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gecko-dev/layout/generic/nsTextFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsCOMPtr.h"
#include "nsHTMLParts.h"
#include "nsCRT.h"
#include "nsSplittableFrame.h"
#include "nsLineLayout.h"
#include "nsString.h"
#include "nsIPresContext.h"
#include "nsStyleConsts.h"
#include "nsIStyleContext.h"
#include "nsCoord.h"
#include "nsIFontMetrics.h"
#include "nsIRenderingContext.h"
#include "nsHTMLIIDs.h"
#include "nsIPresShell.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsITimerCallback.h"
#include "nsITimer.h"
#include "prtime.h"
#include "nsVoidArray.h"
#include "prprf.h"
#include "nsIDOMText.h"
#include "nsIDocument.h"
#include "nsIDeviceContext.h"
#include "nsIFocusTracker.h"
#include "nsXIFConverter.h"
#include "nsHTMLAtoms.h"
#include "nsILineBreaker.h"
#include "nsITextContent.h"
#include "nsTextReflow.h"/* XXX rename to nsTextRun */
#include "nsTextFragment.h"
#include "nsTextTransformer.h"
#include "nsLayoutAtoms.h"
static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);
#ifdef NS_DEBUG
#undef NOISY
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#else
#undef NOISY
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#endif
#define WORD_BUF_SIZE 100
#define TEXT_BUF_SIZE 1000
static NS_DEFINE_IID(kITextContentIID, NS_ITEXT_CONTENT_IID);
class TextFrame;
class BlinkTimer : public nsITimerCallback {
public:
BlinkTimer();
virtual ~BlinkTimer();
NS_DECL_ISUPPORTS
void AddFrame(TextFrame* aFrame);
PRBool RemoveFrame(TextFrame* aFrame);
PRInt32 FrameCount();
void Start();
void Stop();
virtual void Notify(nsITimer *timer);
nsITimer* mTimer;
nsVoidArray mFrames;
};
class TextFrame : public nsSplittableFrame {
public:
TextFrame();
// nsIFrame
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD GetCursor(nsIPresContext& aPresContext,
nsPoint& aPoint,
PRInt32& aCursor);
NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent);
NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::textFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
NS_IMETHOD GetFrameName(nsString& aResult) const;
NS_IMETHOD GetPosition(nsIPresContext& aCX,
nsIRenderingContext * aRendContext,
nsGUIEvent* aEvent,
nsIFrame * aNewFrame,
PRUint32& aAcutalContentOffset,
PRInt32& aOffset);
NS_IMETHOD SetSelected(PRBool aSelected, PRInt32 aBeginOffset, PRInt32 aEndOffset, PRBool aForceRedraw);
NS_IMETHOD SetSelectedContentOffsets(PRBool aSelected, PRInt32 aBeginContentOffset, PRInt32 aEndContentOffset,
PRInt32 aAnchorOffset, PRInt32 aFocusOffset, PRBool aForceRedraw,
nsIFocusTracker *aTracker,
nsIFrame **aActualSelected);
NS_IMETHOD GetSelected(PRBool *aSelected, PRInt32 *aBeginOffset, PRInt32 *aEndOffset, PRInt32 *aBeginContentOffset);
NS_IMETHOD PeekOffset(nsSelectionAmount aAmount, nsDirection aDirection, PRInt32 aStartOffset,
nsIFrame **aResultFrame, PRInt32 *aFrameOffset, PRInt32 *aContentOffset,
PRBool aEatingWS);
NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const;
NS_IMETHOD GetPointFromOffset(nsIPresContext* inPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint);
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRInt32* outFrameContentOffset,
nsIFrame* *outChildFrame);
// nsIHTMLReflow
NS_IMETHOD FindTextRuns(nsLineLayout& aLineLayout);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
NS_IMETHOD TrimTrailingWhiteSpace(nsIPresContext& aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth);
/* // TextFrame methods
struct SelectionInfo {
PRInt32 mStartOffset;
PRInt32 mEndOffset;
PRBool mEmptySelection;
};
*/
/* void ComputeSelectionInfo(nsIRenderingContext& aRenderingContext,
nsIDocument* aDocument,
PRInt32* aIndicies, PRInt32 aTextLength,
SelectionInfo& aResult);*/
struct TextStyle {
const nsStyleFont* mFont;
const nsStyleText* mText;
const nsStyleColor* mColor;
nsIFontMetrics* mNormalFont;
nsIFontMetrics* mSmallFont;
nsIFontMetrics* mLastFont;
PRBool mSmallCaps;
nscoord mWordSpacing;
nscoord mLetterSpacing;
nscolor mSelectionTextColor;
nscolor mSelectionBGColor;
nscoord mSpaceWidth;
PRBool mJustifying;
PRIntn mNumSpaces;
nscoord mExtraSpacePerSpace;
nscoord mRemainingExtraSpace;
TextStyle(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* sc)
{
// Get style data
mColor = (const nsStyleColor*) sc->GetStyleData(eStyleStruct_Color);
mFont = (const nsStyleFont*) sc->GetStyleData(eStyleStruct_Font);
mText = (const nsStyleText*) sc->GetStyleData(eStyleStruct_Text);
aRenderingContext.SetColor(mColor->mColor);
// Get the normal font
nsFont plainFont(mFont->mFont);
plainFont.decorations = NS_FONT_DECORATION_NONE;
aPresContext.GetMetricsFor(plainFont, &mNormalFont);
aRenderingContext.SetFont(mNormalFont);
aRenderingContext.GetWidth(' ', mSpaceWidth);
mLastFont = mNormalFont;
// Get the small-caps font if needed
mSmallCaps = NS_STYLE_FONT_VARIANT_SMALL_CAPS == plainFont.variant;
if (mSmallCaps) {
plainFont.size = nscoord(0.7 * plainFont.size);
aPresContext.GetMetricsFor(plainFont, &mSmallFont);
}
else {
mSmallFont = nsnull;
}
// XXX Get these from style
mSelectionBGColor = NS_RGB(0, 0, 0);
mSelectionTextColor = NS_RGB(255, 255, 255);
// Get the word and letter spacing
mWordSpacing = 0;
mLetterSpacing = 0;
if (NS_STYLE_WHITESPACE_PRE != mText->mWhiteSpace) {
PRIntn unit = mText->mWordSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
mWordSpacing = mText->mWordSpacing.GetCoordValue();
}
unit = mText->mLetterSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
mLetterSpacing = mText->mLetterSpacing.GetCoordValue();
}
}
mNumSpaces = 0;
mRemainingExtraSpace = 0;
mExtraSpacePerSpace = 0;
}
~TextStyle() {
NS_RELEASE(mNormalFont);
NS_IF_RELEASE(mSmallFont);
}
};
PRIntn PrepareUnicodeText(nsTextTransformer& aTransformer,
PRInt32* aIndicies,
PRUnichar* aBuffer,
PRInt32& aTextLen,
nscoord& aNewWidth);
void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord aX, nscoord aY, nscoord aWidth);
void PaintTextSlowly(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord aX, nscoord aY);
void RenderString(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aX, nscoord aY,
nscoord aWidth);
void MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
TextStyle& aStyle,
PRUnichar* aWord,
PRInt32 aWordLength,
nscoord& aWidthResult);
void GetWidth(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord& aWidthResult);
void PaintUnicodeText(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord dx, nscoord dy);
void PaintAsciiText(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord dx, nscoord dy);
nscoord ComputeTotalWordWidth(nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nscoord aBaseWidth);
nscoord ComputeWordFragmentWidth(nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nsITextContent* aText,
PRBool& aStop);
void ToCString(nsString& aBuf, PRInt32& aContentLength) const;
protected:
virtual ~TextFrame();
// XXX pack this tighter?
PRInt32 mContentOffset;
PRInt32 mContentLength;
PRUint32 mFlags;
PRInt32 mColumn;
nscoord mComputedWidth;
PRInt32 mSelectionOffset;//<0 =0 >mContentLength = mContentLength
PRInt32 mSelectionEnd; //-1 == all
};
// Flag information used by rendering code. This information is
// computed by the ResizeReflow code. Remaining bits are used by the
// tab count.
// Flag indicating that whitespace was skipped
#define TEXT_SKIP_LEADING_WS 0x01
#define TEXT_HAS_MULTIBYTE 0x02
#define TEXT_BLINK_ON 0x04
#define TEXT_IN_WORD 0x08
#define TEXT_TRIMMED_WS 0x10
//----------------------------------------------------------------------
static PRBool gBlinkTextOff;
static BlinkTimer* gTextBlinker;
#ifdef NOISY_BLINK
static PRTime gLastTick;
#endif
BlinkTimer::BlinkTimer()
{
NS_INIT_REFCNT();
mTimer = nsnull;
}
BlinkTimer::~BlinkTimer()
{
Stop();
}
void BlinkTimer::Start()
{
nsresult rv = NS_NewTimer(&mTimer);
if (NS_OK == rv) {
mTimer->Init(this, 750);
}
}
void BlinkTimer::Stop()
{
if (nsnull != mTimer) {
mTimer->Cancel();
NS_RELEASE(mTimer);
}
}
static NS_DEFINE_IID(kITimerCallbackIID, NS_ITIMERCALLBACK_IID);
NS_IMPL_ISUPPORTS(BlinkTimer, kITimerCallbackIID);
void BlinkTimer::AddFrame(TextFrame* aFrame) {
mFrames.AppendElement(aFrame);
if (1 == mFrames.Count()) {
Start();
}
}
PRBool BlinkTimer::RemoveFrame(TextFrame* aFrame) {
PRBool rv = mFrames.RemoveElement(aFrame);
if (0 == mFrames.Count()) {
Stop();
}
return rv;
}
PRInt32 BlinkTimer::FrameCount() {
return mFrames.Count();
}
void BlinkTimer::Notify(nsITimer *timer)
{
// Toggle blink state bit so that text code knows whether or not to
// render. All text code shares the same flag so that they all blink
// in unison.
gBlinkTextOff = PRBool(!gBlinkTextOff);
// XXX hack to get auto-repeating timers; restart before doing
// expensive work so that time between ticks is more even
Stop();
Start();
#ifdef NOISY_BLINK
PRTime now = PR_Now();
char buf[50];
PRTime delta;
LL_SUB(delta, now, gLastTick);
gLastTick = now;
PR_snprintf(buf, sizeof(buf), "%lldusec", delta);
printf("%s\n", buf);
#endif
PRInt32 i, n = mFrames.Count();
for (i = 0; i < n; i++) {
TextFrame* text = (TextFrame*) mFrames.ElementAt(i);
// Determine damaged area and tell view manager to redraw it
nsPoint offset;
nsRect bounds;
text->GetRect(bounds);
nsIView* view;
text->GetOffsetFromView(offset, &view);
nsIViewManager* vm;
view->GetViewManager(vm);
bounds.x = offset.x;
bounds.y = offset.y;
vm->UpdateView(view, bounds, 0);
NS_RELEASE(vm);
}
}
//----------------------------------------------------------------------
nsresult
NS_NewTextFrame(nsIFrame*& aResult)
{
nsIFrame* frame = new TextFrame;
if (nsnull == frame) {
return NS_ERROR_OUT_OF_MEMORY;
}
aResult = frame;
return NS_OK;
}
TextFrame::TextFrame()
: nsSplittableFrame()
{
if (nsnull == gTextBlinker) {
// Create text timer the first time out
gTextBlinker = new BlinkTimer();
}
mSelectionOffset = -1;
mSelectionEnd = -1;
NS_ADDREF(gTextBlinker);
}
TextFrame::~TextFrame()
{
if (0 != (mFlags & TEXT_BLINK_ON)) {
NS_ASSERTION(nsnull != gTextBlinker, "corrupted blinker");
gTextBlinker->RemoveFrame(this);
}
if (0 == gTextBlinker->Release()) {
// Release text timer when the last text frame is gone
gTextBlinker = nsnull;
}
}
NS_IMETHODIMP
TextFrame::GetCursor(nsIPresContext& aPresContext,
nsPoint& aPoint,
PRInt32& aCursor)
{
const nsStyleColor* styleColor;
GetStyleData(eStyleStruct_Color, (const nsStyleStruct*&)styleColor);
aCursor = styleColor->mCursor;
if (NS_STYLE_CURSOR_AUTO == aCursor && nsnull != mParent) {
mParent->GetCursor(aPresContext, aPoint, aCursor);
if (NS_STYLE_CURSOR_AUTO == aCursor) {
aCursor = NS_STYLE_CURSOR_TEXT;
}
}
return NS_OK;
}
NS_IMETHODIMP
TextFrame::ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent)
{
// Generate a reflow command with this frame as the target frame
nsIReflowCommand* cmd;
nsresult rv;
rv = NS_NewHTMLReflowCommand(&cmd, this, nsIReflowCommand::ContentChanged);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPresShell> shell;
rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
shell->AppendReflowCommand(cmd);
NS_RELEASE(cmd);
}
}
return rv;
}
NS_IMETHODIMP
TextFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
if (eFramePaintLayer_Content != aWhichLayer) {
return NS_OK;
}
if ((0 != (mFlags & TEXT_BLINK_ON)) && gBlinkTextOff) {
return NS_OK;
}
nsIStyleContext* sc = mStyleContext;
const nsStyleDisplay* disp = (const nsStyleDisplay*)
sc->GetStyleData(eStyleStruct_Display);
if (disp->mVisible) {
TextStyle ts(aPresContext, aRenderingContext, mStyleContext);
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing) ||
((NS_STYLE_TEXT_ALIGN_JUSTIFY == ts.mText->mTextAlign) &&
(mRect.width > mComputedWidth))) {
PaintTextSlowly(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
else {
// Choose rendering pathway based on rendering context
// performance hint.
PRUint32 hints = 0;
aRenderingContext.GetHints(hints);
if ((TEXT_HAS_MULTIBYTE & mFlags) ||
(0 == (hints & NS_RENDERING_HINT_FAST_8BIT_TEXT))) {
// Use PRUnichar rendering routine
PaintUnicodeText(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
else {
// Use char rendering routine
PaintAsciiText(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
}
}
return NS_OK;
}
/**
* Prepare the text in the content for rendering. If aIndexes is not nsnull
* then fill in aIndexes's with the mapping from the original input to
* the prepared output.
*/
PRIntn
TextFrame::PrepareUnicodeText(nsTextTransformer& aTX,
PRInt32* aIndexes,
PRUnichar* aBuffer,
PRInt32& aTextLen,
nscoord& aNewWidth)
{
PRIntn numSpaces = 0;
PRUnichar* dst = aBuffer;
// Setup transform to operate starting in the content at our content
// offset
aTX.Init(this, mContentOffset);
PRInt32 strInx = mContentOffset;
// Skip over the leading whitespace
PRInt32 n = mContentLength;
if (0 != (mFlags & TEXT_SKIP_LEADING_WS)) {
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
aTX.GetNextWord(PR_FALSE, wordLen, contentLen, isWhitespace);
NS_ASSERTION(isWhitespace, "mFlags and content are out of sync");
if (isWhitespace) {
if (nsnull != aIndexes) {
// Point mapping indicies at the same content index since
// all of the compressed whitespace maps down to the same
// renderable character.
PRInt32 i = contentLen;
while (--i >= 0) {
*aIndexes++ = strInx;
}
}
n -= contentLen;
NS_ASSERTION(n >= 0, "whoops");
}
}
// Rescan the content and transform it. Stop when we have consumed
// mContentLength characters.
PRBool inWord = (TEXT_IN_WORD & mFlags) ? PR_TRUE : PR_FALSE;
PRInt32 column = mColumn;
PRInt32 textLength = 0;
while (0 != n) {
PRUnichar* bp;
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
// Get the next word
bp = aTX.GetNextWord(inWord, wordLen, contentLen, isWhitespace);
if (nsnull == bp) {
break;
}
if (contentLen > n) {
contentLen = n;
}
if (wordLen > n) {
wordLen = n;
}
inWord = PR_FALSE;
if (isWhitespace) {
numSpaces++;
if ('\t' == bp[0]) {
PRInt32 spaces = 8 - (7 & column);
PRUnichar* tp = bp;
wordLen = spaces;
while (--spaces >= 0) {
*tp++ = ' ';
}
// XXX This is a one to many mapping that I think isn't handled well
if (nsnull != aIndexes) {
*aIndexes++ = strInx;
strInx++;
}
}
else if (0 == wordLen) {
break;
}
else if (nsnull != aIndexes) {
// Point mapping indicies at the same content index since
// all of the compressed whitespace maps down to the same
// renderable character.
PRInt32 i = contentLen;
while (--i >= 0) {
*aIndexes++ = strInx;
}
strInx++;
}
}
else {
if (nsnull != aIndexes) {
// Point mapping indicies at each content index in the word
PRInt32 i = contentLen;
while (--i >= 0) {
*aIndexes++ = strInx++;
}
}
}
column += wordLen;
textLength += wordLen;
n -= contentLen;
nsCRT::memcpy(dst, bp, sizeof(PRUnichar) * wordLen);
dst += wordLen;
}
// Remove trailing whitespace if it was trimmed after reflow
if (TEXT_TRIMMED_WS & mFlags) {
if (--dst >= aBuffer) {
PRUnichar ch = *dst;
if (XP_IS_SPACE(ch)) {
textLength--;
}
}
numSpaces--;
}
aTextLen = textLength;
return numSpaces;
}
#define SHOW_SELECTION_CURSOR // should be turned off when the caret code is activated
#ifdef SHOW_SELECTION_CURSOR
// XXX This clearly needs to be done by the container, *somehow*
#define CURSOR_COLOR NS_RGB(0,0,255)
static void
RenderSelectionCursor(nsIRenderingContext& aRenderingContext,
nscoord dx, nscoord dy, nscoord aHeight,
nscolor aCursorColor)
{
nsPoint pnts[4];
nscoord ox = aHeight / 4;
nscoord oy = ox;
nscoord x0 = dx;
nscoord y0 = dy + aHeight;
pnts[0].x = x0 - ox;
pnts[0].y = y0;
pnts[1].x = x0;
pnts[1].y = y0 - oy;
pnts[2].x = x0 + ox;
pnts[2].y = y0;
pnts[3].x = x0 - ox;
pnts[3].y = y0;
// Draw little blue triangle
aRenderingContext.SetColor(aCursorColor);
aRenderingContext.FillPolygon(pnts, 4);
}
#endif
// XXX letter-spacing
// XXX word-spacing
void
TextFrame::PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord aX, nscoord aY, nscoord aWidth)
{
nscolor overColor;
nscolor underColor;
nscolor strikeColor;
nsIStyleContext* context = aStyleContext;
PRUint8 decorations = aTextStyle.mFont->mFont.decorations;
PRUint8 decorMask = decorations;
NS_ADDREF(context);
do { // find decoration colors
const nsStyleText* styleText =
(const nsStyleText*)context->GetStyleData(eStyleStruct_Text);
if (decorMask & styleText->mTextDecoration) { // a decoration defined here
const nsStyleColor* styleColor =
(const nsStyleColor*)context->GetStyleData(eStyleStruct_Color);
if (NS_STYLE_TEXT_DECORATION_UNDERLINE & decorMask & styleText->mTextDecoration) {
underColor = styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
}
if (NS_STYLE_TEXT_DECORATION_OVERLINE & decorMask & styleText->mTextDecoration) {
overColor = styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
}
if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & decorMask & styleText->mTextDecoration) {
strikeColor = styleColor->mColor;
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
}
}
if (0 != decorMask) {
nsIStyleContext* lastContext = context;
context = context->GetParent();
NS_RELEASE(lastContext);
}
} while ((nsnull != context) && (0 != decorMask));
NS_IF_RELEASE(context);
nscoord offset;
nscoord size;
nscoord baseline;
aTextStyle.mNormalFont->GetMaxAscent(baseline);
if (decorations & (NS_FONT_DECORATION_OVERLINE | NS_FONT_DECORATION_UNDERLINE)) {
aTextStyle.mNormalFont->GetUnderline(offset, size);
if (decorations & NS_FONT_DECORATION_OVERLINE) {
aRenderingContext.SetColor(overColor);
aRenderingContext.FillRect(aX, aY, aWidth, size);
}
if (decorations & NS_FONT_DECORATION_UNDERLINE) {
aRenderingContext.SetColor(underColor);
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}
}
if (decorations & NS_FONT_DECORATION_LINE_THROUGH) {
aTextStyle.mNormalFont->GetStrikeout(offset, size);
aRenderingContext.SetColor(strikeColor);
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}
}
void
TextFrame::PaintUnicodeText(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext.GetShell(getter_AddRefs(shell));
nsCOMPtr<nsIDocument> doc;
shell->GetDocument(getter_AddRefs(doc));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
PRUnichar wordBufMem[WORD_BUF_SIZE];
PRUnichar paintBufMem[TEXT_BUF_SIZE];
PRInt32 indicies[TEXT_BUF_SIZE];
PRInt32* ip = indicies;
PRUnichar* paintBuf = paintBufMem;
if (mContentLength > TEXT_BUF_SIZE) {
ip = new PRInt32[mContentLength+1];
paintBuf = new PRUnichar[mContentLength];
}
nscoord width = mRect.width;
PRInt32 textLength;
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb);
PrepareUnicodeText(tx,
displaySelection ? ip : nsnull,
paintBuf, textLength, width);
ip[mContentLength] = ip[mContentLength-1]+1; //must set up last one for selection beyond edge
PRUnichar* text = paintBuf;
if (0 != textLength) {
if (!displaySelection || !mSelected || mSelectionOffset > mContentLength) {
//if selection is > content length then selection has "slid off"
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
dx, dy, width);
}
else {
/* SelectionInfo si;
ComputeSelectionInfo(aRenderingContext, doc, ip, textLength, si);*/
nscoord textWidth;
if (mSelectionOffset < 0)
mSelectionOffset = 0;
if (mSelectionEnd < 0)
mSelectionEnd = mContentLength;
if (mSelectionEnd > mContentLength)
mSelectionEnd = mContentLength;
if (mSelectionOffset > mContentLength)
mSelectionOffset = mContentLength;
PRInt32 selectionEnd = mSelectionEnd;
PRInt32 selectionOffset = mSelectionOffset;
if (mSelectionEnd < mSelectionOffset)
{
selectionEnd = mSelectionOffset;
selectionOffset = mSelectionEnd;
}
//where are the selection points "really"
selectionOffset = ip[selectionOffset] - mContentOffset;
selectionEnd = ip[selectionEnd] - mContentOffset;
if (selectionOffset == selectionEnd){
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext,
aTextStyle, dx, dy, width);
// aRenderingContext.GetWidth(text, PRUint32(si.mStartOffset), textWidth);
shell->RefreshCaret();
#ifdef SHOW_SELECTION_CURSOR
aRenderingContext.GetWidth(text, PRUint32(selectionOffset), textWidth);
RenderSelectionCursor(aRenderingContext,
dx + textWidth, dy, mRect.height,
CURSOR_COLOR);
#endif
}
else {
nscoord x = dx;
if (selectionOffset) {
// Render first (unselected) section
aRenderingContext.GetWidth(text, PRUint32(selectionOffset),//si.mStartOffset),
textWidth);
aRenderingContext.DrawString(text, PRUint32(selectionOffset),
x, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
x, dy, textWidth);
x += textWidth;
}
PRInt32 secondLen = selectionEnd - selectionOffset;
if (0 != secondLen) {
// Get the width of the second (selected) section
aRenderingContext.GetWidth(text + selectionOffset,
PRUint32(secondLen), textWidth);
// Render second (selected) section
aRenderingContext.SetColor(aTextStyle.mSelectionBGColor);
aRenderingContext.FillRect(x, dy, textWidth, mRect.height);
aRenderingContext.SetColor(aTextStyle.mSelectionTextColor);
aRenderingContext.DrawString(text + selectionOffset,
PRUint32(secondLen), x, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
x, dy, textWidth);
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
x += textWidth;
}
if (textLength != selectionEnd) {
PRInt32 thirdLen = textLength - selectionEnd;
if (thirdLen > 0) //Text length is not negative or zero
{
// Render third (unselected) section
aRenderingContext.GetWidth(text + selectionEnd, PRUint32(thirdLen),
textWidth);
aRenderingContext.DrawString(text + selectionEnd,
PRUint32(thirdLen), x, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
x, dy, textWidth);
}
}
}
}
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
if (ip != indicies) {
delete [] ip;
}
}
void
TextFrame::RenderString(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aX, nscoord aY,
nscoord aWidth)
{
PRUnichar buf[TEXT_BUF_SIZE];
PRUnichar* bp0 = buf;
if (aLength > TEXT_BUF_SIZE) {
bp0 = new PRUnichar[aLength];
}
PRUnichar* bp = bp0;
PRBool spacing = (0 != aTextStyle.mLetterSpacing) ||
(0 != aTextStyle.mWordSpacing) || (mRect.width > mComputedWidth);
nscoord spacingMem[TEXT_BUF_SIZE];
PRIntn* sp0 = spacingMem;
if (spacing && (aLength > TEXT_BUF_SIZE)) {
sp0 = new nscoord[aLength];
}
PRIntn* sp = sp0;
nscoord smallY = aY;
if (aTextStyle.mSmallCaps) {
nscoord normalAscent, smallAscent;
aTextStyle.mNormalFont->GetMaxAscent(normalAscent);
aTextStyle.mSmallFont->GetMaxAscent(smallAscent);
if (normalAscent > smallAscent) {
smallY = aY + normalAscent - smallAscent;
}
}
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
nscoord lastY = aY;
if (lastFont == aTextStyle.mSmallFont) {
lastY = smallY;
}
PRInt32 pendingCount;
PRUnichar* runStart = bp;
nscoord charWidth, width = 0;
for (; --aLength >= 0; aBuffer++) {
nsIFontMetrics* nextFont;
nscoord nextY, glyphWidth;
PRUnichar ch = *aBuffer;
if (aTextStyle.mSmallCaps && nsCRT::IsLower(ch)) {
nextFont = aTextStyle.mSmallFont;
nextY = smallY;
ch = nsCRT::ToUpper(ch);
if (lastFont != aTextStyle.mSmallFont) {
aRenderingContext.SetFont(aTextStyle.mSmallFont);
aRenderingContext.GetWidth(ch, charWidth);
aRenderingContext.SetFont(aTextStyle.mNormalFont);
}
else {
aRenderingContext.GetWidth(ch, charWidth);
}
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
}
else if (ch == ' ') {
nextFont = aTextStyle.mNormalFont;
nextY = aY;
glyphWidth = aTextStyle.mSpaceWidth + aTextStyle.mWordSpacing;
nscoord extra = aTextStyle.mExtraSpacePerSpace;
if (--aTextStyle.mNumSpaces == 0) {
extra += aTextStyle.mRemainingExtraSpace;
}
glyphWidth += extra;
}
else {
if (lastFont != aTextStyle.mNormalFont) {
aRenderingContext.SetFont(aTextStyle.mNormalFont);
aRenderingContext.GetWidth(ch, charWidth);
aRenderingContext.SetFont(aTextStyle.mSmallFont);
}
else {
aRenderingContext.GetWidth(ch, charWidth);
}
nextFont = aTextStyle.mNormalFont;
nextY = aY;
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
}
if (nextFont != lastFont) {
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Measure previous run of characters using the previous font
aRenderingContext.DrawString(runStart, pendingCount,
aX, lastY, -1,
spacing ? sp0 : nsnull);
// Note: use aY not small-y so that decorations are drawn with
// respect to the normal-font not the current font.
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
aX, aY, width);
aWidth -= width;
aX += width;
runStart = bp = bp0;
sp = sp0;
width = 0;
}
aRenderingContext.SetFont(nextFont);
lastFont = nextFont;
lastY = nextY;
}
*bp++ = ch;
*sp++ = glyphWidth;
width += glyphWidth;
}
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Measure previous run of characters using the previous font
aRenderingContext.DrawString(runStart, pendingCount, aX, lastY, -1,
spacing ? sp0 : nsnull);
// Note: use aY not small-y so that decorations are drawn with
// respect to the normal-font not the current font.
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
aX, aY, aWidth);
}
aTextStyle.mLastFont = lastFont;
if (bp0 != buf) {
delete [] bp0;
}
if (sp0 != spacingMem) {
delete [] sp0;
}
}
inline void
TextFrame::MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
TextStyle& aTextStyle,
PRUnichar* aWord,
PRInt32 aWordLength,
nscoord& aWidthResult)
{
nsIRenderingContext& rc = *aReflowState.rendContext;
GetWidth(rc, aTextStyle, aWord, aWordLength, aWidthResult);
if (aTextStyle.mLastFont != aTextStyle.mNormalFont) {
rc.SetFont(aTextStyle.mNormalFont);
aTextStyle.mLastFont = aTextStyle.mNormalFont;
}
}
// XXX factor in logic from RenderString into here; gaps, justification, etc.
void
TextFrame::GetWidth(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord& aWidthResult)
{
PRUnichar buf[TEXT_BUF_SIZE];
PRUnichar* bp0 = buf;
if (aLength > TEXT_BUF_SIZE) {
bp0 = new PRUnichar[aLength];
}
PRUnichar* bp = bp0;
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
nscoord w, sum = 0;
PRInt32 pendingCount;
PRUnichar* runStart = bp;
for (; --aLength >= 0; aBuffer++) {
nsIFontMetrics* nextFont;
PRUnichar ch = *aBuffer;
if (aTextStyle.mSmallCaps && nsCRT::IsLower(ch)) {
nextFont = aTextStyle.mSmallFont;
ch = nsCRT::ToUpper(ch);
}
else {
nextFont = aTextStyle.mNormalFont;
}
if (nextFont != lastFont) {
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Measure previous run of characters using the previous font
aRenderingContext.GetWidth(runStart, pendingCount, w);
sum += w;
runStart = bp;
}
aRenderingContext.SetFont(nextFont);
lastFont = nextFont;
}
*bp++ = ch;
}
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Measure previous run of characters using the previous font
aRenderingContext.GetWidth(runStart, pendingCount, w);
sum += w;
}
if (bp0 != buf) {
delete [] bp0;
}
aTextStyle.mLastFont = lastFont;
aWidthResult = sum;
}
void
TextFrame::PaintTextSlowly(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext.GetShell(getter_AddRefs(shell));
nsCOMPtr<nsIDocument> doc;
shell->GetDocument(getter_AddRefs(doc));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
PRUnichar wordBufMem[WORD_BUF_SIZE];
PRUnichar paintBufMem[TEXT_BUF_SIZE];
PRInt32 indicies[TEXT_BUF_SIZE];
PRInt32* ip = indicies;
PRUnichar* paintBuf = paintBufMem;
if (mContentLength > TEXT_BUF_SIZE) {
ip = new PRInt32[mContentLength+1];
paintBuf = new PRUnichar[mContentLength];
}
nscoord width = mRect.width;
PRInt32 textLength;
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE, lb);
aTextStyle.mNumSpaces = PrepareUnicodeText(tx,
displaySelection ? ip : nsnull,
paintBuf, textLength, width);
ip[mContentLength] = ip[mContentLength-1]+1; //must set up last one for selection beyond edge
if (mRect.width > mComputedWidth) {
if (0 != aTextStyle.mNumSpaces) {
nscoord extra = mRect.width - mComputedWidth;
#if XXX
nscoord adjustPerSpace =
aTextStyle.mExtraSpacePerSpace = extra / aTextStyle.mNumSpaces;
#endif
aTextStyle.mRemainingExtraSpace = extra -
(aTextStyle.mExtraSpacePerSpace * aTextStyle.mNumSpaces);
}
else {
// We have no whitespace but were given some extra space. There
// are two plausible places to put the extra space: to the left
// and to the right. If this is anywhere but the last place on
// the line then the correct answer is to the right.
}
}
PRUnichar* text = paintBuf;
if (0 != textLength) {
if (!displaySelection || !mSelected || mSelectionOffset > mContentLength) {
// When there is no selection showing, use the fastest and
// simplest rendering approach
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text, textLength, dx, dy, width);
}
else {
nscoord textWidth;
if (mSelectionOffset < 0)
mSelectionOffset = 0;
if (mSelectionEnd < 0)
mSelectionEnd = mContentLength;
if (mSelectionEnd > mContentLength)
mSelectionEnd = mContentLength;
if (mSelectionOffset > mContentLength)
mSelectionOffset = mContentLength;
PRInt32 selectionEnd = mSelectionEnd;
PRInt32 selectionOffset = mSelectionOffset;
if (mSelectionEnd < mSelectionOffset)
{
selectionEnd = mSelectionOffset;
selectionOffset = mSelectionEnd;
}
//where are the selection points "really"
selectionOffset = ip[selectionOffset] - mContentOffset;
selectionEnd = ip[selectionEnd] - mContentOffset;
if (selectionOffset == selectionEnd){
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text, textLength, dx, dy, width);
shell->RefreshCaret();
#ifdef SHOW_SELECTION_CURSOR
GetWidth(aRenderingContext, aTextStyle,
text, PRUint32(selectionOffset), textWidth);
RenderSelectionCursor(aRenderingContext,
dx + textWidth, dy, mRect.height,
CURSOR_COLOR);
#endif
}
else {
nscoord x = dx;
if (selectionOffset) {
// Render first (unselected) section
GetWidth(aRenderingContext, aTextStyle,
text, PRUint32(selectionOffset),
textWidth);
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text, selectionOffset,
x, dy, textWidth);
x += textWidth;
}
PRInt32 secondLen = selectionEnd - selectionOffset;
if (0 != secondLen) {
// Get the width of the second (selected) section
GetWidth(aRenderingContext, aTextStyle,
text + selectionOffset,
PRUint32(secondLen), textWidth);
// Render second (selected) section
aRenderingContext.SetColor(aTextStyle.mSelectionBGColor);
aRenderingContext.FillRect(x, dy, textWidth, mRect.height);
aRenderingContext.SetColor(aTextStyle.mSelectionTextColor);
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text + selectionOffset, secondLen,
x, dy, textWidth);
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
x += textWidth;
}
if (textLength != selectionEnd) {
PRInt32 thirdLen = textLength - selectionEnd;
// Render third (unselected) section
if (thirdLen > 0) //Text length is not negative or zero
{
GetWidth(aRenderingContext, aTextStyle,
text + selectionOffset, PRUint32(thirdLen),
textWidth);
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text + selectionEnd,
thirdLen, x, dy, textWidth);
}
}
}
}
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
if (ip != indicies) {
delete [] ip;
}
}
void
TextFrame::PaintAsciiText(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsIPresShell> shell;
aPresContext.GetShell(getter_AddRefs(shell));
nsCOMPtr<nsIDocument> doc;
shell->GetDocument(getter_AddRefs(doc));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
PRUnichar wordBufMem[WORD_BUF_SIZE];
char paintBufMem[TEXT_BUF_SIZE];
PRUnichar rawPaintBufMem[TEXT_BUF_SIZE];
PRInt32 indicies[TEXT_BUF_SIZE];
PRInt32* ip = indicies;
char* paintBuf = paintBufMem;
PRUnichar* rawPaintBuf = rawPaintBufMem;
if (mContentLength > TEXT_BUF_SIZE) {
ip = new PRInt32[mContentLength];
paintBuf = new char[mContentLength];
rawPaintBuf = new PRUnichar[mContentLength];
}
nscoord width = mRect.width;
PRInt32 textLength;
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb);
PrepareUnicodeText(tx,
displaySelection ? ip : nsnull,
rawPaintBuf, textLength, width);
ip[mContentLength] = ip[mContentLength-1]+1; //must set up last one for selection beyond edge
// Translate unicode data into ascii for rendering
char* dst = paintBuf;
char* end = dst + textLength;
PRUnichar* src = rawPaintBuf;
while (dst < end) {
*dst++ = (char) ((unsigned char) *src++);
}
char* text = paintBuf;
if (0 != textLength) {
if (!displaySelection || !mSelected || mSelectionOffset > mContentLength) {
//if selection is > content length then selection has "slid off"
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
dx, dy, width);
}
else {
/* SelectionInfo si;
ComputeSelectionInfo(aRenderingContext, doc, ip, textLength, si);*/
nscoord textWidth;
if (mSelectionOffset < 0)
mSelectionOffset = 0;
if (mSelectionEnd < 0)
mSelectionEnd = mContentLength;
if (mSelectionEnd > mContentLength)
mSelectionEnd = mContentLength;
if (mSelectionOffset > mContentLength)
mSelectionOffset = mContentLength;
PRInt32 selectionEnd = mSelectionEnd;
PRInt32 selectionOffset = mSelectionOffset;
if (mSelectionEnd < mSelectionOffset)
{
selectionEnd = mSelectionOffset;
selectionOffset = mSelectionEnd;
}
//where are the selection points "really"
selectionOffset = ip[selectionOffset] - mContentOffset;
selectionEnd = ip[selectionEnd] - mContentOffset;
if (selectionOffset == selectionEnd){
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext,
aTextStyle, dx, dy, width);
// aRenderingContext.GetWidth(text, PRUint32(si.mStartOffset), textWidth);
shell->RefreshCaret();
#ifdef SHOW_SELECTION_CURSOR
aRenderingContext.GetWidth(text, PRUint32(selectionOffset), textWidth);
RenderSelectionCursor(aRenderingContext,
dx + textWidth, dy, mRect.height,
CURSOR_COLOR);
#endif
}
else
{
nscoord x = dx;
if (selectionOffset) {
// Render first (unselected) section
aRenderingContext.GetWidth(text, PRUint32(selectionOffset),//si.mStartOffset),
textWidth);
aRenderingContext.DrawString(text, PRUint32(selectionOffset),
x, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
x, dy, textWidth);
x += textWidth;
}
PRInt32 secondLen = selectionEnd - selectionOffset;
if (0 != secondLen) {
// Get the width of the second (selected) section
aRenderingContext.GetWidth(text + selectionOffset,
PRUint32(secondLen), textWidth);
// Render second (selected) section
aRenderingContext.SetColor(aTextStyle.mSelectionBGColor);
aRenderingContext.FillRect(x, dy, textWidth, mRect.height);
aRenderingContext.SetColor(aTextStyle.mSelectionTextColor);
aRenderingContext.DrawString(text + selectionOffset,
PRUint32(secondLen), x, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
x, dy, textWidth);
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
x += textWidth;
}
if (textLength != selectionEnd) {
PRInt32 thirdLen = textLength - selectionEnd;
if (thirdLen > 0) //Text length is not negative or zero
{
// Render third (unselected) section
aRenderingContext.GetWidth(text + selectionEnd, PRUint32(thirdLen),
textWidth);
aRenderingContext.DrawString(text + selectionEnd,
PRUint32(thirdLen), x, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
x, dy, textWidth);
}
}
}
}
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
if (ip != indicies) {
delete [] ip;
}
}
NS_IMETHODIMP
TextFrame::FindTextRuns(nsLineLayout& aLineLayout)
{
if (nsnull == mPrevInFlow) {
aLineLayout.AddText(this);
}
return NS_OK;
}
//---------------------------------------------------
// Uses a binary search for find where the cursor falls in the line of text
// It also keeps track of the part of the string that has already been measured
// so it doesn't have to keep measuring the same text over and over
//
// Param "aBaseWidth" contains the width in twips of the portion
// of the text that has already been measured, and aBaseInx contains
// the index of the text that has already been measured.
//
// aTextWidth returns the (in twips) the length of the text that falls before the cursor
// aIndex contains the index of the text where the cursor falls
static PRBool
BinarySearchForPosition(nsIRenderingContext* acx,
PRUnichar* aText,
PRInt32 aBaseWidth,
PRInt32 aBaseInx,
PRInt32 aStartInx,
PRInt32 aEndInx,
PRInt32 aCursorPos,
PRInt32& aIndex,
PRInt32& aTextWidth)
{
PRInt32 range = aEndInx - aStartInx;
if (range == 1) {
aIndex = aStartInx + aBaseInx;
acx->GetWidth(aText, aIndex, aTextWidth);
return PR_TRUE;
}
PRInt32 inx = aStartInx + (range / 2);
PRInt32 textWidth;
acx->GetWidth(aText, inx, textWidth);
PRInt32 fullWidth = aBaseWidth + textWidth;
if (fullWidth == aCursorPos) {
aIndex = inx;
return PR_TRUE;
} else if (aCursorPos < fullWidth) {
aTextWidth = aBaseWidth;
if (BinarySearchForPosition(acx, aText, aBaseWidth, aBaseInx, aStartInx, inx, aCursorPos, aIndex, aTextWidth)) {
return PR_TRUE;
}
} else {
aTextWidth = fullWidth;
if (BinarySearchForPosition(acx, aText, aBaseWidth, aBaseInx, inx, aEndInx, aCursorPos, aIndex, aTextWidth)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
//---------------------------------------------------------------------------
// Uses a binary search to find the position of the cursor in the text.
// The "indices array is used to map from the compressed text back to the
// un-compressed text, selection is based on the un-compressed text, the visual
// display of selection is based on the compressed text.
//---------------------------------------------------------------------------
NS_IMETHODIMP
TextFrame::GetPosition(nsIPresContext& aCX,
nsIRenderingContext * aRendContext,
nsGUIEvent* aEvent,
nsIFrame* aNewFrame,
PRUint32& aAcutalContentOffset,
PRInt32& aOffset)
{
PRUnichar wordBufMem[WORD_BUF_SIZE];
PRUnichar paintBufMem[TEXT_BUF_SIZE];
PRInt32 indicies[TEXT_BUF_SIZE];
PRInt32* ip = indicies;
PRUnichar* paintBuf = paintBufMem;
if (mContentLength >= TEXT_BUF_SIZE) {
ip = new PRInt32[mContentLength+1];
paintBuf = new PRUnichar[mContentLength];
}
nscoord width = 0;
PRInt32 textLength;
// Find the font metrics for this text
nsIStyleContext* styleContext;
aNewFrame->GetStyleContext(&styleContext);
const nsStyleFont *font = (const nsStyleFont*)
styleContext->GetStyleData(eStyleStruct_Font);
NS_RELEASE(styleContext);
nsCOMPtr<nsIFontMetrics> fm;
aCX.GetMetricsFor(font->mFont, getter_AddRefs(fm));
aRendContext->SetFont(fm);
nsCOMPtr<nsIPresShell> shell;
aCX.GetShell(getter_AddRefs(shell));
nsCOMPtr<nsIDocument> doc;
shell->GetDocument(getter_AddRefs(doc));
// Get the renderable form of the text
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb);
PrepareUnicodeText(tx,
ip, paintBuf, textLength, width);
ip[mContentLength] = ip[mContentLength-1]+1;
PRInt32 offset = mContentOffset + mContentLength;
PRInt32 index;
PRInt32 textWidth;
PRUnichar* text = paintBuf;
nsPoint origin;
//GetOrigin(origin);
nsIView * view;
GetView(&view);
GetOffsetFromView(origin, &view);
PRBool found = BinarySearchForPosition(aRendContext, text, origin.x, 0, 0,
PRInt32(textLength),
PRInt32(aEvent->point.x) , //go to local coordinates
index, textWidth);
if (found) {
PRInt32 charWidth;
aRendContext->GetWidth(text[index], charWidth);
charWidth /= 2;
if (PRInt32(aEvent->point.x) - origin.x > textWidth+charWidth) {
index++;
}
offset = 0;
PRInt32 j;
PRInt32* ptr = ip;
for (j=0;j<=PRInt32(mContentLength);j++) {
if (*ptr == index+mContentOffset) {
offset = j;//+mContentOffset;
break;
}
ptr++;
}
}
if (ip != indicies) {
delete [] ip;
}
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
aAcutalContentOffset = mContentOffset;//offset;//((TextFrame *)aNewFrame)->mContentOffset;
aOffset = index;
//reusing wordBufMem
PRInt32 i;
for (i = 0;i <= mContentLength; i ++){
if (ip[i] == aOffset + mContentOffset){ //reverse mapping
aOffset = i;
break;
}
}
NS_ASSERTION(i<= mContentLength, "offset we got from binary search is messed up");
return NS_OK;
}
NS_IMETHODIMP
TextFrame::SetSelected(PRBool aSelected, PRInt32 aBeginOffset, PRInt32 aEndOffset, PRBool aForceRedraw)
{
if (aSelected){
aEndOffset = PR_MIN(aEndOffset,mContentLength);
aBeginOffset = PR_MIN(aBeginOffset,mContentLength);
if (aEndOffset < 0)
aEndOffset = mContentLength;
if (aBeginOffset < 0)
aBeginOffset = mContentLength;
if (mSelectionOffset != aBeginOffset || mSelectionEnd != aEndOffset) {
mSelectionOffset = aBeginOffset;
mSelectionEnd = aEndOffset;
aForceRedraw = PR_TRUE;
}
}
return nsFrame::SetSelected(aSelected, aBeginOffset, aEndOffset, aForceRedraw);
}
NS_IMETHODIMP
TextFrame::SetSelectedContentOffsets(PRBool aSelected, PRInt32 aBeginContentOffset, PRInt32 aEndContentOffset,
PRInt32 aAnchorOffset, PRInt32 aFocusOffset, PRBool aForceRedraw,
nsIFocusTracker *aTracker,
nsIFrame **aActualSelected)
{
if (!aActualSelected)
return NS_ERROR_NULL_POINTER;
PRInt32 beginOffset(aBeginContentOffset);
if (aBeginContentOffset != -1){ //-1 signified the end of the current content
beginOffset = aBeginContentOffset - mContentOffset;
//haha you almost got me. the content offset does include the ws but no one can see it.
//here is where we aknowledge that it doesnt exist.
}
if (beginOffset >= mContentLength){
//this is not the droid we are looking for.
SetSelected(PR_FALSE, 0, 0, aForceRedraw);
nsIFrame *nextInFlow =GetNextInFlow();
if (nextInFlow)
return nextInFlow->SetSelectedContentOffsets(aSelected, aBeginContentOffset, aEndContentOffset,
aAnchorOffset, aFocusOffset, aForceRedraw, aTracker, aActualSelected);
else
return NS_ERROR_FAILURE;
}
if (beginOffset <0)
beginOffset = 0; //start from the beginning
else{
if (aAnchorOffset == aBeginContentOffset )
aTracker->SetFocus(nsnull, this);
if (aFocusOffset == aBeginContentOffset )
aTracker->SetFocus(this, nsnull);
}
*aActualSelected = this;
PRInt32 endOffset(aEndContentOffset);
if (endOffset != -1){ //-1 signified the end of the current content
endOffset = aEndContentOffset - mContentOffset;
}
nsIFrame *nextInFlow =GetNextInFlow();
if (nextInFlow){
if (endOffset == -1 || endOffset > mContentLength){ //-1 means until the end of the content
nextInFlow->SetSelectedContentOffsets(aSelected, aBeginContentOffset, aEndContentOffset,
aAnchorOffset, aFocusOffset,aForceRedraw, aTracker ,aActualSelected);
}
else if (aSelected == PR_TRUE) { //we must shut off all folowing selected frames if we are selecting frames
if (aAnchorOffset == aEndContentOffset )
aTracker->SetFocus(nsnull, this);
if (aFocusOffset == aEndContentOffset )
aTracker->SetFocus(this, nsnull);
do {
nextInFlow->SetSelected(PR_FALSE, 0, 0, aForceRedraw);
}
while (NS_SUCCEEDED(nextInFlow->GetNextInFlow(&nextInFlow)) && nextInFlow);//this is ok because frames arent reference counted this is not a leak!
}
}
else {
if (aAnchorOffset == aEndContentOffset )
aTracker->SetFocus(nsnull, this);
if (aFocusOffset == aEndContentOffset )
aTracker->SetFocus(this, nsnull);
}
return SetSelected(aSelected, beginOffset, endOffset, aForceRedraw);
}
NS_IMETHODIMP
TextFrame::GetSelected(PRBool *aSelected, PRInt32 *aBeginOffset, PRInt32 *aEndOffset, PRInt32 *aBeginContentOffset)
{
if (!aSelected || !aBeginOffset || !aEndOffset || !aBeginContentOffset)
return NS_ERROR_NULL_POINTER;
*aBeginOffset = mSelectionOffset;
*aEndOffset = mSelectionEnd;
*aSelected = mSelected;
*aBeginContentOffset = mContentOffset;
//should we check for whitespace here? dont think so.
return NS_OK;
}
NS_IMETHODIMP
TextFrame::GetPointFromOffset(nsIPresContext* inPresContext, nsIRenderingContext* inRendContext, PRInt32 inOffset, nsPoint* outPoint)
{
NS_PRECONDITION(inPresContext && inRendContext && outPoint, "Null ptr");
// Make enough space to transform
PRUnichar wordBufMem[WORD_BUF_SIZE];
PRUnichar paintBufMem[TEXT_BUF_SIZE];
PRUnichar* paintBuf = paintBufMem;
PRInt32 indicies[TEXT_BUF_SIZE];
PRInt32* ip = indicies;
if (mContentLength > TEXT_BUF_SIZE)
{
ip = new PRInt32[mContentLength+1];
paintBuf = new PRUnichar[mContentLength];
}
nscoord width = mRect.width;
PRInt32 textLength;
TextStyle ts(*inPresContext, *inRendContext, mStyleContext);
nsCOMPtr<nsIPresShell> shell;
inPresContext->GetShell(getter_AddRefs(shell));
nsCOMPtr<nsIDocument> doc;
shell->GetDocument(getter_AddRefs(doc));
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb);
PrepareUnicodeText(tx, ip, paintBuf, textLength, width);
PRUnichar* text = paintBuf;
nsPoint bottomLeft(0, 0);
nscoord textWidth;
PRUint32 measureLen = ip[inOffset - mContentOffset] - mContentOffset;
// do I need to do special stuff with small caps etc here?
inRendContext->GetWidth(text, measureLen, textWidth);
bottomLeft.x = textWidth;
*outPoint = bottomLeft;
// Cleanup
if (paintBuf != paintBufMem)
delete [] paintBuf;
if (ip != indicies)
delete [] ip;
return NS_OK;
}
NS_IMETHODIMP
TextFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset, PRInt32* outFrameContentOffset, nsIFrame **outChildFrame)
{
if (nsnull == outChildFrame)
return NS_ERROR_NULL_POINTER;
PRInt32 contentOffset = inContentOffset;
if (contentOffset != -1) //-1 signified the end of the current content
contentOffset = inContentOffset - mContentOffset;
if (contentOffset >= mContentLength)
{
//this is not the frame we are looking for.
nsIFrame *nextInFlow = GetNextInFlow();
if (nextInFlow)
return nextInFlow->GetChildFrameContainingOffset(inContentOffset, outFrameContentOffset, outChildFrame);
else
return NS_ERROR_FAILURE;
}
*outFrameContentOffset = contentOffset;
*outChildFrame = this;
return NS_OK;
}
NS_IMETHODIMP
TextFrame::PeekOffset(nsSelectionAmount aAmount, nsDirection aDirection, PRInt32 aStartOffset, nsIFrame **aResultFrame,
PRInt32 *aFrameOffset, PRInt32 *aContentOffset, PRBool aEatingWS)
{
//default, no matter what grab next/ previous sibling.
if (!aResultFrame || !aFrameOffset || !aContentOffset)
return NS_ERROR_NULL_POINTER;
if (aStartOffset < 0)
aStartOffset = mContentLength;
PRUnichar wordBufMem[WORD_BUF_SIZE];
PRUnichar paintBufMem[TEXT_BUF_SIZE];
PRInt32 indicies[TEXT_BUF_SIZE];
PRInt32* ip = indicies;
PRUnichar* paintBuf = paintBufMem;
if (mContentLength > TEXT_BUF_SIZE) {
ip = new PRInt32[mContentLength+1];
paintBuf = new PRUnichar[mContentLength];
}
nscoord width = mRect.width;
PRInt32 textLength;
// Transform text from content into renderable form
nsIDocument* doc;
mContent->GetDocument(doc);
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
NS_IF_RELEASE(doc);
nsTextTransformer tx(wordBufMem, WORD_BUF_SIZE,lb);
nsresult result(NS_OK);
switch (aAmount){
case eSelectNoAmount : {
*aResultFrame = this;
if (aStartOffset > mContentLength)
aStartOffset = mContentLength; //not ok normaly, but eNone means dont leave this frame
*aFrameOffset = aStartOffset;
}
break;
case eSelectCharacter : {
PrepareUnicodeText(tx, ip, paintBuf, textLength, width);
ip[mContentLength] = ip[mContentLength-1]+1; //must set up last one for selection beyond edge
nsIFrame *frameUsed = nsnull;
PRInt32 start;
PRBool found = PR_TRUE;
if (aDirection == eDirPrevious){
PRInt32 i;
for (i = aStartOffset -1; i >=0; i--){
if (ip[i] < ip[aStartOffset]){
*aFrameOffset = i;
break;
}
}
if (i <0){
found = PR_FALSE;
frameUsed = GetPrevInFlow();
start = -1;
}
}
else if (aDirection == eDirNext){
PRInt32 i;
for (i = aStartOffset +1; i <= mContentLength; i++){
if (ip[i] > ip[aStartOffset]){
*aFrameOffset = i;
break;
}
}
if (aStartOffset == 0 && (mFlags & TEXT_SKIP_LEADING_WS))
i--; //back up because we just skipped over some white space. why skip over the char also?
if (i > mContentLength){
found = PR_FALSE;
frameUsed = GetNextInFlow();
start = 0;
}
}
if (!found){
if (frameUsed){
result = frameUsed->PeekOffset(eSelectCharacter, aDirection, start, aResultFrame,
aFrameOffset, aContentOffset, aEatingWS);
}
else {//reached end ask the frame for help
result = nsFrame::PeekOffset(eSelectCharacter, aDirection, start, aResultFrame,
aFrameOffset, aContentOffset, aEatingWS);
}
}
else{
*aResultFrame = this;
*aContentOffset = mContentOffset;
}
}
break;
case eSelectWord : {
nsIFrame *frameUsed = nsnull;
PRBool keepSearching; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start;
PRBool found = PR_FALSE;
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
if (aDirection == eDirPrevious){
keepSearching = PR_TRUE;
tx.Init(this, mContentOffset + aStartOffset);
if (tx.GetPrevWord(PR_FALSE, wordLen, contentLen, isWhitespace)){
if ((aEatingWS && !isWhitespace) || !aEatingWS){
*aFrameOffset = aStartOffset - contentLen;
//check for whitespace next.
if (*aFrameOffset > 0)
keepSearching = PR_FALSE;//reached the beginning of a word
aEatingWS = !isWhitespace;//nowhite space, just eat chars.
while (isWhitespace && tx.GetPrevWord(PR_FALSE, wordLen, contentLen, isWhitespace)){
*aFrameOffset -= contentLen;
aEatingWS = PR_FALSE;
}
keepSearching = *aFrameOffset <= 0;
if (!isWhitespace){
if (!keepSearching)
found = PR_TRUE;
else
aEatingWS = PR_TRUE;
}
}
else {
*aFrameOffset = mContentLength;
found = PR_TRUE;
}
}
frameUsed = GetPrevInFlow();
start = -1; //start at end
}
else if (aDirection == eDirNext){
tx.Init(this, mContentOffset + aStartOffset );
if (tx.GetNextWord(PR_FALSE, wordLen, contentLen, isWhitespace)){
if ((aEatingWS && isWhitespace) || !aEatingWS){
*aFrameOffset = aStartOffset + contentLen;
//check for whitespace next.
keepSearching = PR_TRUE;
isWhitespace = PR_TRUE;
while (tx.GetNextWord(PR_FALSE, wordLen, contentLen, isWhitespace) && isWhitespace){
*aFrameOffset += contentLen;
keepSearching = PR_FALSE;
}
}
else if (aEatingWS)
*aFrameOffset = mContentOffset;
if (!isWhitespace){
found = PR_TRUE;
aEatingWS = PR_FALSE;
}
else if (!keepSearching) //we have found the "whole" word so just looking for WS
aEatingWS = PR_TRUE;
}
frameUsed = GetNextInFlow();
start = 0;
}
if (!found || (*aFrameOffset > mContentLength) || (*aFrameOffset < 0)){ //gone too far
if (frameUsed){
result = frameUsed->PeekOffset(aAmount, aDirection, start, aResultFrame,
aFrameOffset, aContentOffset, aEatingWS);
}
else {//reached end ask the frame for help
result = nsFrame::PeekOffset(aAmount, aDirection, start, aResultFrame,
aFrameOffset, aContentOffset, aEatingWS);
}
}
else {
*aContentOffset = mContentOffset;
*aResultFrame = this;
}
}
break;
case eSelectLine :
default: result = NS_ERROR_FAILURE; break;
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
if (ip != indicies) {
delete [] ip;
}
if (NS_FAILED(result)){
*aResultFrame = this;
*aContentOffset = mContentOffset;
if (aDirection == eDirNext){
*aFrameOffset = mContentLength;
}
else if (aDirection == eDirPrevious){
*aFrameOffset = 0;
}
result = NS_OK;
}
return result;
}
NS_IMETHODIMP
TextFrame::GetOffsets(PRInt32 &start, PRInt32 &end) const
{
start = mContentOffset;
end = mContentOffset+mContentLength;
return NS_OK;
}
NS_IMETHODIMP
TextFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// NS_PRECONDITION(nsnull != aReflowState.lineLayout, "no line layout");
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter TextFrame::Reflow: aMaxSize=%d,%d",
aReflowState.availableWidth, aReflowState.availableHeight));
// XXX If there's no line layout, we shouldn't even have created this
// frame. This may happen if, for example, this is text inside a table
// but not inside a cell. For now, just don't reflow.
if (nsnull == aReflowState.lineLayout) {
return NS_OK;
}
// Get starting offset into the content
PRInt32 startingOffset = 0;
if (nsnull != mPrevInFlow) {
TextFrame* prev = (TextFrame*) mPrevInFlow;
startingOffset = prev->mContentOffset + prev->mContentLength;
}
nsLineLayout& lineLayout = *aReflowState.lineLayout;
TextStyle ts(aPresContext, *aReflowState.rendContext, mStyleContext);
// Initialize mFlags (without destroying the TEXT_BLINK_ON bit) bits
// that are filled in by the reflow routines.
mFlags &= TEXT_BLINK_ON;
if (ts.mFont->mFont.decorations & NS_STYLE_TEXT_DECORATION_BLINK) {
if (0 == (mFlags & TEXT_BLINK_ON)) {
mFlags |= TEXT_BLINK_ON;
gTextBlinker->AddFrame(this);
}
}
else {
if (0 != (mFlags & TEXT_BLINK_ON)) {
mFlags &= ~TEXT_BLINK_ON;
gTextBlinker->RemoveFrame(this);
}
}
PRBool wrapping = NS_STYLE_WHITESPACE_NORMAL == ts.mText->mWhiteSpace;
PRBool firstLetterOK = lineLayout.GetFirstLetterStyleOK();
PRBool justDidFirstLetter = PR_FALSE;
// Set whitespace skip flag
PRBool skipWhitespace = PR_FALSE;
if (NS_STYLE_WHITESPACE_PRE != ts.mText->mWhiteSpace) {
if (lineLayout.GetEndsInWhiteSpace()) {
skipWhitespace = PR_TRUE;
}
}
nscoord x = 0;
nscoord maxWidth = aReflowState.availableWidth;
nscoord maxWordWidth = 0;
nscoord prevMaxWordWidth = 0;
PRBool endsInWhitespace = PR_FALSE;
PRBool endsInNewline = PR_FALSE;
nsCOMPtr<nsIPresShell> shell;
aPresContext.GetShell(getter_AddRefs(shell));
nsCOMPtr<nsIDocument> doc;
shell->GetDocument(getter_AddRefs(doc));
// Setup text transformer to transform this frames text content
PRUnichar wordBuf[WORD_BUF_SIZE];
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(wordBuf, WORD_BUF_SIZE,lb);
nsresult rv = tx.Init(/**textRun, XXX*/ this, startingOffset);
if (NS_OK != rv) {
return rv;
}
PRInt32 contentLength = tx.GetContentLength();
// Offset tracks how far along we are in the content
PRInt32 offset = startingOffset;
PRInt32 prevOffset = -1;
nscoord lastWordWidth = 0;
// Loop over words and whitespace in content and measure. Set inWord
// to true if we are part of a previous piece of text's word. This
// is only valid for one pass through the measuring loop.
PRBool inWord = lineLayout.InWord();
if (inWord) {
mFlags |= TEXT_IN_WORD;
}
PRInt32 column = lineLayout.GetColumn();
PRInt32 prevColumn = column;
mColumn = column;
PRBool breakable = 0 != lineLayout.GetPlacedFrames();
for (;;) {
// Get next word/whitespace from the text
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
PRUnichar* bp = tx.GetNextWord(inWord, wordLen, contentLen, isWhitespace);
if (nsnull == bp) {
break;
}
inWord = PR_FALSE;
// Measure the word/whitespace
nscoord width;
if (isWhitespace) {
if (0 == wordLen) {
// We hit a newline. Stop looping.
prevOffset = offset;
offset++;
endsInWhitespace = PR_TRUE;
endsInNewline = PR_TRUE;
break;
}
if (skipWhitespace) {
offset += contentLen;
skipWhitespace = PR_FALSE;
// Only set flag when we actually do skip whitespace
mFlags |= TEXT_SKIP_LEADING_WS;
continue;
}
if ('\t' == bp[0]) {
// Expand tabs to the proper width
wordLen = 8 - (7 & column);
width = ts.mSpaceWidth * wordLen;
}
else {
width = ts.mSpaceWidth + ts.mWordSpacing;/* XXX simplistic */
}
breakable = PR_TRUE;
firstLetterOK = PR_FALSE;
} else {
if (firstLetterOK) {
// XXX need a lookup function here; plus look ahead using the
// text-runs
if ((bp[0] == '\'') || (bp[0] == '\"')) {
wordLen = 2;
contentLen = 2;
}
else {
wordLen = 1;
contentLen = 1;
}
justDidFirstLetter = PR_TRUE;
}
if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, bp, wordLen, width);
}
else {
aReflowState.rendContext->GetWidth(bp, wordLen, width);
}
if (ts.mLetterSpacing) {
width += ts.mLetterSpacing * wordLen;
}
skipWhitespace = PR_FALSE;
lastWordWidth = width;
}
// See if there is room for the text
if ((0 != x) && wrapping && (x + width > maxWidth)) {
// The text will not fit.
break;
}
prevColumn = column;
column += wordLen;
x += width;
prevMaxWordWidth = maxWordWidth;
if (width > maxWordWidth) {
maxWordWidth = width;
}
endsInWhitespace = isWhitespace;
prevOffset = offset;
offset += contentLen;
if (!isWhitespace && justDidFirstLetter) {
// Time to stop
break;
}
}
if (tx.HasMultibyte()) {
mFlags |= TEXT_HAS_MULTIBYTE;
}
// Post processing logic to deal with word-breaking that spans
// multiple frames.
if (lineLayout.InWord()) {
// We are already in a word. This means a text frame prior to this
// one had a fragment of a nbword that is joined with this
// frame. It also means that the prior frame already found this
// frame and recorded it as part of the word.
#ifdef DEBUG_WORD_WRAPPING
ListTag(stdout);
printf(": in word; skipping\n");
#endif
lineLayout.ForgetWordFrame(this);
}
if (!lineLayout.InWord()) {
// There is no currently active word. This frame may contain the
// start of one.
if (endsInWhitespace) {
// Nope, this frame doesn't start a word.
lineLayout.ForgetWordFrames();
}
else if ((offset == contentLength) && (prevOffset >= 0)) {
// Force breakable to false when we aren't wrapping (this
// guarantees that the combined word will stay together)
if (!wrapping) {
breakable = PR_FALSE;
}
// This frame does start a word. However, there is no point
// messing around with it if we are already out of room. We
// always have room if we are not breakable.
if (!breakable || (x <= maxWidth)) {
// There is room for this word fragment. It's possible that
// this word fragment is the end of the text-run. If it's not
// then we continue with the look-ahead processing.
nsIFrame* next = lineLayout.FindNextText(this);
if (nsnull != next) {
#ifdef DEBUG_WORD_WRAPPING
nsAutoString tmp(tx.GetTextAt(0), offset-prevOffset);
ListTag(stdout);
printf(": start='");
fputs(tmp, stdout);
printf("' baseWidth=%d [%d,%d]\n", lastWordWidth, prevOffset, offset);
#endif
// Look ahead in the text-run and compute the final word
// width, taking into account any style changes and stopping
// at the first breakable point.
nscoord wordWidth = ComputeTotalWordWidth(lineLayout, aReflowState,
next, lastWordWidth);
if (!breakable || (x - lastWordWidth + wordWidth <= maxWidth)) {
// The fully joined word has fit. Account for the joined
// word's affect on the max-element-size here (since the
// joined word is large than it's pieces, the right effect
// will occur from the perspective of the container
// reflowing this frame)
if (wordWidth > maxWordWidth) {
maxWordWidth = wordWidth;
}
}
else {
// The fully joined word won't fit. We need to reduce our
// size by the lastWordWidth.
x -= lastWordWidth;
maxWordWidth = prevMaxWordWidth;
offset = prevOffset;
column = prevColumn;
#ifdef DEBUG_WORD_WRAPPING
printf(" x=%d maxWordWidth=%d len=%d\n", x, maxWordWidth,
offset - startingOffset);
#endif
lineLayout.ForgetWordFrames();
}
}
}
}
}
lineLayout.SetColumn(column);
// Inform line layout of how this piece of text ends in whitespace
// (only text objects do this). Note that if x is zero then this
// text object collapsed into nothingness which means it shouldn't
// effect the current setting of the ends-in-whitespace flag.
lineLayout.SetUnderstandsWhiteSpace(PR_TRUE);
if (0 != x) {
lineLayout.SetEndsInWhiteSpace(endsInWhitespace);
}
if (justDidFirstLetter) {
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
}
// Setup metrics for caller; store final max-element-size information
aMetrics.width = x;
mComputedWidth = x;
if ((0 == x) && (NS_STYLE_WHITESPACE_PRE != ts.mText->mWhiteSpace)) {
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
}
else {
ts.mNormalFont->GetHeight(aMetrics.height);
ts.mNormalFont->GetMaxAscent(aMetrics.ascent);
ts.mNormalFont->GetMaxDescent(aMetrics.descent);
}
if (!wrapping) {
maxWordWidth = x;
}
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = maxWordWidth;
aMetrics.maxElementSize->height = aMetrics.height;
}
// Set content offset and length
mContentOffset = startingOffset;
mContentLength = offset - startingOffset;
//go to selection and ask if we are selected here. and where!!
nsReflowStatus rs = (offset == contentLength)
? NS_FRAME_COMPLETE
: NS_FRAME_NOT_COMPLETE;
if (endsInNewline) {
rs = NS_INLINE_LINE_BREAK_AFTER(rs);
}
else if ((offset != contentLength) && (offset == startingOffset)) {
// Break-before a long-word that doesn't fit here
rs = NS_INLINE_LINE_BREAK_BEFORE();
}
aStatus = rs;
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit TextFrame::Reflow: status=%x width=%d",
aStatus, aMetrics.width));
return NS_OK;
}
NS_IMETHODIMP
TextFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
{
// Get the text fragments that make up our content
const nsTextFragment* frag;
PRInt32 numFrags;
nsITextContent* tc;
if (NS_OK == mContent->QueryInterface(kITextContentIID, (void**) &tc)) {
tc->GetText(frag, numFrags);
NS_RELEASE(tc);
// Find fragment that contains the end of the mapped content
PRInt32 endIndex = mContentOffset + mContentLength;
PRInt32 offset = 0;
const nsTextFragment* lastFrag = frag + numFrags;
while (frag < lastFrag) {
PRInt32 fragLen = frag->GetLength();
if (endIndex <= offset + fragLen) {
offset = mContentOffset - offset;
if (frag->Is2b()) {
const PRUnichar* cp = frag->Get2b() + offset;
const PRUnichar* end = cp + mContentLength;
while (cp < end) {
PRUnichar ch = *cp++;
if (XP_IS_SPACE(ch)) {
aUsedSpace = aExtraSpace;
mRect.width += aExtraSpace;
return NS_OK;
}
}
}
else {
const unsigned char* cp =
((const unsigned char*)frag->Get1b()) + offset;
const unsigned char* end = cp + mContentLength;
while (cp < end) {
PRUnichar ch = PRUnichar(*cp++);
if (XP_IS_SPACE(ch)) {
aUsedSpace = aExtraSpace;
mRect.width += aExtraSpace;
return NS_OK;
}
}
}
break;
}
offset += fragLen;
frag++;
}
}
aUsedSpace = 0;
return NS_OK;
}
NS_IMETHODIMP
TextFrame::TrimTrailingWhiteSpace(nsIPresContext& aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth)
{
nscoord dw = 0;
const nsStyleText* textStyle = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
if (NS_STYLE_WHITESPACE_PRE != textStyle->mWhiteSpace) {
// Get font metrics for a space so we can adjust the width by the
// right amount.
const nsStyleFont* fontStyle = (const nsStyleFont*)
mStyleContext->GetStyleData(eStyleStruct_Font);
nscoord spaceWidth;
aRC.SetFont(fontStyle->mFont);
aRC.GetWidth(' ', spaceWidth);
// Get the text fragments that make up our content
const nsTextFragment* frag;
PRInt32 numFrags;
nsITextContent* tc;
if (NS_OK == mContent->QueryInterface(kITextContentIID, (void**) &tc)) {
tc->GetText(frag, numFrags);
NS_RELEASE(tc);
// Find fragment that contains the end of the mapped content
PRInt32 endIndex = mContentOffset + mContentLength;
PRInt32 offset = 0;
const nsTextFragment* lastFrag = frag + numFrags;
while (frag < lastFrag) {
PRInt32 fragLen = frag->GetLength();
if (endIndex <= offset + fragLen) {
// Look inside the fragments last few characters and see if they
// are whitespace. If so, count how much width was supplied by
// them.
offset = mContentOffset - offset;
if (frag->Is2b()) {
// XXX If by chance the last content fragment is *all*
// whitespace then this won't back up far enough.
const PRUnichar* cp = frag->Get2b() + offset;
const PRUnichar* end = cp + mContentLength;
if (--end >= cp) {
PRUnichar ch = *end;
if (XP_IS_SPACE(ch)) {
dw = spaceWidth;
}
}
}
else {
const unsigned char* cp =
((const unsigned char*)frag->Get1b()) + offset;
const unsigned char* end = cp + mContentLength;
if (--end >= cp) {
PRUnichar ch = PRUnichar(*end);
if (XP_IS_SPACE(ch)) {
dw = spaceWidth;
}
}
}
break;
}
offset += fragLen;
frag++;
}
}
if (mRect.width > dw) {
mRect.width -= dw;
}
else {
dw = mRect.width;
mRect.width = 0;
}
mComputedWidth -= dw;
}
if (0 != dw) {
mFlags |= TEXT_TRIMMED_WS;
}
else {
mFlags &= ~TEXT_TRIMMED_WS;
}
aDeltaWidth = dw;
return NS_OK;
}
nscoord
TextFrame::ComputeTotalWordWidth(nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nscoord aBaseWidth)
{
nscoord addedWidth = 0;
while (nsnull != aNextFrame) {
nsIFrame* frame = aNextFrame;
while (nsnull != frame) {
nsIContent* content = nsnull;
if ((NS_OK == frame->GetContent(&content)) && (nsnull != content)) {
#ifdef DEBUG_WORD_WRAPPING
printf(" next textRun=");
nsAutoString tmp;
frame->GetFrameName(tmp);
fputs(tmp, stdout);
printf("\n");
#endif
nsITextContent* tc;
if (NS_OK == content->QueryInterface(kITextContentIID, (void**)&tc)) {
PRBool stop;
nscoord moreWidth = ComputeWordFragmentWidth(aLineLayout,
aReflowState,
frame, tc,
stop);
NS_RELEASE(tc);
NS_RELEASE(content);
addedWidth += moreWidth;
#ifdef DEBUG_WORD_WRAPPING
printf(" moreWidth=%d (addedWidth=%d) stop=%c\n", moreWidth,
addedWidth, stop?'T':'F');
#endif
if (stop) {
goto done;
}
}
else {
// It claimed it was text but it doesn't implement the
// nsITextContent API. Therefore I don't know what to do with it
// and can't look inside it. Oh well.
NS_RELEASE(content);
goto done;
}
}
// XXX This assumes that a next-in-flow will follow it's
// prev-in-flow in the text-run. Maybe not a good assumption?
// What if the next-in-flow isn't actually part of the flow?
frame->GetNextInFlow(&frame);
}
// Move on to the next frame in the text-run
aNextFrame = aLineLayout.FindNextText(aNextFrame);
}
done:;
#ifdef DEBUG_WORD_WRAPPING
printf(" total word width=%d\n", aBaseWidth + addedWidth);
#endif
return aBaseWidth + addedWidth;
}
nscoord
TextFrame::ComputeWordFragmentWidth(nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aTextFrame,
nsITextContent* aText,
PRBool& aStop)
{
PRUnichar buf[TEXT_BUF_SIZE];
nsIDocument* doc;
mContent->GetDocument(doc);
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
NS_IF_RELEASE(doc);
nsTextTransformer tx(buf, TEXT_BUF_SIZE,lb);
// XXX we need the content-offset of the text frame!!! 0 won't
// always be right when continuations are in action
tx.Init(/**textRun, XXX*/ aTextFrame, 0);
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
PRUnichar* bp = tx.GetNextWord(PR_TRUE, wordLen, contentLen, isWhitespace);
if ((nsnull == bp) || isWhitespace) {
// Don't bother measuring nothing
aStop = PR_TRUE;
return 0;
}
aStop = contentLen < tx.GetContentLength();
nsIStyleContext* sc;
if ((NS_OK == aTextFrame->GetStyleContext(&sc)) &&
(nsnull != sc)) {
// Measure the piece of text. Note that we have to select the
// appropriate font into the text first because the rendering
// context has our font in it, not the font that aText is using.
nscoord width;
nsIRenderingContext& rc = *aReflowState.rendContext;
nsIFontMetrics* oldfm;
rc.GetFontMetrics(oldfm);
TextStyle ts(aLineLayout.mPresContext, rc, sc);
if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, buf, wordLen, width);
}
else {
rc.GetWidth(buf, wordLen, width);
}
rc.SetFont(oldfm);
NS_IF_RELEASE(oldfm);
NS_RELEASE(sc);
#ifdef DEBUG_WORD_WRAPPING
nsAutoString tmp(bp, wordLen);
printf(" fragment='");
fputs(tmp, stdout);
printf("' width=%d [wordLen=%d contentLen=%d ContentLength=%d]\n",
width, wordLen, contentLen, tx.GetContentLength());
#endif
// Remember the text frame for later so that we don't bother doing
// the word look ahead.
aLineLayout.RecordWordFrame(aTextFrame);
return width;
}
aStop = PR_TRUE;
return 0;
}
// Translate the mapped content into a string that's printable
void
TextFrame::ToCString(nsString& aBuf, PRInt32& aContentLength) const
{
const nsTextFragment* frag;
PRInt32 numFrags;
// Get the frames text content
nsITextContent* tc;
if (NS_OK != mContent->QueryInterface(kITextContentIID, (void**) &tc)) {
return;
}
tc->GetText(frag, numFrags);
NS_RELEASE(tc);
// Compute the total length of the text content.
PRInt32 sum = 0;
PRInt32 i, n = numFrags;
for (i = 0; i < n; i++) {
sum += frag[i].GetLength();
}
aContentLength = sum;
// Set current fragment and current fragment offset
PRInt32 fragOffset = 0, offset = 0;
n = numFrags;
while (--n >= 0) {
if (mContentOffset < offset + frag->GetLength()) {
fragOffset = mContentOffset - offset;
break;
}
offset += frag->GetLength();
frag++;
}
if (0 == mContentLength) {
return;
}
n = mContentLength;
for (;;) {
PRUnichar ch = frag->CharAt(fragOffset);
if (ch == '\r') {
aBuf.Append("\\r");
} else if (ch == '\n') {
aBuf.Append("\\n");
} else if (ch == '\t') {
aBuf.Append("\\t");
} else if ((ch < ' ') || (ch >= 127)) {
aBuf.Append("\\0");
aBuf.Append((PRInt32)ch, 8);
} else {
aBuf.Append(ch);
}
if (--n == 0) {
break;
}
if (++fragOffset == frag->GetLength()) {
frag++;
fragOffset = 0;
}
}
}
NS_IMETHODIMP
TextFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::textFrame;
NS_ADDREF(*aType);
return NS_OK;
}
NS_IMETHODIMP
TextFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Text", aResult);
}
NS_IMETHODIMP
TextFrame::List(FILE* out, PRInt32 aIndent) const
{
// Output the tag
IndentBy(out, aIndent);
ListTag(out);
nsIView* view;
GetView(&view);
if (nsnull != view) {
fprintf(out, " [view=%p]", view);
}
PRInt32 contentLength;
nsAutoString tmp;
ToCString(tmp, contentLength);
// Output the first/last content offset and prev/next in flow info
PRBool isComplete = (mContentOffset + mContentLength) == contentLength;
fprintf(out, "[%d,%d,%c] ",
mContentOffset, mContentOffset+mContentLength-1,
isComplete ? 'T':'F');
if (nsnull != mPrevInFlow) {
fprintf(out, "prev-in-flow=%p ", mPrevInFlow);
}
if (nsnull != mNextInFlow) {
fprintf(out, "next-in-flow=%p ", mNextInFlow);
}
// Output the rect and state
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
fprintf(out, " [state=%08x]", mState);
}
// Output the text
fputs("<\n", out);
aIndent++;
IndentBy(out, aIndent);
fputs("\"", out);
fputs(tmp, out);
fputs("\"\n", out);
aIndent--;
IndentBy(out, aIndent);
fputs(">\n", out);
return NS_OK;
}
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