feat(bar): 新增 text 文字排版模块并将其集成到 bar 生命周期中

CMakeLists.txt

@@ -31,6 +31,7 @@ add_executable(${APP_NAME}
 
     ${SOURCE_DIR}/bar/bar.c
     ${SOURCE_DIR}/bar/cell.c
+    ${SOURCE_DIR}/bar/text.c
     ${SOURCE_DIR}/bar/workspaces.c
 
     ${SOURCE_DIR}/base/color.c
@@ -81,6 +82,8 @@ pkg_check_modules(deps REQUIRED
 
     cairo
     cairo-xcb
+    pango
+    pangocairo
 )
 
 target_include_directories(${APP_NAME} SYSTEM

src/bar/bar.c

@@ -5,6 +5,7 @@
 #include <zdwm/bar.h>
 #include <zdwm/types.h>
 
+#include "bar/text.h"
 #include "bar/types.h"
 #include "bar/workspaces.h"
 #include "base/array.h"
@@ -59,6 +60,9 @@ void bar_output_add_workspace(
 }
 
 void bar_init(bar_t *bar) {
+  auto c   = &bar->config;
+  bar->ctx = text_context_create(c->font_family, c->font_size, c->dpi);
+
   for (size_t i = 0; i < bar->count; ++i) {
     auto bar_output = &bar->bars[i];
     bar_output_add_workspace(bar_output, &bar->config);
@@ -73,6 +77,9 @@ static void bar_side_cleanup(bar_side_t *side) {
 }
 
 void bar_cleanup(bar_t *bar) {
+  text_context_destory(bar->ctx);
+  bar->ctx = nullptr;
+
   for (size_t i = 0; i < bar->count; ++i) {
     auto bar_output = &bar->bars[i];
     for (size_t j = 0; j < ZDWM_BAR_SIDE_COUNT; ++j) {

src/bar/bar.h

@@ -5,6 +5,7 @@
 #include <zdwm/bar.h>
 #include <zdwm/types.h>
 
+#include "bar/text.h"
 #include "bar/types.h"
 #include "base/color.h"
 
@@ -27,6 +28,7 @@ typedef struct bar_t {
 
   zdwm_bar_config_t config;
   bar_palette_t palette;
+  text_context_t *ctx;
 } bar_t;
 
 void bar_init(bar_t *bar);

src/bar/text.c

@@ -0,0 +1,69 @@
+#include "bar/text.h"
+
+#include <glib-object.h>
+#include <pango/pango-attributes.h>
+#include <pango/pango-context.h>
+#include <pango/pango-font.h>
+#include <pango/pango-layout.h>
+#include <pango/pango-types.h>
+#include <pango/pangocairo.h>
+
+#include "base/memory.h"
+
+struct text_context_t {
+  PangoContext *context;
+  PangoLayout *layout;
+  PangoAttrList *attr_list;
+};
+
+text_context_t *
+text_context_create(const char *family, uint32_t size, uint32_t dpi) {
+  auto fontmap = pango_cairo_font_map_new();
+  auto context = pango_font_map_create_context(fontmap);
+  pango_cairo_context_set_resolution(context, (double)dpi);
+
+  auto desc = pango_font_description_from_string(family);
+  pango_font_description_set_size(desc, size * PANGO_SCALE);
+  auto attr = pango_attr_font_desc_new(desc);
+
+  auto attr_list = pango_attr_list_new();
+  pango_attr_list_insert(attr_list, attr);
+
+  auto layout = pango_layout_new(context);
+  pango_layout_set_attributes(layout, attr_list);
+  pango_layout_set_wrap(layout, PANGO_WRAP_NONE);
+  pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
+
+  pango_font_description_free(desc);
+  g_object_unref(fontmap);
+
+  auto ctx = p_new(text_context_t, 1);
+  *ctx     = (text_context_t){
+        .context   = context,
+        .layout    = layout,
+        .attr_list = attr_list,
+  };
+
+  return ctx;
+}
+
+void text_context_destory(text_context_t *context) {
+  if (!context) return;
+
+  if (context->layout) {
+    g_object_unref(context->layout);
+    context->layout = nullptr;
+  }
+
+  if (context->attr_list) {
+    pango_attr_list_unref(context->attr_list);
+    context->attr_list = nullptr;
+  }
+
+  if (context->context) {
+    g_object_unref(context->context);
+    context->context = nullptr;
+  }
+
+  p_delete(&context);
+}

src/bar/text.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct text_context_t text_context_t;
+
+text_context_t *
+text_context_create(const char *family, uint32_t size, uint32_t dpi);
+void text_context_destory(text_context_t *context);