mirror of
https://github.com/mozilla/gecko-dev.git
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671 lines
18 KiB
C++
671 lines
18 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 "nsIHTMLCSSStyleSheet.h"
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#include "nsIArena.h"
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#include "nsCRT.h"
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#include "nsIAtom.h"
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#include "nsIURL.h"
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#include "nsISupportsArray.h"
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#include "nsHTMLAtoms.h"
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#include "nsIHTMLContent.h"
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#include "nsIStyleRule.h"
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#include "nsIFrame.h"
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#include "nsHTMLIIDs.h"
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#include "nsICSSStyleRule.h"
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#include "nsIStyleContext.h"
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#include "nsIPresContext.h"
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#include "nsIDocument.h"
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static NS_DEFINE_IID(kIHTMLCSSStyleSheetIID, NS_IHTML_CSS_STYLE_SHEET_IID);
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static NS_DEFINE_IID(kIStyleSheetIID, NS_ISTYLE_SHEET_IID);
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static NS_DEFINE_IID(kICSSStyleRuleIID, NS_ICSS_STYLE_RULE_IID);
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static NS_DEFINE_IID(kIStyleRuleIID, NS_ISTYLE_RULE_IID);
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class CSSFirstLineRule : public nsIStyleRule {
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public:
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CSSFirstLineRule(nsIHTMLCSSStyleSheet* aSheet);
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virtual ~CSSFirstLineRule();
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NS_DECL_ISUPPORTS
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NS_IMETHOD Equals(const nsIStyleRule* aRule, PRBool& aValue) const;
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NS_IMETHOD HashValue(PRUint32& aValue) const;
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NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const;
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NS_IMETHOD GetStrength(PRInt32& aStrength) const;
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NS_IMETHOD MapStyleInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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NS_IMETHOD MapFontStyleInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
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nsIHTMLCSSStyleSheet* mSheet;
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};
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CSSFirstLineRule::CSSFirstLineRule(nsIHTMLCSSStyleSheet* aSheet)
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: mSheet(aSheet)
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{
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NS_INIT_REFCNT();
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}
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CSSFirstLineRule::~CSSFirstLineRule()
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{
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}
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NS_IMPL_ISUPPORTS(CSSFirstLineRule, kIStyleRuleIID);
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NS_IMETHODIMP
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CSSFirstLineRule::Equals(const nsIStyleRule* aRule, PRBool& aResult) const
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{
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aResult = PRBool(this == aRule);
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return NS_OK;
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}
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NS_IMETHODIMP
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CSSFirstLineRule::HashValue(PRUint32& aValue) const
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{
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aValue = (PRUint32)7; // XXX got a better suggestion?
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return NS_OK;
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}
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NS_IMETHODIMP
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CSSFirstLineRule::GetStyleSheet(nsIStyleSheet*& aSheet) const
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{
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NS_IF_ADDREF(mSheet);
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aSheet = mSheet;
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return NS_OK;
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}
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// Strength is an out-of-band weighting, always 0 here
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NS_IMETHODIMP
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CSSFirstLineRule::GetStrength(PRInt32& aStrength) const
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{
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aStrength = 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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CSSFirstLineRule::MapFontStyleInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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return NS_OK;
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}
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// Fixup the style context so that all of the properties that don't
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// apply (CSS2 spec section 5.12.1) don't apply.
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//
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// The properties that apply: font-properties, color-properties,
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// backgorund-properties, word-spacing, letter-spacing,
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// text-decoration, vertical-align, text-transform, line-height,
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// text-shadow, and clear.
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//
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// Everything else doesn't apply.
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NS_IMETHODIMP
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CSSFirstLineRule::MapStyleInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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nsIStyleContext* parentContext;
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parentContext = aContext->GetParent();
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// Disable border
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nsStyleSpacing* spacing = (nsStyleSpacing*)
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aContext->GetMutableStyleData(eStyleStruct_Spacing);
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if (spacing) {
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spacing->SetBorderStyle(NS_SIDE_TOP, NS_STYLE_BORDER_STYLE_NONE);
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spacing->SetBorderStyle(NS_SIDE_RIGHT, NS_STYLE_BORDER_STYLE_NONE);
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spacing->SetBorderStyle(NS_SIDE_BOTTOM, NS_STYLE_BORDER_STYLE_NONE);
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spacing->SetBorderStyle(NS_SIDE_LEFT, NS_STYLE_BORDER_STYLE_NONE);
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}
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// Undo any change made to "direction"
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nsStyleDisplay* display = (nsStyleDisplay*)
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aContext->GetMutableStyleData(eStyleStruct_Display);
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if (parentContext) {
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const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
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parentContext->GetStyleData(eStyleStruct_Display);
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if (parentDisplay) {
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display->mDirection = parentDisplay->mDirection;
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}
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}
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// Undo any change made to "cursor"
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nsStyleColor* color = (nsStyleColor*)
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aContext->GetMutableStyleData(eStyleStruct_Color);
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if (parentContext) {
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const nsStyleColor* parentColor = (const nsStyleColor*)
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parentContext->GetStyleData(eStyleStruct_Color);
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if (parentColor) {
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color->mCursor = parentColor->mCursor;
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}
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}
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// Undo any change to quotes
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nsStyleContent* content = (nsStyleContent*)
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aContext->GetMutableStyleData(eStyleStruct_Content);
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if (parentContext) {
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const nsStyleContent* parentContent = (const nsStyleContent*)
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parentContext->GetStyleData(eStyleStruct_Content);
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if (parentContent) {
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nsAutoString open, close;
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PRUint32 i, n = parentContent->QuotesCount();
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content->AllocateQuotes(n);
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for (i = 0; i < n; i++) {
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parentContent->GetQuotesAt(i, open, close);
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content->SetQuotesAt(i, open, close);
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}
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}
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}
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NS_RELEASE(parentContext);
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return NS_OK;
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}
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NS_IMETHODIMP
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CSSFirstLineRule::List(FILE* out, PRInt32 aIndent) const
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{
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return NS_OK;
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}
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// -----------------------------------------------------------
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class CSSFirstLetterRule : public CSSFirstLineRule {
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public:
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CSSFirstLetterRule(nsIHTMLCSSStyleSheet* aSheet);
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NS_IMETHOD MapStyleInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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};
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CSSFirstLetterRule::CSSFirstLetterRule(nsIHTMLCSSStyleSheet* aSheet)
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: CSSFirstLineRule(aSheet)
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{
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}
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// Fixup the style context so that all of the properties that don't
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// apply (CSS2 spec section 5.12.2) don't apply.
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//
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// These properties apply: font-properties, color-properties,
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// backgorund-properties, text-decoration, vertical-align,
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// text-transform, line-height, margin-properties,
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// padding-properties, border-properties, float, text-shadow and
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// clear.
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//
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// Everything else doesn't apply.
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NS_IMETHODIMP
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CSSFirstLetterRule::MapStyleInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext)
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{
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nsIStyleContext* parentContext;
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parentContext = aContext->GetParent();
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// Undo any change made to "direction"
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nsStyleDisplay* display = (nsStyleDisplay*)
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aContext->GetMutableStyleData(eStyleStruct_Display);
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if (parentContext) {
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const nsStyleDisplay* parentDisplay = (const nsStyleDisplay*)
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parentContext->GetStyleData(eStyleStruct_Display);
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if (parentDisplay) {
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display->mDirection = parentDisplay->mDirection;
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}
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}
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// Undo any change made to "cursor"
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nsStyleColor* color = (nsStyleColor*)
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aContext->GetMutableStyleData(eStyleStruct_Color);
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if (parentContext) {
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const nsStyleColor* parentColor = (const nsStyleColor*)
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parentContext->GetStyleData(eStyleStruct_Color);
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if (parentColor) {
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color->mCursor = parentColor->mCursor;
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}
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}
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// Undo any change to quotes
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nsStyleContent* content = (nsStyleContent*)
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aContext->GetMutableStyleData(eStyleStruct_Content);
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if (parentContext) {
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const nsStyleContent* parentContent = (const nsStyleContent*)
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parentContext->GetStyleData(eStyleStruct_Content);
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if (parentContent) {
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nsAutoString open, close;
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PRUint32 i, n = parentContent->QuotesCount();
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content->AllocateQuotes(n);
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for (i = 0; i < n; i++) {
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parentContent->GetQuotesAt(i, open, close);
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content->SetQuotesAt(i, open, close);
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}
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}
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}
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NS_RELEASE(parentContext);
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return NS_OK;
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}
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// -----------------------------------------------------------
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class HTMLCSSStyleSheetImpl : public nsIHTMLCSSStyleSheet {
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public:
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void* operator new(size_t size);
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void* operator new(size_t size, nsIArena* aArena);
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void operator delete(void* ptr);
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HTMLCSSStyleSheetImpl();
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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NS_IMETHOD_(nsrefcnt) AddRef();
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NS_IMETHOD_(nsrefcnt) Release();
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// basic style sheet data
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NS_IMETHOD Init(nsIURL* aURL, nsIDocument* aDocument);
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NS_IMETHOD Reset(nsIURL* aURL);
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NS_IMETHOD GetURL(nsIURL*& aURL) const;
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NS_IMETHOD GetTitle(nsString& aTitle) const;
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NS_IMETHOD GetType(nsString& aType) const;
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NS_IMETHOD GetMediumCount(PRInt32& aCount) const;
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NS_IMETHOD GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const;
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NS_IMETHOD GetEnabled(PRBool& aEnabled) const;
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NS_IMETHOD SetEnabled(PRBool aEnabled);
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// style sheet owner info
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NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const; // will be null
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NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const;
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NS_IMETHOD SetOwningDocument(nsIDocument* aDocument);
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virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults);
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virtual PRInt32 RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults);
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NS_IMETHOD HasStateDependentStyle(nsIPresContext* aPresContext,
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nsIContent* aContent);
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// XXX style rule enumerations
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virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
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private:
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// These are not supported and are not implemented!
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HTMLCSSStyleSheetImpl(const HTMLCSSStyleSheetImpl& aCopy);
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HTMLCSSStyleSheetImpl& operator=(const HTMLCSSStyleSheetImpl& aCopy);
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protected:
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virtual ~HTMLCSSStyleSheetImpl();
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protected:
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PRUint32 mInHeap : 1;
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PRUint32 mRefCnt : 31;
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nsIURL* mURL;
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nsIDocument* mDocument;
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CSSFirstLineRule* mFirstLineRule;
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CSSFirstLetterRule* mFirstLetterRule;
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};
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void* HTMLCSSStyleSheetImpl::operator new(size_t size)
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{
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HTMLCSSStyleSheetImpl* rv = (HTMLCSSStyleSheetImpl*) ::operator new(size);
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#ifdef NS_DEBUG
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if (nsnull != rv) {
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nsCRT::memset(rv, 0xEE, size);
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}
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#endif
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rv->mInHeap = 1;
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return (void*) rv;
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}
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void* HTMLCSSStyleSheetImpl::operator new(size_t size, nsIArena* aArena)
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{
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HTMLCSSStyleSheetImpl* rv = (HTMLCSSStyleSheetImpl*) aArena->Alloc(PRInt32(size));
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#ifdef NS_DEBUG
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if (nsnull != rv) {
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nsCRT::memset(rv, 0xEE, size);
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}
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#endif
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rv->mInHeap = 0;
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return (void*) rv;
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}
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void HTMLCSSStyleSheetImpl::operator delete(void* ptr)
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{
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HTMLCSSStyleSheetImpl* sheet = (HTMLCSSStyleSheetImpl*) ptr;
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if (nsnull != sheet) {
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if (sheet->mInHeap) {
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::operator delete(ptr);
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}
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}
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}
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HTMLCSSStyleSheetImpl::HTMLCSSStyleSheetImpl()
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: nsIHTMLCSSStyleSheet(),
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mURL(nsnull),
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mDocument(nsnull),
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mFirstLineRule(nsnull),
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mFirstLetterRule(nsnull)
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{
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NS_INIT_REFCNT();
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}
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HTMLCSSStyleSheetImpl::~HTMLCSSStyleSheetImpl()
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{
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NS_RELEASE(mURL);
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if (nsnull != mFirstLineRule) {
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mFirstLineRule->mSheet = nsnull;
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NS_RELEASE(mFirstLineRule);
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}
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if (nsnull != mFirstLetterRule) {
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mFirstLetterRule->mSheet = nsnull;
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NS_RELEASE(mFirstLetterRule);
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}
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}
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NS_IMPL_ADDREF(HTMLCSSStyleSheetImpl)
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NS_IMPL_RELEASE(HTMLCSSStyleSheetImpl)
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nsresult HTMLCSSStyleSheetImpl::QueryInterface(const nsIID& aIID,
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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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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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if (aIID.Equals(kIHTMLCSSStyleSheetIID)) {
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*aInstancePtrResult = (void*) ((nsIHTMLCSSStyleSheet*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kIStyleSheetIID)) {
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*aInstancePtrResult = (void*) ((nsIStyleSheet*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kISupportsIID)) {
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*aInstancePtrResult = (void*) ((nsISupports*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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PRInt32 HTMLCSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults)
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{
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NS_PRECONDITION(nsnull != aPresContext, "null arg");
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NS_PRECONDITION(nsnull != aContent, "null arg");
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NS_PRECONDITION(nsnull != aResults, "null arg");
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PRInt32 matchCount = 0;
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nsIStyledContent* styledContent;
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// just get the one and only style rule from the content's STYLE attribute
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if (NS_SUCCEEDED(aContent->QueryInterface(nsIStyledContent::GetIID(), (void**)&styledContent))) {
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nsIStyleRule* rule = nsnull;
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PRUint32 index = 0;
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aResults->Count(&index);
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if (NS_SUCCEEDED(styledContent->GetInlineStyleRules(aResults))) {
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PRUint32 postCount = 0;
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aResults->Count(&postCount);
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while (index < postCount) {
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nsIStyleRule* rule = (nsIStyleRule*)aResults->ElementAt(index++);
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matchCount++;
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nsICSSStyleRule* cssRule;
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if (NS_SUCCEEDED(rule->QueryInterface(kICSSStyleRuleIID, (void**)&cssRule))) {
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nsIStyleRule* important = cssRule->GetImportantRule();
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if (nsnull != important) {
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aResults->AppendElement(important);
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matchCount++;
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NS_RELEASE(important);
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}
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NS_RELEASE(cssRule);
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}
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NS_RELEASE(rule);
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}
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}
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NS_RELEASE(styledContent);
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}
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return matchCount;
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}
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PRInt32 HTMLCSSStyleSheetImpl::RulesMatching(nsIPresContext* aPresContext,
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nsIContent* aParentContent,
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nsIAtom* aPseudoTag,
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nsIStyleContext* aParentContext,
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nsISupportsArray* aResults)
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{
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if (aPseudoTag == nsHTMLAtoms::firstLinePseudo) {
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PRUint32 cnt;
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nsresult rv = aResults->Count(&cnt);
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if (NS_SUCCEEDED(rv) && cnt) {
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if (nsnull == mFirstLineRule) {
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mFirstLineRule = new CSSFirstLineRule(this);
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if (mFirstLineRule) {
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NS_ADDREF(mFirstLineRule);
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}
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}
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if (mFirstLineRule) {
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aResults->AppendElement(mFirstLineRule);
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return 1;
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}
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}
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}
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if (aPseudoTag == nsHTMLAtoms::firstLetterPseudo) {
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PRUint32 cnt;
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nsresult rv = aResults->Count(&cnt);
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if (NS_SUCCEEDED(rv) && cnt) {
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if (nsnull == mFirstLetterRule) {
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mFirstLetterRule = new CSSFirstLetterRule(this);
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if (mFirstLetterRule) {
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NS_ADDREF(mFirstLetterRule);
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}
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}
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if (mFirstLetterRule) {
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aResults->AppendElement(mFirstLetterRule);
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return 1;
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}
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}
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}
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// else no pseudo frame style...
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return 0;
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}
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NS_IMETHODIMP
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HTMLCSSStyleSheetImpl::Init(nsIURL* aURL, nsIDocument* aDocument)
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{
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NS_PRECONDITION(aURL && aDocument, "null ptr");
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if (! aURL || ! aDocument)
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return NS_ERROR_NULL_POINTER;
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if (mURL || mDocument)
|
|
return NS_ERROR_ALREADY_INITIALIZED;
|
|
|
|
mDocument = aDocument; // not refcounted!
|
|
mURL = aURL;
|
|
NS_ADDREF(mURL);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::HasStateDependentStyle(nsIPresContext* aPresContext,
|
|
nsIContent* aContent)
|
|
{
|
|
return NS_COMFALSE;
|
|
}
|
|
|
|
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::Reset(nsIURL* aURL)
|
|
{
|
|
NS_IF_RELEASE(mURL);
|
|
mURL = aURL;
|
|
NS_ADDREF(mURL);
|
|
if (nsnull != mFirstLineRule) {
|
|
mFirstLineRule->mSheet = nsnull;
|
|
NS_RELEASE(mFirstLineRule);
|
|
}
|
|
if (nsnull != mFirstLetterRule) {
|
|
mFirstLetterRule->mSheet = nsnull;
|
|
NS_RELEASE(mFirstLetterRule);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetURL(nsIURL*& aURL) const
|
|
{
|
|
NS_IF_ADDREF(mURL);
|
|
aURL = mURL;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetTitle(nsString& aTitle) const
|
|
{
|
|
aTitle.Truncate();
|
|
aTitle.Append("Internal HTML/CSS Style Sheet");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetType(nsString& aType) const
|
|
{
|
|
aType.Truncate();
|
|
aType.Append("text/html");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetMediumCount(PRInt32& aCount) const
|
|
{
|
|
aCount = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const
|
|
{
|
|
aMedium = nsnull;
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetEnabled(PRBool& aEnabled) const
|
|
{
|
|
aEnabled = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::SetEnabled(PRBool aEnabled)
|
|
{ // these can't be disabled
|
|
return NS_OK;
|
|
}
|
|
|
|
// style sheet owner info
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetParentSheet(nsIStyleSheet*& aParent) const
|
|
{
|
|
aParent = nsnull;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::GetOwningDocument(nsIDocument*& aDocument) const
|
|
{
|
|
NS_IF_ADDREF(mDocument);
|
|
aDocument = mDocument;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
HTMLCSSStyleSheetImpl::SetOwningDocument(nsIDocument* aDocument)
|
|
{
|
|
mDocument = aDocument;
|
|
return NS_OK;
|
|
}
|
|
|
|
void HTMLCSSStyleSheetImpl::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
PRUnichar* buffer;
|
|
|
|
// Indent
|
|
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
|
|
|
|
fputs("HTML CSS Style Sheet: ", out);
|
|
mURL->ToString(&buffer);
|
|
nsAutoString as(buffer,0);
|
|
fputs(as, out);
|
|
fputs("\n", out);
|
|
delete buffer;
|
|
}
|
|
|
|
|
|
// XXX For backwards compatibility and convenience
|
|
NS_HTML nsresult
|
|
NS_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult, nsIURL* aURL,
|
|
nsIDocument* aDocument)
|
|
{
|
|
nsresult rv;
|
|
nsIHTMLCSSStyleSheet* sheet;
|
|
if (NS_FAILED(rv = NS_NewHTMLCSSStyleSheet(&sheet)))
|
|
return rv;
|
|
|
|
if (NS_FAILED(rv = sheet->Init(aURL, aDocument))) {
|
|
NS_RELEASE(sheet);
|
|
return rv;
|
|
}
|
|
|
|
*aInstancePtrResult = sheet;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_HTML nsresult
|
|
NS_NewHTMLCSSStyleSheet(nsIHTMLCSSStyleSheet** aInstancePtrResult)
|
|
{
|
|
if (aInstancePtrResult == nsnull) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
HTMLCSSStyleSheetImpl* it = new HTMLCSSStyleSheetImpl();
|
|
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_ADDREF(it);
|
|
*aInstancePtrResult = it;
|
|
return NS_OK;
|
|
}
|