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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 "nsIContent.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 "nsICaret.h"
#include "nsXIFConverter.h"
#include "nsHTMLAtoms.h"
#include "nsILineBreaker.h"
#include "nsIWordBreaker.h"
#include "nsITextContent.h"
#include "nsTextRun.h"
#include "nsTextFragment.h"
#include "nsTextTransformer.h"
#include "nsLayoutAtoms.h"
#include "nsIFrameSelection.h"
#include "nsIDOMSelection.h"
#include "nsIDOMRange.h"
#include "nsILineIterator.h"
//tripple click includes
#include "nsIPref.h"
#include "nsIServiceManager.h"
#ifndef PR_ABS
#define PR_ABS(x) (x < 0 ? -x : x)
#endif
static NS_DEFINE_IID(kIDOMTextIID, NS_IDOMTEXT_IID);
static NS_DEFINE_CID(kPrefCID, NS_PREF_CID);//for tripple click pref
#ifdef NS_DEBUG
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#undef NOISY_REFLOW
#undef NOISY_TRIM
#else
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#undef NOISY_REFLOW
#undef NOISY_TRIM
#endif
// #define DEBUGWORDJUMP
//----------------------------------------------------------------------
#define TEXT_BUF_SIZE 100
//----------------------------------------
struct nsAutoIndexBuffer {
nsAutoIndexBuffer();
~nsAutoIndexBuffer();
nsresult GrowTo(PRInt32 aAtLeast);
PRInt32* mBuffer;
PRInt32 mBufferLen;
PRInt32 mAutoBuffer[TEXT_BUF_SIZE];
};
nsAutoIndexBuffer::nsAutoIndexBuffer()
: mBuffer(mAutoBuffer),
mBufferLen(TEXT_BUF_SIZE)
{
}
nsAutoIndexBuffer::~nsAutoIndexBuffer()
{
if (mBuffer && (mBuffer != mAutoBuffer)) {
delete [] mBuffer;
}
}
nsresult
nsAutoIndexBuffer::GrowTo(PRInt32 aAtLeast)
{
PRInt32 newSize = mBufferLen * 2;
if (newSize < mBufferLen + aAtLeast) {
newSize = mBufferLen * 2 + aAtLeast;
}
PRInt32* newBuffer = new PRInt32[newSize];
if (!newBuffer) {
return NS_ERROR_OUT_OF_MEMORY;
}
nsCRT::memcpy(newBuffer, mBuffer, sizeof(PRInt32) * mBufferLen);
if (mBuffer != mAutoBuffer) {
delete [] mBuffer;
}
mBuffer = newBuffer;
mBufferLen = newSize;
return NS_OK;
}
//----------------------------------------------------------------------
// Helper class for managing blinking text
class nsBlinkTimer : public nsITimerCallback {
public:
nsBlinkTimer();
virtual ~nsBlinkTimer();
NS_DECL_ISUPPORTS
void AddFrame(nsIFrame* aFrame);
PRBool RemoveFrame(nsIFrame* aFrame);
PRInt32 FrameCount();
void Start();
void Stop();
virtual void Notify(nsITimer *timer);
nsITimer* mTimer;
nsVoidArray mFrames;
};
static PRBool gBlinkTextOff;
static nsBlinkTimer* gTextBlinker;
#ifdef NOISY_BLINK
static PRTime gLastTick;
#endif
nsBlinkTimer::nsBlinkTimer()
{
NS_INIT_REFCNT();
mTimer = nsnull;
}
nsBlinkTimer::~nsBlinkTimer()
{
Stop();
}
void nsBlinkTimer::Start()
{
nsresult rv = NS_NewTimer(&mTimer);
if (NS_OK == rv) {
mTimer->Init(this, 750);
}
}
void nsBlinkTimer::Stop()
{
if (nsnull != mTimer) {
mTimer->Cancel();
NS_RELEASE(mTimer);
}
}
static NS_DEFINE_IID(kITimerCallbackIID, NS_ITIMERCALLBACK_IID);
NS_IMPL_ISUPPORTS(nsBlinkTimer, kITimerCallbackIID);
void nsBlinkTimer::AddFrame(nsIFrame* aFrame) {
mFrames.AppendElement(aFrame);
if (1 == mFrames.Count()) {
Start();
}
}
PRBool nsBlinkTimer::RemoveFrame(nsIFrame* aFrame) {
PRBool rv = mFrames.RemoveElement(aFrame);
if (0 == mFrames.Count()) {
Stop();
}
return rv;
}
PRInt32 nsBlinkTimer::FrameCount() {
return mFrames.Count();
}
void nsBlinkTimer::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++) {
nsIFrame* text = (nsIFrame*) 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);
}
}
//----------------------------------------------------------------------
class nsTextFrame : public nsSplittableFrame {
public:
nsTextFrame();
// 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;
#ifdef DEBUG
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
NS_IMETHOD GetPosition(nsIPresContext& aCX,
nscoord aXCoord,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd);
NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext& aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
NS_IMETHOD GetPositionSlowly(nsIPresContext& aCX,
nsIRenderingContext * aRendContext,
nscoord aXCoord,
nsIContent ** aNewContent,
PRInt32& aOffset);
NS_IMETHOD SetSelected(nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread);
NS_IMETHOD PeekOffset(nsPeekOffsetStruct *aPos);
NS_IMETHOD HandleMultiplePress(nsIPresContext& aPresContext,
nsGUIEvent * aEvent,
nsEventStatus& aEventStatus);
NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const;
NS_IMETHOD GetPointFromOffset(nsIPresContext* inPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint);
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
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);
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;
PRBool mPreformatted;
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);
// Cache the original decorations and reuse the current font
// to query metrics, rather than creating a new font which is expensive.
nsFont* plainFont = (nsFont *)&mFont->mFont; //XXX: Change to use a CONST_CAST macro.
PRUint8 originalDecorations = plainFont->decorations;
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) {
nscoord originalSize = plainFont->size;
plainFont->size = nscoord(0.7 * plainFont->size);
aPresContext->GetMetricsFor(*plainFont, &mSmallFont);
// Reset to the size value saved earlier.
plainFont->size = originalSize;
}
else {
mSmallFont = nsnull;
}
// Reset to the decoration saved earlier
plainFont->decorations = originalDecorations;
// 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;
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;
mPreformatted = (NS_STYLE_WHITESPACE_PRE == mText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == mText->mWhiteSpace);
}
~TextStyle() {
NS_RELEASE(mNormalFont);
NS_IF_RELEASE(mSmallFont);
}
};
nsIDocument* GetDocument(nsIPresContext* aPresContext);
PRIntn PrepareUnicodeText(nsTextTransformer& aTransformer,
nsAutoIndexBuffer* aIndexBuffer,
nsAutoTextBuffer* aTextBuffer,
PRInt32* aTextLen);
void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aStyle,
nscoord aX, nscoord aY, nscoord aWidth,
PRUnichar* aText = nsnull,
SelectionDetails *aDetails = nsnull,
PRUint32 aIndex = 0,
PRUint32 aLength = 0,
const nscoord* aSpacing = nsnull);
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,
SelectionDetails *aDetails = nsnull);
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(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nscoord aBaseWidth,
const PRUnichar* aWordBuf,
PRUint32 aWordBufLen,
PRUint32 aWordBufSize);
nscoord ComputeWordFragmentWidth(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nsIContent* aContent,
nsITextContent* aText,
PRBool* aStop,
const PRUnichar* aWordBuf,
PRUint32 &aWordBufLen,
PRUint32 aWordBufSize);
void ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const;
protected:
virtual ~nsTextFrame();
PRInt32 mContentOffset;
PRInt32 mContentLength;
PRInt32 mColumn;
};
// Flag information used by rendering code. This information is
// computed by the ResizeReflow code. The flags are stored in the
// mState variable in the frame class private section.
// Flag indicating that whitespace was skipped
#define TEXT_SKIP_LEADING_WS 0x01000000
#define TEXT_HAS_MULTIBYTE 0x02000000
#define TEXT_IN_WORD 0x04000000
// This bit is set on the first frame in a continuation indicating
// that it was chopped short because of :first-letter style.
#define TEXT_FIRST_LETTER 0x08000000
// Bits in mState used for reflow flags
#define TEXT_REFLOW_FLAGS 0x0F000000
#define TEXT_TRIMMED_WS 0x20000000
#define TEXT_OPTIMIZE_RESIZE 0x40000000
#define TEXT_BLINK_ON 0x80000000
//----------------------------------------------------------------------
nsresult
NS_NewTextFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsTextFrame* it = new nsTextFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsTextFrame::nsTextFrame()
: nsSplittableFrame()
{
if (nsnull == gTextBlinker) {
// Create text timer the first time out
gTextBlinker = new nsBlinkTimer();
}
NS_ADDREF(gTextBlinker);
}
nsTextFrame::~nsTextFrame()
{
if (0 != (mState & 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;
}
}
nsIDocument*
nsTextFrame::GetDocument(nsIPresContext* aPresContext)
{
nsIDocument* result = nsnull;
if (mContent) {
mContent->GetDocument(result);
}
if (!result && aPresContext) {
nsIPresShell* shell;
aPresContext->GetShell(&shell);
if (shell) {
shell->GetDocument(&result);
NS_RELEASE(shell);
}
}
return result;
}
NS_IMETHODIMP
nsTextFrame::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
nsTextFrame::ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent)
{
nsIFrame* targetTextFrame = this;
PRBool markAllDirty = PR_TRUE;
if (aSubContent) {
nsCOMPtr<nsITextContentChangeData> tccd = do_QueryInterface(aSubContent);
if (tccd) {
nsITextContentChangeData::ChangeType type;
tccd->GetChangeType(&type);
if (nsITextContentChangeData::Append == type) {
markAllDirty = PR_FALSE;
nsTextFrame* frame = (nsTextFrame*) GetLastInFlow();
frame->mState |= NS_FRAME_IS_DIRTY;
targetTextFrame = frame;
}
}
}
if (markAllDirty) {
// Mark this frame and all the next-in-flow frames as dirty
nsTextFrame* textFrame = this;
while (textFrame) {
textFrame->mState |= NS_FRAME_IS_DIRTY;
textFrame = (nsTextFrame*)textFrame->mNextInFlow;
}
}
// Generate a reflow command with this frame as the target frame
nsIReflowCommand* cmd;
nsresult rv;
rv = NS_NewHTMLReflowCommand(&cmd, targetTextFrame,
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
nsTextFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
if (NS_FRAME_PAINT_LAYER_FOREGROUND != aWhichLayer) {
return NS_OK;
}
if ((0 != (mState & 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)) {
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 & mState) ||
(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
nsTextFrame::PrepareUnicodeText(nsTextTransformer& aTX,
nsAutoIndexBuffer* aIndexBuffer,
nsAutoTextBuffer* aTextBuffer,
PRInt32* aTextLen)
{
PRIntn numSpaces = 0;
// Setup transform to operate starting in the content at our content
// offset
aTX.Init(this, mContent, mContentOffset);
PRInt32 strInx = mContentOffset;
PRInt32* indexp = aIndexBuffer ? aIndexBuffer->mBuffer : nsnull;
// Skip over the leading whitespace
PRInt32 n = mContentLength;
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
aTX.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace);
NS_ASSERTION(isWhitespace, "mState and content are out of sync");
if (isWhitespace) {
if (nsnull != indexp) {
// 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) {
*indexp++ = 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 & mState) ? PR_TRUE : PR_FALSE;
PRInt32 column = mColumn;
PRInt32 textLength = 0;
PRInt32 dstOffset = 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 != indexp) {
*indexp++ = strInx;
strInx += wordLen;
}
}
else if ('\n' == bp[0]) {
if (nsnull != indexp) {
*indexp++ = strInx;
}
break;
}
else if (nsnull != indexp) {
if (1 == wordLen) {
// 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) {
*indexp++ = strInx;
}
strInx++;
} else {
// Point mapping indicies at each content index in the word
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx++;
}
}
}
}
else {
if (nsnull != indexp) {
// Point mapping indicies at each content index in the word
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx++;
}
}
}
// Grow the buffer before we run out of room. The only time this
// happens is because of tab expansion.
if (dstOffset + wordLen > aTextBuffer->mBufferLen) {
nsresult rv = aTextBuffer->GrowBy(wordLen);
if (NS_FAILED(rv)) {
break;
}
}
column += wordLen;
textLength += wordLen;
n -= contentLen;
nsCRT::memcpy(aTextBuffer->mBuffer + dstOffset, bp,
sizeof(PRUnichar)*wordLen);
dstOffset += wordLen;
}
#ifdef DEBUG
if (aIndexBuffer) {
NS_ASSERTION(indexp <= aIndexBuffer->mBuffer + aIndexBuffer->mBufferLen,
"yikes - we just overwrote memory");
}
NS_ASSERTION(dstOffset <= aTextBuffer->mBufferLen,
"yikes - we just overwrote memory");
#endif
// Remove trailing whitespace if it was trimmed after reflow
if (TEXT_TRIMMED_WS & mState) {
if (--dstOffset >= 0) {
PRUnichar ch = aTextBuffer->mBuffer[dstOffset];
if (XP_IS_SPACE(ch)) {
textLength--;
}
}
numSpaces--;
}
if (aIndexBuffer) {
PRInt32* ip = aIndexBuffer->mBuffer;
ip[mContentLength] = ip[mContentLength-1];
if ((ip[mContentLength] - mContentOffset) < textLength) {
// Must set up last one for selection beyond edge if in boundary
ip[mContentLength]++;
}
}
*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
nsTextFrame::PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord aX, nscoord aY, nscoord aWidth,
PRUnichar *aText, /*=nsnull*/
SelectionDetails *aDetails,/*= nsnull*/
PRUint32 aIndex, /*= 0*/
PRUint32 aLength, /*= 0*/
const nscoord* aSpacing /* = nsnull*/ )
{
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);
}
if (aDetails){
nsRect rect;
GetRect(rect);
PRInt32 startOffset = 0;
PRInt32 textWidth = 0;
while(aDetails){
PRInt32 start = PR_MAX(0,(aDetails->mStart - (PRInt32)aIndex));
PRInt32 end = PR_MIN((PRInt32)aLength,(aDetails->mEnd - (PRInt32)aIndex));
PRInt32 i;
if (start < end && (aLength - start) > 0)
{
//aDetails allready processed to have offsets from frame start not content offsets
if (start < end){
if (aLength == 1)
textWidth = aWidth;
else {
if (aDetails->mStart > 0){
if (aSpacing)
{
for (i = 0; i < start;i ++){
startOffset += *aSpacing ++;
}
}
else
aRenderingContext.GetWidth(aText, start, startOffset);
}
if (aSpacing){
for (i = start; i < end;i ++){
textWidth += *aSpacing ++;
}
}
else
aRenderingContext.GetWidth(aText + start,
PRUint32(end - start), textWidth);
}
switch (aDetails->mType)
{
case SELECTION_NORMAL:{
//
// XOR InvertRect is currently implemented only in the unix and windows
// rendering contexts. When other platforms implement InvertRect(), they
// can be added here. Eventually this #ifdef should die.
//
// For platforms that dont implement InvertRect(), the selection will be
// a non-filled rectangle.
#if defined(XP_PC) || defined(XP_UNIX) || defined(XP_MAC)
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(0,0,0));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
}break;
case SELECTION_SPELLCHECK:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}break;
case SELECTION_IME_SOLID:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(NS_RGB(0,0,255));
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}break;
case SELECTION_IME_DASHED:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(NS_RGB(128,0,255));
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}break;
default:
NS_ASSERTION(0,"what type of selection do i not know about?");
break;
}
}
}
aDetails = aDetails->mNext;
}
}
}
void
nsTextFrame::PaintUnicodeText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (displaySelection) {
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
}
nscoord width = mRect.width;
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
PRInt32 textLength;
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
nsFrameState frameState;
PRBool isSelected;
GetFrameState(&frameState);
isSelected = (frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
if (0 != textLength) {
if (!displaySelection || !isSelected ) {
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
dx, dy, width);
}
else {
SelectionDetails *details = nsnull;
nsCOMPtr<nsIPresShell> shell;
nsCOMPtr<nsIFrameSelection> frameSelection;
nsresult rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell){
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
if (NS_SUCCEEDED(rv) && frameSelection){
nsCOMPtr<nsIContent> content;
rv = GetContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv) && content){
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details);// last param notused
}
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext,
aTextStyle, dx, dy, width, text, details,0,(PRUint32)textLength);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
}
}
//measure Spaced Textvoid
nsresult
nsTextFrame::GetPositionSlowly(nsIPresContext& aPresContext,
nsIRenderingContext* aRendContext,
nscoord aXCoord,
nsIContent** aNewContent,
PRInt32& aOffset)
{
if (!aRendContext || !aNewContent) {
return NS_ERROR_NULL_POINTER;
}
TextStyle ts(&aPresContext, *aRendContext, mStyleContext);
if (!ts.mSmallCaps && !ts.mWordSpacing && !ts.mLetterSpacing) {
return NS_ERROR_INVALID_ARG;
}
nsIView * view;
nsPoint origin;
GetView(&view);
GetOffsetFromView(origin, &view);
if (aXCoord - origin.x <0)
{
*aNewContent = mContent;
aOffset =0;
}
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(&aPresContext)));
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
PRInt32 textLength;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength <= 0) {
return NS_ERROR_FAILURE;
}
PRInt32 actualLength = textLength;
nscoord charWidth,widthsofar = 0;
PRInt32 indx = 0;
PRBool found = PR_FALSE;
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* paintBuf = paintBuffer.mBuffer;
PRUnichar* startBuf = paintBuf;
nsIFontMetrics* lastFont = ts.mLastFont;
for (; --textLength >= 0; paintBuf++,indx++) {
nsIFontMetrics* nextFont;
nscoord glyphWidth;
PRUnichar ch = *paintBuf;
if (ts.mSmallCaps && nsCRT::IsLower(ch)) {
nextFont = ts.mSmallFont;
ch = nsCRT::ToUpper(ch);
if (lastFont != ts.mSmallFont) {
aRendContext->SetFont(ts.mSmallFont);
aRendContext->GetWidth(ch, charWidth);
aRendContext->SetFont(ts.mNormalFont);
}
else {
aRendContext->GetWidth(ch, charWidth);
}
glyphWidth = charWidth + ts.mLetterSpacing;
}
else if (ch == ' ') {
nextFont = lastFont;
glyphWidth = ts.mSpaceWidth + ts.mWordSpacing;
nscoord extra = ts.mExtraSpacePerSpace;
if (--ts.mNumSpaces == 0) {
extra += ts.mRemainingExtraSpace;
}
glyphWidth += extra;
}
else {
nextFont = lastFont;
aRendContext->GetWidth(ch, charWidth);
glyphWidth = charWidth + ts.mLetterSpacing;
}
if ((aXCoord - origin.x) >= widthsofar && (aXCoord - origin.x) <= (widthsofar + glyphWidth)){
if ( ((aXCoord - origin.x) - widthsofar) <= (glyphWidth /2)){
aOffset = indx;
found = PR_TRUE;
break;
}
else{
aOffset = indx+1;
found = PR_TRUE;
break;
}
}
if (nextFont != lastFont)
lastFont = nextFont;
widthsofar += glyphWidth;
}
paintBuf = startBuf;
if (!found){
aOffset = textLength;
if (aOffset <0)
aOffset = actualLength;//max length before textlength was reduced
}
aOffset += mContentOffset;//offset;//((nsTextFrame *)aNewFrame)->mContentOffset;
PRInt32 i;
for (i = 0;i <= mContentLength; i ++){
if (ip[i] == aOffset){ //reverse mapping
aOffset = i + mContentOffset;
break;
}
}
*aNewContent = mContent;
if (*aNewContent)
(*aNewContent)->AddRef();
return NS_OK;
}
void
nsTextFrame::RenderString(nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord aX, nscoord aY,
nscoord aWidth,
SelectionDetails *aDetails /*=nsnull*/)
{
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);
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;
PRInt32 countSoFar = 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.SetColor(aTextStyle.mColor->mColor);
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, runStart, aDetails,countSoFar,pendingCount, spacing ? sp0 : nsnull);
countSoFar += pendingCount;
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.SetColor(aTextStyle.mColor->mColor);
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, runStart, aDetails,countSoFar,pendingCount,
spacing ? sp0 : nsnull);
}
aTextStyle.mLastFont = lastFont;
if (bp0 != buf) {
delete [] bp0;
}
if (sp0 != spacingMem) {
delete [] sp0;
}
}
inline void
nsTextFrame::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
nsTextFrame::GetWidth(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
nscoord* aWidthResult)
{
nsAutoTextBuffer widthBuffer;
if (NS_FAILED(widthBuffer.GrowTo(aLength))) {
*aWidthResult = 0;
return;
}
PRUnichar* bp = widthBuffer.mBuffer;
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
nscoord sum = 0;
nscoord charWidth;
while (--aLength >= 0) {
nscoord glyphWidth;
PRUnichar ch = *aBuffer++;
if (aTextStyle.mSmallCaps && nsCRT::IsLower(ch)) {
ch = nsCRT::ToUpper(ch);
if (lastFont != aTextStyle.mSmallFont) {
lastFont = aTextStyle.mSmallFont;
aRenderingContext.SetFont(lastFont);
}
aRenderingContext.GetWidth(ch, charWidth);
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
}
else if (ch == ' ') {
glyphWidth = aTextStyle.mSpaceWidth + aTextStyle.mWordSpacing;
nscoord extra = aTextStyle.mExtraSpacePerSpace;
if (--aTextStyle.mNumSpaces == 0) {
extra += aTextStyle.mRemainingExtraSpace;
}
glyphWidth += extra;
}
else {
if (lastFont != aTextStyle.mNormalFont) {
lastFont = aTextStyle.mNormalFont;
aRenderingContext.SetFont(lastFont);
}
aRenderingContext.GetWidth(ch, charWidth);
glyphWidth = charWidth + aTextStyle.mLetterSpacing;
}
sum += glyphWidth;
*bp++ = ch;
}
aTextStyle.mLastFont = lastFont;
*aWidthResult = sum;
}
void
nsTextFrame::PaintTextSlowly(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
nscoord width = mRect.width;
PRInt32 textLength;
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
aTextStyle.mNumSpaces = PrepareUnicodeText(tx,
(displaySelection
? &indexBuffer : nsnull),
&paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
nsFrameState frameState;
PRBool isSelected;
GetFrameState(&frameState);
isSelected = (frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
if (0 != textLength) {
if (!displaySelection || !isSelected) {
// When there is no selection showing, use the fastest and
// simplest rendering approach
RenderString(aRenderingContext, aStyleContext, aTextStyle,
text, textLength, dx, dy, width);
}
else {
SelectionDetails *details = nsnull;
nsCOMPtr<nsIPresShell> shell;
nsCOMPtr<nsIFrameSelection> frameSelection;
nsresult rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell){
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
if (NS_SUCCEEDED(rv) && frameSelection){
nsCOMPtr<nsIContent> content;
rv = GetContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv)){
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details);// last param notused
}
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
RenderString(aRenderingContext,aStyleContext, aTextStyle, text,
PRUint32(textLength), dx, dy, width, details);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
}
}
void
nsTextFrame::PaintAsciiText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIStyleContext* aStyleContext,
TextStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
PRBool displaySelection;
displaySelection = doc->GetDisplaySelection();
// Make enough space to transform
nsAutoTextBuffer unicodePaintBuffer;
nsAutoIndexBuffer indexBuffer;
if (displaySelection) {
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
}
// Transform text from content into renderable form
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
PRInt32 textLength;
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&unicodePaintBuffer, &textLength);
// Translate unicode data into ascii for rendering
char paintBufMem[TEXT_BUF_SIZE];
char* paintBuf = paintBufMem;
if (textLength > TEXT_BUF_SIZE) {
paintBuf = new char[textLength];
if (!paintBuf) {
return;
}
}
char* dst = paintBuf;
char* end = dst + textLength;
PRUnichar* src = unicodePaintBuffer.mBuffer;
while (dst < end) {
*dst++ = (char) ((unsigned char) *src++);
}
nscoord width = mRect.width;
PRInt32* ip = indexBuffer.mBuffer;
char* text = paintBuf;
nsFrameState frameState;
PRBool isSelected;
GetFrameState(&frameState);
isSelected = (frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
if (0 != textLength) {
if (!displaySelection || !isSelected) {
//if selection is > content length then selection has "slid off"
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext, aTextStyle,
dx, dy, width);
}
else {
SelectionDetails *details;
nsCOMPtr<nsIPresShell> shell;
nsCOMPtr<nsIFrameSelection> frameSelection;
nsresult rv = aPresContext->GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell){
rv = shell->GetFrameSelection(getter_AddRefs(frameSelection));
if (NS_SUCCEEDED(rv) && frameSelection){
nsCOMPtr<nsIContent> content;
rv = GetContent(getter_AddRefs(content));
if (NS_SUCCEEDED(rv)){
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength , &details);// last param notused
}
}
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
aRenderingContext.SetColor(aTextStyle.mColor->mColor);
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy);
PaintTextDecorations(aRenderingContext, aStyleContext,
aTextStyle, dx, dy, width,
unicodePaintBuffer.mBuffer,
details, 0, textLength);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
}
NS_IMETHODIMP
nsTextFrame::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 = 0;
acx->GetWidth(aText, inx, textWidth);
PRInt32 fullWidth = aBaseWidth + textWidth;
if (fullWidth == aCursorPos) {
aTextWidth = textWidth;
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
nsTextFrame::GetPosition(nsIPresContext& aCX,
nscoord aXCoord,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd)
{
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aCX.GetShell(getter_AddRefs(shell));
if (NS_SUCCEEDED(rv) && shell) {
nsCOMPtr<nsIRenderingContext> acx;
rv = shell->CreateRenderingContext(this, getter_AddRefs(acx));
if (NS_SUCCEEDED(rv)) {
TextStyle ts(&aCX, *acx, mStyleContext);
if (ts.mSmallCaps || ts.mWordSpacing || ts.mLetterSpacing) {
nsresult result = GetPositionSlowly(aCX, acx, aXCoord, aNewContent,
aContentOffset);
aContentOffsetEnd = aContentOffset;
return result;
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Find the font metrics for this text
nsIStyleContext* styleContext;
GetStyleContext(&styleContext);
const nsStyleFont *font = (const nsStyleFont*)
styleContext->GetStyleData(eStyleStruct_Font);
NS_RELEASE(styleContext);
nsCOMPtr<nsIFontMetrics> fm;
aCX.GetMetricsFor(font->mFont, getter_AddRefs(fm));
acx->SetFont(fm);
// Get the renderable form of the text
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(&aCX)));
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
PRInt32 textLength;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength <=0) {
//invalid frame to get position on
return NS_ERROR_FAILURE;
}
PRInt32* ip = indexBuffer.mBuffer;
PRInt32 indx;
PRInt32 textWidth = 0;
PRUnichar* text = paintBuffer.mBuffer;
nsPoint origin;
nsIView * view;
GetOffsetFromView(origin, &view);
PRBool found = BinarySearchForPosition(acx, text, origin.x, 0, 0,
PRInt32(textLength),
PRInt32(aXCoord) , //go to local coordinates
indx, textWidth);
if (found) {
PRInt32 charWidth;
acx->GetWidth(text[indx], charWidth);
charWidth /= 2;
if (PR_ABS(PRInt32(aXCoord) - origin.x) > textWidth+charWidth) {
indx++;
}
}
aContentOffset = indx + mContentOffset;
//reusing wordBufMem
PRInt32 i;
for (i = 0;i <= mContentLength; i ++){
if (ip[i] == aContentOffset){ //reverse mapping
aContentOffset = i + mContentOffset;
break;
}
}
aContentOffsetEnd = aContentOffset;
NS_ASSERTION(i<= mContentLength, "offset we got from binary search is messed up");
*aNewContent = mContent;
if (*aNewContent) {
(*aNewContent)->AddRef();
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetContentAndOffsetsFromPoint(nsIPresContext& aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent)
{
nsresult rv = GetPosition(aCX, (aPoint.x < 0) ? 0 : aPoint.x, aNewContent, aContentOffset, aContentOffsetEnd);
if (aContentOffset == mContentOffset)
aBeginFrameContent = PR_TRUE;
else
aBeginFrameContent = PR_FALSE;
return rv;
}
// [HACK] Foward Declarations
void ForceDrawFrame(nsFrame * aFrame);
//null range means the whole thing
NS_IMETHODIMP
nsTextFrame::SetSelected(nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread)
{
nsresult result;
if (aSelected && ParentDisablesSelection())
return NS_OK;
nsFrameState frameState;
GetFrameState(&frameState);
PRBool isSelected = ((frameState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT);
if (!aSelected && !isSelected) //already set thanks
{
return NS_OK;
}
PRBool found = PR_FALSE;
PRBool wholeContentFound = PR_FALSE;//if the entire content we look at is selected.
if (aRange) {
//lets see if the range contains us, if so we must redraw!
nsCOMPtr<nsIDOMNode> endNode;
PRInt32 endOffset;
nsCOMPtr<nsIDOMNode> startNode;
PRInt32 startOffset;
aRange->GetEndParent(getter_AddRefs(endNode));
aRange->GetEndOffset(&endOffset);
aRange->GetStartParent(getter_AddRefs(startNode));
aRange->GetStartOffset(&startOffset);
nsCOMPtr<nsIContent> content;
result = GetContent(getter_AddRefs(content));
nsCOMPtr<nsIDOMNode> thisNode;
thisNode = do_QueryInterface(content);
if (thisNode == startNode)
{
if ((mContentOffset + mContentLength) >= startOffset)
{
found = PR_TRUE;
if (thisNode == endNode)
{ //special case
if (endOffset == startOffset) //no need to redraw since drawing takes place with cursor
found = PR_FALSE;
if (mContentOffset > endOffset)
found = PR_FALSE;
}
}
}
else if (thisNode == endNode)
{
if (mContentOffset < endOffset)
found = PR_TRUE;
else
{
found = PR_FALSE;
wholeContentFound = PR_TRUE;
}
}
else
{
found = PR_TRUE;
}
}
else {
if ( aSelected != (PRBool)(frameState | NS_FRAME_SELECTED_CONTENT) ){
found = PR_TRUE;
}
}
if ( aSelected )
frameState |= NS_FRAME_SELECTED_CONTENT;
else
frameState &= ~NS_FRAME_SELECTED_CONTENT;
SetFrameState(frameState);
if (found){ //if range contains this frame...
nsRect frameRect;
GetRect(frameRect);
nsRect rect(0, 0, frameRect.width, frameRect.height);
Invalidate(rect, PR_FALSE);
// ForceDrawFrame(this);
}
if (aSpread == eSpreadDown)
{
nsIFrame *frame = GetPrevInFlow();
while(frame){
frame->SetSelected(aRange,aSelected,eSpreadNone);
result = frame->GetPrevInFlow(&frame);
if (NS_FAILED(result))
break;
}
frame = GetNextInFlow();
while (frame){
frame->SetSelected(aRange,aSelected,eSpreadNone);
result = frame->GetNextInFlow(&frame);
if (NS_FAILED(result))
break;
}
#if 0
else //we need to talk to siblings as well as flow
{
result = GetNextSibling(&frame);
while (NS_SUCCEEDED(result) && frame){
frame->SetSelected(aRange,aSelected,eSpreadDown);
result = frame->GetNextSibling(&frame);
if (NS_FAILED(result))
break;
}
}
#endif
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetPointFromOffset(nsIPresContext* aPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint)
{
if (!aPresContext || !inRendContext || !outPoint)
return NS_ERROR_NULL_POINTER;
if (mContentLength <= 0) {
outPoint->x = 0;
outPoint->y = 0;
return NS_OK;
}
inOffset-=mContentOffset;
if (inOffset < 0){
NS_ASSERTION(0,"offset less than this frame has in GetPointFromOffset");
inOffset = 0;
}
TextStyle ts(aPresContext, *inRendContext, mStyleContext);
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Transform text from content into renderable form
nsCOMPtr<nsIDocument> doc(getter_AddRefs(GetDocument(aPresContext)));
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
PRInt32 textLength;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
if (inOffset > mContentLength){
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
inOffset = mContentLength;
}
nscoord width = mRect.width;
GetWidth(*inRendContext, ts,
paintBuffer.mBuffer, ip[inOffset]-mContentOffset,
&width);
outPoint->x = width;
outPoint->y = 0;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame **outChildFrame)
{
if (nsnull == outChildFrame)
return NS_ERROR_NULL_POINTER;
nsresult result;
PRInt32 contentOffset = inContentOffset;
if (contentOffset != -1) //-1 signified the end of the current content
contentOffset = inContentOffset - mContentOffset;
if ((contentOffset > mContentLength) || ((contentOffset == mContentLength) && inHint) )
{
//this is not the frame we are looking for.
nsIFrame *nextInFlow;
nextInFlow = GetNextInFlow();
if (nextInFlow)
{
return nextInFlow->GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
}
else if (contentOffset != mContentLength) //that condition was only for when there is a choice
return NS_ERROR_FAILURE;
}
if (inContentOffset < mContentOffset) //could happen with floaters!
{
result = GetPrevInFlow(outChildFrame);
if (NS_SUCCEEDED(result) && outChildFrame)
return (*outChildFrame)->GetChildFrameContainingOffset(inContentOffset, inHint,
outFrameContentOffset,outChildFrame);
else
return result;
}
*outFrameContentOffset = contentOffset;
*outChildFrame = this;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::PeekOffset(nsPeekOffsetStruct *aPos)
{
if (!aPos || !mContent)
return NS_ERROR_NULL_POINTER;
if (aPos->mStartOffset < 0 )
aPos->mStartOffset = mContentLength + mContentOffset;
if (aPos->mStartOffset < mContentOffset){
aPos->mStartOffset = mContentOffset;
}
if (aPos->mStartOffset > (mContentOffset + mContentLength)){
nsIFrame *nextInFlow;
nextInFlow = GetNextInFlow();
if (!nextInFlow){
NS_ASSERTION(PR_FALSE,"nsTextFrame::PeekOffset no more flow \n");
return NS_ERROR_INVALID_ARG;
}
return nextInFlow->PeekOffset(aPos);
}
if (aPos->mAmount == eSelectLine || aPos->mAmount == eSelectBeginLine
|| aPos->mAmount == eSelectEndLine)
{
return nsFrame::PeekOffset(aPos);
}
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
PRInt32* ip = indexBuffer.mBuffer;
PRInt32 textLength;
nsresult result(NS_ERROR_FAILURE);
aPos->mResultContent = mContent;//do this right off
switch (aPos->mAmount){
case eSelectNoAmount:
{
// Transform text from content into renderable form
nsIDocument* doc;
result = mContent->GetDocument(doc);
if (NS_FAILED(result) || !doc) {
return result;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
NS_RELEASE(doc);
nsTextTransformer tx(lb, nsnull);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength)//if no renderable length, you cant park here.
{
aPos->mContentOffset = aPos->mStartOffset;
result = NS_OK;
}
else
{
aPos->mAmount = eSelectDir;//go to "next" or previous frame based on direction not THIS frame
return nsFrame::PeekOffset(aPos);//no matter what this is not a valid frame to end up on
}
}
break;
case eSelectCharacter:
{
// Transform text from content into renderable form
nsIDocument* doc;
result = mContent->GetDocument(doc);
if (NS_FAILED(result) || !doc) {
return result;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
NS_RELEASE(doc);
nsTextTransformer tx(lb, nsnull);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
nsIFrame *frameUsed = nsnull;
PRInt32 start;
PRBool found = PR_TRUE;
if (aPos->mDirection == eDirPrevious){
aPos->mContentOffset = 0;
PRInt32 i;
for (i = aPos->mStartOffset -1 - mContentOffset; i >=0; i--){
if (ip[i] < ip[aPos->mStartOffset - mContentOffset]){
aPos->mContentOffset = i + mContentOffset;
break;
}
}
if (i <0){
found = PR_FALSE;
frameUsed = GetPrevInFlow();
start = mContentOffset;
aPos->mContentOffset = start;//in case next call fails we stop at this offset
}
}
else if (aPos->mDirection == eDirNext){
PRInt32 i;
aPos->mContentOffset = mContentLength;
for (i = aPos->mStartOffset +1 - mContentOffset; i <= mContentLength; i++){
if (ip[i] > ip[aPos->mStartOffset - mContentOffset]){
aPos->mContentOffset = i + mContentOffset;
break;
}
}
/* if (aStartOffset == 0 && (mState & 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 = mContentOffset + mContentLength;
aPos->mContentOffset = start;//in case next call fails we stop at this offset
}
}
if (!found)
result = nsFrame::PeekOffset(aPos);
else
aPos->mResultContent = mContent;
}
break;
case eSelectWord:
{
// Transform text from content into renderable form
nsIDocument* doc;
result = mContent->GetDocument(doc);
if (NS_FAILED(result) || !doc) {
return result;
}
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsCOMPtr<nsIWordBreaker> wb;
doc->GetWordBreaker(getter_AddRefs(wb));
NS_RELEASE(doc);
nsTextTransformer tx(lb, wb);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
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 (aPos->mDirection == eDirPrevious){
keepSearching = PR_TRUE;
tx.Init(this, mContent, aPos->mStartOffset);
if (tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace,
PR_FALSE) &&
(aPos->mStartOffset - contentLen >= mContentOffset) ){
if ((aPos->mEatingWS && !isWhitespace) || !aPos->mEatingWS){
aPos->mContentOffset = aPos->mStartOffset - contentLen;
//check for whitespace next.
if (isWhitespace && aPos->mContentOffset <= mContentOffset)
{
keepSearching = PR_FALSE;//reached the beginning of a word
aPos->mEatingWS = PR_FALSE;//if no real word then
}
else{
while (isWhitespace &&
tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen,
&isWhitespace, PR_FALSE)){
aPos->mContentOffset -= contentLen;
aPos->mEatingWS = PR_TRUE;
}
aPos->mEatingWS = !isWhitespace;//nowhite space, just eat chars.
keepSearching = aPos->mContentOffset <= mContentOffset;
if (!isWhitespace){
if (!keepSearching)
found = PR_TRUE;
else
aPos->mEatingWS = PR_TRUE;
}
}
}
else {
aPos->mContentOffset = mContentLength + mContentOffset;
found = PR_TRUE;
}
}
}
else if (aPos->mDirection == eDirNext) {
tx.Init(this, mContent, aPos->mStartOffset );
#ifdef DEBUGWORDJUMP
printf("Next- Start=%d aPos->mEatingWS=%s\n", aPos->mStartOffset, aPos->mEatingWS ? "TRUE" : "FALSE");
#endif
if (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, PR_FALSE) &&
(aPos->mStartOffset + contentLen <= (mContentLength + mContentOffset))){
#ifdef DEBUGWORDJUMP
printf("GetNextWord return non null, wordLen%d, contentLen%d isWhitespace=%s\n",
wordLen, contentLen, isWhitespace ? "WS" : "NOT WS");
#endif
if ((aPos->mEatingWS && isWhitespace) || !aPos->mEatingWS){
aPos->mContentOffset = aPos->mStartOffset + contentLen;
//check for whitespace next.
keepSearching = PR_TRUE;
aPos->mEatingWS = PR_TRUE;
while (!isWhitespace && tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, PR_FALSE)){
#ifdef DEBUGWORDJUMP
printf("2-GetNextWord return non null, wordLen%d, contentLen%d isWhitespace=%s\n",
wordLen, contentLen, isWhitespace ? "WS" : "NOT WS");
#endif
aPos->mContentOffset += contentLen;
keepSearching = PR_FALSE;
}
}
else if (aPos->mEatingWS)
aPos->mContentOffset = mContentOffset;
found = isWhitespace;
if (!isWhitespace){
aPos->mEatingWS = PR_FALSE;
}
else if (!keepSearching) //we have found the "whole" word so just looking for WS
aPos->mEatingWS = PR_TRUE;
}
frameUsed = GetNextInFlow();
start = 0;
}
#ifdef DEBUGWORDJUMP
printf("aEatingWS = %s\n" , aPos->mEatingWS ? "TRUE" : "FALSE");
#endif
if (!found || (aPos->mContentOffset > (mContentOffset + mContentLength)) || (aPos->mContentOffset < mContentOffset))
{
aPos->mContentOffset = PR_MIN(aPos->mContentOffset, mContentOffset + mContentLength);
aPos->mContentOffset = PR_MAX(aPos->mContentOffset, mContentOffset);
result = nsFrame::PeekOffset(aPos);
}
else
aPos->mResultContent = mContent;
}
break;
default:
result = NS_ERROR_FAILURE; break;
}
aPos->mContentOffsetEnd = aPos->mContentOffset;
if (NS_FAILED(result)){
aPos->mResultContent = mContent;
//aPos->mContentOffset = aPos->mStartOffset;
result = NS_OK;
}
aPos->mResultFrame = this;
return result;
}
NS_IMETHODIMP
nsTextFrame::HandleMultiplePress(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus)
{
if (!DisplaySelection(aPresContext)) {
return NS_OK;
}
nsMouseEvent *me = (nsMouseEvent *)aEvent;
nsCOMPtr<nsIPresShell> shell;
nsresult rv = aPresContext.GetShell(getter_AddRefs(shell));
if (me->clickCount > 2)//triple clicking
{
nsCOMPtr<nsIPref> mPrefs;
PRInt32 prefInt = 0;
rv = nsServiceManager::GetService(kPrefCID,
nsIPref::GetIID(),
(nsISupports**)&mPrefs);
if (NS_SUCCEEDED(rv) && mPrefs)
{
if (NS_SUCCEEDED(mPrefs->GetIntPref("browser.triple_click_style", &prefInt)) && prefInt)
return nsFrame::HandleMultiplePress(aPresContext, aEvent, aEventStatus);
}
nsCOMPtr<nsIDOMNode> startNode;
nsCOMPtr<nsIDOMNode> endNode;
nsTextFrame *currentFrame = this;
nsTextFrame *prevFrame = (nsTextFrame *)GetPrevInFlow();
while(prevFrame){
currentFrame = prevFrame;
prevFrame = (nsTextFrame *)currentFrame->GetPrevInFlow();
if (NS_FAILED(rv))
break;
}
prevFrame = currentFrame;
currentFrame = this;
nsTextFrame *nextFrame = (nsTextFrame *)GetNextInFlow();
while (nextFrame){
currentFrame = nextFrame;
nextFrame = (nsTextFrame *)currentFrame->GetNextInFlow();
if (NS_FAILED(rv))
break;
}
nextFrame = currentFrame;
nsCOMPtr<nsIContent> content;
if (prevFrame)
prevFrame->GetContent(getter_AddRefs(content));
startNode = do_QueryInterface(content,&rv);
if (NS_FAILED(rv) || !startNode)
return rv?rv:NS_ERROR_FAILURE;
nextFrame->GetContent(getter_AddRefs(content));
endNode = do_QueryInterface(content,&rv);
if (NS_FAILED(rv) || !endNode)
return rv?rv:NS_ERROR_FAILURE;
PRInt32 startOffset;
PRInt32 endOffset;
PRInt32 unusedOffset;
rv = prevFrame->GetOffsets(startOffset,unusedOffset);
if (NS_FAILED(rv))
return rv;
rv = nextFrame->GetOffsets(unusedOffset,endOffset);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIDOMSelection> selection;
if (NS_SUCCEEDED(shell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection)))){
rv = selection->Collapse(startNode, startOffset);
if (NS_FAILED(rv))
return rv;
rv = selection->Extend(endNode, endOffset);
if (NS_FAILED(rv))
return rv;
}
}
else if (NS_SUCCEEDED(rv) && shell) {
nsCOMPtr<nsIRenderingContext> acx;
nsCOMPtr<nsIFocusTracker> tracker;
tracker = do_QueryInterface(shell, &rv);
if (NS_FAILED(rv) || !tracker)
return rv?rv:NS_ERROR_FAILURE;
rv = shell->CreateRenderingContext(this, getter_AddRefs(acx));
if (NS_SUCCEEDED(rv)){
PRInt32 startPos = 0;
PRInt32 contentOffsetEnd = 0;
nsCOMPtr<nsIContent> newContent;
//find which word needs to be selected! use peek offset one way then the other
nsCOMPtr<nsIContent> startContent;
nsCOMPtr<nsIDOMNode> startNode;
nsCOMPtr<nsIContent> endContent;
nsCOMPtr<nsIDOMNode> endNode;
if (NS_SUCCEEDED(GetPosition(aPresContext, aEvent->point.x,
getter_AddRefs(newContent), startPos, contentOffsetEnd))){
//peeks{}
nsPeekOffsetStruct startpos;
startpos.SetData(tracker,
0,
eSelectWord,
eDirPrevious,
startPos,
PR_FALSE,
PR_TRUE);
rv = PeekOffset(&startpos);
if (NS_FAILED(rv))
return rv;
nsPeekOffsetStruct endpos;
endpos.SetData(tracker,
0,
eSelectWord,
eDirNext,
startPos,
PR_FALSE,
PR_FALSE);
rv = PeekOffset(&endpos);
if (NS_FAILED(rv))
return rv;
endNode = do_QueryInterface(endpos.mResultContent,&rv);
if (NS_FAILED(rv))
return rv;
startNode = do_QueryInterface(startpos.mResultContent,&rv);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIDOMSelection> selection;
if (NS_SUCCEEDED(shell->GetSelection(SELECTION_NORMAL, getter_AddRefs(selection)))){
rv = selection->Collapse(startNode,startpos.mContentOffset);
if (NS_FAILED(rv))
return rv;
rv = selection->Extend(endNode,endpos.mContentOffset);
if (NS_FAILED(rv))
return rv;
}
//no release
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetOffsets(PRInt32 &start, PRInt32 &end) const
{
start = mContentOffset;
end = mContentOffset+mContentLength;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": BeginReflow: availableSize=%d,%d\n",
aReflowState.availableWidth, aReflowState.availableHeight);
#endif
// 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.mLineLayout) {
// XXX Add a method to aMetrics that does this; we do it several places
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
if (nsnull != aMetrics.maxElementSize) {
aMetrics.maxElementSize->width = 0;
aMetrics.maxElementSize->height = 0;
}
return NS_OK;
}
// Get starting offset into the content
PRInt32 startingOffset = 0;
if (nsnull != mPrevInFlow) {
nsTextFrame* prev = (nsTextFrame*) mPrevInFlow;
startingOffset = prev->mContentOffset + prev->mContentLength;
// If our starting offset doesn't agree with mContentOffset, then our
// prev-in-flow has changed the number of characters it maps and so we
// need to measure text and not try and optimize a resize reflow
if (startingOffset != mContentOffset) {
mState &= ~TEXT_OPTIMIZE_RESIZE;
}
}
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
TextStyle ts(&aPresContext, *aReflowState.rendContext, mStyleContext);
// Clear out the reflow state flags in mState (without destroying
// the TEXT_BLINK_ON bit).
PRBool lastTimeWeSkippedLeadingWS = 0 != (mState & TEXT_SKIP_LEADING_WS);
mState &= ~TEXT_REFLOW_FLAGS;
if (ts.mFont->mFont.decorations & NS_STYLE_TEXT_DECORATION_BLINK) {
if (0 == (mState & TEXT_BLINK_ON)) {
mState |= TEXT_BLINK_ON;
gTextBlinker->AddFrame(this);
}
}
else {
if (0 != (mState & TEXT_BLINK_ON)) {
mState &= ~TEXT_BLINK_ON;
gTextBlinker->RemoveFrame(this);
}
}
PRBool wrapping = (NS_STYLE_WHITESPACE_NORMAL == ts.mText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == ts.mText->mWhiteSpace);
PRBool firstLetterOK = lineLayout.GetFirstLetterStyleOK();
PRBool justDidFirstLetter = PR_FALSE;
// Set whitespace skip flag
PRBool skipWhitespace = PR_FALSE;
if (!ts.mPreformatted) {
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;
// Setup text transformer to transform this frames text content
nsCOMPtr<nsIDocument> doc;
mContent->GetDocument(*getter_AddRefs(doc));
nsCOMPtr<nsILineBreaker> lb;
doc->GetLineBreaker(getter_AddRefs(lb));
nsTextTransformer tx(lb, nsnull);
nsresult rv = tx.Init(this, mContent, 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() ||
((nsnull != mPrevInFlow) &&
(((nsTextFrame*)mPrevInFlow)->mState & TEXT_FIRST_LETTER));
if (inWord) {
mState |= TEXT_IN_WORD;
}
mState &= ~TEXT_FIRST_LETTER;
PRInt32 column = lineLayout.GetColumn();
PRInt32 prevColumn = column;
mColumn = column;
PRBool breakable = lineLayout.LineIsBreakable();
PRInt32 lastWordLen;
PRUnichar* bp = nsnull;
PRBool measureText = PR_TRUE;
// We can avoid actually measuring the text if:
// - this is a resize reflow
// - we're not dirty (see ContentChanged() function)
// - we don't have a next in flow
// - the previous reflow successfully reflowed all text in the
// available space
// - we aren't computing the max element size (that requires we measure
// text)
// - skipping leading whitespace is the same as it was the last time
// - we're wrapping text and the available width is at least as big as our
// current frame width -or-
// we're not wrapping text and we're at the same column as before (this is
// an issue for preformatted tabbed text only)
if ((eReflowReason_Resize == aReflowState.reason) &&
(0 == (mState & NS_FRAME_IS_DIRTY))) {
nscoord realWidth = mRect.width;
if (mState & TEXT_TRIMMED_WS) {
realWidth += ts.mSpaceWidth;
}
if (!mNextInFlow &&
(mState & TEXT_OPTIMIZE_RESIZE) &&
!aMetrics.maxElementSize &&
(lastTimeWeSkippedLeadingWS == skipWhitespace) &&
((wrapping && (maxWidth >= realWidth)) ||
(!wrapping && (prevColumn == column)))) {
// We can skip measuring of text and use the value from our
// previous reflow
measureText = PR_FALSE;
#ifdef NOISY_REFLOW
printf(" => measureText=%s wrapping=%s skipWhitespace=%s",
measureText ? "yes" : "no",
wrapping ? "yes" : "no",
skipWhitespace ? "yes" : "no");
printf(" realWidth=%d maxWidth=%d\n",
realWidth, maxWidth);
#endif
}
}
for (;;) {
// Get next word/whitespace from the text
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
bp = tx.GetNextWord(inWord, &wordLen, &contentLen, &isWhitespace);
if (nsnull == bp) {
break;
}
lastWordLen = wordLen;
inWord = PR_FALSE;
// Measure the word/whitespace
nscoord width;
if (isWhitespace) {
if ('\n' == bp[0]) {
// We hit a newline. Stop looping.
NS_WARN_IF_FALSE(ts.mPreformatted, "newline w/o ts.mPreformatted");
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
mState |= 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 = (wordLen * 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 (measureText) {
if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, bp, wordLen, &width);
}
else {
aReflowState.rendContext->GetWidth(bp, wordLen, width);
if (ts.mLetterSpacing) {
width += ts.mLetterSpacing * wordLen;
}
}
lastWordWidth = width;
}
skipWhitespace = PR_FALSE;
}
// See if there is room for the text
if (measureText) {
if ((0 != x) && wrapping && (x + width > maxWidth)) {
// The text will not fit.
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": won't fit (at offset=%d) x=%d width=%d maxWidth=%d\n",
offset, x, width, maxWidth);
#endif
break;
}
x += width;
prevMaxWordWidth = maxWordWidth;
if (width > maxWordWidth) {
maxWordWidth = width;
}
}
prevColumn = column;
column += wordLen;
endsInWhitespace = isWhitespace;
prevOffset = offset;
offset += contentLen;
if (!isWhitespace && justDidFirstLetter) {
// Time to stop
break;
}
}
if (tx.HasMultibyte()) {
mState |= TEXT_HAS_MULTIBYTE;
}
// If we didn't actually measure any text, then make sure it looks
// like we did
if (!measureText) {
x = mRect.width;
if (mState & TEXT_TRIMMED_WS) {
// Add back in the width of a space since it was trimmed away last time
x += ts.mSpaceWidth;
}
}
mState &= ~TEXT_TRIMMED_WS;
// 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.GetWordBuffer(), lastWordLen);
ListTag(stdout);
printf(": start='");
fputs(tmp, stdout);
printf("' lastWordLen=%d baseWidth=%d prevOffset=%d offset=%d next=",
lastWordLen, lastWordWidth, prevOffset, offset);
ListTag(stdout, next);
printf("\n");
#endif
PRUnichar* pWordBuf = tx.GetWordBuffer();
PRUint32 wordBufLen = tx.GetWordBufferLength();
// 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.
if (!measureText) {
// We didn't measure any text so we don't know lastWordWidth.
// We have to compute it now
if (prevOffset == startingOffset) {
// There's only one word, so we don't have to measure after all
lastWordWidth = x;
}
else if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, tx.GetWordBuffer(),
lastWordLen, &lastWordWidth);
}
else {
aReflowState.rendContext->GetWidth(tx.GetWordBuffer(),
lastWordLen, lastWordWidth);
if (ts.mLetterSpacing) {
lastWordWidth += ts.mLetterSpacing * lastWordLen;
}
}
}
nscoord wordWidth = ComputeTotalWordWidth(&aPresContext, lb,
lineLayout,
aReflowState, next,
lastWordWidth,
pWordBuf,
lastWordLen,
wordBufLen);
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 {
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": look-ahead (didn't fit) x=%d wordWidth=%d lastWordWidth=%d\n",
x, wordWidth, lastWordWidth);
#endif
// 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.SetFirstLetterFrame(this);
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
mState |= TEXT_FIRST_LETTER;
}
// Setup metrics for caller; store final max-element-size information
aMetrics.width = x;
if ((0 == x) && !ts.mPreformatted) {
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;
// If it's an incremental reflow command, then invalidate our existing
// bounds.
// XXX We need a finer granularity than this, but it isn't clear what
// has actually changed...
if (eReflowReason_Incremental == aReflowState.reason) {
Invalidate(mRect);
}
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;
// For future resize reflows we would like to avoid measuring the text.
// We can only do this if after this reflow we're:
// - complete. If we're not complete then our desired width doesn't
// represent our total size
// - we fit in the available space. We may be complete, but if we
// return a larger desired width than is available we may get pushed
// and our frame width won't get set
if ((NS_FRAME_COMPLETE == aStatus) && (aMetrics.width <= maxWidth)) {
mState |= TEXT_OPTIMIZE_RESIZE;
mRect.width = aMetrics.width;
}
else {
mState &= ~TEXT_OPTIMIZE_RESIZE;
}
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": desiredSize=%d,%d(a=%d/d=%d) status=%x\n",
aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent,
aStatus);
#endif
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
{
aUsedSpace = 0;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::TrimTrailingWhiteSpace(nsIPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth)
{
nscoord dw = 0;
const nsStyleText* textStyle = (const nsStyleText*)
mStyleContext->GetStyleData(eStyleStruct_Text);
if (mContentLength &&
(NS_STYLE_WHITESPACE_PRE != textStyle->mWhiteSpace) &&
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP != textStyle->mWhiteSpace)) {
// Get the text fragments that make up our content
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
if (tc) {
const nsTextFragment* frag;
tc->GetText(&frag);
PRInt32 lastCharIndex = mContentOffset + mContentLength - 1;
if (lastCharIndex < frag->GetLength()) {
PRUnichar ch = frag->CharAt(lastCharIndex);
if (XP_IS_SPACE(ch)) {
// 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);
aRC.SetFont(fontStyle->mFont);
aRC.GetWidth(' ', dw);
}
}
}
}
#ifdef NOISY_TRIM
ListTag(stdout);
printf(": trim => %d\n", dw);
#endif
if (0 != dw) {
mState |= TEXT_TRIMMED_WS;
}
else {
mState &= ~TEXT_TRIMMED_WS;
}
aDeltaWidth = dw;
return NS_OK;
}
nscoord
nsTextFrame::ComputeTotalWordWidth(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nscoord aBaseWidth,
const PRUnichar* aWordBuf,
PRUint32 aWordLen,
PRUint32 aWordBufSize)
{
nscoord addedWidth = 0;
while (nsnull != aNextFrame) {
nsIContent* content = nsnull;
if ((NS_OK == aNextFrame->GetContent(&content)) && (nsnull != content)) {
#ifdef DEBUG_WORD_WRAPPING
printf(" next textRun=");
nsFrame::ListTag(stdout, aNextFrame);
printf("\n");
#endif
nsITextContent* tc;
if (NS_OK == content->QueryInterface(kITextContentIID, (void**)&tc)) {
PRBool stop;
nscoord moreWidth = ComputeWordFragmentWidth(aPresContext,
aLineBreaker,
aLineLayout,
aReflowState,
aNextFrame, content, tc,
&stop,
aWordBuf,
aWordLen,
aWordBufSize);
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;
}
}
// 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
nsTextFrame::ComputeWordFragmentWidth(nsIPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aTextFrame,
nsIContent* aContent,
nsITextContent* aText,
PRBool* aStop,
const PRUnichar* aWordBuf,
PRUint32& aRunningWordLen,
PRUint32 aWordBufSize)
{
nsTextTransformer tx(aLineBreaker, nsnull);
tx.Init(aTextFrame, aContent, 0);
PRBool isWhitespace;
PRInt32 wordLen, contentLen;
PRUnichar* bp = tx.GetNextWord(PR_TRUE, &wordLen, &contentLen,
&isWhitespace);
if (!bp || isWhitespace) {
// Don't bother measuring nothing
*aStop = PR_TRUE;
return 0;
}
*aStop = contentLen < tx.GetContentLength();
// We need to adjust the length by look at the two pieces together
// XXX this should grow aWordBuf if necessary
PRUint32 copylen = sizeof(PRUnichar) *
( ((wordLen + aRunningWordLen) > aWordBufSize)
? (aWordBufSize - aRunningWordLen)
: wordLen
);
if((aWordBufSize > aRunningWordLen) && (copylen > 0))
{
nsCRT::memcpy((void*)&(aWordBuf[aRunningWordLen]), bp, copylen);
PRUint32 breakP=0;
PRBool needMore=PR_TRUE;
nsresult lres = aLineBreaker->Next(aWordBuf, aRunningWordLen+wordLen,
0, &breakP, &needMore);
if(NS_SUCCEEDED(lres))
{
// when we look at two pieces text together, we might decide to break
// eariler than if we only look at the 2nd pieces of text
if(!needMore && (breakP < (aRunningWordLen + wordLen)))
{
wordLen = breakP - aRunningWordLen;
if(wordLen < 0)
wordLen = 0;
*aStop = PR_TRUE;
}
}
// if we don't stop, we need to extend the buf so the next one can
// see this part otherwise, it does not matter since we will stop
// anyway
if(! *aStop)
aRunningWordLen += wordLen;
}
if((*aStop) && (wordLen == 0))
return 0;
nsCOMPtr<nsIStyleContext> sc;
aTextFrame->GetStyleContext(getter_AddRefs(sc));
if (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;
nsCOMPtr<nsIFontMetrics> oldfm;
rc.GetFontMetrics(*getter_AddRefs(oldfm));
TextStyle ts(&aLineLayout.mPresContext, rc, sc);
if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, bp, wordLen, &width);
}
else {
rc.GetWidth(bp, wordLen, width);
}
rc.SetFont(oldfm);
#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
nsTextFrame::ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const
{
const nsTextFragment* frag;
// Get the frames text content
nsITextContent* tc;
if (NS_OK != mContent->QueryInterface(kITextContentIID, (void**) &tc)) {
return;
}
tc->GetText(&frag);
NS_RELEASE(tc);
// Compute the total length of the text content.
*aTotalContentLength = frag->GetLength();
// Set current fragment and current fragment offset
if (0 == mContentLength) {
return;
}
PRInt32 fragOffset = mContentOffset;
PRInt32 n = fragOffset + mContentLength;
while (fragOffset < n) {
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);
}
}
}
NS_IMETHODIMP
nsTextFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::textFrame;
NS_ADDREF(*aType);
return NS_OK;
}
#ifdef DEBUG
NS_IMETHODIMP
nsTextFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = sizeof(*this);
return NS_OK;
}
#endif
NS_IMETHODIMP
nsTextFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("Text", aResult);
}
NS_IMETHODIMP
nsTextFrame::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 totalContentLength;
nsAutoString tmp;
ToCString(tmp, &totalContentLength);
// Output the first/last content offset and prev/next in flow info
PRBool isComplete = (mContentOffset + mContentLength) == totalContentLength;
fprintf(out, "[%d,%d,%c] ",
mContentOffset, mContentLength,
isComplete ? 'T':'F');
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", mNextSibling);
}
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);
}
fprintf(out, " sc=%p<\n", mStyleContext);
// Output the text
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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