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320 lines
10 KiB
C++
320 lines
10 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 "nsHTMLContainerFrame.h"
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#include "nsIRenderingContext.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsCSSRendering.h"
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#include "nsIContent.h"
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#include "nsHTMLAtoms.h"
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#include "nsIWidget.h"
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#include "nsILinkHandler.h"
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#include "nsHTMLValue.h"
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#include "nsGUIEvent.h"
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#include "nsIDocument.h"
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#include "nsIURL.h"
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#include "nsIPtr.h"
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#include "nsAbsoluteFrame.h"
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#include "nsPlaceholderFrame.h"
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#include "nsIHTMLContent.h"
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#include "nsHTMLParts.h"
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#include "nsHTMLBase.h"
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#include "nsScrollFrame.h"
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#include "nsIView.h"
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#include "nsIReflowCommand.h"
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NS_DEF_PTR(nsIStyleContext);
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nsHTMLContainerFrame::nsHTMLContainerFrame(nsIContent* aContent, nsIFrame* aParent)
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: nsContainerFrame(aContent, aParent)
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{
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}
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nsHTMLContainerFrame::~nsHTMLContainerFrame()
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{
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}
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NS_METHOD nsHTMLContainerFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect)
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{
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// Paint our background and border
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const nsStyleDisplay* disp =
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(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
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if (disp->mVisible && mRect.width && mRect.height) {
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PRIntn skipSides = GetSkipSides();
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const nsStyleColor* color =
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(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
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const nsStyleSpacing* spacing =
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(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
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nsRect rect(0, 0, mRect.width, mRect.height);
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nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *color);
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nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
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aDirtyRect, rect, *spacing, skipSides);
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}
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PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
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if (nsIFrame::GetShowFrameBorders()) {
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nsIView* view;
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GetView(view);
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if (nsnull != view) {
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aRenderingContext.SetColor(NS_RGB(0,0,255));
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}
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else {
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aRenderingContext.SetColor(NS_RGB(255,0,0));
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}
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aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
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}
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return NS_OK;
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}
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NS_METHOD nsHTMLContainerFrame::HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus)
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{
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return nsContainerFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
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}
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NS_METHOD nsHTMLContainerFrame::GetCursorAndContentAt(nsIPresContext& aPresContext,
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const nsPoint& aPoint,
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nsIFrame** aFrame,
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nsIContent** aContent,
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PRInt32& aCursor)
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{
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// Set content here, child will override if found.
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*aContent = mContent;
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// Get my cursor
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const nsStyleColor* styleColor = (const nsStyleColor*)
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mStyleContext->GetStyleData(eStyleStruct_Color);
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PRInt32 myCursor = styleColor->mCursor;
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// Get child's cursor, if any
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nsContainerFrame::GetCursorAndContentAt(aPresContext, aPoint, aFrame, aContent, aCursor);
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if (aCursor != NS_STYLE_CURSOR_INHERIT) {
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nsIAtom* tag;
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mContent->GetTag(tag);
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if (nsHTMLAtoms::a == tag) {
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// Anchor tags override their child cursors in some cases.
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if ((NS_STYLE_CURSOR_IBEAM == aCursor) &&
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(NS_STYLE_CURSOR_INHERIT != myCursor)) {
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aCursor = myCursor;
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}
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}
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NS_RELEASE(tag);
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return NS_OK;
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}
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if (NS_STYLE_CURSOR_INHERIT != myCursor) {
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// If this container has a particular cursor, use it, otherwise
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// let the child decide.
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*aFrame = this;
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aCursor = myCursor;
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return NS_OK;
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}
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// No specific cursor for us
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aCursor = NS_STYLE_CURSOR_INHERIT;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLContainerFrame::ContentDeleted(nsIPresShell* aShell,
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nsIPresContext* aPresContext,
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nsIContent* aContainer,
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nsIContent* aChild,
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PRInt32 aIndexInParent)
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{
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NS_ASSERTION(!IsPseudoFrame(), "pseudos not supported here");
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// Find the frame that precedes the deletion point
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nsHTMLContainerFrame* flow;
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nsIFrame* deadFrame;
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nsIFrame* prevSibling;
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if (aIndexInParent > 0) {
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nsIContent* precedingContent;
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aContainer->ChildAt(aIndexInParent - 1, precedingContent);
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prevSibling = aShell->FindFrameWithContent(precedingContent);
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NS_RELEASE(precedingContent);
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// The frame may have a next-in-flow. Get the last-in-flow
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nsIFrame* nextInFlow;
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do {
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prevSibling->GetNextInFlow(nextInFlow);
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if (nsnull != nextInFlow) {
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prevSibling = nextInFlow;
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}
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} while (nsnull != nextInFlow);
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// Get the dead frame (maybe)
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prevSibling->GetGeometricParent((nsIFrame*&)flow);
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prevSibling->GetNextSibling(deadFrame);
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if (nsnull == deadFrame) {
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// The deadFrame must be prevSibling's parent's next-in-flows
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// first frame. Therefore it doesn't have a prevSibling.
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flow = (nsHTMLContainerFrame*) flow->mNextInFlow;
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if (nsnull != flow) {
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deadFrame = flow->mFirstChild;
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}
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prevSibling = nsnull;
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}
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}
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else {
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prevSibling = nsnull;
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flow = this;
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deadFrame = flow->mFirstChild;
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}
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NS_ASSERTION(nsnull != deadFrame, "yikes! couldn't find frame");
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if (nsnull == deadFrame) {
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return NS_OK;
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}
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// Generate a reflow command
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nsIReflowCommand* cmd;
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nsresult rv = NS_NewHTMLReflowCommand(&cmd, flow,
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nsIReflowCommand::FrameDeleted);
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if (NS_OK != rv) {
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return rv;
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}
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aShell->AppendReflowCommand(cmd);
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NS_RELEASE(cmd);
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// Take the frame away; Note that we also have to take away any
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// continuations so we loop here until deadFrame is nsnull.
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while (nsnull != deadFrame) {
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// If the last frame for the flow is the frame we are deleting
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// then the flow will become complete.
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if (!flow->mLastContentIsComplete) {
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nsIFrame* lastFrame;
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flow->LastChild(lastFrame);
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if (lastFrame == deadFrame) {
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flow->mLastContentIsComplete = PR_TRUE;
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}
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}
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// Remove frame from sibling list
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nsIFrame* nextSib;
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deadFrame->GetNextSibling(nextSib);
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if (nsnull != prevSibling) {
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prevSibling->SetNextSibling(nextSib);
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}
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else {
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flow->mFirstChild = nextSib;
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}
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// Update flows child count and last-content-offset. Note that
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// only the last content needs updating when a deadFrame is
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// removed from flow (because only the children that follow the
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// deletion need renumbering).
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flow->mChildCount--;
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flow->mLastContentOffset--;
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// Break frame out of its flow and then destroy it
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nsIFrame* nextInFlow;
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deadFrame->GetNextInFlow(nextInFlow);
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deadFrame->BreakFromNextFlow();
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deadFrame->DeleteFrame(*aPresContext);
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deadFrame = nextInFlow;
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if (nsnull != deadFrame) {
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// Get the parent of deadFrame's continuation
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deadFrame->GetGeometricParent((nsIFrame*&) flow);
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// When we move to a next-in-flow then the deadFrame will be the
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// first child of the new parent. Therefore we know that
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// prevSibling will be null.
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prevSibling = nsnull;
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}
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}
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// Repair any remaining next-in-flows content offsets; these are the
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// next-in-flows the follow the last flow container that contained
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// one of the deadFrame's. Therefore both content offsets need
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// updating (because all the children are following the deletion).
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flow = (nsHTMLContainerFrame*) flow->mNextInFlow;
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while (nsnull != flow) {
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flow->mFirstContentOffset--;
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flow->mLastContentOffset--;
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flow = (nsHTMLContainerFrame*) flow->mNextInFlow;
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}
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return rv;
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}
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nsresult
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nsHTMLContainerFrame::ProcessInitialReflow(nsIPresContext* aPresContext)
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{
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if (nsnull == mPrevInFlow) {
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
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("nsHTMLContainerFrame::ProcessInitialReflow: display=%d",
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display->mDisplay));
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if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
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// This container is a list-item container. Therefore it needs a
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// bullet content object.
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nsIHTMLContent* bullet;
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nsresult rv = NS_NewHTMLBullet(&bullet);
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if (NS_OK != rv) {
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return rv;
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}
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// Insert the bullet. Do not allow an incremental reflow operation
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// to occur.
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mContent->InsertChildAt(bullet, 0, PR_FALSE);
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}
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}
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return NS_OK;
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}
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PRBool
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nsHTMLContainerFrame::DeleteNextInFlowsFor(nsIPresContext& aPresContext,
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nsIFrame* aChild)
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{
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// XXX get rid of this sillyness
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NS_NOTREACHED("subclass should've overriden this!");
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return PR_TRUE;
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}
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nsPlaceholderFrame*
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nsHTMLContainerFrame::CreatePlaceholderFrame(nsIPresContext* aPresContext,
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nsIFrame* aFloatedFrame)
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{
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nsIContent* content;
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aFloatedFrame->GetContent(content);
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nsPlaceholderFrame* placeholder;
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nsPlaceholderFrame::NewFrame((nsIFrame**)&placeholder, content, this, aFloatedFrame);
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NS_IF_RELEASE(content);
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// Let the placeholder share the same style context as the floated element
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nsIStyleContext* kidSC;
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aFloatedFrame->GetStyleContext(aPresContext, kidSC);
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placeholder->SetStyleContext(aPresContext, kidSC);
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NS_RELEASE(kidSC);
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return placeholder;
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}
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