324 lines
9.1 KiB
C++
324 lines
9.1 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 "nsHTMLTagContent.h"
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#include "nsFrame.h"
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#include "nsIInlineReflow.h"
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#include "nsCSSLineLayout.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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// 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, private nsIInlineReflow {
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public:
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SpacerFrame(nsIContent* aContent, nsIFrame* aParentFrame);
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// nsISupports
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
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// nsIInlineReflow
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NS_IMETHOD FindTextRuns(nsCSSLineLayout& aLineLayout,
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nsIReflowCommand* aReflowCommand);
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NS_IMETHOD InlineReflow(nsCSSLineLayout& aLineLayout,
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nsReflowMetrics& aDesiredSize,
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const nsReflowState& aReflowState);
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protected:
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virtual ~SpacerFrame();
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};
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class SpacerPart : public nsHTMLTagContent {
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public:
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SpacerPart(nsIAtom* aTag);
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NS_IMETHOD 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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NS_IMETHOD SetAttribute(nsIAtom* aAttribute, const nsString& aValue,
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PRBool aNotify);
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NS_IMETHOD MapAttributesInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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NS_IMETHOD AttributeToString(nsIAtom* aAttribute,
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nsHTMLValue& aValue,
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nsString& aResult) const;
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PRUint8 GetType();
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protected:
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virtual ~SpacerPart();
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};
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//----------------------------------------------------------------------
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SpacerFrame::SpacerFrame(nsIContent* aContent, nsIFrame* aParentFrame)
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: nsFrame(aContent, aParentFrame)
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{
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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::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_IMETHODIMP
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SpacerFrame::InlineReflow(nsCSSLineLayout& aLineLayout,
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nsReflowMetrics& aMetrics,
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const nsReflowState& aReflowState)
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{
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nsresult rv = 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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SpacerPart* part = (SpacerPart*) mContent;/* XXX decouple */
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PRUint8 type = part->GetType();
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nsresult ca;
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if (type != TYPE_IMAGE) {
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nsHTMLValue val;
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ca = part->GetAttribute(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 = part->GetAttribute(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 = part->GetAttribute(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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float p2t = aLineLayout.mPresContext->GetPixelsToTwips();
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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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rv = NS_INLINE_LINE_BREAK_AFTER(0);
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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 rv;
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}
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NS_IMETHODIMP
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SpacerFrame::FindTextRuns(nsCSSLineLayout& 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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//----------------------------------------------------------------------
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SpacerPart::SpacerPart(nsIAtom* aTag)
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: nsHTMLTagContent(aTag)
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{
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}
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SpacerPart::~SpacerPart()
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{
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}
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nsresult
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SpacerPart::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 SpacerFrame(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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PRUint8
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SpacerPart::GetType()
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{
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PRUint8 type = TYPE_WORD;
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nsHTMLValue value;
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if (NS_CONTENT_ATTR_HAS_VALUE ==
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nsHTMLTagContent::GetAttribute(nsHTMLAtoms::type, value)) {
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if (eHTMLUnit_Enumerated == value.GetUnit()) {
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type = value.GetIntValue();
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}
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}
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return type;
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}
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static nsHTMLTagContent::EnumTable kTypeTable[] = {
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{ "line", TYPE_LINE },
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{ "vert", TYPE_LINE },
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{ "vertical", TYPE_LINE },
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{ "block", TYPE_IMAGE },
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{ 0 }
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};
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NS_IMETHODIMP
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SpacerPart::SetAttribute(nsIAtom* aAttribute, const nsString& aValue,
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PRBool aNotify)
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{
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nsHTMLValue val;
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if (aAttribute == nsHTMLAtoms::type) {
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if (ParseEnumValue(aValue, kTypeTable, val)) {
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return nsHTMLTagContent::SetAttribute(aAttribute, val, aNotify);
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}
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}
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else if (aAttribute == nsHTMLAtoms::size) {
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ParseValue(aValue, 0, val, eHTMLUnit_Pixel);
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return nsHTMLTagContent::SetAttribute(aAttribute, val, aNotify);
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}
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else if (aAttribute == nsHTMLAtoms::align) {
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ParseAlignParam(aValue, val);
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return nsHTMLTagContent::SetAttribute(aAttribute, val, aNotify);
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}
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else if ((aAttribute == nsHTMLAtoms::width) ||
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(aAttribute == nsHTMLAtoms::height)) {
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ParseValueOrPercent(aValue, val, eHTMLUnit_Pixel);
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return nsHTMLTagContent::SetAttribute(aAttribute, val, aNotify);
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}
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return nsHTMLTagContent::SetAttribute(aAttribute, aValue, aNotify);
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}
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NS_IMETHODIMP
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SpacerPart::MapAttributesInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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if (nsnull != mAttributes) {
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nsHTMLValue value;
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nsStyleDisplay* display = (nsStyleDisplay*)
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aContext->GetMutableStyleData(eStyleStruct_Display);
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GetAttribute(nsHTMLAtoms::align, value);
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if (eHTMLUnit_Enumerated == value.GetUnit()) {
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switch (value.GetIntValue()) {
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case NS_STYLE_TEXT_ALIGN_LEFT:
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display->mFloats = NS_STYLE_FLOAT_LEFT;
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break;
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case NS_STYLE_TEXT_ALIGN_RIGHT:
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display->mFloats = NS_STYLE_FLOAT_RIGHT;
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break;
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default:
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break;
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}
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}
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PRUint8 type = GetType();
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switch (type) {
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case TYPE_WORD:
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case TYPE_IMAGE:
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break;
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case TYPE_LINE:
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// This is not strictly 100% compatible: if the spacer is given
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// a width of zero then it is basically ignored.
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display->mDisplay = NS_STYLE_DISPLAY_BLOCK;
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break;
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}
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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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SpacerPart::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::align) {
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if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
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EnumValueToString(aValue, kTypeTable, aResult);
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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}
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else if (aAttribute == nsHTMLAtoms::type) {
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if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
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AlignParamToString(aValue, aResult);
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return NS_CONTENT_ATTR_HAS_VALUE;
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}
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}
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return NS_CONTENT_ATTR_NOT_THERE;
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}
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nsresult
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NS_NewHTMLSpacer(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 SpacerPart(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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