зеркало из https://github.com/mozilla/pjs.git
160 строки
4.3 KiB
C++
160 строки
4.3 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 "nsHTMLParts.h"
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#include "nsIHTMLContent.h"
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#include "nsFrame.h"
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#include "nsLineLayout.h"
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#include "nsHTMLIIDs.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsHTMLAtoms.h"
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#include "nsUnitConversion.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsINameSpaceManager.h"
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// Spacer type's
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#define TYPE_WORD 0 // horizontal space
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#define TYPE_LINE 1 // line-break + vertical space
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#define TYPE_IMAGE 2 // acts like a sized image with nothing to see
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class SpacerFrame : public nsFrame {
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public:
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// nsIHTMLReflow
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NS_IMETHOD Reflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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PRUint8 GetType();
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protected:
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virtual ~SpacerFrame();
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};
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nsresult
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NS_NewSpacerFrame(nsIFrame*& aResult)
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{
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nsIFrame* frame = new SpacerFrame;
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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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SpacerFrame::~SpacerFrame()
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{
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}
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NS_IMETHODIMP
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SpacerFrame::Reflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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aStatus = NS_FRAME_COMPLETE;
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// By default, we have no area
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aMetrics.width = 0;
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aMetrics.height = 0;
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aMetrics.ascent = 0;
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aMetrics.descent = 0;
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nscoord width = 0;
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nscoord height = 0;
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PRUint8 type = GetType();
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nsresult ca;
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nsIHTMLContent* hc = nsnull;
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mContent->QueryInterface(kIHTMLContentIID, (void**) &hc);
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if (nsnull != hc) {
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if (type != TYPE_IMAGE) {
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nsHTMLValue val;
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ca = hc->GetHTMLAttribute(nsHTMLAtoms::size, val);
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if (NS_CONTENT_ATTR_HAS_VALUE == ca) {
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width = val.GetPixelValue();
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}
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} else {
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nsHTMLValue val;
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ca = hc->GetHTMLAttribute(nsHTMLAtoms::width, val);
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if (NS_CONTENT_ATTR_HAS_VALUE == ca) {
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if (eHTMLUnit_Pixel == val.GetUnit()) {
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width = val.GetPixelValue();
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}
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}
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ca = hc->GetHTMLAttribute(nsHTMLAtoms::height, val);
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if (NS_CONTENT_ATTR_HAS_VALUE == ca) {
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if (eHTMLUnit_Pixel == val.GetUnit()) {
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height = val.GetPixelValue();
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}
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}
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}
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NS_RELEASE(hc);
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}
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float p2t;
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aPresContext.GetScaledPixelsToTwips(&p2t);
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switch (type) {
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case TYPE_WORD:
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if (0 != width) {
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aMetrics.width = NSIntPixelsToTwips(width, p2t);
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}
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break;
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case TYPE_LINE:
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if (0 != width) {
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aStatus = NS_INLINE_LINE_BREAK_AFTER(NS_FRAME_COMPLETE);
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aMetrics.height = NSIntPixelsToTwips(width, p2t);
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aMetrics.ascent = aMetrics.height;
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}
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break;
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case TYPE_IMAGE:
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aMetrics.width = NSIntPixelsToTwips(width, p2t);
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aMetrics.height = NSIntPixelsToTwips(height, p2t);
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aMetrics.ascent = aMetrics.height;
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break;
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}
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if (nsnull != aMetrics.maxElementSize) {
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aMetrics.maxElementSize->width = aMetrics.width;
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aMetrics.maxElementSize->height = aMetrics.height;
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}
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return NS_OK;
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}
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PRUint8
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SpacerFrame::GetType()
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{
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PRUint8 type = TYPE_WORD;
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nsAutoString value;
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// XXX this would be better served by storing as an enumerated value
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if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::type, value)) {
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if (value.EqualsIgnoreCase("line") ||
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value.EqualsIgnoreCase("vert") ||
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value.EqualsIgnoreCase("vertical")) {
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return TYPE_LINE;
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}
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if (value.EqualsIgnoreCase("block")) {
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return TYPE_IMAGE;
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}
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}
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return type;
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}
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