260 lines
7.8 KiB
C++
260 lines
7.8 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 "nsFrame.h"
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#include "nsHTMLParts.h"
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#include "nsHTMLTagContent.h"
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#include "nsHTMLIIDs.h"
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#include "nsIPresContext.h"
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#include "nsBlockFrame.h"
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#include "nsStyleConsts.h"
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#include "nsHTMLAtoms.h"
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#include "nsIStyleContext.h"
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#include "nsIFontMetrics.h"
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#include "nsIRenderingContext.h"
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class BRFrame : public nsFrame
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{
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public:
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BRFrame(nsIContent* aContent, nsIFrame* aParentFrame);
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NS_IMETHOD Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect);
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NS_IMETHOD Reflow(nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD GetReflowMetrics(nsIPresContext* aPresContext,
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nsReflowMetrics& aMetrics);
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protected:
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virtual ~BRFrame();
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};
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BRFrame::BRFrame(nsIContent* aContent,
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nsIFrame* aParentFrame)
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: nsFrame(aContent, aParentFrame)
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{
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}
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BRFrame::~BRFrame()
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{
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}
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NS_METHOD
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BRFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect)
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{
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if (nsIFrame::GetShowFrameBorders()) {
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nsStyleColor* color = (nsStyleColor*)
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mStyleContext->GetData(eStyleStruct_Color);
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float p2t = aPresContext.GetPixelsToTwips();
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aRenderingContext.SetColor(color->mColor);
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aRenderingContext.FillRect(0, 0, nscoord(5 * p2t), mRect.height);
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}
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return NS_OK;
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}
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NS_METHOD
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BRFrame::GetReflowMetrics(nsIPresContext* aPresContext,
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nsReflowMetrics& aMetrics)
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{
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if (nsnull != aMetrics.maxElementSize) {
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aMetrics.maxElementSize->width = 0;
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aMetrics.maxElementSize->height = 0;
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}
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// We have no width, but we're the height of the default font
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nsStyleFont* font =
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(nsStyleFont*)mStyleContext->GetData(eStyleStruct_Font);
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nsIFontMetrics* fm = aPresContext->GetMetricsFor(font->mFont);
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aMetrics.width = 0;
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if (nsIFrame::GetShowFrameBorders()) {
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// Reserve a tiny bit of space so that our frame won't be zero
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// sized so we get a chance to paint.
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aMetrics.width = 1;
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}
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aMetrics.height = fm->GetHeight();
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aMetrics.ascent = fm->GetMaxAscent();
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aMetrics.descent = fm->GetMaxDescent();
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NS_RELEASE(fm);
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// Get cached state for containing block frame
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nsBlockReflowState* state =
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nsBlockFrame::FindBlockReflowState(aPresContext, this);
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if (nsnull != state) {
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nsLineLayout* lineLayoutState = state->mCurrentLine;
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if (nsnull != lineLayoutState) {
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lineLayoutState->mReflowResult =
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NS_LINE_LAYOUT_REFLOW_RESULT_BREAK_AFTER;
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nsStyleDisplay* display = (nsStyleDisplay*)
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mStyleContext->GetData(eStyleStruct_Display);
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lineLayoutState->mPendingBreak = display->mBreakType;
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if (NS_STYLE_CLEAR_NONE == lineLayoutState->mPendingBreak) {
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lineLayoutState->mPendingBreak = NS_STYLE_CLEAR_LINE;
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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_METHOD
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BRFrame::Reflow(nsIPresContext* aPresContext,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aMaxSize,
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nsReflowStatus& aStatus)
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{
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GetReflowMetrics(aPresContext, aDesiredSize);
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aStatus = NS_FRAME_COMPLETE;
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// Get cached state for containing block frame
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nsBlockReflowState* state =
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nsBlockFrame::FindBlockReflowState(aPresContext, this);
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if (nsnull != state) {
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nsLineLayout* lineLayoutState = state->mCurrentLine;
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if (nsnull != lineLayoutState) {
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lineLayoutState->mReflowResult =
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NS_LINE_LAYOUT_REFLOW_RESULT_BREAK_AFTER;
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nsStyleDisplay* display = (nsStyleDisplay*)
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mStyleContext->GetData(eStyleStruct_Display);
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lineLayoutState->mPendingBreak = display->mBreakType;
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if (NS_STYLE_CLEAR_NONE == lineLayoutState->mPendingBreak) {
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lineLayoutState->mPendingBreak = NS_STYLE_CLEAR_LINE;
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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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//----------------------------------------------------------------------
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class BRPart : public nsHTMLTagContent {
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public:
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BRPart(nsIAtom* aTag);
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virtual void SetAttribute(nsIAtom* aAttribute, const nsString& aValue);
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virtual void MapAttributesInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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virtual nsresult CreateFrame(nsIPresContext* aPresContext,
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nsIFrame* aParentFrame,
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nsIStyleContext* aStyleContext,
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nsIFrame*& aResult);
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protected:
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virtual ~BRPart();
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virtual nsContentAttr AttributeToString(nsIAtom* aAttribute,
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nsHTMLValue& aValue,
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nsString& aResult) const;
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};
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BRPart::BRPart(nsIAtom* aTag)
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: nsHTMLTagContent(aTag)
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{
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}
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BRPart::~BRPart()
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{
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}
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nsresult
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BRPart::CreateFrame(nsIPresContext* aPresContext,
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nsIFrame* aParentFrame,
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nsIStyleContext* aStyleContext,
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nsIFrame*& aResult)
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{
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nsIFrame* frame = new BRFrame(this, aParentFrame);
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if (nsnull == frame) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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frame->SetStyleContext(aPresContext, aStyleContext);
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aResult = frame;
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return NS_OK;
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}
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static nsHTMLTagContent::EnumTable kClearTable[] = {
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{ "left", NS_STYLE_CLEAR_LEFT },
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{ "right", NS_STYLE_CLEAR_RIGHT },
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{ "all", NS_STYLE_CLEAR_LEFT_AND_RIGHT },
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{ "both", NS_STYLE_CLEAR_LEFT_AND_RIGHT },
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{ 0 }
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};
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void
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BRPart::SetAttribute(nsIAtom* aAttribute, const nsString& aString)
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{
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if (aAttribute == nsHTMLAtoms::clear) {
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nsHTMLValue value;
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if (ParseEnumValue(aString, kClearTable, value)) {
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nsHTMLTagContent::SetAttribute(aAttribute, value);
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}
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return;
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}
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nsHTMLTagContent::SetAttribute(aAttribute, aString);
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}
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void
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BRPart::MapAttributesInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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if (nsnull != mAttributes) {
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nsStyleDisplay* display = (nsStyleDisplay*)
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aContext->GetData(eStyleStruct_Display);
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nsHTMLValue value;
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GetAttribute(nsHTMLAtoms::clear, value);
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if (value.GetUnit() == eHTMLUnit_Enumerated) {
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display->mBreakType = value.GetIntValue();
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}
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}
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}
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nsContentAttr
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BRPart::AttributeToString(nsIAtom* aAttribute,
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nsHTMLValue& aValue,
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nsString& aResult) const
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{
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if (aAttribute == nsHTMLAtoms::clear) {
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if ((eHTMLUnit_Enumerated == aValue.GetUnit()) &&
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(NS_STYLE_CLEAR_NONE != aValue.GetIntValue())) {
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EnumValueToString(aValue, kClearTable, aResult);
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return eContentAttr_HasValue;
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}
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}
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return eContentAttr_NotThere;
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}
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//----------------------------------------------------------------------
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nsresult
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NS_NewHTMLBreak(nsIHTMLContent** aInstancePtrResult, nsIAtom* aTag)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIHTMLContent* it = new BRPart(aTag);
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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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return it->QueryInterface(kIHTMLContentIID, (void**) aInstancePtrResult);
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}
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