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wine/dlls/riched20/paint.c
Dylan Smith 46b84aed4a richedit: Added function to get selection cursors in order. 
Previously the only convenient way to get the start and end of the
selection was through offsets, which eventually need to get converted
back into items in the linked list storing the text.  The new function
will help with eliminating these inefficiencies.
2009-08-12 17:29:30 +02:00

1371 lines
46 KiB
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/*
* RichEdit - painting functions
*
* Copyright 2004 by Krzysztof Foltman
* Copyright 2005 by Phil Krylov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "editor.h"
WINE_DEFAULT_DEBUG_CHANNEL(richedit);
static void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph);
void ME_PaintContent(ME_TextEditor *editor, HDC hDC, BOOL bOnlyNew, const RECT *rcUpdate)
{
ME_DisplayItem *item;
ME_Context c;
int ys, ye;
HRGN oldRgn;
oldRgn = CreateRectRgn(0, 0, 0, 0);
if (!GetClipRgn(hDC, oldRgn))
{
DeleteObject(oldRgn);
oldRgn = NULL;
}
IntersectClipRect(hDC, rcUpdate->left, rcUpdate->top,
rcUpdate->right, rcUpdate->bottom);
editor->nSequence++;
ME_InitContext(&c, editor, hDC);
SetBkMode(hDC, TRANSPARENT);
ME_MoveCaret(editor);
item = editor->pBuffer->pFirst->next;
/* This context point is an offset for the paragraph positions stored
* during wrapping. It shouldn't be modified during painting. */
c.pt.x = c.rcView.left - editor->horz_si.nPos;
c.pt.y = c.rcView.top - editor->vert_si.nPos;
while(item != editor->pBuffer->pLast)
{
assert(item->type == diParagraph);
ys = c.pt.y + item->member.para.pt.y;
if (item->member.para.pCell
!= item->member.para.next_para->member.para.pCell)
{
ME_Cell *cell = NULL;
cell = &ME_FindItemBack(item->member.para.next_para, diCell)->member.cell;
ye = c.pt.y + cell->pt.y + cell->nHeight;
} else {
ye = ys + item->member.para.nHeight;
}
if (item->member.para.pCell && !(item->member.para.nFlags & MEPF_ROWEND) &&
item->member.para.pCell != item->member.para.prev_para->member.para.pCell)
{
/* the border shifts the text down */
ys -= item->member.para.pCell->member.cell.yTextOffset;
}
if (!bOnlyNew || (item->member.para.nFlags & MEPF_REPAINT))
{
/* Draw the pargraph if any of the paragraph is in the update region. */
if (ys < rcUpdate->bottom && ye > rcUpdate->top)
{
ME_DrawParagraph(&c, item);
/* Clear the repaint flag if the whole paragraph is in the
* update region. */
if (rcUpdate->top <= ys && rcUpdate->bottom >= ye)
item->member.para.nFlags &= ~MEPF_REPAINT;
}
}
item = item->member.para.next_para;
}
if (c.pt.y + editor->nTotalLength < c.rcView.bottom)
{
/* Fill space after the end of the text. */
RECT rc;
rc.top = c.pt.y + editor->nTotalLength;
rc.left = c.rcView.left;
rc.bottom = c.rcView.bottom;
rc.right = c.rcView.right;
if (bOnlyNew)
{
/* Only erase region drawn from previous call to ME_PaintContent */
if (editor->nTotalLength < editor->nLastTotalLength)
rc.bottom = c.pt.y + editor->nLastTotalLength;
else
SetRectEmpty(&rc);
}
IntersectRect(&rc, &rc, rcUpdate);
if (!IsRectEmpty(&rc))
FillRect(hDC, &rc, c.editor->hbrBackground);
}
if (editor->nTotalLength != editor->nLastTotalLength ||
editor->nTotalWidth != editor->nLastTotalWidth)
ME_SendRequestResize(editor, FALSE);
editor->nLastTotalLength = editor->nTotalLength;
editor->nLastTotalWidth = editor->nTotalWidth;
SelectClipRgn(hDC, oldRgn);
if (oldRgn)
DeleteObject(oldRgn);
c.hDC = NULL;
ME_DestroyContext(&c);
}
void ME_Repaint(ME_TextEditor *editor)
{
if (ME_WrapMarkedParagraphs(editor))
{
ME_UpdateScrollBar(editor);
FIXME("ME_Repaint had to call ME_WrapMarkedParagraphs\n");
}
if (!editor->bEmulateVersion10 || (editor->nEventMask & ENM_UPDATE))
ME_SendOldNotify(editor, EN_UPDATE);
ITextHost_TxViewChange(editor->texthost, TRUE);
}
void ME_UpdateRepaint(ME_TextEditor *editor)
{
/* Should be called whenever the contents of the control have changed */
BOOL wrappedParagraphs;
wrappedParagraphs = ME_WrapMarkedParagraphs(editor);
if (wrappedParagraphs)
ME_UpdateScrollBar(editor);
/* Ensure that the cursor is visible */
ME_EnsureVisible(editor, &editor->pCursors[0]);
/* send EN_CHANGE if the event mask asks for it */
if(editor->nEventMask & ENM_CHANGE)
{
editor->nEventMask &= ~ENM_CHANGE;
ME_SendOldNotify(editor, EN_CHANGE);
editor->nEventMask |= ENM_CHANGE;
}
ME_Repaint(editor);
ME_SendSelChange(editor);
}
void
ME_RewrapRepaint(ME_TextEditor *editor)
{
/* RewrapRepaint should be called whenever the control has changed in
* looks, but not content. Like resizing. */
ME_MarkAllForWrapping(editor);
ME_WrapMarkedParagraphs(editor);
ME_UpdateScrollBar(editor);
ME_Repaint(editor);
}
int ME_twips2pointsX(ME_Context *c, int x)
{
if (c->editor->nZoomNumerator == 0)
return x * c->dpi.cx / 1440;
else
return x * c->dpi.cx * c->editor->nZoomNumerator / 1440 / c->editor->nZoomDenominator;
}
int ME_twips2pointsY(ME_Context *c, int y)
{
if (c->editor->nZoomNumerator == 0)
return y * c->dpi.cy / 1440;
else
return y * c->dpi.cy * c->editor->nZoomNumerator / 1440 / c->editor->nZoomDenominator;
}
static void ME_HighlightSpace(ME_Context *c, int x, int y, LPCWSTR szText,
int nChars, ME_Style *s, int width,
int nSelFrom, int nSelTo, int ymin, int cy)
{
HDC hDC = c->hDC;
HGDIOBJ hOldFont = NULL;
SIZE sz;
int selWidth;
/* Only highlight if there is a selection in the run and when
* EM_HIDESELECTION is not being used to hide the selection. */
if (nSelFrom >= nChars || nSelTo < 0 || nSelFrom >= nSelTo
|| c->editor->bHideSelection)
return;
hOldFont = ME_SelectStyleFont(c, s);
if (width <= 0)
{
GetTextExtentPoint32W(hDC, szText, nChars, &sz);
width = sz.cx;
}
if (nSelFrom < 0) nSelFrom = 0;
if (nSelTo > nChars) nSelTo = nChars;
GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
x += sz.cx;
if (nSelTo != nChars)
{
GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
selWidth = sz.cx;
} else {
selWidth = width - sz.cx;
}
ME_UnselectStyleFont(c, s, hOldFont);
if (c->editor->bEmulateVersion10)
PatBlt(hDC, x, ymin, selWidth, cy, DSTINVERT);
else
{
RECT rect;
HBRUSH hBrush;
rect.left = x;
rect.top = ymin;
rect.right = x + selWidth;
rect.bottom = ymin + cy;
hBrush = CreateSolidBrush(ITextHost_TxGetSysColor(c->editor->texthost,
COLOR_HIGHLIGHT));
FillRect(hDC, &rect, hBrush);
DeleteObject(hBrush);
}
}
static void ME_DrawTextWithStyle(ME_Context *c, int x, int y, LPCWSTR szText,
int nChars, ME_Style *s, int width,
int nSelFrom, int nSelTo, int ymin, int cy)
{
HDC hDC = c->hDC;
HGDIOBJ hOldFont;
COLORREF rgbOld;
int yOffset = 0, yTwipsOffset = 0;
SIZE sz;
COLORREF rgb;
HPEN hPen = NULL, hOldPen = NULL;
BOOL bHighlightedText = (nSelFrom < nChars && nSelTo >= 0
&& nSelFrom < nSelTo && !c->editor->bHideSelection);
int xSelStart = x, xSelEnd = x;
int *lpDx = NULL;
/* lpDx is only needed for tabs to make sure the underline done automatically
* by the font extends to the end of the tab. Tabs are always stored as
* a single character run, so we can handle this case separately, since
* otherwise lpDx would need to specify the lengths of each character. */
if (width && nChars == 1)
lpDx = &width; /* Make sure underline for tab extends across tab space */
hOldFont = ME_SelectStyleFont(c, s);
if ((s->fmt.dwMask & s->fmt.dwEffects) & CFM_OFFSET) {
yTwipsOffset = s->fmt.yOffset;
}
if ((s->fmt.dwMask & s->fmt.dwEffects) & (CFM_SUPERSCRIPT | CFM_SUBSCRIPT)) {
if (s->fmt.dwEffects & CFE_SUPERSCRIPT) yTwipsOffset = s->fmt.yHeight/3;
if (s->fmt.dwEffects & CFE_SUBSCRIPT) yTwipsOffset = -s->fmt.yHeight/12;
}
if (yTwipsOffset)
yOffset = ME_twips2pointsY(c, yTwipsOffset);
if ((s->fmt.dwMask & CFM_LINK) && (s->fmt.dwEffects & CFE_LINK))
rgb = RGB(0,0,255);
else if ((s->fmt.dwMask & CFM_COLOR) && (s->fmt.dwEffects & CFE_AUTOCOLOR))
rgb = ITextHost_TxGetSysColor(c->editor->texthost, COLOR_WINDOWTEXT);
else
rgb = s->fmt.crTextColor;
/* Determine the area that is selected in the run. */
GetTextExtentPoint32W(hDC, szText, nChars, &sz);
/* Treat width as an optional parameter. We can get the width from the
* text extent of the string if it isn't specified. */
if (!width) width = sz.cx;
if (bHighlightedText)
{
if (nSelFrom <= 0)
{
nSelFrom = 0;
}
else
{
GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
xSelStart = x + sz.cx;
}
if (nSelTo >= nChars)
{
nSelTo = nChars;
xSelEnd = x + width;
}
else
{
GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
xSelEnd = xSelStart + sz.cx;
}
}
/* Choose the pen type for underlining the text. */
if (s->fmt.dwMask & CFM_UNDERLINETYPE)
{
switch (s->fmt.bUnderlineType)
{
case CFU_UNDERLINE:
case CFU_UNDERLINEWORD: /* native seems to map it to simple underline (MSDN) */
case CFU_UNDERLINEDOUBLE: /* native seems to map it to simple underline (MSDN) */
hPen = CreatePen(PS_SOLID, 1, rgb);
break;
case CFU_UNDERLINEDOTTED:
hPen = CreatePen(PS_DOT, 1, rgb);
break;
default:
WINE_FIXME("Unknown underline type (%u)\n", s->fmt.bUnderlineType);
/* fall through */
case CFU_CF1UNDERLINE: /* this type is supported in the font, do nothing */
case CFU_UNDERLINENONE:
hPen = NULL;
break;
}
if (hPen)
{
hOldPen = SelectObject(hDC, hPen);
}
}
rgbOld = SetTextColor(hDC, rgb);
if (bHighlightedText && !c->editor->bEmulateVersion10)
{
COLORREF rgbBackOld;
RECT dim;
/* FIXME: should use textmetrics info for Descent info */
if (hPen)
MoveToEx(hDC, x, y - yOffset + 1, NULL);
if (xSelStart > x)
{
ExtTextOutW(hDC, x, y-yOffset, 0, NULL, szText, nSelFrom, NULL);
if (hPen)
LineTo(hDC, xSelStart, y - yOffset + 1);
}
dim.top = ymin;
dim.bottom = ymin + cy;
dim.left = xSelStart;
dim.right = xSelEnd;
SetTextColor(hDC, ITextHost_TxGetSysColor(c->editor->texthost,
COLOR_HIGHLIGHTTEXT));
rgbBackOld = SetBkColor(hDC, ITextHost_TxGetSysColor(c->editor->texthost,
COLOR_HIGHLIGHT));
ExtTextOutW(hDC, xSelStart, y-yOffset, ETO_OPAQUE, &dim,
szText+nSelFrom, nSelTo-nSelFrom, lpDx);
if (hPen)
LineTo(hDC, xSelEnd, y - yOffset + 1);
SetBkColor(hDC, rgbBackOld);
if (xSelEnd < x + width)
{
SetTextColor(hDC, rgb);
ExtTextOutW(hDC, xSelEnd, y-yOffset, 0, NULL, szText+nSelTo,
nChars-nSelTo, NULL);
if (hPen)
LineTo(hDC, x + width, y - yOffset + 1);
}
}
else
{
ExtTextOutW(hDC, x, y-yOffset, 0, NULL, szText, nChars, lpDx);
/* FIXME: should use textmetrics info for Descent info */
if (hPen)
{
MoveToEx(hDC, x, y - yOffset + 1, NULL);
LineTo(hDC, x + width, y - yOffset + 1);
}
if (bHighlightedText) /* v1.0 inverts the selection */
{
PatBlt(hDC, xSelStart, ymin, xSelEnd-xSelStart, cy, DSTINVERT);
}
}
if (hPen)
{
SelectObject(hDC, hOldPen);
DeleteObject(hPen);
}
SetTextColor(hDC, rgbOld);
ME_UnselectStyleFont(c, s, hOldFont);
}
static void ME_DebugWrite(HDC hDC, const POINT *pt, LPCWSTR szText) {
int align = SetTextAlign(hDC, TA_LEFT|TA_TOP);
HGDIOBJ hFont = SelectObject(hDC, GetStockObject(DEFAULT_GUI_FONT));
COLORREF color = SetTextColor(hDC, RGB(128,128,128));
TextOutW(hDC, pt->x, pt->y, szText, lstrlenW(szText));
SelectObject(hDC, hFont);
SetTextAlign(hDC, align);
SetTextColor(hDC, color);
}
static void ME_DrawRun(ME_Context *c, int x, int y, ME_DisplayItem *rundi, ME_Paragraph *para)
{
ME_Run *run = &rundi->member.run;
ME_DisplayItem *start;
int runofs = run->nCharOfs+para->nCharOfs;
int nSelFrom, nSelTo;
const WCHAR wszSpace[] = {' ', 0};
if (run->nFlags & MERF_HIDDEN)
return;
start = ME_FindItemBack(rundi, diStartRow);
ME_GetSelectionOfs(c->editor, &nSelFrom, &nSelTo);
/* Draw selected end-of-paragraph mark */
if (run->nFlags & MERF_ENDPARA)
{
if (runofs >= nSelFrom && runofs < nSelTo)
{
ME_HighlightSpace(c, x, y, wszSpace, 1, run->style, 0, 0, 1,
c->pt.y + para->pt.y + start->member.row.pt.y,
start->member.row.nHeight);
}
return;
}
if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
{
/* wszSpace is used instead of the tab character because otherwise
* an unwanted symbol can be inserted instead. */
ME_DrawTextWithStyle(c, x, y, wszSpace, 1, run->style, run->nWidth,
nSelFrom-runofs, nSelTo-runofs,
c->pt.y + para->pt.y + start->member.row.pt.y,
start->member.row.nHeight);
return;
}
if (run->nFlags & MERF_GRAPHICS)
ME_DrawOLE(c, x, y, run, para, (runofs >= nSelFrom) && (runofs < nSelTo));
else
{
if (c->editor->cPasswordMask)
{
ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask, run->strText->nLen);
ME_DrawTextWithStyle(c, x, y,
szMasked->szData, szMasked->nLen, run->style, run->nWidth,
nSelFrom-runofs,nSelTo-runofs,
c->pt.y + para->pt.y + start->member.row.pt.y,
start->member.row.nHeight);
ME_DestroyString(szMasked);
}
else
ME_DrawTextWithStyle(c, x, y,
run->strText->szData, run->strText->nLen, run->style, run->nWidth,
nSelFrom-runofs,nSelTo-runofs,
c->pt.y + para->pt.y + start->member.row.pt.y,
start->member.row.nHeight);
}
}
static const struct {unsigned width_num : 4, width_den : 4, pen_style : 4, dble : 1;} border_details[] = {
/* none */ {0, 1, PS_SOLID, FALSE},
/* 3/4 */ {3, 4, PS_SOLID, FALSE},
/* 1 1/2 */ {3, 2, PS_SOLID, FALSE},
/* 2 1/4 */ {9, 4, PS_SOLID, FALSE},
/* 3 */ {3, 1, PS_SOLID, FALSE},
/* 4 1/2 */ {9, 2, PS_SOLID, FALSE},
/* 6 */ {6, 1, PS_SOLID, FALSE},
/* 3/4 double */ {3, 4, PS_SOLID, TRUE},
/* 1 1/2 double */ {3, 2, PS_SOLID, TRUE},
/* 2 1/4 double */ {9, 4, PS_SOLID, TRUE},
/* 3/4 gray */ {3, 4, PS_DOT /* FIXME */, FALSE},
/* 1 1/2 dashed */ {3, 2, PS_DASH, FALSE},
};
static const COLORREF pen_colors[16] = {
/* Black */ RGB(0x00, 0x00, 0x00), /* Blue */ RGB(0x00, 0x00, 0xFF),
/* Cyan */ RGB(0x00, 0xFF, 0xFF), /* Green */ RGB(0x00, 0xFF, 0x00),
/* Magenta */ RGB(0xFF, 0x00, 0xFF), /* Red */ RGB(0xFF, 0x00, 0x00),
/* Yellow */ RGB(0xFF, 0xFF, 0x00), /* White */ RGB(0xFF, 0xFF, 0xFF),
/* Dark blue */ RGB(0x00, 0x00, 0x80), /* Dark cyan */ RGB(0x00, 0x80, 0x80),
/* Dark green */ RGB(0x00, 0x80, 0x80), /* Dark magenta */ RGB(0x80, 0x00, 0x80),
/* Dark red */ RGB(0x80, 0x00, 0x00), /* Dark yellow */ RGB(0x80, 0x80, 0x00),
/* Dark gray */ RGB(0x80, 0x80, 0x80), /* Light gray */ RGB(0xc0, 0xc0, 0xc0),
};
static int ME_GetBorderPenWidth(ME_TextEditor* editor, int idx)
{
int width;
if (editor->nZoomNumerator == 0)
{
width = border_details[idx].width_num + border_details[idx].width_den / 2;
width /= border_details[idx].width_den;
}
else
{
width = border_details[idx].width_num * editor->nZoomNumerator;
width += border_details[idx].width_den * editor->nZoomNumerator / 2;
width /= border_details[idx].width_den * editor->nZoomDenominator;
}
return width;
}
int ME_GetParaBorderWidth(ME_TextEditor* editor, int flags)
{
int idx = (flags >> 8) & 0xF;
int width;
if (idx >= sizeof(border_details) / sizeof(border_details[0]))
{
FIXME("Unsupported border value %d\n", idx);
return 0;
}
width = ME_GetBorderPenWidth(editor, idx);
if (border_details[idx].dble) width = width * 2 + 1;
return width;
}
int ME_GetParaLineSpace(ME_Context* c, ME_Paragraph* para)
{
int sp = 0, ls = 0;
if (!(para->pFmt->dwMask & PFM_LINESPACING)) return 0;
/* FIXME: how to compute simply the line space in ls ??? */
/* FIXME: does line spacing include the line itself ??? */
switch (para->pFmt->bLineSpacingRule)
{
case 0: sp = ls; break;
case 1: sp = (3 * ls) / 2; break;
case 2: sp = 2 * ls; break;
case 3: sp = ME_twips2pointsY(c, para->pFmt->dyLineSpacing); if (sp < ls) sp = ls; break;
case 4: sp = ME_twips2pointsY(c, para->pFmt->dyLineSpacing); break;
case 5: sp = para->pFmt->dyLineSpacing / 20; break;
default: FIXME("Unsupported spacing rule value %d\n", para->pFmt->bLineSpacingRule);
}
if (c->editor->nZoomNumerator == 0)
return sp;
else
return sp * c->editor->nZoomNumerator / c->editor->nZoomDenominator;
}
static void ME_DrawParaDecoration(ME_Context* c, ME_Paragraph* para, int y, RECT* bounds)
{
int idx, border_width, top_border, bottom_border;
RECT rc;
BOOL hasParaBorder;
SetRectEmpty(bounds);
if (!(para->pFmt->dwMask & (PFM_BORDER | PFM_SPACEBEFORE | PFM_SPACEAFTER))) return;
border_width = top_border = bottom_border = 0;
idx = (para->pFmt->wBorders >> 8) & 0xF;
hasParaBorder = (!(c->editor->bEmulateVersion10 &&
para->pFmt->dwMask & PFM_TABLE &&
para->pFmt->wEffects & PFE_TABLE) &&
(para->pFmt->dwMask & PFM_BORDER) &&
idx != 0 &&
(para->pFmt->wBorders & 0xF));
if (hasParaBorder)
{
/* FIXME: wBorders is not stored as MSDN says in v1.0 - 4.1 of richedit
* controls. It actually stores the paragraph or row border style. Although
* the value isn't used for drawing, it is used for streaming out rich text.
*
* wBorders stores the border style for each side (top, left, bottom, right)
* using nibble (4 bits) to store each border style. The rich text format
* control words, and their associated value are the following:
* \brdrdash 0
* \brdrdashsm 1
* \brdrdb 2
* \brdrdot 3
* \brdrhair 4
* \brdrs 5
* \brdrth 6
* \brdrtriple 7
*
* The order of the sides stored actually differs from v1.0 to 3.0 and v4.1.
* The mask corresponding to each side for the version are the following:
* mask v1.0-3.0 v4.1
* 0x000F top left
* 0x00F0 left top
* 0x0F00 bottom right
* 0xF000 right bottom
*/
if (para->pFmt->wBorders & 0x00B0)
FIXME("Unsupported border flags %x\n", para->pFmt->wBorders);
border_width = ME_GetParaBorderWidth(c->editor, para->pFmt->wBorders);
if (para->pFmt->wBorders & 4) top_border = border_width;
if (para->pFmt->wBorders & 8) bottom_border = border_width;
}
if (para->pFmt->dwMask & PFM_SPACEBEFORE)
{
rc.left = c->rcView.left;
rc.right = c->rcView.right;
rc.top = y;
bounds->top = ME_twips2pointsY(c, para->pFmt->dySpaceBefore);
rc.bottom = y + bounds->top + top_border;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
}
if (para->pFmt->dwMask & PFM_SPACEAFTER)
{
rc.left = c->rcView.left;
rc.right = c->rcView.right;
rc.bottom = y + para->nHeight;
bounds->bottom = ME_twips2pointsY(c, para->pFmt->dySpaceAfter);
rc.top = rc.bottom - bounds->bottom - bottom_border;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
}
/* Native richedit doesn't support paragraph borders in v1.0 - 4.1,
* but might support it in later versions. */
if (hasParaBorder) {
int pen_width, rightEdge;
COLORREF pencr;
HPEN pen = NULL, oldpen = NULL;
POINT pt;
if (para->pFmt->wBorders & 64) /* autocolor */
pencr = ITextHost_TxGetSysColor(c->editor->texthost,
COLOR_WINDOWTEXT);
else
pencr = pen_colors[(para->pFmt->wBorders >> 12) & 0xF];
rightEdge = c->pt.x + max(c->editor->sizeWindow.cx,
c->editor->nTotalWidth);
pen_width = ME_GetBorderPenWidth(c->editor, idx);
pen = CreatePen(border_details[idx].pen_style, pen_width, pencr);
oldpen = SelectObject(c->hDC, pen);
MoveToEx(c->hDC, 0, 0, &pt);
/* before & after spaces are not included in border */
/* helper to draw the double lines in case of corner */
#define DD(x) ((para->pFmt->wBorders & (x)) ? (pen_width + 1) : 0)
if (para->pFmt->wBorders & 1)
{
MoveToEx(c->hDC, c->pt.x, y + bounds->top, NULL);
LineTo(c->hDC, c->pt.x, y + para->nHeight - bounds->bottom);
if (border_details[idx].dble) {
rc.left = c->pt.x + 1;
rc.right = rc.left + border_width;
rc.top = y + bounds->top;
rc.bottom = y + para->nHeight - bounds->bottom;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
MoveToEx(c->hDC, c->pt.x + pen_width + 1, y + bounds->top + DD(4), NULL);
LineTo(c->hDC, c->pt.x + pen_width + 1, y + para->nHeight - bounds->bottom - DD(8));
}
bounds->left += border_width;
}
if (para->pFmt->wBorders & 2)
{
MoveToEx(c->hDC, rightEdge - 1, y + bounds->top, NULL);
LineTo(c->hDC, rightEdge - 1, y + para->nHeight - bounds->bottom);
if (border_details[idx].dble) {
rc.left = rightEdge - pen_width - 1;
rc.right = rc.left + pen_width;
rc.top = y + bounds->top;
rc.bottom = y + para->nHeight - bounds->bottom;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
MoveToEx(c->hDC, rightEdge - 1 - pen_width - 1, y + bounds->top + DD(4), NULL);
LineTo(c->hDC, rightEdge - 1 - pen_width - 1, y + para->nHeight - bounds->bottom - DD(8));
}
bounds->right += border_width;
}
if (para->pFmt->wBorders & 4)
{
MoveToEx(c->hDC, c->pt.x, y + bounds->top, NULL);
LineTo(c->hDC, rightEdge, y + bounds->top);
if (border_details[idx].dble) {
MoveToEx(c->hDC, c->pt.x + DD(1), y + bounds->top + pen_width + 1, NULL);
LineTo(c->hDC, rightEdge - DD(2), y + bounds->top + pen_width + 1);
}
bounds->top += border_width;
}
if (para->pFmt->wBorders & 8)
{
MoveToEx(c->hDC, c->pt.x, y + para->nHeight - bounds->bottom - 1, NULL);
LineTo(c->hDC, rightEdge, y + para->nHeight - bounds->bottom - 1);
if (border_details[idx].dble) {
MoveToEx(c->hDC, c->pt.x + DD(1), y + para->nHeight - bounds->bottom - 1 - pen_width - 1, NULL);
LineTo(c->hDC, rightEdge - DD(2), y + para->nHeight - bounds->bottom - 1 - pen_width - 1);
}
bounds->bottom += border_width;
}
#undef DD
MoveToEx(c->hDC, pt.x, pt.y, NULL);
SelectObject(c->hDC, oldpen);
DeleteObject(pen);
}
}
static void ME_DrawTableBorders(ME_Context *c, ME_DisplayItem *paragraph)
{
ME_Paragraph *para = &paragraph->member.para;
if (!c->editor->bEmulateVersion10) /* v4.1 */
{
if (para->pCell)
{
RECT rc;
ME_Cell *cell = &para->pCell->member.cell;
ME_DisplayItem *paraAfterRow;
HPEN pen, oldPen;
LOGBRUSH logBrush;
HBRUSH brush;
COLORREF color;
POINT oldPt;
int width;
BOOL atTop = (para->pCell != para->prev_para->member.para.pCell);
BOOL atBottom = (para->pCell != para->next_para->member.para.pCell);
int top = c->pt.y + (atTop ? cell->pt.y : para->pt.y);
int bottom = (atBottom ?
c->pt.y + cell->pt.y + cell->nHeight :
top + para->nHeight + (atTop ? cell->yTextOffset : 0));
rc.left = c->pt.x + cell->pt.x;
rc.right = rc.left + cell->nWidth;
if (atTop) {
/* Erase gap before text if not all borders are the same height. */
width = max(ME_twips2pointsY(c, cell->border.top.width), 1);
rc.top = top + width;
width = cell->yTextOffset - width;
rc.bottom = rc.top + width;
if (width) {
FillRect(c->hDC, &rc, c->editor->hbrBackground);
}
}
/* Draw cell borders.
* The order borders are draw in is left, top, bottom, right in order
* to be consistent with native richedit. This is noticeable from the
* overlap of borders of different colours. */
if (!(para->nFlags & MEPF_ROWEND)) {
rc.top = top;
rc.bottom = bottom;
if (cell->border.left.width > 0)
{
color = cell->border.left.colorRef;
width = max(ME_twips2pointsX(c, cell->border.left.width), 1);
} else {
color = RGB(192,192,192);
width = 1;
}
logBrush.lbStyle = BS_SOLID;
logBrush.lbColor = color;
logBrush.lbHatch = 0;
pen = ExtCreatePen(PS_GEOMETRIC|PS_SOLID|PS_ENDCAP_FLAT|PS_JOIN_MITER,
width, &logBrush, 0, NULL);
oldPen = SelectObject(c->hDC, pen);
MoveToEx(c->hDC, rc.left, rc.top, &oldPt);
LineTo(c->hDC, rc.left, rc.bottom);
SelectObject(c->hDC, oldPen);
DeleteObject(pen);
MoveToEx(c->hDC, oldPt.x, oldPt.y, NULL);
}
if (atTop) {
if (cell->border.top.width > 0)
{
brush = CreateSolidBrush(cell->border.top.colorRef);
width = max(ME_twips2pointsY(c, cell->border.top.width), 1);
} else {
brush = GetStockObject(LTGRAY_BRUSH);
width = 1;
}
rc.top = top;
rc.bottom = rc.top + width;
FillRect(c->hDC, &rc, brush);
if (cell->border.top.width > 0)
DeleteObject(brush);
}
/* Draw the bottom border if at the last paragraph in the cell, and when
* in the last row of the table. */
if (atBottom) {
int oldLeft = rc.left;
width = max(ME_twips2pointsY(c, cell->border.bottom.width), 1);
paraAfterRow = ME_GetTableRowEnd(paragraph)->member.para.next_para;
if (paraAfterRow->member.para.nFlags & MEPF_ROWSTART) {
ME_DisplayItem *nextEndCell;
nextEndCell = ME_FindItemBack(ME_GetTableRowEnd(paraAfterRow), diCell);
assert(nextEndCell && !nextEndCell->member.cell.next_cell);
rc.left = c->pt.x + nextEndCell->member.cell.pt.x;
/* FIXME: Native draws FROM the bottom of the table rather than
* TO the bottom of the table in this case, but just doing so here
* will cause the next row to erase the border. */
/*
rc.top = bottom;
rc.bottom = rc.top + width;
*/
}
if (rc.left < rc.right) {
if (cell->border.bottom.width > 0) {
brush = CreateSolidBrush(cell->border.bottom.colorRef);
} else {
brush = GetStockObject(LTGRAY_BRUSH);
}
rc.bottom = bottom;
rc.top = rc.bottom - width;
FillRect(c->hDC, &rc, brush);
if (cell->border.bottom.width > 0)
DeleteObject(brush);
}
rc.left = oldLeft;
}
/* Right border only drawn if at the end of the table row. */
if (!cell->next_cell->member.cell.next_cell &&
!(para->nFlags & MEPF_ROWSTART))
{
rc.top = top;
rc.bottom = bottom;
if (cell->border.right.width > 0) {
color = cell->border.right.colorRef;
width = max(ME_twips2pointsX(c, cell->border.right.width), 1);
} else {
color = RGB(192,192,192);
width = 1;
}
logBrush.lbStyle = BS_SOLID;
logBrush.lbColor = color;
logBrush.lbHatch = 0;
pen = ExtCreatePen(PS_GEOMETRIC|PS_SOLID|PS_ENDCAP_FLAT|PS_JOIN_MITER,
width, &logBrush, 0, NULL);
oldPen = SelectObject(c->hDC, pen);
MoveToEx(c->hDC, rc.right - 1, rc.top, &oldPt);
LineTo(c->hDC, rc.right - 1, rc.bottom);
SelectObject(c->hDC, oldPen);
DeleteObject(pen);
MoveToEx(c->hDC, oldPt.x, oldPt.y, NULL);
}
}
} else { /* v1.0 - 3.0 */
/* Draw simple table border */
if (para->pFmt->dwMask & PFM_TABLE && para->pFmt->wEffects & PFE_TABLE) {
HPEN pen = NULL, oldpen = NULL;
int i, firstX, startX, endX, rowY, rowBottom, nHeight;
POINT oldPt;
PARAFORMAT2 *pNextFmt;
pen = CreatePen(PS_SOLID, 0, para->border.top.colorRef);
oldpen = SelectObject(c->hDC, pen);
/* Find the start relative to the text */
firstX = c->pt.x + ME_FindItemFwd(paragraph, diRun)->member.run.pt.x;
/* Go back by the horizontal gap, which is stored in dxOffset */
firstX -= ME_twips2pointsX(c, para->pFmt->dxOffset);
/* The left edge, stored in dxStartIndent affected just the first edge */
startX = firstX - ME_twips2pointsX(c, para->pFmt->dxStartIndent);
rowY = c->pt.y + para->pt.y;
if (para->pFmt->dwMask & PFM_SPACEBEFORE)
rowY += ME_twips2pointsY(c, para->pFmt->dySpaceBefore);
nHeight = ME_FindItemFwd(paragraph, diStartRow)->member.row.nHeight;
rowBottom = rowY + nHeight;
/* Draw horizontal lines */
MoveToEx(c->hDC, firstX, rowY, &oldPt);
i = para->pFmt->cTabCount - 1;
endX = startX + ME_twips2pointsX(c, para->pFmt->rgxTabs[i] & 0x00ffffff) + 1;
LineTo(c->hDC, endX, rowY);
pNextFmt = para->next_para->member.para.pFmt;
/* The bottom of the row only needs to be drawn if the next row is
* not a table. */
if (!(pNextFmt && pNextFmt->dwMask & PFM_TABLE && pNextFmt->wEffects &&
para->nRows == 1))
{
/* Decrement rowBottom to draw the bottom line within the row, and
* to not draw over this line when drawing the vertical lines. */
rowBottom--;
MoveToEx(c->hDC, firstX, rowBottom, NULL);
LineTo(c->hDC, endX, rowBottom);
}
/* Draw vertical lines */
MoveToEx(c->hDC, firstX, rowY, NULL);
LineTo(c->hDC, firstX, rowBottom);
for (i = 0; i < para->pFmt->cTabCount; i++)
{
int rightBoundary = para->pFmt->rgxTabs[i] & 0x00ffffff;
endX = startX + ME_twips2pointsX(c, rightBoundary);
MoveToEx(c->hDC, endX, rowY, NULL);
LineTo(c->hDC, endX, rowBottom);
}
MoveToEx(c->hDC, oldPt.x, oldPt.y, NULL);
SelectObject(c->hDC, oldpen);
DeleteObject(pen);
}
}
}
static void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph)
{
int align = SetTextAlign(c->hDC, TA_BASELINE);
ME_DisplayItem *p;
ME_Run *run;
ME_Paragraph *para = NULL;
RECT rc, bounds;
int y;
int height = 0, baseline = 0, no=0;
BOOL visible = FALSE;
rc.left = c->pt.x;
rc.right = c->rcView.right;
assert(paragraph);
para = &paragraph->member.para;
y = c->pt.y + para->pt.y;
if (para->pCell)
{
ME_Cell *cell = &para->pCell->member.cell;
rc.left = c->pt.x + cell->pt.x;
rc.right = rc.left + cell->nWidth;
}
if (para->nFlags & MEPF_ROWSTART) {
ME_Cell *cell = &para->next_para->member.para.pCell->member.cell;
rc.right = c->pt.x + cell->pt.x;
} else if (para->nFlags & MEPF_ROWEND) {
ME_Cell *cell = &para->prev_para->member.para.pCell->member.cell;
rc.left = c->pt.x + cell->pt.x + cell->nWidth;
}
ME_DrawParaDecoration(c, para, y, &bounds);
y += bounds.top;
if (bounds.left || bounds.right) {
rc.left = max(rc.left, c->pt.x + bounds.left);
rc.right = min(rc.right, c->pt.x - bounds.right
+ max(c->editor->sizeWindow.cx,
c->editor->nTotalWidth));
}
for (p = paragraph->next; p != para->next_para; p = p->next)
{
switch(p->type) {
case diParagraph:
assert(FALSE);
break;
case diStartRow:
y += height;
rc.top = y;
if (para->nFlags & (MEPF_ROWSTART|MEPF_ROWEND)) {
rc.bottom = y + para->nHeight;
} else {
rc.bottom = y + p->member.row.nHeight;
}
visible = RectVisible(c->hDC, &rc);
if (visible) {
FillRect(c->hDC, &rc, c->editor->hbrBackground);
}
if (bounds.right)
{
/* If scrolled to the right past the end of the text, then
* there may be space to the right of the paragraph border. */
RECT rcAfterBrdr = rc;
rcAfterBrdr.left = rc.right + bounds.right;
rcAfterBrdr.right = c->rcView.right;
if (RectVisible(c->hDC, &rcAfterBrdr))
FillRect(c->hDC, &rcAfterBrdr, c->editor->hbrBackground);
}
if (me_debug)
{
const WCHAR wszRowDebug[] = {'r','o','w','[','%','d',']',0};
WCHAR buf[128];
POINT pt = c->pt;
wsprintfW(buf, wszRowDebug, no);
pt.y = 12+y;
ME_DebugWrite(c->hDC, &pt, buf);
}
height = p->member.row.nHeight;
baseline = p->member.row.nBaseline;
break;
case diRun:
assert(para);
run = &p->member.run;
if (visible && me_debug) {
RECT rc;
rc.left = c->pt.x + run->pt.x;
rc.right = rc.left + run->nWidth;
rc.top = c->pt.y + para->pt.y + run->pt.y;
rc.bottom = rc.bottom + height;
TRACE("rc = (%d, %d, %d, %d)\n", rc.left, rc.top, rc.right, rc.bottom);
if (run->nFlags & MERF_SKIPPED)
DrawFocusRect(c->hDC, &rc);
else
FrameRect(c->hDC, &rc, GetSysColorBrush(COLOR_GRAYTEXT));
}
if (visible)
ME_DrawRun(c, c->pt.x + run->pt.x,
c->pt.y + para->pt.y + run->pt.y + baseline, p, para);
if (me_debug)
{
/* I'm using %ls, hope wsprintfW is not going to use wrong (4-byte) WCHAR version */
const WCHAR wszRunDebug[] = {'[','%','d',':','%','x',']',' ','%','l','s',0};
WCHAR buf[2560];
POINT pt;
pt.x = c->pt.x + run->pt.x;
pt.y = c->pt.y + para->pt.y + run->pt.y;
wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
ME_DebugWrite(c->hDC, &pt, buf);
}
break;
case diCell:
/* Clear any space at the bottom of the cell after the text. */
if (para->nFlags & (MEPF_ROWSTART|MEPF_ROWEND))
break;
y += height;
rc.top = c->pt.y + para->pt.y + para->nHeight;
rc.bottom = c->pt.y + p->member.cell.pt.y + p->member.cell.nHeight;
if (RectVisible(c->hDC, &rc))
{
FillRect(c->hDC, &rc, c->editor->hbrBackground);
}
break;
default:
break;
}
no++;
}
ME_DrawTableBorders(c, paragraph);
SetTextAlign(c->hDC, align);
}
void ME_ScrollAbs(ME_TextEditor *editor, int x, int y)
{
BOOL bScrollBarIsVisible, bScrollBarWillBeVisible;
int scrollX = 0, scrollY = 0;
if (editor->horz_si.nPos != x) {
x = min(x, editor->horz_si.nMax);
x = max(x, editor->horz_si.nMin);
scrollX = editor->horz_si.nPos - x;
editor->horz_si.nPos = x;
if (editor->horz_si.nMax > 0xFFFF) /* scale to 16-bit value */
x = MulDiv(x, 0xFFFF, editor->horz_si.nMax);
ITextHost_TxSetScrollPos(editor->texthost, SB_HORZ, x, TRUE);
}
if (editor->vert_si.nPos != y) {
y = min(y, editor->vert_si.nMax - (int)editor->vert_si.nPage);
y = max(y, editor->vert_si.nMin);
scrollY = editor->vert_si.nPos - y;
editor->vert_si.nPos = y;
if (editor->vert_si.nMax > 0xFFFF) /* scale to 16-bit value */
y = MulDiv(y, 0xFFFF, editor->vert_si.nMax);
ITextHost_TxSetScrollPos(editor->texthost, SB_VERT, y, TRUE);
}
if (abs(scrollX) > editor->sizeWindow.cx ||
abs(scrollY) > editor->sizeWindow.cy)
ITextHost_TxInvalidateRect(editor->texthost, NULL, TRUE);
else
ITextHost_TxScrollWindowEx(editor->texthost, scrollX, scrollY,
&editor->rcFormat, &editor->rcFormat,
NULL, NULL, SW_INVALIDATE);
ME_Repaint(editor);
if (editor->hWnd)
{
LONG winStyle = GetWindowLongW(editor->hWnd, GWL_STYLE);
if (editor->styleFlags & WS_HSCROLL)
{
bScrollBarIsVisible = (winStyle & WS_HSCROLL) != 0;
bScrollBarWillBeVisible = (editor->nTotalWidth > editor->sizeWindow.cx
&& (editor->styleFlags & WS_HSCROLL))
|| (editor->styleFlags & ES_DISABLENOSCROLL);
if (bScrollBarIsVisible != bScrollBarWillBeVisible)
ITextHost_TxShowScrollBar(editor->texthost, SB_HORZ,
bScrollBarWillBeVisible);
}
if (editor->styleFlags & WS_VSCROLL)
{
bScrollBarIsVisible = (winStyle & WS_VSCROLL) != 0;
bScrollBarWillBeVisible = (editor->nTotalLength > editor->sizeWindow.cy
&& (editor->styleFlags & WS_VSCROLL)
&& (editor->styleFlags & ES_MULTILINE))
|| (editor->styleFlags & ES_DISABLENOSCROLL);
if (bScrollBarIsVisible != bScrollBarWillBeVisible)
ITextHost_TxShowScrollBar(editor->texthost, SB_VERT,
bScrollBarWillBeVisible);
}
}
ME_UpdateScrollBar(editor);
}
void ME_HScrollAbs(ME_TextEditor *editor, int x)
{
ME_ScrollAbs(editor, x, editor->vert_si.nPos);
}
void ME_VScrollAbs(ME_TextEditor *editor, int y)
{
ME_ScrollAbs(editor, editor->horz_si.nPos, y);
}
void ME_ScrollUp(ME_TextEditor *editor, int cy)
{
ME_VScrollAbs(editor, editor->vert_si.nPos - cy);
}
void ME_ScrollDown(ME_TextEditor *editor, int cy)
{
ME_VScrollAbs(editor, editor->vert_si.nPos + cy);
}
void ME_ScrollLeft(ME_TextEditor *editor, int cx)
{
ME_HScrollAbs(editor, editor->horz_si.nPos - cx);
}
void ME_ScrollRight(ME_TextEditor *editor, int cx)
{
ME_HScrollAbs(editor, editor->horz_si.nPos + cx);
}
/* Calculates the visiblity after a call to SetScrollRange or
* SetScrollInfo with SIF_RANGE. */
static BOOL ME_PostSetScrollRangeVisibility(SCROLLINFO *si)
{
if (si->fMask & SIF_DISABLENOSCROLL)
return TRUE;
/* This must match the check in SetScrollInfo to determine whether
* to show or hide the scrollbars. */
return si->nMin < si->nMax - max(si->nPage - 1, 0);
}
void ME_UpdateScrollBar(ME_TextEditor *editor)
{
/* Note that this is the only function that should ever call
* SetScrollInfo with SIF_PAGE or SIF_RANGE. */
SCROLLINFO si;
BOOL bScrollBarWasVisible, bScrollBarWillBeVisible;
if (ME_WrapMarkedParagraphs(editor))
FIXME("ME_UpdateScrollBar had to call ME_WrapMarkedParagraphs\n");
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
si.nMin = 0;
if (editor->styleFlags & ES_DISABLENOSCROLL)
si.fMask |= SIF_DISABLENOSCROLL;
/* Update horizontal scrollbar */
bScrollBarWasVisible = editor->horz_si.nMax > editor->horz_si.nPage;
bScrollBarWillBeVisible = editor->nTotalWidth > editor->sizeWindow.cx;
if (editor->horz_si.nPos && !bScrollBarWillBeVisible)
{
ME_HScrollAbs(editor, 0);
/* ME_HScrollAbs will call this function,
* so nothing else needs to be done here. */
return;
}
si.nMax = editor->nTotalWidth;
si.nPos = editor->horz_si.nPos;
si.nPage = editor->sizeWindow.cx;
if (si.nMax != editor->horz_si.nMax ||
si.nPage != editor->horz_si.nPage)
{
TRACE("min=%d max=%d page=%d\n", si.nMin, si.nMax, si.nPage);
editor->horz_si.nMax = si.nMax;
editor->horz_si.nPage = si.nPage;
if ((bScrollBarWillBeVisible || bScrollBarWasVisible) &&
editor->styleFlags & WS_HSCROLL)
{
if (si.nMax > 0xFFFF)
{
/* Native scales the scrollbar info to 16-bit external values. */
si.nPos = MulDiv(si.nPos, 0xFFFF, si.nMax);
si.nMax = 0xFFFF;
}
if (editor->hWnd) {
SetScrollInfo(editor->hWnd, SB_HORZ, &si, TRUE);
} else {
ITextHost_TxSetScrollRange(editor->texthost, SB_HORZ, si.nMin, si.nMax, FALSE);
ITextHost_TxSetScrollPos(editor->texthost, SB_HORZ, si.nPos, TRUE);
}
/* SetScrollInfo or SetScrollRange change scrollbar visibility. */
bScrollBarWasVisible = ME_PostSetScrollRangeVisibility(&si);
}
}
if (editor->styleFlags & WS_HSCROLL)
{
if (si.fMask & SIF_DISABLENOSCROLL) {
bScrollBarWillBeVisible = TRUE;
} else if (!(editor->styleFlags & WS_HSCROLL)) {
bScrollBarWillBeVisible = FALSE;
}
if (bScrollBarWasVisible != bScrollBarWillBeVisible)
ITextHost_TxShowScrollBar(editor->texthost, SB_HORZ, bScrollBarWillBeVisible);
}
/* Update vertical scrollbar */
bScrollBarWasVisible = editor->vert_si.nMax > editor->vert_si.nPage;
bScrollBarWillBeVisible = editor->nTotalLength > editor->sizeWindow.cy &&
(editor->styleFlags & ES_MULTILINE);
if (editor->vert_si.nPos && !bScrollBarWillBeVisible)
{
ME_VScrollAbs(editor, 0);
/* ME_VScrollAbs will call this function,
* so nothing else needs to be done here. */
return;
}
si.nMax = editor->nTotalLength;
si.nPos = editor->vert_si.nPos;
si.nPage = editor->sizeWindow.cy;
if (si.nMax != editor->vert_si.nMax ||
si.nPage != editor->vert_si.nPage)
{
TRACE("min=%d max=%d page=%d\n", si.nMin, si.nMax, si.nPage);
editor->vert_si.nMax = si.nMax;
editor->vert_si.nPage = si.nPage;
if ((bScrollBarWillBeVisible || bScrollBarWasVisible) &&
editor->styleFlags & WS_VSCROLL)
{
if (si.nMax > 0xFFFF)
{
/* Native scales the scrollbar info to 16-bit external values. */
si.nPos = MulDiv(si.nPos, 0xFFFF, si.nMax);
si.nMax = 0xFFFF;
}
if (editor->hWnd) {
SetScrollInfo(editor->hWnd, SB_VERT, &si, TRUE);
} else {
ITextHost_TxSetScrollRange(editor->texthost, SB_VERT, si.nMin, si.nMax, FALSE);
ITextHost_TxSetScrollPos(editor->texthost, SB_VERT, si.nPos, TRUE);
}
/* SetScrollInfo or SetScrollRange change scrollbar visibility. */
bScrollBarWasVisible = ME_PostSetScrollRangeVisibility(&si);
}
}
if (editor->styleFlags & WS_VSCROLL)
{
if (si.fMask & SIF_DISABLENOSCROLL) {
bScrollBarWillBeVisible = TRUE;
} else if (!(editor->styleFlags & WS_VSCROLL)) {
bScrollBarWillBeVisible = FALSE;
}
if (bScrollBarWasVisible != bScrollBarWillBeVisible)
ITextHost_TxShowScrollBar(editor->texthost, SB_VERT,
bScrollBarWillBeVisible);
}
}
void ME_EnsureVisible(ME_TextEditor *editor, ME_Cursor *pCursor)
{
ME_Run *pRun = &pCursor->pRun->member.run;
ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
ME_DisplayItem *pPara = pCursor->pPara;
int x, y, yheight;
assert(pRow);
assert(pPara);
if (editor->styleFlags & ES_AUTOHSCROLL)
{
x = pRun->pt.x + ME_PointFromChar(editor, pRun, pCursor->nOffset);
if (x > editor->horz_si.nPos + editor->sizeWindow.cx)
x = x + 1 - editor->sizeWindow.cx;
else if (x > editor->horz_si.nPos)
x = editor->horz_si.nPos;
if (~editor->styleFlags & ES_AUTOVSCROLL)
{
ME_HScrollAbs(editor, x);
return;
}
} else {
if (~editor->styleFlags & ES_AUTOVSCROLL)
return;
x = editor->horz_si.nPos;
}
y = pPara->member.para.pt.y + pRow->member.row.pt.y;
yheight = pRow->member.row.nHeight;
if (y < editor->vert_si.nPos)
ME_ScrollAbs(editor, x, y);
else if (y + yheight > editor->vert_si.nPos + editor->sizeWindow.cy)
ME_ScrollAbs(editor, x, y + yheight - editor->sizeWindow.cy);
else if (x != editor->horz_si.nPos)
ME_ScrollAbs(editor, x, editor->vert_si.nPos);
}
void
ME_InvalidateSelection(ME_TextEditor *editor)
{
ME_DisplayItem *para1, *para2;
int nStart, nEnd;
int len = ME_GetTextLength(editor);
ME_GetSelectionOfs(editor, &nStart, &nEnd);
/* if both old and new selection are 0-char (= caret only), then
there's no (inverted) area to be repainted, neither old nor new */
if (nStart == nEnd && editor->nLastSelStart == editor->nLastSelEnd)
return;
ME_WrapMarkedParagraphs(editor);
ME_GetSelectionParas(editor, &para1, &para2);
assert(para1->type == diParagraph);
assert(para2->type == diParagraph);
/* last selection markers aren't always updated, which means
* they can point past the end of the document */
if (editor->nLastSelStart > len || editor->nLastSelEnd > len) {
ME_MarkForPainting(editor,
ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph),
editor->pBuffer->pLast);
} else {
/* if the start part of selection is being expanded or contracted... */
if (nStart < editor->nLastSelStart) {
ME_MarkForPainting(editor, para1, editor->pLastSelStartPara->member.para.next_para);
} else if (nStart > editor->nLastSelStart) {
ME_MarkForPainting(editor, editor->pLastSelStartPara, para1->member.para.next_para);
}
/* if the end part of selection is being contracted or expanded... */
if (nEnd < editor->nLastSelEnd) {
ME_MarkForPainting(editor, para2, editor->pLastSelEndPara->member.para.next_para);
} else if (nEnd > editor->nLastSelEnd) {
ME_MarkForPainting(editor, editor->pLastSelEndPara, para2->member.para.next_para);
}
}
ME_InvalidateMarkedParagraphs(editor);
/* remember the last invalidated position */
ME_GetSelectionOfs(editor, &editor->nLastSelStart, &editor->nLastSelEnd);
ME_GetSelectionParas(editor, &editor->pLastSelStartPara, &editor->pLastSelEndPara);
assert(editor->pLastSelStartPara->type == diParagraph);
assert(editor->pLastSelEndPara->type == diParagraph);
}
BOOL
ME_SetZoom(ME_TextEditor *editor, int numerator, int denominator)
{
/* TODO: Zoom images and objects */
if (numerator == 0 && denominator == 0)
{
editor->nZoomNumerator = editor->nZoomDenominator = 0;
return TRUE;
}
if (numerator <= 0 || denominator <= 0)
return FALSE;
if (numerator * 64 <= denominator || numerator / denominator >= 64)
return FALSE;
editor->nZoomNumerator = numerator;
editor->nZoomDenominator = denominator;
ME_RewrapRepaint(editor);
return TRUE;
}
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