void
ME_InvalidateFromOfs(ME_TextEditor *editor, int nCharOfs)
{
RECT rc;
int x, y, height;
ME_Cursor tmp;
ME_RunOfsFromCharOfs(editor, nCharOfs, &tmp.pRun, &tmp.nOffset);
ME_GetCursorCoordinates(editor, &tmp, &x, &y, &height);
rc.left = 0;
rc.top = y;
rc.bottom = y + height;
rc.right = editor->rcFormat.right;
InvalidateRect(editor->hWnd, &rc, FALSE);
}
int ME_SetSelection(ME_TextEditor *editor, int from, int to)
{
int selectionEnd = 0;
const int len = ME_GetTextLength(editor);
/* all negative values are effectively the same */
if (from < 0)
from = -1;
if (to < 0)
to = -1;
/* select all */
if (from == 0 && to == -1)
{
editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
editor->pCursors[1].nOffset = 0;
editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
editor->pCursors[0].nOffset = 0;
ME_InvalidateSelection(editor);
ME_ClearTempStyle(editor);
return len + 1;
}
/* if both values are equal and also out of bound, that means to */
/* put the selection at the end of the text */
if ((from == to) && (to < 0 || to > len))
{
selectionEnd = 1;
}
else
{
/* if from is negative and to is positive then selection is */
/* deselected and caret moved to end of the current selection */
if (from < 0)
{
int start, end;
ME_GetSelection(editor, &start, &end);
editor->pCursors[1] = editor->pCursors[0];
ME_Repaint(editor);
ME_ClearTempStyle(editor);
return end;
}
/* adjust to if it's a negative value */
if (to < 0)
to = len + 1;
/* flip from and to if they are reversed */
if (from>to)
{
int tmp = from;
from = to;
to = tmp;
}
/* after fiddling with the values, we find from > len && to > len */
if (from > len)
selectionEnd = 1;
/* special case with to too big */
else if (to > len)
to = len + 1;
}
if (selectionEnd)
{
editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0;
ME_InvalidateSelection(editor);
ME_ClearTempStyle(editor);
return len;
}
ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
return to;
}
/******************************************************************************
* ME_CursorFromCharOfs
*
* Converts a character offset (relative to the start of the document) to
* a cursor structure (which contains a run and a position relative to that
* run).
*/
void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
{
ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pPara,
&pCursor->pRun, &pCursor->nOffset);
}
