richedit: Make the ME_GetCursorOfs function more flexible.

This function will make it easier to work with ME_Cursor objects, which
should be used in a lot of places instead of character offsets (which
often require seeking through the linked lists to perform operations
with).

dlls/riched20/caret.c

@@ -29,8 +29,8 @@ ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs);
 
 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
 {
-  *from = ME_GetCursorOfs(editor, 0);
-  *to =   ME_GetCursorOfs(editor, 1);
+  *from = ME_GetCursorOfs(&editor->pCursors[0]);
+  *to =   ME_GetCursorOfs(&editor->pCursors[1]);
   
   if (*from > *to)
   {
@@ -426,8 +426,8 @@ BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
   assert(nCursor>=0 && nCursor<editor->nCursors);
   /* text operations set modified state */
   editor->nModifyStep = 1;
-  return ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars,
-                               FALSE);
+  return ME_InternalDeleteText(editor, ME_GetCursorOfs(&editor->pCursors[nCursor]),
+                               nChars, FALSE);
 }
 
 static ME_DisplayItem *
@@ -807,11 +807,10 @@ ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
   editor->pCursors[3] = editor->pCursors[1];
 }
 
-int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
+int ME_GetCursorOfs(const ME_Cursor *cursor)
 {
-  ME_Cursor *pCursor = &editor->pCursors[nCursor];
-  return pCursor->pPara->member.para.nCharOfs
-         + pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
+  return cursor->pPara->member.para.nCharOfs
+         + cursor->pRun->member.run.nCharOfs + cursor->nOffset;
 }
 
 /* Helper function for ME_FindPixelPos to find paragraph within tables */
@@ -1019,9 +1018,9 @@ static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
   int curOfs, anchorStartOfs, anchorEndOfs;
   if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
       return;
-  curOfs = ME_GetCursorOfs(editor, 0);
-  anchorStartOfs = ME_GetCursorOfs(editor, 3);
-  anchorEndOfs = ME_GetCursorOfs(editor, 2);
+  curOfs = ME_GetCursorOfs(&editor->pCursors[0]);
+  anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]);
+  anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]);
 
   tmp_cursor = editor->pCursors[0];
   editor->pCursors[0] = editor->pCursors[2];
@@ -1499,7 +1498,8 @@ BOOL ME_IsSelection(ME_TextEditor *editor)
 
 static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
 {
-  int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
+  int cdir = ME_GetCursorOfs(&editor->pCursors[0])
+             - ME_GetCursorOfs(&editor->pCursors[1]);
 
   if (cdir*dir>0)
     return 0;

dlls/riched20/editor.c

@@ -1013,8 +1013,8 @@ void ME_RTFSpecialCharHook(RTF_Info *info)
           info->editor->pCursors[1].pRun = run;
           info->editor->pCursors[1].pPara = ME_GetParagraph(run);
           info->editor->pCursors[1].nOffset = 0;
-          nOfs = ME_GetCursorOfs(info->editor, 1);
-          nChars = ME_GetCursorOfs(info->editor, 0) - nOfs;
+          nOfs = ME_GetCursorOfs(&info->editor->pCursors[1]);
+          nChars = ME_GetCursorOfs(&info->editor->pCursors[0]) - nOfs;
           ME_InternalDeleteText(info->editor, nOfs, nChars, TRUE);
         }
 
@@ -1516,8 +1516,8 @@ static LRESULT ME_StreamIn(ME_TextEditor *editor, DWORD format, EDITSTREAM *stre
           editor->pCursors[1].pPara = para;
           editor->pCursors[1].pRun = ME_FindItemFwd(para, diRun);
           editor->pCursors[1].nOffset = 0;
-          nOfs = ME_GetCursorOfs(editor, 1);
-          nChars = ME_GetCursorOfs(editor, 0) - nOfs;
+          nOfs = ME_GetCursorOfs(&editor->pCursors[1]);
+          nChars = ME_GetCursorOfs(&editor->pCursors[0]) - nOfs;
           ME_InternalDeleteText(editor, nOfs, nChars, TRUE);
           if (parser.tableDef)
             parser.tableDef->tableRowStart = NULL;
@@ -2352,7 +2352,7 @@ static LRESULT ME_Char(ME_TextEditor *editor, WPARAM charCode,
       para = cursor.pPara;
       if (ME_IsSelection(editor) &&
           cursor.pRun->member.run.nCharOfs + cursor.nOffset == 0 &&
-          to == ME_GetCursorOfs(editor, 0) &&
+          to == ME_GetCursorOfs(&editor->pCursors[0]) &&
           para->member.para.prev_para->type == diParagraph)
       {
         para = para->member.para.prev_para;
@@ -3675,14 +3675,14 @@ LRESULT ME_HandleMessage(ME_TextEditor *editor, UINT msg, WPARAM wParam,
   case EM_LINEFROMCHAR:
   {
     if (wParam == -1)
-      return ME_RowNumberFromCharOfs(editor, ME_GetCursorOfs(editor, 1));
+      return ME_RowNumberFromCharOfs(editor, ME_GetCursorOfs(&editor->pCursors[1]));
     else
       return ME_RowNumberFromCharOfs(editor, wParam);
   }
   case EM_EXLINEFROMCHAR:
   {
     if (lParam == -1)
-      return ME_RowNumberFromCharOfs(editor, ME_GetCursorOfs(editor,1));
+      return ME_RowNumberFromCharOfs(editor, ME_GetCursorOfs(&editor->pCursors[1]));
     else    
       return ME_RowNumberFromCharOfs(editor, lParam);
   }
@@ -4171,7 +4171,7 @@ LRESULT ME_HandleMessage(ME_TextEditor *editor, UINT msg, WPARAM wParam,
     return 0;
   case WM_IME_STARTCOMPOSITION:
   {
-    editor->imeStartIndex=ME_GetCursorOfs(editor,0);
+    editor->imeStartIndex=ME_GetCursorOfs(&editor->pCursors[0]);
     ME_DeleteSelection(editor);
     ME_CommitUndo(editor);
     ME_UpdateRepaint(editor);

dlls/riched20/editor.h

@@ -166,7 +166,7 @@ void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor);
 BOOL ME_ArrowKey(ME_TextEditor *ed, int nVKey, BOOL extend, BOOL ctrl);
 
-int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor);
+int ME_GetCursorOfs(const ME_Cursor *cursor);
 void ME_GetSelection(ME_TextEditor *editor, int *from, int *to);
 int ME_CountParagraphsBetween(ME_TextEditor *editor, int from, int to);
 BOOL ME_IsSelection(ME_TextEditor *editor);

dlls/riched20/table.c

@@ -551,8 +551,8 @@ void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow)
   ME_InvalidateSelection(editor);
   {
     int from, to;
-    from = ME_GetCursorOfs(editor, 0);
-    to = ME_GetCursorOfs(editor, 1);
+    from = ME_GetCursorOfs(&editor->pCursors[0]);
+    to = ME_GetCursorOfs(&editor->pCursors[1]);
     if (from <= to)
     {
       fromCursor = editor->pCursors[0];