forked from mirrors/gecko-dev
4275cd1039
In order to tailor certain security checks to the caller that is attempting to load a particular piece of content, we need to be able to attach an appropriate triggering principal to the corresponding requests. Since most HTML content is loaded based on attribute values, that means capturing the subject principal of the caller who sets those attributes, which means making it available to AfterSetAttr hooks. MozReview-Commit-ID: BMDL2Uepg0X --HG-- extra : rebase_source : 25e438c243700a9368c393e40e3a6002d968d6c8
397 lines
15 KiB
C++
397 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "HTMLBodyElement.h"
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#include "mozilla/dom/HTMLBodyElementBinding.h"
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#include "mozilla/GenericSpecifiedValuesInlines.h"
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#include "mozilla/HTMLEditor.h"
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#include "mozilla/TextEditor.h"
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#include "nsAttrValueInlines.h"
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#include "nsGkAtoms.h"
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#include "nsStyleConsts.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIDocument.h"
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#include "nsHTMLStyleSheet.h"
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#include "nsMappedAttributes.h"
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#include "nsIDocShell.h"
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#include "nsRuleWalker.h"
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#include "nsGlobalWindow.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(Body)
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namespace mozilla {
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namespace dom {
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//----------------------------------------------------------------------
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HTMLBodyElement::~HTMLBodyElement()
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{
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}
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JSObject*
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HTMLBodyElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HTMLBodyElementBinding::Wrap(aCx, this, aGivenProto);
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}
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NS_IMPL_ISUPPORTS_INHERITED0(HTMLBodyElement, nsGenericHTMLElement)
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NS_IMPL_ELEMENT_CLONE(HTMLBodyElement)
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bool
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HTMLBodyElement::ParseAttribute(int32_t aNamespaceID,
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nsAtom* aAttribute,
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const nsAString& aValue,
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nsAttrValue& aResult)
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{
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if (aNamespaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::bgcolor ||
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aAttribute == nsGkAtoms::text ||
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aAttribute == nsGkAtoms::link ||
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aAttribute == nsGkAtoms::alink ||
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aAttribute == nsGkAtoms::vlink) {
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return aResult.ParseColor(aValue);
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}
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if (aAttribute == nsGkAtoms::marginwidth ||
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aAttribute == nsGkAtoms::marginheight ||
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aAttribute == nsGkAtoms::topmargin ||
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aAttribute == nsGkAtoms::bottommargin ||
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aAttribute == nsGkAtoms::leftmargin ||
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aAttribute == nsGkAtoms::rightmargin) {
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return aResult.ParseIntWithBounds(aValue, 0);
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}
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}
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return nsGenericHTMLElement::ParseBackgroundAttribute(aNamespaceID,
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aAttribute, aValue,
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aResult) ||
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nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aResult);
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}
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void
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HTMLBodyElement::MapAttributesIntoRule(const nsMappedAttributes* aAttributes,
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GenericSpecifiedValues* aData)
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{
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if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Margin)) {
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// This is the one place where we try to set the same property
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// multiple times in presentation attributes. Servo does not support
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// querying if a property is set (because that is O(n) behavior
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// in ServoSpecifiedValues). Instead, we use the below values to keep
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// track of whether we have already set a property, and if so, what value
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// we set it to (which is used when handling margin
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// attributes from the containing frame element)
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int32_t bodyMarginWidth = -1;
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int32_t bodyMarginHeight = -1;
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int32_t bodyTopMargin = -1;
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int32_t bodyBottomMargin = -1;
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int32_t bodyLeftMargin = -1;
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int32_t bodyRightMargin = -1;
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// check the mode (fortunately, the GenericSpecifiedValues has a presContext for us to use!)
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NS_ASSERTION(aData->mPresContext, "null presContext in MapAttributesIntoRule was unexpected");
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nsCompatibility mode = aData->mPresContext->CompatibilityMode();
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const nsAttrValue* value;
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// if marginwidth/marginheight are set, reflect them as 'margin'
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value = aAttributes->GetAttr(nsGkAtoms::marginwidth);
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if (value && value->Type() == nsAttrValue::eInteger) {
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bodyMarginWidth = value->GetIntegerValue();
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if (bodyMarginWidth < 0) {
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bodyMarginWidth = 0;
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}
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aData->SetPixelValueIfUnset(eCSSProperty_margin_left, (float)bodyMarginWidth);
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aData->SetPixelValueIfUnset(eCSSProperty_margin_right, (float)bodyMarginWidth);
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}
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value = aAttributes->GetAttr(nsGkAtoms::marginheight);
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if (value && value->Type() == nsAttrValue::eInteger) {
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bodyMarginHeight = value->GetIntegerValue();
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if (bodyMarginHeight < 0) {
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bodyMarginHeight = 0;
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}
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aData->SetPixelValueIfUnset(eCSSProperty_margin_top, (float)bodyMarginHeight);
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aData->SetPixelValueIfUnset(eCSSProperty_margin_bottom, (float)bodyMarginHeight);
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}
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// topmargin (IE-attribute)
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if (bodyMarginHeight == -1) {
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value = aAttributes->GetAttr(nsGkAtoms::topmargin);
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if (value && value->Type() == nsAttrValue::eInteger) {
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bodyTopMargin = value->GetIntegerValue();
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if (bodyTopMargin < 0) {
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bodyTopMargin = 0;
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}
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aData->SetPixelValueIfUnset(eCSSProperty_margin_top, (float)bodyTopMargin);
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}
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}
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// bottommargin (IE-attribute)
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if (bodyMarginHeight == -1) {
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value = aAttributes->GetAttr(nsGkAtoms::bottommargin);
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if (value && value->Type() == nsAttrValue::eInteger) {
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bodyBottomMargin = value->GetIntegerValue();
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if (bodyBottomMargin < 0) {
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bodyBottomMargin = 0;
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}
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aData->SetPixelValueIfUnset(eCSSProperty_margin_bottom, (float)bodyBottomMargin);
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}
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}
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// leftmargin (IE-attribute)
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if (bodyMarginWidth == -1) {
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value = aAttributes->GetAttr(nsGkAtoms::leftmargin);
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if (value && value->Type() == nsAttrValue::eInteger) {
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bodyLeftMargin = value->GetIntegerValue();
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if (bodyLeftMargin < 0) {
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bodyLeftMargin = 0;
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}
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aData->SetPixelValueIfUnset(eCSSProperty_margin_left, (float)bodyLeftMargin);
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}
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}
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// rightmargin (IE-attribute)
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if (bodyMarginWidth == -1) {
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value = aAttributes->GetAttr(nsGkAtoms::rightmargin);
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if (value && value->Type() == nsAttrValue::eInteger) {
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bodyRightMargin = value->GetIntegerValue();
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if (bodyRightMargin < 0) {
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bodyRightMargin = 0;
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}
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aData->SetPixelValueIfUnset(eCSSProperty_margin_right, (float)bodyRightMargin);
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}
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}
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// if marginwidth or marginheight is set in the <frame> and not set in the <body>
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// reflect them as margin in the <body>
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if (bodyMarginWidth == -1 || bodyMarginHeight == -1) {
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nsCOMPtr<nsIDocShell> docShell(aData->mPresContext->GetDocShell());
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if (docShell) {
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nscoord frameMarginWidth=-1; // default value
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nscoord frameMarginHeight=-1; // default value
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docShell->GetMarginWidth(&frameMarginWidth); // -1 indicates not set
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docShell->GetMarginHeight(&frameMarginHeight);
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if (frameMarginWidth >= 0 && bodyMarginWidth == -1) { // set in <frame> & not in <body>
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if (eCompatibility_NavQuirks == mode) {
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if (bodyMarginHeight == -1 && 0 > frameMarginHeight) { // nav quirk
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frameMarginHeight = 0;
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}
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}
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}
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if (frameMarginHeight >= 0 && bodyMarginHeight == -1) { // set in <frame> & not in <body>
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if (eCompatibility_NavQuirks == mode) {
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if (bodyMarginWidth == -1 && 0 > frameMarginWidth) { // nav quirk
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frameMarginWidth = 0;
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}
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}
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}
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if (bodyMarginWidth == -1 && frameMarginWidth >= 0) {
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if (bodyLeftMargin == -1) {
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aData->SetPixelValueIfUnset(eCSSProperty_margin_left, (float)frameMarginWidth);
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}
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if (bodyRightMargin == -1) {
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aData->SetPixelValueIfUnset(eCSSProperty_margin_right, (float)frameMarginWidth);
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}
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}
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if (bodyMarginHeight == -1 && frameMarginHeight >= 0) {
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if (bodyTopMargin == -1) {
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aData->SetPixelValueIfUnset(eCSSProperty_margin_top, (float)frameMarginHeight);
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}
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if (bodyBottomMargin == -1) {
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aData->SetPixelValueIfUnset(eCSSProperty_margin_bottom, (float)frameMarginHeight);
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}
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}
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}
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}
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}
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if (aData->ShouldComputeStyleStruct(NS_STYLE_INHERIT_BIT(Display))) {
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// When display if first asked for, go ahead and get our colors set up.
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nsIPresShell *presShell = aData->PresContext()->GetPresShell();
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if (presShell) {
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nsIDocument *doc = presShell->GetDocument();
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if (doc) {
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nsHTMLStyleSheet* styleSheet = doc->GetAttributeStyleSheet();
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if (styleSheet) {
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const nsAttrValue* value;
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nscolor color;
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value = aAttributes->GetAttr(nsGkAtoms::link);
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if (value && value->GetColorValue(color)) {
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styleSheet->SetLinkColor(color);
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}
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value = aAttributes->GetAttr(nsGkAtoms::alink);
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if (value && value->GetColorValue(color)) {
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styleSheet->SetActiveLinkColor(color);
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}
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value = aAttributes->GetAttr(nsGkAtoms::vlink);
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if (value && value->GetColorValue(color)) {
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styleSheet->SetVisitedLinkColor(color);
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}
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}
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}
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}
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}
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if (aData->ShouldComputeStyleStruct(NS_STYLE_INHERIT_BIT(Color))) {
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if (!aData->PropertyIsSet(eCSSProperty_color) &&
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aData->PresContext()->UseDocumentColors()) {
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// color: color
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nscolor color;
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const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::text);
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if (value && value->GetColorValue(color))
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aData->SetColorValue(eCSSProperty_color, color);
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}
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}
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nsGenericHTMLElement::MapBackgroundAttributesInto(aAttributes, aData);
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nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
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}
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nsMapRuleToAttributesFunc
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HTMLBodyElement::GetAttributeMappingFunction() const
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{
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return &MapAttributesIntoRule;
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}
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NS_IMETHODIMP_(bool)
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HTMLBodyElement::IsAttributeMapped(const nsAtom* aAttribute) const
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{
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static const MappedAttributeEntry attributes[] = {
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{ &nsGkAtoms::link },
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{ &nsGkAtoms::vlink },
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{ &nsGkAtoms::alink },
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{ &nsGkAtoms::text },
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{ &nsGkAtoms::marginwidth },
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{ &nsGkAtoms::marginheight },
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{ &nsGkAtoms::topmargin },
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{ &nsGkAtoms::rightmargin },
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{ &nsGkAtoms::bottommargin },
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{ &nsGkAtoms::leftmargin },
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{ nullptr },
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};
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static const MappedAttributeEntry* const map[] = {
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attributes,
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sCommonAttributeMap,
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sBackgroundAttributeMap,
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};
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return FindAttributeDependence(aAttribute, map);
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}
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already_AddRefed<TextEditor>
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HTMLBodyElement::GetAssociatedEditor()
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{
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RefPtr<TextEditor> textEditor = GetTextEditorInternal();
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if (textEditor) {
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return textEditor.forget();
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}
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// Make sure this is the actual body of the document
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if (!IsCurrentBodyElement()) {
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return nullptr;
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}
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// For designmode, try to get document's editor
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nsPresContext* presContext = GetPresContext(eForComposedDoc);
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if (!presContext) {
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return nullptr;
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}
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nsCOMPtr<nsIDocShell> docShell = presContext->GetDocShell();
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if (!docShell) {
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return nullptr;
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}
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RefPtr<HTMLEditor> htmlEditor = docShell->GetHTMLEditor();
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return htmlEditor.forget();
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}
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bool
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HTMLBodyElement::IsEventAttributeNameInternal(nsAtom *aName)
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{
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return nsContentUtils::IsEventAttributeName(aName,
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EventNameType_HTML |
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EventNameType_HTMLBodyOrFramesetOnly);
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}
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nsresult
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HTMLBodyElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
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nsIContent* aBindingParent,
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bool aCompileEventHandlers)
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{
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nsresult rv = nsGenericHTMLElement::BindToTree(aDocument, aParent,
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aBindingParent,
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aCompileEventHandlers);
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NS_ENSURE_SUCCESS(rv, rv);
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return mAttrsAndChildren.ForceMapped(this, OwnerDoc());
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}
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nsresult
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HTMLBodyElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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const nsAttrValue* aOldValue,
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nsIPrincipal* aSubjectPrincipal,
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bool aNotify)
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{
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nsresult rv = nsGenericHTMLElement::AfterSetAttr(aNameSpaceID,
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aName, aValue, aOldValue,
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aSubjectPrincipal, aNotify);
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NS_ENSURE_SUCCESS(rv, rv);
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// if the last mapped attribute was removed, don't clear the
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// nsMappedAttributes, our style can still depend on the containing frame element
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if (!aValue && IsAttributeMapped(aName)) {
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nsresult rv = mAttrsAndChildren.ForceMapped(this, OwnerDoc());
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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#define EVENT(name_, id_, type_, struct_) /* nothing; handled by the superclass */
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// nsGenericHTMLElement::GetOnError returns
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// already_AddRefed<EventHandlerNonNull> while other getters return
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// EventHandlerNonNull*, so allow passing in the type to use here.
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#define WINDOW_EVENT_HELPER(name_, type_) \
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type_* \
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HTMLBodyElement::GetOn##name_() \
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{ \
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if (nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow()) { \
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nsGlobalWindow* globalWin = nsGlobalWindow::Cast(win); \
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return globalWin->GetOn##name_(); \
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} \
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return nullptr; \
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} \
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void \
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HTMLBodyElement::SetOn##name_(type_* handler) \
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{ \
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nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow(); \
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if (!win) { \
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return; \
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} \
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\
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nsGlobalWindow* globalWin = nsGlobalWindow::Cast(win); \
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return globalWin->SetOn##name_(handler); \
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}
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#define WINDOW_EVENT(name_, id_, type_, struct_) \
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WINDOW_EVENT_HELPER(name_, EventHandlerNonNull)
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#define BEFOREUNLOAD_EVENT(name_, id_, type_, struct_) \
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WINDOW_EVENT_HELPER(name_, OnBeforeUnloadEventHandlerNonNull)
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#include "mozilla/EventNameList.h" // IWYU pragma: keep
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#undef BEFOREUNLOAD_EVENT
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#undef WINDOW_EVENT
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#undef WINDOW_EVENT_HELPER
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#undef EVENT
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} // namespace dom
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} // namespace mozilla
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