(svn r1894) - Codechange: cleaned up the console a bit, wholly unified handling of text with that of editboxes

- Codechange: Introduction of Textbuf struct which not only holds physical data as length but also pixel-constrains (width) and information about the caret
- Codechange: Move Clipboard function to OS specific file. Currently only Windows has clipboard actions
- Feature: Editboxes, console and exit screen also accept the numeric-enter as a yes
- Feature: Navigation through text with cursor keys is possible, as well as arbitrary insertion (also paste) and deletion; both backspace and del keys. Functions DeleteTextBufferChar, InsertTextBufferChar and InsertTextBufferClipboard handle input and deletion. Navigation is done through MoveTextBufferPos.
- Fix: OTTD crash when opening 'add server' editbox
- CodeChange: fix up some stringwidth calculations in gfx.c. You can get the width in pixels of a character by calling GetCharacterWidth().

1 files changed, 11 insertions, 1 deletions

diff --git a/gui.h b/gui.h
index 0038f5152..dff7b535d 100644
--- a/gui.h
+++ b/gui.h
@@ -64,6 +64,7 @@ void PlaceProc_LevelLand(uint tile);
 void ShowTerraformToolbar(void);
 
 /* misc_gui.c */
+VARDEF Window *_editbox_win; // pointer to querystringwindow to prevent scrolling when focussed
 void PlaceLandBlockInfo(void);
 void ShowAboutWindow(void);
 void ShowBuildTreesToolbar(void);
@@ -86,13 +87,22 @@ void ShowExtraViewPortWindow(void);
 void SetVScrollCount(Window *w, int num);
 void SetVScroll2Count(Window *w, int num);
 void SetHScrollCount(Window *w, int num);
-int HandleEditBoxKey(Window *w, int wid, WindowEvent *we);
 
 void ShowCheatWindow(void);
 void AskForNewGameToStart(void);
 
 void DrawEditBox(Window *w, int wid);
 void HandleEditBox(Window *w, int wid);
+int HandleEditBoxKey(Window *w, int wid, WindowEvent *we);
+bool HandleCaret(Textbuf *tb);
+
+bool DeleteTextBufferChar(Textbuf *tb, int delmode);
+bool InsertTextBufferChar(Textbuf *tb, byte key);
+bool InsertTextBufferClipboard(Textbuf *tb);
+bool MoveTextBufferPos(Textbuf *tb, int navmode);
+void UpdateTextBufferSize(Textbuf *tb);
+/* IS_INT_INSIDE = filter for ascii-function codes like BELL and so on [we need an special filter here later] */
+static inline bool IsValidAsciiChar(byte key) {return IS_INT_INSIDE(key, ' ', 256);}
 
 void BuildFileList(void);
 void SetFiosType(const byte fiostype);