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289 lines
7.1 KiB
C++
289 lines
7.1 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 "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsLineBox.h"
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#include "nsISpaceManager.h"
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#include "nsIStyleContext.h"
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#include "nsLineLayout.h"
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#include "prprf.h"
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nsLineBox::nsLineBox(nsIFrame* aFrame, PRInt32 aCount, PRUint16 flags)
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{
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mFirstChild = aFrame;
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mChildCount = aCount;
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mState = LINE_IS_DIRTY | LINE_NEED_DID_REFLOW | flags;
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mFloaters = nsnull;
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mNext = nsnull;
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mBounds.SetRect(0,0,0,0);
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mCombinedArea.SetRect(0,0,0,0);
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//XXX mCarriedOutTopMargin = 0;
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mCarriedOutBottomMargin = 0;
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mBreakType = NS_STYLE_CLEAR_NONE;
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}
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nsLineBox::~nsLineBox()
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{
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if (nsnull != mFloaters) {
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delete mFloaters;
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}
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}
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static void
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ListFloaters(FILE* out, PRInt32 aIndent, nsVoidArray* aFloaters)
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{
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nsAutoString frameName;
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PRInt32 j, i, n = aFloaters->Count();
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for (i = 0; i < n; i++) {
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for (j = aIndent; --j >= 0; ) fputs(" ", out);
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nsPlaceholderFrame* ph = (nsPlaceholderFrame*) aFloaters->ElementAt(i);
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if (nsnull != ph) {
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fprintf(out, "placeholder@%p ", ph);
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nsIFrame* frame = ph->GetAnchoredItem();
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if (nsnull != frame) {
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frame->GetFrameName(frameName);
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fputs(frameName, out);
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}
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fprintf(out, "\n");
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}
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}
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}
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char*
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nsLineBox::StateToString(char* aBuf, PRInt32 aBufSize) const
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{
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PR_snprintf(aBuf, aBufSize, "%s,%s[0x%x]",
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(mState & LINE_IS_DIRTY) ? "dirty" : "clean",
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(mState & LINE_IS_BLOCK) ? "block" : "inline",
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mState);
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return aBuf;
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}
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void
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nsLineBox::List(FILE* out, PRInt32 aIndent) const
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{
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PRInt32 i;
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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char cbuf[100];
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fprintf(out, "line %p: count=%d state=%s ",
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this, ChildCount(), StateToString(cbuf, sizeof(cbuf)));
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#if XXX
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if (0 != mCarriedOutTopMargin) {
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fprintf(out, "tm=%d ", mCarriedOutTopMargin);
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}
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#endif
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if (0 != mCarriedOutBottomMargin) {
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fprintf(out, "bm=%d ", mCarriedOutBottomMargin);
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}
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fprintf(out, "{%d,%d,%d,%d} ca={%d,%d,%d,%d}",
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mBounds.x, mBounds.y, mBounds.width, mBounds.height,
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mCombinedArea.x, mCombinedArea.y,
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mCombinedArea.width, mCombinedArea.height);
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fprintf(out, " <\n");
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nsIFrame* frame = mFirstChild;
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PRInt32 n = ChildCount();
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while (--n >= 0) {
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frame->List(out, aIndent + 1);
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frame->GetNextSibling(&frame);
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}
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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if (nsnull != mFloaters) {
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fputs("> floaters <\n", out);
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ListFloaters(out, aIndent + 1, mFloaters);
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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}
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fputs(">\n", out);
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}
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nsIFrame*
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nsLineBox::LastChild() const
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{
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nsIFrame* frame = mFirstChild;
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PRInt32 n = ChildCount() - 1;
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while (--n >= 0) {
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frame->GetNextSibling(&frame);
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}
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return frame;
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}
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PRBool
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nsLineBox::IsLastChild(nsIFrame* aFrame) const
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{
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nsIFrame* lastFrame = LastChild();
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return aFrame == lastFrame;
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}
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PRBool
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nsLineBox::Contains(nsIFrame* aFrame) const
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{
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PRInt32 n = ChildCount();
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nsIFrame* frame = mFirstChild;
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while (--n >= 0) {
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if (frame == aFrame) {
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return PR_TRUE;
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}
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frame->GetNextSibling(&frame);
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}
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return PR_FALSE;
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}
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#if 0
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static PRInt32
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LengthOf(nsIFrame* aFrame)
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{
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PRInt32 result = 0;
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while (nsnull != aFrame) {
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result++;
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aFrame->GetNextSibling(aFrame);
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}
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return result;
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}
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void
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nsLineBox::Verify()
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{
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nsIFrame* lastFrame = LastChild();
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if (nsnull != lastFrame) {
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nsIFrame* nextInFlow;
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lastFrame->GetNextInFlow(nextInFlow);
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if (nsnull != mNext) {
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nsIFrame* nextSibling;
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lastFrame->GetNextSibling(nextSibling);
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NS_ASSERTION(mNext->mFirstChild == nextSibling, "bad line list");
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}
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}
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PRInt32 len = LengthOf(mFirstChild);
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NS_ASSERTION(len >= ChildCount(), "bad mChildCount");
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}
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static void
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VerifyLines(nsLineBox* aLine)
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{
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while (nsnull != aLine) {
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aLine->Verify();
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aLine = aLine->mNext;
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}
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}
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static void
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VerifyChildCount(nsLineBox* aLines, PRBool aEmptyOK = PR_FALSE)
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{
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if (nsnull != aLines) {
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PRInt32 childCount = LengthOf(aLines->mFirstChild);
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PRInt32 sum = 0;
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nsLineBox* line = aLines;
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while (nsnull != line) {
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if (!aEmptyOK) {
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NS_ASSERTION(0 != line->ChildCount(), "empty line left in line list");
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}
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sum += line->ChildCount();
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line = line->mNext;
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}
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if (sum != childCount) {
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printf("Bad sibling list/line mChildCount's\n");
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nsLineBox* line = aLines;
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while (nsnull != line) {
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line->List(stdout, 1);
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if (nsnull != line->mNext) {
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nsIFrame* lastFrame = line->LastChild();
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if (nsnull != lastFrame) {
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nsIFrame* nextSibling;
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lastFrame->GetNextSibling(nextSibling);
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if (line->mNext->mFirstChild != nextSibling) {
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printf(" [list broken: nextSibling=%p mNext->mFirstChild=%p]\n",
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nextSibling, line->mNext->mFirstChild);
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}
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}
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}
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line = line->mNext;
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}
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NS_ASSERTION(sum == childCount, "bad sibling list/line mChildCount's");
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}
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}
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}
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#endif
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void
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nsLineBox::DeleteLineList(nsIPresContext& aPresContext, nsLineBox* aLine)
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{
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if (nsnull != aLine) {
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// Delete our child frames before doing anything else. In particular
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// we do all of this before our base class releases it's hold on the
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// view.
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for (nsIFrame* child = aLine->mFirstChild; child; ) {
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nsIFrame* nextChild;
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child->GetNextSibling(&nextChild);
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child->DeleteFrame(aPresContext);
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child = nextChild;
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}
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while (nsnull != aLine) {
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nsLineBox* next = aLine->mNext;
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delete aLine;
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aLine = next;
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}
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}
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}
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nsLineBox*
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nsLineBox::LastLine(nsLineBox* aLine)
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{
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if (nsnull != aLine) {
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while (nsnull != aLine->mNext) {
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aLine = aLine->mNext;
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}
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}
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return aLine;
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}
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nsLineBox*
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nsLineBox::FindLineContaining(nsLineBox* aLine, nsIFrame* aFrame)
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{
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while (nsnull != aLine) {
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if (aLine->Contains(aFrame)) {
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return aLine;
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}
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aLine = aLine->mNext;
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}
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return nsnull;
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}
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void
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nsLineBox::UnplaceFloaters(nsISpaceManager* aSpaceManager)
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{
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if (nsnull != mFloaters) {
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PRInt32 i, n = mFloaters->Count();
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for (i = 0; i < n; i++) {
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nsPlaceholderFrame* pf = (nsPlaceholderFrame*) mFloaters->ElementAt(i);
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nsIFrame* floater = pf->GetAnchoredItem();
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aSpaceManager->RemoveRegion(floater);
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}
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}
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}
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#ifdef NS_DEBUG
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PRBool
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nsLineBox::CheckIsBlock() const
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{
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PRBool isBlock = nsLineLayout::TreatFrameAsBlock(mFirstChild);
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return isBlock == IsBlock();
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}
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#endif
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