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reactos/dll/win32/riched20/paint.c
Katayama Hirofumi MZ 915569a8de
[RICHED20] Fail elegantly if pRow or pPara is NULL on ME_EnsureVisible (#4126) 
CORE-16578
2021-11-28 22:23:04 +09:00

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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, 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);
ME_InitContext(&c, editor, hDC);
SetBkMode(hDC, TRANSPARENT);
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;
}
/* Draw the paragraph if any of the paragraph is in the update region. */
if (ys < rcUpdate->bottom && ye > rcUpdate->top)
ME_DrawParagraph(&c, item);
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;
IntersectRect(&rc, &rc, rcUpdate);
if (!IsRectEmpty(&rc))
PatBlt(hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
}
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");
}
ITextHost_TxViewChange(editor->texthost, TRUE);
}
void ME_UpdateRepaint(ME_TextEditor *editor, BOOL update_now)
{
/* 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]);
ITextHost_TxViewChange(editor->texthost, update_now);
ME_SendSelChange(editor);
/* 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;
}
}
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(const 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(const 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 int calc_y_offset( const ME_Context *c, ME_Style *style )
{
int offs = 0, twips = 0;
if ((style->fmt.dwMask & style->fmt.dwEffects) & CFM_OFFSET)
twips = style->fmt.yOffset;
if ((style->fmt.dwMask & style->fmt.dwEffects) & (CFM_SUPERSCRIPT | CFM_SUBSCRIPT))
{
if (style->fmt.dwEffects & CFE_SUPERSCRIPT) twips = style->fmt.yHeight/3;
if (style->fmt.dwEffects & CFE_SUBSCRIPT) twips = -style->fmt.yHeight/12;
}
if (twips) offs = ME_twips2pointsY( c, twips );
return offs;
}
static COLORREF get_text_color( ME_Context *c, ME_Style *style, BOOL highlight )
{
COLORREF color;
if (highlight)
color = ITextHost_TxGetSysColor( c->editor->texthost, COLOR_HIGHLIGHTTEXT );
else if ((style->fmt.dwMask & CFM_LINK) && (style->fmt.dwEffects & CFE_LINK))
color = RGB(0,0,255);
else if ((style->fmt.dwMask & CFM_COLOR) && (style->fmt.dwEffects & CFE_AUTOCOLOR))
color = ITextHost_TxGetSysColor( c->editor->texthost, COLOR_WINDOWTEXT );
else
color = style->fmt.crTextColor;
return color;
}
static COLORREF get_back_color( ME_Context *c, ME_Style *style, BOOL highlight )
{
COLORREF color;
if (highlight)
color = ITextHost_TxGetSysColor( c->editor->texthost, COLOR_HIGHLIGHT );
else if ( (style->fmt.dwMask & CFM_BACKCOLOR)
&& !(style->fmt.dwEffects & CFE_AUTOBACKCOLOR) )
color = style->fmt.crBackColor;
else
color = ITextHost_TxGetSysColor( c->editor->texthost, COLOR_WINDOW );
return color;
}
static HPEN get_underline_pen( ME_Style *style, COLORREF color )
{
if (style->fmt.dwEffects & CFE_LINK)
return CreatePen( PS_SOLID, 1, color );
/* Choose the pen type for underlining the text. */
if (style->fmt.dwEffects & CFE_UNDERLINE)
{
switch (style->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) */
return CreatePen( PS_SOLID, 1, color );
case CFU_UNDERLINEDOTTED:
return CreatePen( PS_DOT, 1, color );
default:
FIXME( "Unknown underline type (%u)\n", style->fmt.bUnderlineType );
/* fall through */
case CFU_CF1UNDERLINE: /* this type is supported in the font, do nothing */
case CFU_UNDERLINENONE:
break;
}
}
return NULL;
}
static void draw_underline( ME_Context *c, ME_Run *run, int x, int y, COLORREF color )
{
HPEN pen;
pen = get_underline_pen( run->style, color );
if (pen)
{
HPEN old_pen = SelectObject( c->hDC, pen );
MoveToEx( c->hDC, x, y + 1, NULL );
LineTo( c->hDC, x + run->nWidth, y + 1 );
SelectObject( c->hDC, old_pen );
DeleteObject( pen );
}
return;
}
/*********************************************************************
* draw_space
*
* Draw the end-of-paragraph or tab space.
*
* If actually_draw is TRUE then ensure any underline is drawn.
*/
static void draw_space( ME_Context *c, ME_Run *run, int x, int y,
BOOL selected, BOOL actually_draw, int ymin, int cy )
{
HDC hdc = c->hDC;
BOOL old_style_selected = FALSE;
RECT rect;
COLORREF back_color = 0;
SetRect( &rect, x, ymin, x + run->nWidth, ymin + cy );
if (c->editor->bHideSelection || (!c->editor->bHaveFocus &&
!(c->editor->styleFlags & ES_NOHIDESEL))) selected = FALSE;
if (c->editor->bEmulateVersion10)
{
old_style_selected = selected;
selected = FALSE;
}
if (selected)
back_color = ITextHost_TxGetSysColor( c->editor->texthost, COLOR_HIGHLIGHT );
if (actually_draw)
{
COLORREF text_color = get_text_color( c, run->style, selected );
COLORREF old_text, old_back;
int y_offset = calc_y_offset( c, run->style );
static const WCHAR space[1] = {' '};
select_style( c, run->style );
old_text = SetTextColor( hdc, text_color );
if (selected) old_back = SetBkColor( hdc, back_color );
ExtTextOutW( hdc, x, y - y_offset, selected ? ETO_OPAQUE : 0, &rect, space, 1, &run->nWidth );
if (selected) SetBkColor( hdc, old_back );
SetTextColor( hdc, old_text );
draw_underline( c, run, x, y - y_offset, text_color );
}
else if (selected)
{
HBRUSH brush = CreateSolidBrush( back_color );
FillRect( hdc, &rect, brush );
DeleteObject( brush );
}
if (old_style_selected)
PatBlt( hdc, x, ymin, run->nWidth, cy, DSTINVERT );
}
static void get_selection_rect( ME_Context *c, ME_Run *run, int from, int to, int cy, RECT *r )
{
from = max( 0, from );
to = min( run->len, to );
r->left = ME_PointFromCharContext( c, run, from, TRUE );
r->top = 0;
r->right = ME_PointFromCharContext( c, run, to, TRUE );
r->bottom = cy;
return;
}
static void draw_text( ME_Context *c, ME_Run *run, int x, int y, BOOL selected, RECT *sel_rect )
{
COLORREF text_color = get_text_color( c, run->style, selected );
COLORREF back_color = get_back_color( c, run->style, selected );
COLORREF old_text, old_back = 0;
const WCHAR *text = get_text( run, 0 );
ME_String *masked = NULL;
const BOOL paint_bg = ( selected
|| ( ( run->style->fmt.dwMask & CFM_BACKCOLOR )
&& !(CFE_AUTOBACKCOLOR & run->style->fmt.dwEffects) )
);
if (c->editor->cPasswordMask)
{
masked = ME_MakeStringR( c->editor->cPasswordMask, run->len );
text = masked->szData;
}
old_text = SetTextColor( c->hDC, text_color );
if (paint_bg) old_back = SetBkColor( c->hDC, back_color );
if (run->para->nFlags & MEPF_COMPLEX)
ScriptTextOut( c->hDC, &run->style->script_cache, x, y, paint_bg ? ETO_OPAQUE : 0, sel_rect,
&run->script_analysis, NULL, 0, run->glyphs, run->num_glyphs, run->advances,
NULL, run->offsets );
else
ExtTextOutW( c->hDC, x, y, paint_bg ? ETO_OPAQUE : 0, sel_rect, text, run->len, NULL );
if (paint_bg) SetBkColor( c->hDC, old_back );
SetTextColor( c->hDC, old_text );
draw_underline( c, run, x, y, text_color );
ME_DestroyString( masked );
return;
}
static void ME_DrawTextWithStyle(ME_Context *c, ME_Run *run, int x, int y,
int nSelFrom, int nSelTo, int ymin, int cy)
{
HDC hDC = c->hDC;
int yOffset = 0;
BOOL selected = (nSelFrom < run->len && nSelTo >= 0
&& nSelFrom < nSelTo && !c->editor->bHideSelection &&
(c->editor->bHaveFocus || (c->editor->styleFlags & ES_NOHIDESEL)));
BOOL old_style_selected = FALSE;
RECT sel_rect;
HRGN clip = NULL, sel_rgn = NULL;
yOffset = calc_y_offset( c, run->style );
if (selected)
{
get_selection_rect( c, run, nSelFrom, nSelTo, cy, &sel_rect );
OffsetRect( &sel_rect, x, ymin );
if (c->editor->bEmulateVersion10)
{
old_style_selected = TRUE;
selected = FALSE;
}
else
{
sel_rgn = CreateRectRgnIndirect( &sel_rect );
clip = CreateRectRgn( 0, 0, 0, 0 );
if (GetClipRgn( hDC, clip ) != 1)
{
DeleteObject( clip );
clip = NULL;
}
}
}
select_style( c, run->style );
if (sel_rgn) ExtSelectClipRgn( hDC, sel_rgn, RGN_DIFF );
if (!(run->style->fmt.dwEffects & CFE_AUTOBACKCOLOR)
&& (run->style->fmt.dwMask & CFM_BACKCOLOR) )
{
RECT tmp_rect;
get_selection_rect( c, run, 0, run->len, cy, &tmp_rect );
OffsetRect( &tmp_rect, x, ymin );
draw_text( c, run, x, y - yOffset, FALSE, &tmp_rect );
}
else
draw_text( c, run, x, y - yOffset, FALSE, NULL );
if (sel_rgn)
{
ExtSelectClipRgn( hDC, clip, RGN_COPY );
ExtSelectClipRgn( hDC, sel_rgn, RGN_AND );
draw_text( c, run, x, y - yOffset, TRUE, &sel_rect );
ExtSelectClipRgn( hDC, clip, RGN_COPY );
if (clip) DeleteObject( clip );
DeleteObject( sel_rgn );
}
if (old_style_selected)
PatBlt( hDC, sel_rect.left, ymin, sel_rect.right - sel_rect.left, cy, DSTINVERT );
}
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;
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)
{
draw_space( c, run, x, y, TRUE, FALSE,
c->pt.y + para->pt.y + start->member.row.pt.y,
start->member.row.nHeight );
}
return;
}
if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
{
BOOL selected = runofs >= nSelFrom && runofs < nSelTo;
draw_space( c, run, x, y, selected, TRUE,
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, (runofs >= nSelFrom) && (runofs < nSelTo));
else
{
ME_DrawTextWithStyle(c, run, x, y, nSelFrom - runofs, nSelTo - runofs,
c->pt.y + para->pt.y + start->member.row.pt.y,
start->member.row.nHeight);
}
}
/* The documented widths are in points (72 dpi), but converting them to
* 96 dpi (standard display resolution) avoids dealing with fractions. */
static const struct {unsigned width : 8, pen_style : 4, dble : 1;} border_details[] = {
/* none */ {0, PS_SOLID, FALSE},
/* 3/4 */ {1, PS_SOLID, FALSE},
/* 1 1/2 */ {2, PS_SOLID, FALSE},
/* 2 1/4 */ {3, PS_SOLID, FALSE},
/* 3 */ {4, PS_SOLID, FALSE},
/* 4 1/2 */ {6, PS_SOLID, FALSE},
/* 6 */ {8, PS_SOLID, FALSE},
/* 3/4 double */ {1, PS_SOLID, TRUE},
/* 1 1/2 double */ {2, PS_SOLID, TRUE},
/* 2 1/4 double */ {3, PS_SOLID, TRUE},
/* 3/4 gray */ {1, PS_DOT /* FIXME */, FALSE},
/* 1 1/2 dashed */ {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(const ME_Context* c, int idx)
{
int width = border_details[idx].width;
if (c->dpi.cx != 96)
width = MulDiv(width, c->dpi.cx, 96);
if (c->editor->nZoomNumerator != 0)
width = MulDiv(width, c->editor->nZoomNumerator, c->editor->nZoomDenominator);
return width;
}
int ME_GetParaBorderWidth(const ME_Context* c, int flags)
{
int idx = (flags >> 8) & 0xF;
int width;
if (idx >= ARRAY_SIZE(border_details))
{
FIXME("Unsupported border value %d\n", idx);
return 0;
}
width = ME_GetBorderPenWidth(c, idx);
if (border_details[idx].dble) width = width * 2 + 1;
return width;
}
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->fmt.dwMask & (PFM_BORDER | PFM_SPACEBEFORE | PFM_SPACEAFTER))) return;
border_width = top_border = bottom_border = 0;
idx = (para->fmt.wBorders >> 8) & 0xF;
hasParaBorder = (!(c->editor->bEmulateVersion10 &&
para->fmt.dwMask & PFM_TABLE &&
para->fmt.wEffects & PFE_TABLE) &&
(para->fmt.dwMask & PFM_BORDER) &&
idx != 0 &&
(para->fmt.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->fmt.wBorders & 0x00B0)
FIXME("Unsupported border flags %x\n", para->fmt.wBorders);
border_width = ME_GetParaBorderWidth(c, para->fmt.wBorders);
if (para->fmt.wBorders & 4) top_border = border_width;
if (para->fmt.wBorders & 8) bottom_border = border_width;
}
if (para->fmt.dwMask & PFM_SPACEBEFORE)
{
rc.left = c->rcView.left;
rc.right = c->rcView.right;
rc.top = y;
bounds->top = ME_twips2pointsY(c, para->fmt.dySpaceBefore);
rc.bottom = y + bounds->top + top_border;
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
}
if (para->fmt.dwMask & PFM_SPACEAFTER)
{
rc.left = c->rcView.left;
rc.right = c->rcView.right;
rc.bottom = y + para->nHeight;
bounds->bottom = ME_twips2pointsY(c, para->fmt.dySpaceAfter);
rc.top = rc.bottom - bounds->bottom - bottom_border;
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
}
/* 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->fmt.wBorders & 64) /* autocolor */
pencr = ITextHost_TxGetSysColor(c->editor->texthost,
COLOR_WINDOWTEXT);
else
pencr = pen_colors[(para->fmt.wBorders >> 12) & 0xF];
rightEdge = c->pt.x + max(c->editor->sizeWindow.cx,
c->editor->nTotalWidth);
pen_width = ME_GetBorderPenWidth(c, 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->fmt.wBorders & (x)) ? (pen_width + 1) : 0)
if (para->fmt.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;
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
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->fmt.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;
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
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->fmt.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->fmt.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)
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
}
/* 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->fmt.dwMask & PFM_TABLE && para->fmt.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->fmt.dxOffset);
/* The left edge, stored in dxStartIndent affected just the first edge */
startX = firstX - ME_twips2pointsX(c, para->fmt.dxStartIndent);
rowY = c->pt.y + para->pt.y;
if (para->fmt.dwMask & PFM_SPACEBEFORE)
rowY += ME_twips2pointsY(c, para->fmt.dySpaceBefore);
nHeight = ME_FindItemFwd(paragraph, diStartRow)->member.row.nHeight;
rowBottom = rowY + nHeight;
/* Draw horizontal lines */
MoveToEx(c->hDC, firstX, rowY, &oldPt);
i = para->fmt.cTabCount - 1;
endX = startX + ME_twips2pointsX(c, para->fmt.rgxTabs[i] & 0x00ffffff) + 1;
LineTo(c->hDC, endX, rowY);
pNextFmt = &para->next_para->member.para.fmt;
/* 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->fmt.cTabCount; i++)
{
int rightBoundary = para->fmt.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 draw_para_number( ME_Context *c, ME_DisplayItem *p )
{
ME_Paragraph *para = &p->member.para;
int x, y;
COLORREF old_text;
if (para->fmt.wNumbering)
{
select_style( c, para->para_num.style );
old_text = SetTextColor( c->hDC, get_text_color( c, para->para_num.style, FALSE ) );
x = c->pt.x + para->para_num.pt.x;
y = c->pt.y + para->pt.y + para->para_num.pt.y;
ExtTextOutW( c->hDC, x, y, 0, NULL, para->para_num.text->szData, para->para_num.text->nLen, NULL );
SetTextColor( c->hDC, old_text );
}
}
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)
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
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 after_bdr = rc;
after_bdr.left = rc.right + bounds.right;
after_bdr.right = c->rcView.right;
if (RectVisible(c->hDC, &after_bdr))
PatBlt(c->hDC, after_bdr.left, after_bdr.top, after_bdr.right - after_bdr.left,
after_bdr.bottom - after_bdr.top, PATCOPY);
}
if (me_debug)
{
static 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.top + height;
TRACE("rc = %s\n", wine_dbgstr_rect(&rc));
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)
{
static 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, get_text( &p->member.run, 0 ));
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))
PatBlt(c->hDC, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, PATCOPY);
break;
default:
break;
}
no++;
}
ME_DrawTableBorders(c, paragraph);
draw_para_number(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 visibility 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;
#ifdef __REACTOS__
if (!pRow || !pPara)
return;
#else
assert(pRow);
assert(pPara);
#endif
if (editor->styleFlags & ES_AUTOHSCROLL)
{
x = pRun->pt.x + ME_PointFromChar(editor, pRun, pCursor->nOffset, TRUE);
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 *sel_start, *sel_end;
ME_DisplayItem *repaint_start = NULL, *repaint_end = NULL;
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, &sel_start, &sel_end);
assert(sel_start->type == diParagraph);
assert(sel_end->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) {
repaint_start = ME_FindItemFwd(editor->pBuffer->pFirst, diParagraph);
repaint_end = editor->pBuffer->pLast->member.para.prev_para;
} else {
/* if the start part of selection is being expanded or contracted... */
if (nStart < editor->nLastSelStart) {
repaint_start = sel_start;
repaint_end = editor->pLastSelStartPara;
} else if (nStart > editor->nLastSelStart) {
repaint_start = editor->pLastSelStartPara;
repaint_end = sel_start;
}
/* if the end part of selection is being contracted or expanded... */
if (nEnd < editor->nLastSelEnd) {
if (!repaint_start) repaint_start = sel_end;
repaint_end = editor->pLastSelEndPara;
} else if (nEnd > editor->nLastSelEnd) {
if (!repaint_start) repaint_start = editor->pLastSelEndPara;
repaint_end = sel_end;
}
}
if (repaint_start)
ME_InvalidateParagraphRange(editor, repaint_start, repaint_end);
/* 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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