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

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);
+}