зеркало из https://github.com/mozilla/pjs.git
547 строки
14 KiB
C++
547 строки
14 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations 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
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "nsFrameList.h"
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#ifdef NS_DEBUG
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#include "nsIFrameDebug.h"
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#endif
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#ifdef IBMBIDI
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#include "nsCOMPtr.h"
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#include "nsLayoutAtoms.h"
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#include "nsILineIterator.h"
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#endif // IBMBIDI
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void
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nsFrameList::DestroyFrames(nsIPresContext* aPresContext)
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{
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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nsIFrame* next;
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frame->GetNextSibling(&next);
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frame->Destroy(aPresContext);
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mFirstChild = frame = next;
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}
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}
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void
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nsFrameList::AppendFrames(nsIFrame* aParent, nsIFrame* aFrameList)
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{
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NS_PRECONDITION(nsnull != aFrameList, "null ptr");
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if (nsnull != aFrameList) {
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nsIFrame* lastChild = LastChild();
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if (nsnull == lastChild) {
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mFirstChild = aFrameList;
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}
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else {
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lastChild->SetNextSibling(aFrameList);
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}
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if (nsnull != aParent) {
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nsIFrame* frame = aFrameList;
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while (nsnull != frame) {
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frame->SetParent(aParent);
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frame->GetNextSibling(&frame);
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}
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}
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}
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}
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void
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nsFrameList::AppendFrame(nsIFrame* aParent, nsIFrame* aFrame)
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (nsnull != aFrame) {
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nsIFrame* lastChild = LastChild();
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if (nsnull == lastChild) {
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mFirstChild = aFrame;
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}
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else {
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lastChild->SetNextSibling(aFrame);
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}
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if (nsnull != aParent) {
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aFrame->SetParent(aParent);
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}
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}
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}
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PRBool
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nsFrameList::RemoveFrame(nsIFrame* aFrame)
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (nsnull != aFrame) {
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nsIFrame* nextFrame;
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aFrame->GetNextSibling(&nextFrame);
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aFrame->SetNextSibling(nsnull);
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if (aFrame == mFirstChild) {
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mFirstChild = nextFrame;
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return PR_TRUE;
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}
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else {
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nsIFrame* prevSibling = GetPrevSiblingFor(aFrame);
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if (nsnull != prevSibling) {
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prevSibling->SetNextSibling(nextFrame);
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return PR_TRUE;
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}
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}
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}
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return PR_FALSE;
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}
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PRBool
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nsFrameList::RemoveFirstChild()
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{
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if (nsnull != mFirstChild) {
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nsIFrame* nextFrame;
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mFirstChild->GetNextSibling(&nextFrame);
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mFirstChild->SetNextSibling(nsnull);
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mFirstChild = nextFrame;
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool
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nsFrameList::DestroyFrame(nsIPresContext* aPresContext, nsIFrame* aFrame)
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (RemoveFrame(aFrame)) {
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aFrame->Destroy(aPresContext);
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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void
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nsFrameList::InsertFrame(nsIFrame* aParent,
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nsIFrame* aPrevSibling,
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nsIFrame* aNewFrame)
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{
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NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
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if (nsnull != aNewFrame) {
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if (nsnull == aPrevSibling) {
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aNewFrame->SetNextSibling(mFirstChild);
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mFirstChild = aNewFrame;
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}
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else {
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nsIFrame* nextFrame;
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aPrevSibling->GetNextSibling(&nextFrame);
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aPrevSibling->SetNextSibling(aNewFrame);
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aNewFrame->SetNextSibling(nextFrame);
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}
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if (nsnull != aParent) {
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aNewFrame->SetParent(aParent);
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}
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}
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}
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void
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nsFrameList::InsertFrames(nsIFrame* aParent,
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nsIFrame* aPrevSibling,
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nsIFrame* aFrameList)
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{
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NS_PRECONDITION(nsnull != aFrameList, "null ptr");
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if (nsnull != aFrameList) {
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nsIFrame* lastNewFrame = nsnull;
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if (nsnull != aParent) {
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nsIFrame* frame = aFrameList;
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while (nsnull != frame) {
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frame->SetParent(aParent);
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lastNewFrame = frame;
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frame->GetNextSibling(&frame);
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}
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}
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// Get the last new frame if necessary
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if (!lastNewFrame) {
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nsFrameList tmp(aFrameList);
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lastNewFrame = tmp.LastChild();
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}
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// Link the new frames into the child list
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if (nsnull == aPrevSibling) {
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lastNewFrame->SetNextSibling(mFirstChild);
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mFirstChild = aFrameList;
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}
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else {
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nsIFrame* nextFrame;
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aPrevSibling->GetNextSibling(&nextFrame);
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aPrevSibling->SetNextSibling(aFrameList);
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lastNewFrame->SetNextSibling(nextFrame);
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}
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}
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}
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PRBool
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nsFrameList::ReplaceFrame(nsIFrame* aParent,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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{
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NS_PRECONDITION(nsnull != aOldFrame, "null ptr");
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NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
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if ((nsnull != aOldFrame) && (nsnull != aNewFrame)) {
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nsIFrame* nextFrame;
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aOldFrame->GetNextSibling(&nextFrame);
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if (aOldFrame == mFirstChild) {
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mFirstChild = aNewFrame;
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aNewFrame->SetNextSibling(nextFrame);
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}
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else {
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nsIFrame* prevSibling = GetPrevSiblingFor(aOldFrame);
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if (nsnull != prevSibling) {
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prevSibling->SetNextSibling(aNewFrame);
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aNewFrame->SetNextSibling(nextFrame);
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}
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}
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if (nsnull != aParent) {
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aNewFrame->SetParent(aParent);
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}
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool
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nsFrameList::ReplaceAndDestroyFrame(nsIPresContext* aPresContext,
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nsIFrame* aParent,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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{
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NS_PRECONDITION(nsnull != aOldFrame, "null ptr");
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NS_PRECONDITION(nsnull != aNewFrame, "null ptr");
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if (ReplaceFrame(aParent, aOldFrame, aNewFrame)) {
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aNewFrame->Destroy(aPresContext);
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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PRBool
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nsFrameList::Split(nsIFrame* aAfterFrame, nsIFrame** aNextFrameResult)
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{
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NS_PRECONDITION(nsnull != aAfterFrame, "null ptr");
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NS_PRECONDITION(nsnull != aNextFrameResult, "null ptr");
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NS_ASSERTION(ContainsFrame(aAfterFrame), "split after unknown frame");
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if ((nsnull != aNextFrameResult) && (nsnull != aAfterFrame)) {
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nsIFrame* nextFrame;
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aAfterFrame->GetNextSibling(&nextFrame);
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aAfterFrame->SetNextSibling(nsnull);
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*aNextFrameResult = nextFrame;
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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nsIFrame*
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nsFrameList::PullFrame(nsIFrame* aParent,
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nsIFrame* aLastChild,
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nsFrameList& aFromList)
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{
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NS_PRECONDITION(nsnull != aParent, "null ptr");
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nsIFrame* pulledFrame = nsnull;
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if (nsnull != aParent) {
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pulledFrame = aFromList.FirstChild();
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if (nsnull != pulledFrame) {
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// Take frame off old list
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aFromList.RemoveFirstChild();
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// Put it on the end of this list
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if (nsnull == aLastChild) {
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NS_ASSERTION(nsnull == mFirstChild, "bad aLastChild");
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mFirstChild = pulledFrame;
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}
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else {
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aLastChild->SetNextSibling(pulledFrame);
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}
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pulledFrame->SetParent(aParent);
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}
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}
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return pulledFrame;
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}
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nsIFrame*
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nsFrameList::LastChild() const
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{
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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nsIFrame* next;
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frame->GetNextSibling(&next);
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if (nsnull == next) {
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break;
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}
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frame = next;
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}
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return frame;
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}
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nsIFrame*
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nsFrameList::FrameAt(PRInt32 aIndex) const
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{
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NS_PRECONDITION(aIndex >= 0, "invalid arg");
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if (aIndex < 0) return nsnull;
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nsIFrame* frame = mFirstChild;
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while ((aIndex-- > 0) && (nsnull != frame)) {
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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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nsFrameList::ContainsFrame(const nsIFrame* aFrame) const
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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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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PRInt32
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nsFrameList::GetLength() const
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{
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PRInt32 count = 0;
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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count++;
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frame->GetNextSibling(&frame);
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}
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return count;
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}
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nsIFrame*
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nsFrameList::GetPrevSiblingFor(nsIFrame* aFrame) const
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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if (aFrame == mFirstChild) {
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return nsnull;
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}
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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nsIFrame* next;
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frame->GetNextSibling(&next);
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if (next == aFrame) {
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break;
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}
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frame = next;
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}
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return frame;
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}
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void
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nsFrameList::VerifyParent(nsIFrame* aParent) const
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{
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#ifdef NS_DEBUG
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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nsIFrame* parent;
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frame->GetParent(&parent);
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NS_ASSERTION(parent == aParent, "bad parent");
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frame->GetNextSibling(&frame);
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}
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#endif
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}
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#ifdef NS_DEBUG
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void
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nsFrameList::List(nsIPresContext* aPresContext, FILE* out) const
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{
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fputs("<\n", out);
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nsIFrame* frame = mFirstChild;
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while (nsnull != frame) {
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nsIFrameDebug* frameDebug;
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if (NS_SUCCEEDED(frame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
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frameDebug->List(aPresContext, out, 1);
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}
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frame->GetNextSibling(&frame);
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}
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fputs(">\n", out);
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}
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#endif
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#ifdef IBMBIDI
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nsIFrame*
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nsFrameList::GetPrevVisualFor(nsIFrame* aFrame) const
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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nsILineIterator* iter;
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nsCOMPtr<nsIAtom>atom;
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aFrame->GetFrameType(getter_AddRefs(atom));
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if (atom.get() == nsLayoutAtoms::blockFrame)
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return GetPrevSiblingFor(aFrame);
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nsRect tempRect;
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nsIFrame* blockFrame;
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nsIFrame* frame;
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nsIFrame* furthestFrame = nsnull;
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frame = mFirstChild;
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nsresult result = aFrame->GetParent(&blockFrame);
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if (NS_FAILED(result) || !blockFrame)
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return GetPrevSiblingFor(aFrame);
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result = blockFrame->QueryInterface(NS_GET_IID(nsILineIterator), (void**)&iter);
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if (NS_FAILED(result) || !iter) { // If the parent is not a block frame, just check all the siblings
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PRInt32 maxX, limX;
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maxX = -0x7fffffff;
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aFrame->GetRect(tempRect);
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limX = tempRect.x;
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while (frame) {
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frame->GetRect(tempRect);
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if (tempRect.x > maxX && tempRect.x < limX) { // we are looking for the highest value less than the current one
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maxX = tempRect.x;
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furthestFrame = frame;
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}
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frame->GetNextSibling(&frame);
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}
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return furthestFrame;
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}
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// Otherwise use the LineIterator to check the siblings on this line and the previous line
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if (!blockFrame || !iter)
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return nsnull;
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PRInt64 maxOrig, limOrig, testOrig;
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PRInt32 testLine, thisLine;
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PRInt64 tmp64;
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maxOrig = LL_MININT;
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aFrame->GetRect(tempRect);
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result = iter->FindLineContaining(aFrame, &thisLine);
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if (NS_FAILED(result) || thisLine < 0)
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return nsnull;
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LL_I2L(tmp64, thisLine);
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LL_SHL(limOrig, tmp64, 32);
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LL_I2L(tmp64, tempRect.x);
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LL_OR2(limOrig, tmp64);
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while (frame) {
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if (NS_SUCCEEDED(iter->FindLineContaining(frame, &testLine))
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&& testLine >= 0
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&& (testLine == thisLine || testLine == thisLine - 1)) {
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frame->GetRect(tempRect);
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LL_I2L(tmp64, testLine);
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LL_SHL(testOrig, tmp64, 32);
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LL_I2L(tmp64, tempRect.x);
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LL_OR2(testOrig, tmp64);
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if (LL_CMP(testOrig, >, maxOrig) && LL_CMP(testOrig, <, limOrig)) { // we are looking for the highest value less than the current one
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maxOrig = testOrig;
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furthestFrame = frame;
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}
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}
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frame->GetNextSibling(&frame);
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}
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return furthestFrame;
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}
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nsIFrame*
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nsFrameList::GetNextVisualFor(nsIFrame* aFrame) const
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{
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NS_PRECONDITION(nsnull != aFrame, "null ptr");
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nsILineIterator* iter;
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nsCOMPtr<nsIAtom>atom;
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aFrame->GetFrameType(getter_AddRefs(atom));
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if (atom.get() == nsLayoutAtoms::blockFrame) {
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nsIFrame* frame;
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aFrame->GetNextSibling(&frame);
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return frame;
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}
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nsRect tempRect;
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nsIFrame* blockFrame;
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nsIFrame* frame;
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nsIFrame* nearestFrame = nsnull;
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frame = mFirstChild;
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nsresult result = aFrame->GetParent(&blockFrame);
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if (NS_FAILED(result) || !blockFrame)
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return GetPrevSiblingFor(aFrame);
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result = blockFrame->QueryInterface(NS_GET_IID(nsILineIterator), (void**)&iter);
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if (NS_FAILED(result) || !iter) { // If the parent is not a block frame, just check all the siblings
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PRInt32 minX, limX;
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minX = 0x7fffffff;
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aFrame->GetRect(tempRect);
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limX = tempRect.x;
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while (frame) {
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frame->GetRect(tempRect);
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if (tempRect.x < minX && tempRect.x > limX) { // we are looking for the lowest value greater than the current one
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minX = tempRect.x;
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nearestFrame = frame;
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}
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frame->GetNextSibling(&frame);
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}
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return nearestFrame;
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}
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// Otherwise use the LineIterator to check the siblings on this line and the previous line
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if (!blockFrame || !iter)
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return nsnull;
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PRInt64 minOrig, limOrig, testOrig;
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PRInt32 testLine, thisLine;
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minOrig = LL_MAXINT;
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aFrame->GetRect(tempRect);
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result = iter->FindLineContaining(aFrame, &thisLine);
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if (NS_FAILED(result) || thisLine < 0)
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return nsnull;
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PRInt64 tmp64;
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LL_I2L(tmp64, thisLine);
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LL_SHL(limOrig, tmp64, 32);
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LL_I2L(tmp64, tempRect.x);
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LL_OR2(limOrig, tmp64);
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while (frame) {
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if (NS_SUCCEEDED(iter->FindLineContaining(frame, &testLine))
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&& testLine >= 0
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&& (testLine == thisLine || testLine == thisLine + 1)) {
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frame->GetRect(tempRect);
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LL_I2L(tmp64, testLine);
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LL_SHL(testOrig, tmp64, 32);
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LL_I2L(tmp64, tempRect.x);
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LL_OR2(testOrig, tmp64);
|
|
if (LL_CMP(testOrig, <, minOrig) && LL_CMP(testOrig, >, limOrig)) { // we are looking for the lowest value greater than the current one
|
|
minOrig = testOrig;
|
|
nearestFrame = frame;
|
|
}
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
return nearestFrame;
|
|
}
|
|
#endif
|