Add message preview functionality and refactor MessageEditor

- Introduced MessagePreview class to handle message rendering and preview logic.
- Updated MessageEditor to utilize MessagePreview for drawing messages and managing font graphics.
- Refactored drawing methods to improve organization and clarity, including the addition of DrawFontAtlas and DrawExpandedMessageSettings.
- Enhanced message handling by integrating new dictionary entry lookup and improved bitmap updates for message previews.
- Cleaned up unused functions and variables to streamline the codebase.

src/app/editor/message/message_editor.h

@@ -8,6 +8,7 @@
 #include "absl/status/status.h"
 #include "app/editor/editor.h"
 #include "app/editor/message/message_data.h"
+#include "app/editor/message/message_preview.h"
 #include "app/gfx/bitmap.h"
 #include "app/gui/canvas.h"
 #include "app/gui/style.h"
@@ -19,13 +20,10 @@ namespace editor {
 constexpr int kGfxFont = 0x70000;  // 2bpp format
 constexpr int kCharactersWidth = 0x74ADF;
 constexpr int kNumMessages = 396;
-constexpr int kCurrentMessageWidth = 172;
-constexpr int kCurrentMessageHeight = 4096;
 constexpr int kFontGfxMessageSize = 128;
 constexpr int kFontGfxMessageDepth = 64;
 constexpr int kFontGfx16Size = 172 * 4096;
 
-constexpr uint8_t kWidthArraySize = 100;
 constexpr uint8_t kBlockTerminator = 0x80;
 constexpr uint8_t kMessageBankChangeId = 0x80;
 
@@ -51,17 +49,11 @@ class MessageEditor : public Editor {
 
   void DrawMessageList();
   void DrawCurrentMessage();
+  void DrawFontAtlas();
   void DrawTextCommands();
   void DrawSpecialCharacters();
   void DrawExpandedMessageSettings();
   void DrawDictionary();
-
-  void DrawTileToPreview(int x, int y, int srcx, int srcy, int pal,
-                         int sizex = 1, int sizey = 1);
-  void DrawCharacterToPreview(char c);
-  void DrawCharacterToPreview(const std::vector<uint8_t>& text);
-
-  void DrawStringToPreview(std::string str);
   void DrawMessagePreview();
   std::string DisplayTextOverflowError(int pos, bool bank);
 
@@ -70,34 +62,25 @@ class MessageEditor : public Editor {
 
  private:
   Rom* rom_;
-  bool skip_next = false;
   bool data_loaded_ = false;
   bool case_sensitive_ = false;
   bool match_whole_word_ = false;
-  bool export_expanded_messages_ = false;
-
-  int text_line_ = 0;
-  int text_position_ = 0;
-  int shown_lines_ = 0;
 
   std::string expanded_message_address_ = "";
   std::string search_text_ = "";
 
-  std::array<uint8_t, kWidthArraySize> width_array = {0};
-  std::vector<uint8_t> font_gfx16_data_;
   std::array<uint8_t, 0x4000> raw_font_gfx_data_;
-  std::vector<uint8_t> current_font_gfx16_data_;
   std::vector<std::string> parsed_messages_;
   std::vector<MessageData> list_of_texts_;
-  std::vector<DictionaryEntry> all_dictionaries_;
 
   MessageData current_message_;
+  MessagePreview message_preview_;
 
   gfx::Bitmap font_gfx_bitmap_;
   gfx::Bitmap current_font_gfx16_bitmap_;
   gfx::SnesPalette font_preview_colors_;
 
-  gui::Canvas font_gfx_canvas_{"##FontGfxCanvas", ImVec2(128, 128)};
+  gui::Canvas font_gfx_canvas_{"##FontGfxCanvas", ImVec2(256, 256)};
   gui::Canvas current_font_gfx16_canvas_{"##CurrentMessageGfx",
                                          ImVec2(172 * 2, 4096)};