mirror of
https://github.com/mozilla/gecko-dev.git
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298 lines
8.0 KiB
C++
298 lines
8.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsBlockFrame.h"
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#include "nsLineBox.h"
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#include "nsLineLayout.h"
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#include "nsHTMLIIDs.h"
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#define nsInlineFrameSuper nsBaseIBFrame
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class nsInlineFrame : public nsInlineFrameSuper
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{
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public:
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friend nsresult NS_NewInlineFrame(nsIFrame*& aNewFrame);
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// nsIFrame overrides
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NS_IMETHOD CreateContinuingFrame(nsIPresContext& aCX,
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nsIFrame* aParent,
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nsIStyleContext* aStyleContext,
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nsIFrame*& aContinuingFrame);
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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// nsIHTMLReflow overrides
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NS_IMETHOD FindTextRuns(nsLineLayout& aLineLayout);
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NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
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NS_IMETHOD TrimTrailingWhiteSpace(nsIPresContext& aPresContext,
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nsIRenderingContext& aRC,
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nscoord& aDeltaWidth);
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protected:
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nsInlineFrame();
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~nsInlineFrame();
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virtual PRIntn GetSkipSides() const;
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struct AdjustData {
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nsIFrame* frame;
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PRBool splittable;
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nsRect bounds;
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};
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};
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//----------------------------------------------------------------------
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nsresult
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NS_NewInlineFrame(nsIFrame*& aNewFrame)
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{
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nsInlineFrame* it = new nsInlineFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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aNewFrame = it;
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return NS_OK;
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}
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nsInlineFrame::nsInlineFrame()
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{
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mFlags = BLOCK_IS_INLINE;
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}
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nsInlineFrame::~nsInlineFrame()
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{
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}
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NS_IMETHODIMP
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nsInlineFrame::FindTextRuns(nsLineLayout& aLineLayout)
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{
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nsresult rv = NS_OK;
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// Gather up children from the overflow lists
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DrainOverflowLines();
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nsLineBox* line = mLines;
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while (nsnull != line) {
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if (!line->IsBlock()) {
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// A frame that doesn't implement nsIHTMLReflow isn't text
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// therefore it will end an open text run.
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nsIFrame* frame = line->mFirstChild;
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PRInt32 n = line->ChildCount();
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while (--n >= 0) {
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nsIHTMLReflow* hr;
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if (NS_OK == frame->QueryInterface(kIHTMLReflowIID, (void**)&hr)) {
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rv = hr->FindTextRuns(aLineLayout);
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if (NS_OK != rv) {
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return rv;
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}
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}
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else {
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aLineLayout.EndTextRun();
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}
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frame->GetNextSibling(frame);
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}
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}
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else {
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// Block lines terminate the text-runs
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aLineLayout.EndTextRun();
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}
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line = line->mNext;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsInlineFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
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{
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// XXX Refactor this
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if (0 >= aExtraSpace) {
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aUsedSpace = 0;
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return NS_OK;
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}
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const int NUM_AD = 50;
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AdjustData adjustMem[NUM_AD];
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AdjustData* ad0 = adjustMem;
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AdjustData* end = ad0 + NUM_AD;
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AdjustData* ad = ad0;
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PRInt32 numAD = NUM_AD;
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// Gather up raw data for justification
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nsIFrame* frame = mLines ? mLines->mFirstChild : nsnull;
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PRInt32 fixed = 0;
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PRInt32 total = 0;
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nscoord fixedWidth = 0;
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for (; nsnull != frame; ad++, total++) {
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// Grow temporary storage if we have to
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if (ad == end) {
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AdjustData* newAD = new AdjustData[numAD + numAD];
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if (nsnull == newAD) {
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if (ad0 != adjustMem) {
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delete [] ad0;
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}
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aUsedSpace = 0;
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return NS_OK;
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}
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nsCRT::memcpy(newAD, ad0, sizeof(AdjustData) * numAD);
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ad = newAD + (ad - ad0);
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if (ad0 != adjustMem) {
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delete [] ad0;
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}
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ad0 = newAD;
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end = ad0 + numAD;
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numAD = numAD + numAD;
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}
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// Record info about the frame
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ad->frame = frame;
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frame->GetRect(ad->bounds);
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nsSplittableType isSplittable = NS_FRAME_NOT_SPLITTABLE;
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frame->IsSplittable(isSplittable);
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if ((0 == ad->bounds.width) ||
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NS_FRAME_IS_NOT_SPLITTABLE(isSplittable)) {
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ad->splittable = PR_FALSE;
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fixed++;
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fixedWidth += ad->bounds.width;
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}
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else {
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ad->splittable = PR_TRUE;
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}
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// Advance to the next frame
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frame->GetNextSibling(frame);
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}
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nscoord totalUsed = 0;
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nscoord variableWidth = mRect.width - fixedWidth;
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if (variableWidth > 0) {
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// Each variable width frame gets a portion of the available extra
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// space that is proportional to the space it takes in the
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// line. The extra space is given to the frame by updating its
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// position and size. The frame is responsible for adjusting the
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// position of its contents on its own (during rendering).
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PRInt32 i, splittable = total - fixed;
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nscoord extraSpace = aExtraSpace;
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nscoord remainingExtra = extraSpace;
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nscoord dx = 0;
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float lineWidth = float(mRect.width);
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ad = ad0;
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for (i = 0; i < total; i++, ad++) {
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nsIFrame* frame = ad->frame;
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nsIHTMLReflow* ihr;
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if (NS_OK == frame->QueryInterface(kIHTMLReflowIID, (void**)&ihr)) {
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nsRect r;
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if (ad->splittable && (ad->bounds.width > 0)) {
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float pctOfLine = float(ad->bounds.width) / lineWidth;
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nscoord extra = nscoord(pctOfLine * extraSpace);
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if (--splittable == 0) {
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extra = remainingExtra;
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}
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if (0 != extra) {
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nscoord used;
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ihr->AdjustFrameSize(extra, used);
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if (used < extra) {
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// frame->ListTag(); printf(": extra=%d used=%d\n", extra, used);
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}
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totalUsed += used;
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frame->GetRect(r);
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r.x += dx;
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frame->SetRect(r);
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dx += used;
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remainingExtra -= used;
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}
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else if (0 != dx) {
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frame->GetRect(r);
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r.x += dx;
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frame->SetRect(r);
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}
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}
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else if (0 != dx) {
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frame->GetRect(r);
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r.x += dx;
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frame->SetRect(r);
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}
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}
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}
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}
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mRect.width += totalUsed;
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aUsedSpace = totalUsed;
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if (ad0 != adjustMem) {
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delete [] ad0;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsInlineFrame::TrimTrailingWhiteSpace(nsIPresContext& aPresContext,
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nsIRenderingContext& aRC,
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nscoord& aDeltaWidth)
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{
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aDeltaWidth = 0;
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nsLineBox* lastLine = nsLineBox::LastLine(mLines);
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if (nsnull != lastLine) {
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nsIFrame* lastFrame = lastLine->LastChild();
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if (nsnull != lastFrame) {
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nsIHTMLReflow* ihr;
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if (NS_OK == lastFrame->QueryInterface(kIHTMLReflowIID, (void**)&ihr)) {
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ihr->TrimTrailingWhiteSpace(aPresContext, aRC, aDeltaWidth);
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if (0 != aDeltaWidth) {
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mRect.width -= aDeltaWidth;
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}
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}
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsInlineFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Inline", aResult);
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}
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NS_IMETHODIMP
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nsInlineFrame::CreateContinuingFrame(nsIPresContext& aPresContext,
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nsIFrame* aParent,
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nsIStyleContext* aStyleContext,
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nsIFrame*& aContinuingFrame)
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{
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nsInlineFrame* cf = new nsInlineFrame;
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if (nsnull == cf) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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cf->Init(aPresContext, mContent, aParent, aStyleContext);
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cf->SetFlags(mFlags);
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cf->AppendToFlow(this);
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aContinuingFrame = cf;
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return NS_OK;
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}
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PRIntn
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nsInlineFrame::GetSkipSides() const
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{
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PRIntn skip = 0;
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if (nsnull != mPrevInFlow) {
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skip |= 1 << NS_SIDE_LEFT;
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}
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if (nsnull != mNextInFlow) {
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skip |= 1 << NS_SIDE_RIGHT;
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}
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return skip;
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}
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