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Sweden-Number/dlls/riched20/paint.c

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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);
void ME_PaintContent(ME_TextEditor *editor, HDC hDC, BOOL bOnlyNew, const RECT *rcUpdate) {
ME_DisplayItem *item;
ME_Context c;
int yoffset;
editor->nSequence++;
yoffset = ME_GetYScrollPos(editor);
ME_InitContext(&c, editor, hDC);
SetBkMode(hDC, TRANSPARENT);
ME_MoveCaret(editor);
item = editor->pBuffer->pFirst->next;
c.pt.y -= yoffset;
while(item != editor->pBuffer->pLast) {
int ye;
assert(item->type == diParagraph);
ye = c.pt.y + item->member.para.nHeight;
if (!bOnlyNew || (item->member.para.nFlags & MEPF_REPAINT))
{
BOOL bPaint = (rcUpdate == NULL);
if (rcUpdate)
bPaint = c.pt.y<rcUpdate->bottom && ye>rcUpdate->top;
if (bPaint)
{
ME_DrawParagraph(&c, item);
if (!rcUpdate || (rcUpdate->top<=c.pt.y && rcUpdate->bottom>=ye))
item->member.para.nFlags &= ~MEPF_REPAINT;
}
}
c.pt.y = ye;
item = item->member.para.next_para;
}
if (c.pt.y<c.rcView.bottom) {
RECT rc;
int xs = c.rcView.left, xe = c.rcView.right;
int ys = c.pt.y, ye = c.rcView.bottom;
if (bOnlyNew)
{
int y1 = editor->nTotalLength-yoffset, y2 = editor->nLastTotalLength-yoffset;
if (y1<y2)
ys = y1, ye = y2+1;
else
ys = ye;
}
if (rcUpdate && ys!=ye)
{
xs = rcUpdate->left, xe = rcUpdate->right;
if (rcUpdate->top > ys)
ys = rcUpdate->top;
if (rcUpdate->bottom < ye)
ye = rcUpdate->bottom;
}
if (ye>ys) {
rc.left = xs;
rc.top = ys;
rc.right = xe;
rc.bottom = ye;
FillRect(hDC, &rc, c.editor->hbrBackground);
}
}
if (editor->nTotalLength != editor->nLastTotalLength)
ME_SendRequestResize(editor, FALSE);
editor->nLastTotalLength = editor->nTotalLength;
ME_DestroyContext(&c, NULL);
}
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);
UpdateWindow(editor->hWnd);
}
void ME_UpdateRepaint(ME_TextEditor *editor)
{
/* Should be called whenever the contents of the control have changed */
ME_Cursor *pCursor;
BOOL wrappedParagraphs;
wrappedParagraphs = ME_WrapMarkedParagraphs(editor);
if (!editor->bRedraw) return;
if (wrappedParagraphs)
ME_UpdateScrollBar(editor);
/* Ensure that the cursor is visible */
pCursor = &editor->pCursors[0];
ME_EnsureVisible(editor, pCursor->pRun);
/* 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);
if (editor->bRedraw)
{
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_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;
hOldFont = ME_SelectStyleFont(c, s);
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 = GetSysColor(COLOR_WINDOWTEXT);
else
rgb = s->fmt.crTextColor;
rgbOld = SetTextColor(hDC, rgb);
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);
ExtTextOutW(hDC, x, y-yOffset, 0, NULL, szText, nChars, NULL);
GetTextExtentPoint32W(hDC, szText, nChars, &sz);
if (width) *width = sz.cx;
if (s->fmt.dwMask & CFM_UNDERLINETYPE)
{
HPEN hPen;
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 != NULL)
{
HPEN hOldPen = SelectObject(hDC, hPen);
/* FIXME: should use textmetrics info for Descent info */
MoveToEx(hDC, x, y - yOffset + 1, NULL);
LineTo(hDC, x + sz.cx, y - yOffset + 1);
SelectObject(hDC, hOldPen);
DeleteObject(hPen);
}
}
if (nSelFrom < nChars && nSelTo >= 0 && nSelFrom<nSelTo)
{
if (nSelFrom < 0) nSelFrom = 0;
if (nSelTo > nChars) nSelTo = nChars;
GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
x += sz.cx;
GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
/* Invert selection if not hidden by EM_HIDESELECTION */
if (c->editor->bHideSelection == FALSE)
PatBlt(hDC, x, ymin, sz.cx, cy, DSTINVERT);
}
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_GetSelection(c->editor, &nSelFrom, &nSelTo);
/* Draw selected end-of-paragraph mark */
if (run->nFlags & MERF_ENDPARA && runofs >= nSelFrom && runofs < nSelTo)
ME_DrawTextWithStyle(c, x, y, wszSpace, 1, run->style, NULL, 0, 1,
c->pt.y + start->member.row.nYPos,
start->member.row.nHeight);
/* you can always comment it out if you need visible paragraph marks */
if (run->nFlags & (MERF_ENDPARA | MERF_TAB | MERF_CELL))
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,ME_StrVLen(run->strText));
ME_DrawTextWithStyle(c, x, y,
szMasked->szData, ME_StrVLen(szMasked), run->style, NULL,
nSelFrom-runofs,nSelTo-runofs, c->pt.y+start->member.row.nYPos, start->member.row.nHeight);
ME_DestroyString(szMasked);
}
else
ME_DrawTextWithStyle(c, x, y,
run->strText->szData, ME_StrVLen(run->strText), run->style, NULL,
nSelFrom-runofs,nSelTo-runofs, c->pt.y+start->member.row.nYPos, 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;
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;
if ((para->pFmt->dwMask & PFM_BORDER) && idx != 0 && (para->pFmt->wBorders & 0xF))
{
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);
}
if ((para->pFmt->dwMask & PFM_BORDER) && idx != 0 && (para->pFmt->wBorders & 0xF)) {
int pen_width;
COLORREF pencr;
HPEN pen = NULL, oldpen = NULL;
POINT pt;
if (para->pFmt->wBorders & 64) /* autocolor */
pencr = GetSysColor(COLOR_WINDOWTEXT);
else
pencr = pen_colors[(para->pFmt->wBorders >> 12) & 0xF];
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->rcView.left, y + bounds->top, NULL);
LineTo(c->hDC, c->rcView.left, y + para->nHeight - bounds->bottom);
if (border_details[idx].dble) {
rc.left = c->rcView.left + 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->rcView.left + pen_width + 1, y + bounds->top + DD(4), NULL);
LineTo(c->hDC, c->rcView.left + pen_width + 1, y + para->nHeight - bounds->bottom - DD(8));
}
bounds->left += border_width;
}
if (para->pFmt->wBorders & 2)
{
MoveToEx(c->hDC, c->rcView.right - 1, y + bounds->top, NULL);
LineTo(c->hDC, c->rcView.right - 1, y + para->nHeight - bounds->bottom);
if (border_details[idx].dble) {
rc.left = c->rcView.right - pen_width - 1;
rc.right = c->rcView.right - 1;
rc.top = y + bounds->top;
rc.bottom = y + para->nHeight - bounds->bottom;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
MoveToEx(c->hDC, c->rcView.right - 1 - pen_width - 1, y + bounds->top + DD(4), NULL);
LineTo(c->hDC, c->rcView.right - 1 - pen_width - 1, y + para->nHeight - bounds->bottom - DD(8));
}
bounds->right += border_width;
}
if (para->pFmt->wBorders & 4)
{
MoveToEx(c->hDC, c->rcView.left, y + bounds->top, NULL);
LineTo(c->hDC, c->rcView.right, y + bounds->top);
if (border_details[idx].dble) {
MoveToEx(c->hDC, c->rcView.left + DD(1), y + bounds->top + pen_width + 1, NULL);
LineTo(c->hDC, c->rcView.right - DD(2), y + bounds->top + pen_width + 1);
}
bounds->top += border_width;
}
if (para->pFmt->wBorders & 8)
{
MoveToEx(c->hDC, c->rcView.left, y + para->nHeight - bounds->bottom - 1, NULL);
LineTo(c->hDC, c->rcView.right, y + para->nHeight - bounds->bottom - 1);
if (border_details[idx].dble) {
MoveToEx(c->hDC, c->rcView.left + DD(1), y + para->nHeight - bounds->bottom - 1 - pen_width - 1, NULL);
LineTo(c->hDC, c->rcView.right - 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);
}
}
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, rcPara, bounds;
int y = c->pt.y;
int height = 0, baseline = 0, no=0, pno = 0;
int xs = 0, xe = 0;
BOOL visible = FALSE;
c->pt.x = c->rcView.left;
rcPara.left = c->rcView.left;
rcPara.right = c->rcView.right;
for (p = paragraph; p!=paragraph->member.para.next_para; p = p->next) {
switch(p->type) {
case diParagraph:
para = &p->member.para;
assert(para);
pno = 0;
xs = c->rcView.left + ME_twips2pointsX(c, para->pFmt->dxStartIndent);
xe = c->rcView.right - ME_twips2pointsX(c, para->pFmt->dxRightIndent);
ME_DrawParaDecoration(c, para, y, &bounds);
y += bounds.top;
break;
case diStartRow:
y += height;
rcPara.top = y;
rcPara.bottom = y+p->member.row.nHeight;
visible = RectVisible(c->hDC, &rcPara);
if (visible) {
/* left margin */
rc.left = c->rcView.left + bounds.left;
rc.right = xs;
rc.top = y;
rc.bottom = y+p->member.row.nHeight;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
/* right margin */
rc.left = xe;
rc.right = c->rcView.right - bounds.right;
FillRect(c->hDC, &rc, c->editor->hbrBackground);
rc.left = xs;
rc.right = xe;
FillRect(c->hDC, &rc, 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;
if (!pno++)
xe += ME_twips2pointsX(c, para->pFmt->dxOffset);
break;
case diRun:
assert(para);
run = &p->member.run;
if (visible && me_debug) {
rc.left = c->rcView.left+run->pt.x;
rc.right = c->rcView.left+run->pt.x+run->nWidth;
rc.top = c->pt.y+run->pt.y;
rc.bottom = c->pt.y+run->pt.y+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, run->pt.x, c->pt.y+run->pt.y+baseline, p, &paragraph->member.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 = run->pt.x;
pt.y = c->pt.y + run->pt.y;
wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
ME_DebugWrite(c->hDC, &pt, buf);
}
/* c->pt.x += p->member.run.nWidth; */
break;
default:
break;
}
no++;
}
SetTextAlign(c->hDC, align);
}
void ME_ScrollAbs(ME_TextEditor *editor, int absY)
{
ME_Scroll(editor, absY, 1);
}
void ME_ScrollUp(ME_TextEditor *editor, int cy)
{
ME_Scroll(editor, cy, 2);
}
void ME_ScrollDown(ME_TextEditor *editor, int cy)
{
ME_Scroll(editor, cy, 3);
}
void ME_Scroll(ME_TextEditor *editor, int value, int type)
{
SCROLLINFO si;
int nOrigPos, nNewPos, nActualScroll;
nOrigPos = ME_GetYScrollPos(editor);
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_POS;
switch (type)
{
case 1:
/*Scroll absolutely*/
si.nPos = value;
break;
case 2:
/* Scroll up - towards the beginning of the document */
si.nPos = nOrigPos - value;
break;
case 3:
/* Scroll down - towards the end of the document */
si.nPos = nOrigPos + value;
break;
default:
FIXME("ME_Scroll called incorrectly\n");
si.nPos = 0;
}
nNewPos = SetScrollInfo(editor->hWnd, SB_VERT, &si, editor->bRedraw);
nActualScroll = nOrigPos - nNewPos;
if (editor->bRedraw)
{
if (abs(nActualScroll) > editor->sizeWindow.cy)
InvalidateRect(editor->hWnd, NULL, TRUE);
else
ScrollWindowEx(editor->hWnd, 0, nActualScroll, NULL, NULL, NULL, NULL, SW_INVALIDATE);
ME_Repaint(editor);
}
ME_UpdateScrollBar(editor);
}
void ME_UpdateScrollBar(ME_TextEditor *editor)
{
/* Note that this is the only function that should ever call SetScrolLInfo
* with SIF_PAGE or SIF_RANGE. SetScrollPos and SetScrollRange should never
* be used at all. */
HWND hWnd;
SCROLLINFO si;
BOOL bScrollBarWasVisible,bScrollBarWillBeVisible;
if (ME_WrapMarkedParagraphs(editor))
FIXME("ME_UpdateScrollBar had to call ME_WrapMarkedParagraphs\n");
hWnd = editor->hWnd;
si.cbSize = sizeof(si);
bScrollBarWasVisible = ME_GetYScrollVisible(editor);
bScrollBarWillBeVisible = editor->nHeight > editor->sizeWindow.cy;
if (bScrollBarWasVisible != bScrollBarWillBeVisible)
{
ShowScrollBar(hWnd, SB_VERT, bScrollBarWillBeVisible);
ME_MarkAllForWrapping(editor);
ME_WrapMarkedParagraphs(editor);
}
si.fMask = SIF_PAGE | SIF_RANGE;
if (GetWindowLongW(hWnd, GWL_STYLE) & ES_DISABLENOSCROLL)
si.fMask |= SIF_DISABLENOSCROLL;
si.nMin = 0;
si.nMax = editor->nTotalLength;
si.nPage = editor->sizeWindow.cy;
TRACE("min=%d max=%d page=%d\n", si.nMin, si.nMax, si.nPage);
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
}
int ME_GetYScrollPos(ME_TextEditor *editor)
{
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_POS;
return GetScrollInfo(editor->hWnd, SB_VERT, &si) ? si.nPos : 0;
}
BOOL ME_GetYScrollVisible(ME_TextEditor *editor)
{ /* Returns true if the scrollbar is visible */
SCROLLBARINFO sbi;
sbi.cbSize = sizeof(sbi);
GetScrollBarInfo(editor->hWnd, OBJID_VSCROLL, &sbi);
return ((sbi.rgstate[0] & STATE_SYSTEM_INVISIBLE) == 0);
}
void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)
{
ME_DisplayItem *pRow = ME_FindItemBack(pRun, diStartRow);
ME_DisplayItem *pPara = ME_FindItemBack(pRun, diParagraph);
int y, yrel, yheight, yold;
assert(pRow);
assert(pPara);
y = pPara->member.para.nYPos+pRow->member.row.nYPos;
yheight = pRow->member.row.nHeight;
yold = ME_GetYScrollPos(editor);
yrel = y - yold;
if (y < yold)
ME_ScrollAbs(editor,y);
else if (yrel + yheight > editor->sizeWindow.cy)
ME_ScrollAbs(editor,y+yheight-editor->sizeWindow.cy);
}
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);
}
void
ME_InvalidateSelection(ME_TextEditor *editor)
{
ME_DisplayItem *para1, *para2;
int nStart, nEnd;
int len = ME_GetTextLength(editor);
ME_GetSelection(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),
ME_FindItemFwd(editor->pBuffer->pFirst, diTextEnd));
} else {
/* if the start part of selection is being expanded or contracted... */
if (nStart < editor->nLastSelStart) {
ME_MarkForPainting(editor, para1, ME_FindItemFwd(editor->pLastSelStartPara, diParagraphOrEnd));
} else
if (nStart > editor->nLastSelStart) {
ME_MarkForPainting(editor, editor->pLastSelStartPara, ME_FindItemFwd(para1, diParagraphOrEnd));
}
/* if the end part of selection is being contracted or expanded... */
if (nEnd < editor->nLastSelEnd) {
ME_MarkForPainting(editor, para2, ME_FindItemFwd(editor->pLastSelEndPara, diParagraphOrEnd));
} else
if (nEnd > editor->nLastSelEnd) {
ME_MarkForPainting(editor, editor->pLastSelEndPara, ME_FindItemFwd(para2, diParagraphOrEnd));
}
}
ME_InvalidateMarkedParagraphs(editor);
/* remember the last invalidated position */
ME_GetSelection(editor, &editor->nLastSelStart, &editor->nLastSelEnd);
ME_GetSelectionParas(editor, &editor->pLastSelStartPara, &editor->pLastSelEndPara);
assert(editor->pLastSelStartPara->type == diParagraph);
assert(editor->pLastSelEndPara->type == diParagraph);
}
void
ME_QueueInvalidateFromCursor(ME_TextEditor *editor, int nCursor)
{
editor->nInvalidOfs = ME_GetCursorOfs(editor, nCursor);
}
BOOL
ME_SetZoom(ME_TextEditor *editor, int numerator, int denominator)
{
/* TODO: Zoom images and objects */
if (numerator != 0)
{
if (denominator == 0)
return FALSE;
if (1.0 / 64.0 > (float)numerator / (float)denominator
|| (float)numerator / (float)denominator > 64.0)
return FALSE;
}
editor->nZoomNumerator = numerator;
editor->nZoomDenominator = denominator;
ME_RewrapRepaint(editor);
return TRUE;
}
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