зеркало из https://github.com/mozilla/gecko-dev.git
142 строки
4.2 KiB
C++
142 строки
4.2 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 "nsHTMLIIDs.h"
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#include "nsIPresContext.h"
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#include "nsIInlineReflow.h"
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#include "nsLineLayout.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, public nsIInlineReflow {
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public:
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BRFrame(nsIContent* aContent, nsIFrame* aParentFrame);
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// nsISupports
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
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// nsIFrame
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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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// nsIInlineReflow
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NS_IMETHOD FindTextRuns(nsLineLayout& aLineLayout,
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nsIReflowCommand* aReflowCommand);
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NS_IMETHOD InlineReflow(nsLineLayout& aLineLayout,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState);
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protected:
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virtual ~BRFrame();
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};
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nsresult
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NS_NewBRFrame(nsIContent* aContent, nsIFrame* aParentFrame,
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nsIFrame*& aResult)
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{
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nsIFrame* frame = new BRFrame(aContent, 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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aResult = frame;
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return NS_OK;
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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_IMETHODIMP
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BRFrame::QueryInterface(REFNSIID aIID, void** aInstancePtrResult)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null pointer");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(kIInlineReflowIID)) {
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*aInstancePtrResult = (void*) ((nsIInlineReflow*)this);
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return NS_OK;
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}
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return nsFrame::QueryInterface(aIID, aInstancePtrResult);
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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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float p2t = aPresContext.GetPixelsToTwips();
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aRenderingContext.SetColor(NS_RGB(0, 255, 255));
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aRenderingContext.FillRect(0, 0, NSIntPixelsToTwips(5, p2t), mRect.height);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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BRFrame::FindTextRuns(nsLineLayout& aLineLayout,
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nsIReflowCommand* aReflowCommand)
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{
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aLineLayout.EndTextRun();
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return NS_OK;
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}
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NS_IMETHODIMP
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BRFrame::InlineReflow(nsLineLayout& aLineLayout,
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nsReflowMetrics& aMetrics,
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const nsReflowState& aReflowState)
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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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const nsStyleFont* font = (const nsStyleFont*)
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mStyleContext->GetStyleData(eStyleStruct_Font);
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nsIFontMetrics* fm = aLineLayout.mPresContext.GetMetricsFor(font->mFont);
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fm->GetMaxAscent(aMetrics.ascent);
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fm->GetMaxDescent(aMetrics.descent);
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aMetrics.height = aMetrics.ascent + aMetrics.descent;
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aMetrics.width = 0;
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NS_RELEASE(fm);
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// Return our inline reflow status
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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PRUint32 breakType = display->mBreakType;
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if (NS_STYLE_CLEAR_NONE == breakType) {
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breakType = NS_STYLE_CLEAR_LINE;
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}
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return NS_INLINE_BREAK | NS_INLINE_BREAK_AFTER |
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NS_INLINE_MAKE_BREAK_TYPE(breakType);
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}
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