dll/win32/riched20/context.c

   1 /*
   2  * RichEdit - Operation context functions
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "editor.h"
  22
  23 void ME_InitContext(ME_Context *c, ME_TextEditor *editor, HDC hDC)
  24 {
  25   c->nSequence = editor->nSequence++;
  26   c->hDC = hDC;
  27   c->editor = editor;
  28   c->pt.x = 0;
  29   c->pt.y = 0;
  30   c->hbrMargin = CreateSolidBrush(RGB(224,224,224));
  31   c->rcView = editor->rcFormat;
  32   if (hDC) {
  33       c->dpi.cx = GetDeviceCaps(hDC, LOGPIXELSX);
  34       c->dpi.cy = GetDeviceCaps(hDC, LOGPIXELSY);
  35   } else {
  36       c->dpi.cx = c->dpi.cy = 96;
  37   }
  38   if (editor->nAvailWidth)
  39       c->nAvailWidth = ME_twips2pointsX(c, editor->nAvailWidth);
  40   else
  41       c->nAvailWidth = c->rcView.right - c->rcView.left;
  42 }
  43
  44 void ME_DestroyContext(ME_Context *c)
  45 {
  46   if (c->hDC) ITextHost_TxReleaseDC(c->editor->texthost, c->hDC);
  47   DeleteObject(c->hbrMargin);
  48 }