base = mu_layout_next(ctx); + mu_Real last = *value; + + /* handle text input mode */ + if (number_textbox(ctx, value, base, id)) { return res; } + + /* handle normal mode */ + mu_update_control(ctx, id, base, opt); + + /* handle input */ + if (ctx->focus == id && ctx->mouse_down == MU_MOUSE_LEFT) { + *value += ctx->mouse_delta.x * step; + } + /* set flag if value changed */ + if (*value != last) { res |= MU_RES_CHANGE; } + + /* draw base */ + mu_draw_control_frame(ctx, id, base, MU_COLOR_BASE, opt); + /* draw text */ + sprintf(buf, fmt, *value); + mu_draw_control_text(ctx, buf, base, MU_COLOR_TEXT, opt); + + return res; +} + + +static int header(mu_Context *ctx, const char *label, int istreenode, int opt) { + mu_Rect r; + int active, expanded; + mu_Id id = mu_get_id(ctx, label, strlen(label)); + int idx = mu_pool_get(ctx, ctx->treenode_pool, MU_TREENODEPOOL_SIZE, id); + int width = -1; + mu_layout_row(ctx, 1, &width, 0); + + active = (idx >= 0); + expanded = (opt & MU_OPT_EXPANDED) ? !active : active; + r = mu_layout_next(ctx); + mu_update_control(ctx, id, r, 0); + + /* handle click */ + active ^= (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->focus == id); + + /* update pool ref */ + if (idx >= 0) { + if (active) { mu_pool_update(ctx, ctx->treenode_pool, idx); } + else { memset(&ctx->treenode_pool[idx], 0, sizeof(mu_PoolItem)); } + } else if (active) { + mu_pool_init(ctx, ctx->treenode_pool, MU_TREENODEPOOL_SIZE, id); + } + + /* draw */ + if (istreenode) { + if (ctx->hover == id) { ctx->draw_frame(ctx, r, MU_COLOR_BUTTONHOVER); } + } else { + mu_draw_control_frame(ctx, id, r, MU_COLOR_BUTTON, 0); + } + mu_draw_icon( + ctx, expanded ? MU_ICON_EXPANDED : MU_ICON_COLLAPSED, + mu_rect(r.x, r.y, r.h, r.h), ctx->style->colors[MU_COLOR_TEXT]); + r.x += r.h - ctx->style->padding; + r.w -= r.h - ctx->style->padding; + mu_draw_control_text(ctx, label, r, MU_COLOR_TEXT, 0); + + return expanded ? MU_RES_ACTIVE : 0; +} + + +int mu_header_ex(mu_Context *ctx, const char *label, int opt) { + return header(ctx, label, 0, opt); +} + + +int mu_begin_treenode_ex(mu_Context *ctx, const char *label, int opt) { + int res = header(ctx, label, 1, opt); + if (res & MU_RES_ACTIVE) { + get_layout(ctx)->indent += ctx->style->indent; + push(ctx->id_stack, ctx->last_id); + } + return res; +} + + +void mu_end_treenode(mu_Context *ctx) { + get_layout(ctx)->indent -= ctx->style->indent; + mu_pop_id(ctx); +} + + +#define scrollbar(ctx, cnt, b, cs, x, y, w, h) \ + do { \ + /* only add scrollbar if content size is larger than body */ \ + int maxscroll = cs.y - b->h; \ + \ + if (maxscroll > 0 && b->h > 0) { \ + mu_Rect base, thumb; \ + mu_Id id = mu_get_id(ctx, "!scrollbar" #y, 11); \ + \ + /* get sizing / positioning */ \ + base = *b; \ + base.x = b->x + b->w; \ + base.w = ctx->style->scrollbar_size; \ + \ + /* handle input */ \ + mu_update_control(ctx, id, base, 0); \ + if (ctx->focus == id && ctx->mouse_down == MU_MOUSE_LEFT) { \ + cnt->scroll.y += ctx->mouse_delta.y * cs.y / base.h; \ + } \ + /* clamp scroll to limits */ \ + cnt->scroll.y = mu_clamp(cnt->scroll.y, 0, maxscroll); \ + \ + /* draw base and thumb */ \ + ctx->draw_frame(ctx, base, MU_COLOR_SCROLLBASE); \ + thumb = base; \ + thumb.h = mu_max(ctx->style->thumb_size, base.h * b->h / cs.y); \ + thumb.y += cnt->scroll.y * (base.h - thumb.h) / maxscroll; \ + ctx->draw_frame(ctx, thumb, MU_COLOR_SCROLLTHUMB); \ + \ + /* set this as the scroll_target (will get scrolled on mousewheel) */ \ + /* if the mouse is over it */ \ + if (mu_mouse_over(ctx, *b)) { ctx->scroll_target = cnt; } \ + } else { \ + cnt->scroll.y = 0; \ + } \ + } while (0) + + +static void scrollbars(mu_Context *ctx, mu_Container *cnt, mu_Rect *body) { + int sz = ctx->style->scrollbar_size; + mu_Vec2 cs = cnt->content_size; + cs.x += ctx->style->padding * 2; + cs.y += ctx->style->padding * 2; + mu_push_clip_rect(ctx, *body); + /* resize body to make room for scrollbars */ + if (cs.y > cnt->body.h) { body->w -= sz; } + if (cs.x > cnt->body.w) { body->h -= sz; } + /* to create a horizontal or vertical scrollbar almost-identical code is + ** used; only the references to `x|y` `w|h` need to be switched */ + scrollbar(ctx, cnt, body, cs, x, y, w, h); + scrollbar(ctx, cnt, body, cs, y, x, h, w); + mu_pop_clip_rect(ctx); +} + + +static void push_container_body( + mu_Context *ctx, mu_Container *cnt, mu_Rect body, int opt +) { + if (~opt & MU_OPT_NOSCROLL) { scrollbars(ctx, cnt, &body); } + push_layout(ctx, expand_rect(body, -ctx->style->padding), cnt->scroll); + cnt->body = body; +} + + +static void begin_root_container(mu_Context *ctx, mu_Container *cnt) { + push(ctx->container_stack, cnt); + /* push container to roots list and push head command */ + push(ctx->root_list, cnt); + cnt->head = push_jump(ctx, NULL); + /* set as hover root if the mouse is overlapping this container and it has a + ** higher zindex than the current hover root */ + if (rect_overlaps_vec2(cnt->rect, ctx->mouse_pos) && + (!ctx->next_hover_root || cnt->zindex > ctx->next_hover_root->zindex) + ) { + ctx->next_hover_root = cnt; + } + /* clipping is reset here in case a root-container is made within + ** another root-containers's begin/end block; this prevents the inner + ** root-container being clipped to the outer */ + push(ctx->clip_stack, unclipped_rect); +} + + +static void end_root_container(mu_Context *ctx) { + /* push tail 'goto' jump command and set head 'skip' command. the final steps + ** on initing these are done in mu_end() */ + mu_Container *cnt = mu_get_current_container(ctx); + cnt->tail = push_jump(ctx, NULL); + cnt->head->jump.dst = ctx->command_list.items + ctx->command_list.idx; + /* pop base clip rect and container */ + mu_pop_clip_rect(ctx); + pop_container(ctx); +} + + +int mu_begin_window_ex(mu_Context *ctx, const char *title, mu_Rect rect, int opt) { + mu_Rect body; + mu_Id id = mu_get_id(ctx, title, strlen(title)); + mu_Container *cnt = get_container(ctx, id, opt); + if (!cnt || !cnt->open) { return 0; } + push(ctx->id_stack, id); + + if (cnt->rect.w == 0) { cnt->rect = rect; } + begin_root_container(ctx, cnt); + rect = body = cnt->rect; + + /* draw frame */ + if (~opt & MU_OPT_NOFRAME) { + ctx->draw_frame(ctx, rect, MU_COLOR_WINDOWBG); + } + + /* do title bar */ + if (~opt & MU_OPT_NOTITLE) { + mu_Rect tr = rect; + tr.h = ctx->style->title_height; + ctx->draw_frame(ctx, tr, MU_COLOR_TITLEBG); + + /* do title text */ + if (~opt & MU_OPT_NOTITLE) { + mu_Id id = mu_get_id(ctx, "!title", 6); + mu_update_control(ctx, id, tr, opt); + mu_draw_control_text(ctx, title, tr, MU_COLOR_TITLETEXT, opt); + if (id == ctx->focus && ctx->mouse_down == MU_MOUSE_LEFT) { + cnt->rect.x += ctx->mouse_delta.x; + cnt->rect.y += ctx->mouse_delta.y; + } + body.y += tr.h; + body.h -= tr.h; + } + + /* do `close` button */ + if (~opt & MU_OPT_NOCLOSE) { + mu_Id id = mu_get_id(ctx, "!close", 6); + mu_Rect r = mu_rect(tr.x + tr.w - tr.h, tr.y, tr.h, tr.h); + tr.w -= r.w; + mu_draw_icon(ctx, MU_ICON_CLOSE, r, ctx->style->colors[MU_COLOR_TITLETEXT]); + mu_update_control(ctx, id, r, opt); + if (ctx->mouse_pressed == MU_MOUSE_LEFT && id == ctx->focus) { + cnt->open = 0; + } + } + } + + push_container_body(ctx, cnt, body, opt); + + /* do `resize` handle */ + if (~opt & MU_OPT_NORESIZE) { + int sz = ctx->style->title_height; + mu_Id id = mu_get_id(ctx, "!resize", 7); + mu_Rect r = mu_rect(rect.x + rect.w - sz, rect.y + rect.h - sz, sz, sz); + mu_update_control(ctx, id, r, opt); + if (id == ctx->focus && ctx->mouse_down == MU_MOUSE_LEFT) { + cnt->rect.w = mu_max(96, cnt->rect.w + ctx->mouse_delta.x); + cnt->rect.h = mu_max(64, cnt->rect.h + ctx->mouse_delta.y); + } + } + + /* resize to content size */ + if (opt & MU_OPT_AUTOSIZE) { + mu_Rect r = get_layout(ctx)->body; + cnt->rect.w = cnt->content_size.x + (cnt->rect.w - r.w); + cnt->rect.h = cnt->content_size.y + (cnt->rect.h - r.h); + } + + /* close if this is a popup window and elsewhere was clicked */ + if (opt & MU_OPT_POPUP && ctx->mouse_pressed && ctx->hover_root != cnt) { + cnt->open = 0; + } + + mu_push_clip_rect(ctx, cnt->body); + return MU_RES_ACTIVE; +} + + +void mu_end_window(mu_Context *ctx) { + mu_pop_clip_rect(ctx); + end_root_container(ctx); +} + + +void mu_open_popup(mu_Context *ctx, const char *name) { + mu_Container *cnt = mu_get_container(ctx, name); + /* set as hover root so popup isn't closed in begin_window_ex() */ + ctx->hover_root = ctx->next_hover_root = cnt; + /* position at mouse cursor, open and bring-to-front */ + cnt->rect = mu_rect(ctx->mouse_pos.x, ctx->mouse_pos.y, 1, 1); + cnt->open = 1; + mu_bring_to_front(ctx, cnt); +} + + +int mu_begin_popup(mu_Context *ctx, const char *name) { + int opt = MU_OPT_POPUP | MU_OPT_AUTOSIZE | MU_OPT_NORESIZE | + MU_OPT_NOSCROLL | MU_OPT_NOTITLE | MU_OPT_CLOSED; + return mu_begin_window_ex(ctx, name, mu_rect(0, 0, 0, 0), opt); +} + + +void mu_end_popup(mu_Context *ctx) { + mu_end_window(ctx); +} + + +void mu_begin_panel_ex(mu_Context *ctx, const char *name, int opt) { + mu_Container *cnt; + mu_push_id(ctx, name, strlen(name)); + cnt = get_container(ctx, ctx->last_id, opt); + cnt->rect = mu_layout_next(ctx); + if (~opt & MU_OPT_NOFRAME) { + ctx->draw_frame(ctx, cnt->rect, MU_COLOR_PANELBG); + } + push(ctx->container_stack, cnt); + push_container_body(ctx, cnt, cnt->rect, opt); + mu_push_clip_rect(ctx, cnt->body); +} + + +void mu_end_panel(mu_Context *ctx) { + mu_pop_clip_rect(ctx); + pop_container(ctx); +} diff --git a/libs/microui/microui.h b/libs/microui/microui.h new file mode 100644 index 0000000..6e18639 --- /dev/null +++ b/libs/microui/microui.h @@ -0,0 +1,296 @@ +/* +** Copyright (c) 2024 rxi +** +** This library is free software; you can redistribute it and/or modify it +** under the terms of the MIT license. See `microui.c` for details. +*/ + +#ifndef MICROUI_H +#define MICROUI_H + +#define MU_VERSION "2.02" + +#define MU_COMMANDLIST_SIZE (256 * 1024) +#define MU_ROOTLIST_SIZE 32 +#define MU_CONTAINERSTACK_SIZE 32 +#define MU_CLIPSTACK_SIZE 32 +#define MU_IDSTACK_SIZE 32 +#define MU_LAYOUTSTACK_SIZE 16 +#define MU_CONTAINERPOOL_SIZE 48 +#define MU_TREENODEPOOL_SIZE 48 +#define MU_MAX_WIDTHS 16 +#define MU_REAL float +#define MU_REAL_FMT "%.3g" +#define MU_SLIDER_FMT "%.2f" +#define MU_MAX_FMT 127 + +#define mu_stack(T, n) struct { int idx; T items[n]; } +#define mu_min(a, b) ((a) < (b) ? (a) : (b)) +#define mu_max(a, b) ((a) > (b) ? (a) : (b)) +#define mu_clamp(x, a, b) mu_min(b, mu_max(a, x)) + +enum { + MU_CLIP_PART = 1, + MU_CLIP_ALL +}; + +enum { + MU_COMMAND_JUMP = 1, + MU_COMMAND_CLIP, + MU_COMMAND_RECT, + MU_COMMAND_TEXT, + MU_COMMAND_ICON, + MU_COMMAND_MAX +}; + +enum { + MU_COLOR_TEXT, + MU_COLOR_BORDER, + MU_COLOR_WINDOWBG, + MU_COLOR_TITLEBG, + MU_COLOR_TITLETEXT, + MU_COLOR_PANELBG, + MU_COLOR_BUTTON, + MU_COLOR_BUTTONHOVER, + MU_COLOR_BUTTONFOCUS, + MU_COLOR_BASE, + MU_COLOR_BASEHOVER, + MU_COLOR_BASEFOCUS, + MU_COLOR_SCROLLBASE, + MU_COLOR_SCROLLTHUMB, + MU_COLOR_MAX +}; + +enum { + MU_ICON_CLOSE = 1, + MU_ICON_CHECK, + MU_ICON_COLLAPSED, + MU_ICON_EXPANDED, + MU_ICON_MAX +}; + +enum { + MU_RES_ACTIVE = (1 << 0), + MU_RES_SUBMIT = (1 << 1), + MU_RES_CHANGE = (1 << 2) +}; + +enum { + MU_OPT_ALIGNCENTER = (1 << 0), + MU_OPT_ALIGNRIGHT = (1 << 1), + MU_OPT_NOINTERACT = (1 << 2), + MU_OPT_NOFRAME = (1 << 3), + MU_OPT_NORESIZE = (1 << 4), + MU_OPT_NOSCROLL = (1 << 5), + MU_OPT_NOCLOSE = (1 << 6), + MU_OPT_NOTITLE = (1 << 7), + MU_OPT_HOLDFOCUS = (1 << 8), + MU_OPT_AUTOSIZE = (1 << 9), + MU_OPT_POPUP = (1 << 10), + MU_OPT_CLOSED = (1 << 11), + MU_OPT_EXPANDED = (1 << 12) +}; + +enum { + MU_MOUSE_LEFT = (1 << 0), + MU_MOUSE_RIGHT = (1 << 1), + MU_MOUSE_MIDDLE = (1 << 2) +}; + +enum { + MU_KEY_SHIFT = (1 << 0), + MU_KEY_CTRL = (1 << 1), + MU_KEY_ALT = (1 << 2), + MU_KEY_BACKSPACE = (1 << 3), + MU_KEY_RETURN = (1 << 4) +}; + + +typedef struct mu_Context mu_Context; +typedef unsigned mu_Id; +typedef MU_REAL mu_Real; +typedef void* mu_Font; + +typedef struct { int x, y; } mu_Vec2; +typedef struct { int x, y, w, h; } mu_Rect; +typedef struct { unsigned char r, g, b, a; } mu_Color; +typedef struct { mu_Id id; int last_update; } mu_PoolItem; + +typedef struct { int type, size; } mu_BaseCommand; +typedef struct { mu_BaseCommand base; void *dst; } mu_JumpCommand; +typedef struct { mu_BaseCommand base; mu_Rect rect; } mu_ClipCommand; +typedef struct { mu_BaseCommand base; mu_Rect rect; mu_Color color; } mu_RectCommand; +typedef struct { mu_BaseCommand base; mu_Font font; mu_Vec2 pos; mu_Color color; char str[1]; } mu_TextCommand; +typedef struct { mu_BaseCommand base; mu_Rect rect; int id; mu_Color color; } mu_IconCommand; + +typedef union { + int type; + mu_BaseCommand base; + mu_JumpCommand jump; + mu_ClipCommand clip; + mu_RectCommand rect; + mu_TextCommand text; + mu_IconCommand icon; +} mu_Command; + +typedef struct { + mu_Rect body; + mu_Rect next; + mu_Vec2 position; + mu_Vec2 size; + mu_Vec2 max; + int widths[MU_MAX_WIDTHS]; + int items; + int item_index; + int next_row; + int next_type; + int indent; +} mu_Layout; + +typedef struct { + mu_Command *head, *tail; + mu_Rect rect; + mu_Rect body; + mu_Vec2 content_size; + mu_Vec2 scroll; + int zindex; + int open; +} mu_Container; + +typedef struct { + mu_Font font; + mu_Vec2 size; + int padding; + int spacing; + int indent; + int title_height; + int scrollbar_size; + int thumb_size; + mu_Color colors[MU_COLOR_MAX]; +} mu_Style; + +struct mu_Context { + /* callbacks */ + int (*text_width)(mu_Font font, const char *str, int len); + int (*text_height)(mu_Font font); + void (*draw_frame)(mu_Context *ctx, mu_Rect rect, int colorid); + /* core state */ + mu_Style _style; + mu_Style *style; + mu_Id hover; + mu_Id focus; + mu_Id last_id; + mu_Rect last_rect; + int last_zindex; + int updated_focus; + int frame; + mu_Container *hover_root; + mu_Container *next_hover_root; + mu_Container *scroll_target; + char number_edit_buf[MU_MAX_FMT]; + mu_Id number_edit; + /* stacks */ + mu_stack(char, MU_COMMANDLIST_SIZE) command_list; + mu_stack(mu_Container*, MU_ROOTLIST_SIZE) root_list; + mu_stack(mu_Container*, MU_CONTAINERSTACK_SIZE) container_stack; + mu_stack(mu_Rect, MU_CLIPSTACK_SIZE) clip_stack; + mu_stack(mu_Id, MU_IDSTACK_SIZE) id_stack; + mu_stack(mu_Layout, MU_LAYOUTSTACK_SIZE) layout_stack; + /* retained state pools */ + mu_PoolItem container_pool[MU_CONTAINERPOOL_SIZE]; + mu_Container containers[MU_CONTAINERPOOL_SIZE]; + mu_PoolItem treenode_pool[MU_TREENODEPOOL_SIZE]; + /* input state */ + mu_Vec2 mouse_pos; + mu_Vec2 last_mouse_pos; + mu_Vec2 mouse_delta; + mu_Vec2 scroll_delta; + int mouse_down; + int mouse_pressed; + int key_down; + int key_pressed; + char input_text[32]; +}; + + +mu_Vec2 mu_vec2(int x, int y); +mu_Rect mu_rect(int x, int y, int w, int h); +mu_Color mu_color(int r, int g, int b, int a); + +void mu_init(mu_Context *ctx); +void mu_begin(mu_Context *ctx); +void mu_end(mu_Context *ctx); +void mu_set_focus(mu_Context *ctx, mu_Id id); +mu_Id mu_get_id(mu_Context *ctx, const void *data, int size); +void mu_push_id(mu_Context *ctx, const void *data, int size); +void mu_pop_id(mu_Context *ctx); +void mu_push_clip_rect(mu_Context *ctx, mu_Rect rect); +void mu_pop_clip_rect(mu_Context *ctx); +mu_Rect mu_get_clip_rect(mu_Context *ctx); +int mu_check_clip(mu_Context *ctx, mu_Rect r); +mu_Container* mu_get_current_container(mu_Context *ctx); +mu_Container* mu_get_container(mu_Context *ctx, const char *name); +void mu_bring_to_front(mu_Context *ctx, mu_Container *cnt); + +int mu_pool_init(mu_Context *ctx, mu_PoolItem *items, int len, mu_Id id); +int mu_pool_get(mu_Context *ctx, mu_PoolItem *items, int len, mu_Id id); +void mu_pool_update(mu_Context *ctx, mu_PoolItem *items, int idx); + +void mu_input_mousemove(mu_Context *ctx, int x, int y); +void mu_input_mousedown(mu_Context *ctx, int x, int y, int btn); +void mu_input_mouseup(mu_Context *ctx, int x, int y, int btn); +void mu_input_scroll(mu_Context *ctx, int x, int y); +void mu_input_keydown(mu_Context *ctx, int key); +void mu_input_keyup(mu_Context *ctx, int key); +void mu_input_text(mu_Context *ctx, const char *text); + +mu_Command* mu_push_command(mu_Context *ctx, int type, int size); +int mu_next_command(mu_Context *ctx, mu_Command **cmd); +void mu_set_clip(mu_Context *ctx, mu_Rect rect); +void mu_draw_rect(mu_Context *ctx, mu_Rect rect, mu_Color color); +void mu_draw_box(mu_Context *ctx, mu_Rect rect, mu_Color color); +void mu_draw_text(mu_Context *ctx, mu_Font font, const char *str, int len, mu_Vec2 pos, mu_Color color); +void mu_draw_icon(mu_Context *ctx, int id, mu_Rect rect, mu_Color color); + +void mu_layout_row(mu_Context *ctx, int items, const int *widths, int height); +void mu_layout_width(mu_Context *ctx, int width); +void mu_layout_height(mu_Context *ctx, int height); +void mu_layout_begin_column(mu_Context *ctx); +void mu_layout_end_column(mu_Context *ctx); +void mu_layout_set_next(mu_Context *ctx, mu_Rect r, int relative); +mu_Rect mu_layout_next(mu_Context *ctx); + +void mu_draw_control_frame(mu_Context *ctx, mu_Id id, mu_Rect rect, int colorid, int opt); +void mu_draw_control_text(mu_Context *ctx, const char *str, mu_Rect rect, int colorid, int opt); +int mu_mouse_over(mu_Context *ctx, mu_Rect rect); +void mu_update_control(mu_Context *ctx, mu_Id id, mu_Rect rect, int opt); + +#define mu_button(ctx, label) mu_button_ex(ctx, label, 0, MU_OPT_ALIGNCENTER) +#define mu_textbox(ctx, buf, bufsz) mu_textbox_ex(ctx, buf, bufsz, 0) +#define mu_slider(ctx, value, lo, hi) mu_slider_ex(ctx, value, lo, hi, 0, MU_SLIDER_FMT, MU_OPT_ALIGNCENTER) +#define mu_number(ctx, value, step) mu_number_ex(ctx, value, step, MU_SLIDER_FMT, MU_OPT_ALIGNCENTER) +#define mu_header(ctx, label) mu_header_ex(ctx, label, 0) +#define mu_begin_treenode(ctx, label) mu_begin_treenode_ex(ctx, label, 0) +#define mu_begin_window(ctx, title, rect) mu_begin_window_ex(ctx, title, rect, 0) +#define mu_begin_panel(ctx, name) mu_begin_panel_ex(ctx, name, 0) + +void mu_text(mu_Context *ctx, const char *text); +void mu_label(mu_Context *ctx, const char *text); +int mu_button_ex(mu_Context *ctx, const char *label, int icon, int opt); +int mu_checkbox(mu_Context *ctx, const char *label, int *state); +int mu_textbox_raw(mu_Context *ctx, char *buf, int bufsz, mu_Id id, mu_Rect r, int opt); +int mu_textbox_ex(mu_Context *ctx, char *buf, int bufsz, int opt); +int mu_slider_ex(mu_Context *ctx, mu_Real *value, mu_Real low, mu_Real high, mu_Real step, const char *fmt, int opt); +int mu_number_ex(mu_Context *ctx, mu_Real *value, mu_Real step, const char *fmt, int opt); +int mu_header_ex(mu_Context *ctx, const char *label, int opt); +int mu_begin_treenode_ex(mu_Context *ctx, const char *label, int opt); +void mu_end_treenode(mu_Context *ctx); +int mu_begin_window_ex(mu_Context *ctx, const char *title, mu_Rect rect, int opt); +void mu_end_window(mu_Context *ctx); +void mu_open_popup(mu_Context *ctx, const char *name); +int mu_begin_popup(mu_Context *ctx, const char *name); +void mu_end_popup(mu_Context *ctx); +void mu_begin_panel_ex(mu_Context *ctx, const char *name, int opt); +void mu_end_panel(mu_Context *ctx); + +#endif