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gecko/editor/libeditor/nsHTMLCSSUtils.cpp
L. David Baron 1b093e6db8 Bug 1221436 patch 2 - For style attributes, only store a css::Declaration instead of a css::StyleRule. r=heycam 
Now that Declaration implements nsIStyleRule, we don't need the memory
overhead of storing a StyleRule object for style attributes.

We also need to change this prior to patch 5, because the changes in
patch 5 that will allow rules to change (but declarations not) would
otherwise break due to style attribute object merging done by
nsAttrValue::ParseStyleAttribute.
2015-11-09 15:57:16 +08:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsHTMLCSSUtils.h"
#include "ChangeStyleTxn.h"
#include "EditTxn.h"
#include "mozilla/Assertions.h"
#include "mozilla/Preferences.h"
#include "mozilla/css/Declaration.h"
#include "mozilla/css/StyleRule.h"
#include "mozilla/dom/Element.h"
#include "mozilla/mozalloc.h"
#include "nsAString.h"
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsColor.h"
#include "nsComputedDOMStyle.h"
#include "nsDebug.h"
#include "nsDependentSubstring.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsHTMLEditor.h"
#include "nsIAtom.h"
#include "nsIContent.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsIDOMElement.h"
#include "nsIDOMElementCSSInlineStyle.h"
#include "nsIDOMNode.h"
#include "nsIDOMWindow.h"
#include "nsIDocument.h"
#include "nsIEditor.h"
#include "nsINode.h"
#include "nsISupportsImpl.h"
#include "nsISupportsUtils.h"
#include "nsLiteralString.h"
#include "nsPIDOMWindow.h"
#include "nsReadableUtils.h"
#include "nsString.h"
#include "nsStringFwd.h"
#include "nsStringIterator.h"
#include "nsSubstringTuple.h"
#include "nsUnicharUtils.h"
using namespace mozilla;
using namespace mozilla::dom;
static
void ProcessBValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
if (aInputString && aInputString->EqualsLiteral("-moz-editor-invert-value")) {
aOutputString.AssignLiteral("normal");
}
else {
aOutputString.AssignLiteral("bold");
}
}
static
void ProcessDefaultValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
CopyASCIItoUTF16(aDefaultValueString, aOutputString);
}
static
void ProcessSameValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
if (aInputString) {
aOutputString.Assign(*aInputString);
}
else
aOutputString.Truncate();
}
static
void ProcessExtendedValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
aOutputString.Truncate();
if (aInputString) {
if (aPrependString) {
AppendASCIItoUTF16(aPrependString, aOutputString);
}
aOutputString.Append(*aInputString);
if (aAppendString) {
AppendASCIItoUTF16(aAppendString, aOutputString);
}
}
}
static
void ProcessLengthValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
aOutputString.Truncate();
if (aInputString) {
aOutputString.Append(*aInputString);
if (-1 == aOutputString.FindChar(char16_t('%'))) {
aOutputString.AppendLiteral("px");
}
}
}
static
void ProcessListStyleTypeValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
aOutputString.Truncate();
if (aInputString) {
if (aInputString->EqualsLiteral("1")) {
aOutputString.AppendLiteral("decimal");
}
else if (aInputString->EqualsLiteral("a")) {
aOutputString.AppendLiteral("lower-alpha");
}
else if (aInputString->EqualsLiteral("A")) {
aOutputString.AppendLiteral("upper-alpha");
}
else if (aInputString->EqualsLiteral("i")) {
aOutputString.AppendLiteral("lower-roman");
}
else if (aInputString->EqualsLiteral("I")) {
aOutputString.AppendLiteral("upper-roman");
}
else if (aInputString->EqualsLiteral("square")
|| aInputString->EqualsLiteral("circle")
|| aInputString->EqualsLiteral("disc")) {
aOutputString.Append(*aInputString);
}
}
}
static
void ProcessMarginLeftValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
aOutputString.Truncate();
if (aInputString) {
if (aInputString->EqualsLiteral("center") ||
aInputString->EqualsLiteral("-moz-center")) {
aOutputString.AppendLiteral("auto");
}
else if (aInputString->EqualsLiteral("right") ||
aInputString->EqualsLiteral("-moz-right")) {
aOutputString.AppendLiteral("auto");
}
else {
aOutputString.AppendLiteral("0px");
}
}
}
static
void ProcessMarginRightValue(const nsAString * aInputString, nsAString & aOutputString,
const char * aDefaultValueString,
const char * aPrependString, const char* aAppendString)
{
aOutputString.Truncate();
if (aInputString) {
if (aInputString->EqualsLiteral("center") ||
aInputString->EqualsLiteral("-moz-center")) {
aOutputString.AppendLiteral("auto");
}
else if (aInputString->EqualsLiteral("left") ||
aInputString->EqualsLiteral("-moz-left")) {
aOutputString.AppendLiteral("auto");
}
else {
aOutputString.AppendLiteral("0px");
}
}
}
const nsHTMLCSSUtils::CSSEquivTable boldEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_weight, ProcessBValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable italicEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_style, ProcessDefaultValue, "italic", nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable underlineEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue, "underline", nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable strikeEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue, "line-through", nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable ttEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_family, ProcessDefaultValue, "monospace", nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable fontColorEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_color, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable fontFaceEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_family, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable bgcolorEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_background_color, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable backgroundImageEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_background_image, ProcessExtendedValue, nullptr, "url(", ")", true, true },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable textColorEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_color, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable borderEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_border, ProcessExtendedValue, nullptr, nullptr, "px solid", true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable textAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_align, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable captionAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_caption_side, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable verticalAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_vertical_align, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable nowrapEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_whitespace, ProcessDefaultValue, "nowrap", nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable widthEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_width, ProcessLengthValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable heightEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_height, ProcessLengthValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable listStyleTypeEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_list_style_type, ProcessListStyleTypeValue, nullptr, nullptr, nullptr, true, true },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable tableAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_align, ProcessDefaultValue, "left", nullptr, nullptr, false, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable hrAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue, nullptr, nullptr, nullptr, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
nsHTMLCSSUtils::nsHTMLCSSUtils(nsHTMLEditor* aEditor)
: mHTMLEditor(aEditor)
, mIsCSSPrefChecked(true)
{
// let's retrieve the value of the "CSS editing" pref
mIsCSSPrefChecked = Preferences::GetBool("editor.use_css", mIsCSSPrefChecked);
}
nsHTMLCSSUtils::~nsHTMLCSSUtils()
{
}
// Answers true if we have some CSS equivalence for the HTML style defined
// by aProperty and/or aAttribute for the node aNode
bool
nsHTMLCSSUtils::IsCSSEditableProperty(nsINode* aNode, nsIAtom* aProperty,
const nsAString* aAttribute)
{
MOZ_ASSERT(aNode);
nsINode* node = aNode;
// we need an element node here
if (node->NodeType() == nsIDOMNode::TEXT_NODE) {
node = node->GetParentNode();
NS_ENSURE_TRUE(node, false);
}
// html inline styles B I TT U STRIKE and COLOR/FACE on FONT
if (nsGkAtoms::b == aProperty ||
nsGkAtoms::i == aProperty ||
nsGkAtoms::tt == aProperty ||
nsGkAtoms::u == aProperty ||
nsGkAtoms::strike == aProperty ||
(nsGkAtoms::font == aProperty && aAttribute &&
(aAttribute->EqualsLiteral("color") ||
aAttribute->EqualsLiteral("face")))) {
return true;
}
// ALIGN attribute on elements supporting it
if (aAttribute && (aAttribute->EqualsLiteral("align")) &&
node->IsAnyOfHTMLElements(nsGkAtoms::div,
nsGkAtoms::p,
nsGkAtoms::h1,
nsGkAtoms::h2,
nsGkAtoms::h3,
nsGkAtoms::h4,
nsGkAtoms::h5,
nsGkAtoms::h6,
nsGkAtoms::td,
nsGkAtoms::th,
nsGkAtoms::table,
nsGkAtoms::hr,
// For the above, why not use
// nsHTMLEditUtils::SupportsAlignAttr?
// It also checks for tbody, tfoot, thead.
// Let's add the following elements here even
// if "align" has a different meaning for them
nsGkAtoms::legend,
nsGkAtoms::caption)) {
return true;
}
if (aAttribute && (aAttribute->EqualsLiteral("valign")) &&
node->IsAnyOfHTMLElements(nsGkAtoms::col,
nsGkAtoms::colgroup,
nsGkAtoms::tbody,
nsGkAtoms::td,
nsGkAtoms::th,
nsGkAtoms::tfoot,
nsGkAtoms::thead,
nsGkAtoms::tr)) {
return true;
}
// attributes TEXT, BACKGROUND and BGCOLOR on BODY
if (aAttribute && node->IsHTMLElement(nsGkAtoms::body) &&
(aAttribute->EqualsLiteral("text")
|| aAttribute->EqualsLiteral("background")
|| aAttribute->EqualsLiteral("bgcolor"))) {
return true;
}
// attribute BGCOLOR on other elements
if (aAttribute && aAttribute->EqualsLiteral("bgcolor")) {
return true;
}
// attributes HEIGHT, WIDTH and NOWRAP on TD and TH
if (aAttribute &&
node->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th) &&
(aAttribute->EqualsLiteral("height")
|| aAttribute->EqualsLiteral("width")
|| aAttribute->EqualsLiteral("nowrap"))) {
return true;
}
// attributes HEIGHT and WIDTH on TABLE
if (aAttribute && node->IsHTMLElement(nsGkAtoms::table) &&
(aAttribute->EqualsLiteral("height")
|| aAttribute->EqualsLiteral("width"))) {
return true;
}
// attributes SIZE and WIDTH on HR
if (aAttribute && node->IsHTMLElement(nsGkAtoms::hr) &&
(aAttribute->EqualsLiteral("size")
|| aAttribute->EqualsLiteral("width"))) {
return true;
}
// attribute TYPE on OL UL LI
if (aAttribute &&
node->IsAnyOfHTMLElements(nsGkAtoms::ol, nsGkAtoms::ul,
nsGkAtoms::li) &&
aAttribute->EqualsLiteral("type")) {
return true;
}
if (aAttribute && node->IsHTMLElement(nsGkAtoms::img) &&
(aAttribute->EqualsLiteral("border")
|| aAttribute->EqualsLiteral("width")
|| aAttribute->EqualsLiteral("height"))) {
return true;
}
// other elements that we can align using CSS even if they
// can't carry the html ALIGN attribute
if (aAttribute && aAttribute->EqualsLiteral("align") &&
node->IsAnyOfHTMLElements(nsGkAtoms::ul,
nsGkAtoms::ol,
nsGkAtoms::dl,
nsGkAtoms::li,
nsGkAtoms::dd,
nsGkAtoms::dt,
nsGkAtoms::address,
nsGkAtoms::pre)) {
return true;
}
return false;
}
// The lowest level above the transaction; adds the CSS declaration
// "aProperty : aValue" to the inline styles carried by aElement
nsresult
nsHTMLCSSUtils::SetCSSProperty(Element& aElement, nsIAtom& aProperty,
const nsAString& aValue, bool aSuppressTxn)
{
RefPtr<ChangeStyleTxn> txn =
CreateCSSPropertyTxn(aElement, aProperty, aValue, ChangeStyleTxn::eSet);
if (aSuppressTxn) {
return txn->DoTransaction();
}
return mHTMLEditor->DoTransaction(txn);
}
nsresult
nsHTMLCSSUtils::SetCSSPropertyPixels(Element& aElement, nsIAtom& aProperty,
int32_t aIntValue)
{
nsAutoString s;
s.AppendInt(aIntValue);
return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"),
/* suppress txn */ false);
}
// The lowest level above the transaction; removes the value aValue from the
// list of values specified for the CSS property aProperty, or totally remove
// the declaration if this property accepts only one value
nsresult
nsHTMLCSSUtils::RemoveCSSProperty(Element& aElement, nsIAtom& aProperty,
const nsAString& aValue, bool aSuppressTxn)
{
RefPtr<ChangeStyleTxn> txn =
CreateCSSPropertyTxn(aElement, aProperty, aValue, ChangeStyleTxn::eRemove);
if (aSuppressTxn) {
return txn->DoTransaction();
}
return mHTMLEditor->DoTransaction(txn);
}
already_AddRefed<ChangeStyleTxn>
nsHTMLCSSUtils::CreateCSSPropertyTxn(Element& aElement, nsIAtom& aAttribute,
const nsAString& aValue,
ChangeStyleTxn::EChangeType aChangeType)
{
RefPtr<ChangeStyleTxn> txn =
new ChangeStyleTxn(aElement, aAttribute, aValue, aChangeType);
return txn.forget();
}
nsresult
nsHTMLCSSUtils::GetSpecifiedProperty(nsINode& aNode, nsIAtom& aProperty,
nsAString& aValue)
{
return GetCSSInlinePropertyBase(&aNode, &aProperty, aValue, eSpecified);
}
nsresult
nsHTMLCSSUtils::GetComputedProperty(nsINode& aNode, nsIAtom& aProperty,
nsAString& aValue)
{
return GetCSSInlinePropertyBase(&aNode, &aProperty, aValue, eComputed);
}
nsresult
nsHTMLCSSUtils::GetCSSInlinePropertyBase(nsINode* aNode, nsIAtom* aProperty,
nsAString& aValue,
StyleType aStyleType)
{
MOZ_ASSERT(aNode && aProperty);
aValue.Truncate();
nsCOMPtr<dom::Element> element = GetElementContainerOrSelf(aNode);
NS_ENSURE_TRUE(element, NS_ERROR_NULL_POINTER);
if (aStyleType == eComputed) {
// Get the all the computed css styles attached to the element node
RefPtr<nsComputedDOMStyle> cssDecl = GetComputedStyle(element);
NS_ENSURE_STATE(cssDecl);
// from these declarations, get the one we want and that one only
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
cssDecl->GetPropertyValue(nsDependentAtomString(aProperty), aValue)));
return NS_OK;
}
MOZ_ASSERT(aStyleType == eSpecified);
RefPtr<css::Declaration> decl = element->GetInlineStyleDeclaration();
if (!decl) {
return NS_OK;
}
nsCSSProperty prop =
nsCSSProps::LookupProperty(nsDependentAtomString(aProperty),
nsCSSProps::eEnabledForAllContent);
MOZ_ASSERT(prop != eCSSProperty_UNKNOWN);
decl->GetValue(prop, aValue);
return NS_OK;
}
already_AddRefed<nsComputedDOMStyle>
nsHTMLCSSUtils::GetComputedStyle(dom::Element* aElement)
{
MOZ_ASSERT(aElement);
nsIDocument* doc = aElement->GetCurrentDoc();
NS_ENSURE_TRUE(doc, nullptr);
nsIPresShell* presShell = doc->GetShell();
NS_ENSURE_TRUE(presShell, nullptr);
RefPtr<nsComputedDOMStyle> style =
NS_NewComputedDOMStyle(aElement, EmptyString(), presShell);
return style.forget();
}
// remove the CSS style "aProperty : aPropertyValue" and possibly remove the whole node
// if it is a span and if its only attribute is _moz_dirty
nsresult
nsHTMLCSSUtils::RemoveCSSInlineStyle(nsIDOMNode *aNode, nsIAtom *aProperty, const nsAString & aPropertyValue)
{
nsCOMPtr<Element> element = do_QueryInterface(aNode);
NS_ENSURE_STATE(element);
// remove the property from the style attribute
nsresult res = RemoveCSSProperty(*element, *aProperty, aPropertyValue);
NS_ENSURE_SUCCESS(res, res);
if (!element->IsHTMLElement(nsGkAtoms::span) ||
nsHTMLEditor::HasAttributes(element)) {
return NS_OK;
}
return mHTMLEditor->RemoveContainer(element);
}
// Answers true if the property can be removed by setting a "none" CSS value
// on a node
bool
nsHTMLCSSUtils::IsCSSInvertible(nsIAtom& aProperty, const nsAString* aAttribute)
{
return nsGkAtoms::b == &aProperty;
}
// Get the default browser background color if we need it for GetCSSBackgroundColorState
void
nsHTMLCSSUtils::GetDefaultBackgroundColor(nsAString & aColor)
{
if (Preferences::GetBool("editor.use_custom_colors", false)) {
nsresult rv = Preferences::GetString("editor.background_color", &aColor);
// XXX Why don't you validate the pref value?
if (NS_FAILED(rv)) {
NS_WARNING("failed to get editor.background_color");
aColor.AssignLiteral("#ffffff"); // Default to white
}
return;
}
if (Preferences::GetBool("browser.display.use_system_colors", false)) {
return;
}
nsresult rv =
Preferences::GetString("browser.display.background_color", &aColor);
// XXX Why don't you validate the pref value?
if (NS_FAILED(rv)) {
NS_WARNING("failed to get browser.display.background_color");
aColor.AssignLiteral("#ffffff"); // Default to white
}
}
// Get the default length unit used for CSS Indent/Outdent
void
nsHTMLCSSUtils::GetDefaultLengthUnit(nsAString & aLengthUnit)
{
nsresult rv =
Preferences::GetString("editor.css.default_length_unit", &aLengthUnit);
// XXX Why don't you validate the pref value?
if (NS_FAILED(rv)) {
aLengthUnit.AssignLiteral("px");
}
}
// Unfortunately, CSSStyleDeclaration::GetPropertyCSSValue is not yet
// implemented... We need then a way to determine the number part and the unit
// from aString, aString being the result of a GetPropertyValue query...
void
nsHTMLCSSUtils::ParseLength(const nsAString& aString, float* aValue,
nsIAtom** aUnit)
{
if (aString.IsEmpty()) {
*aValue = 0;
*aUnit = NS_NewAtom(aString).take();
return;
}
nsAString::const_iterator iter;
aString.BeginReading(iter);
float a = 10.0f , b = 1.0f, value = 0;
int8_t sign = 1;
int32_t i = 0, j = aString.Length();
char16_t c;
bool floatingPointFound = false;
c = *iter;
if (char16_t('-') == c) { sign = -1; iter++; i++; }
else if (char16_t('+') == c) { iter++; i++; }
while (i < j) {
c = *iter;
if ((char16_t('0') == c) ||
(char16_t('1') == c) ||
(char16_t('2') == c) ||
(char16_t('3') == c) ||
(char16_t('4') == c) ||
(char16_t('5') == c) ||
(char16_t('6') == c) ||
(char16_t('7') == c) ||
(char16_t('8') == c) ||
(char16_t('9') == c)) {
value = (value * a) + (b * (c - char16_t('0')));
b = b / 10 * a;
}
else if (!floatingPointFound && (char16_t('.') == c)) {
floatingPointFound = true;
a = 1.0f; b = 0.1f;
}
else break;
iter++;
i++;
}
*aValue = value * sign;
*aUnit = NS_NewAtom(StringTail(aString, j-i)).take();
}
void
nsHTMLCSSUtils::GetCSSPropertyAtom(nsCSSEditableProperty aProperty, nsIAtom ** aAtom)
{
*aAtom = nullptr;
switch (aProperty) {
case eCSSEditableProperty_background_color:
*aAtom = nsGkAtoms::backgroundColor;
break;
case eCSSEditableProperty_background_image:
*aAtom = nsGkAtoms::background_image;
break;
case eCSSEditableProperty_border:
*aAtom = nsGkAtoms::border;
break;
case eCSSEditableProperty_caption_side:
*aAtom = nsGkAtoms::caption_side;
break;
case eCSSEditableProperty_color:
*aAtom = nsGkAtoms::color;
break;
case eCSSEditableProperty_float:
*aAtom = nsGkAtoms::_float;
break;
case eCSSEditableProperty_font_family:
*aAtom = nsGkAtoms::font_family;
break;
case eCSSEditableProperty_font_size:
*aAtom = nsGkAtoms::font_size;
break;
case eCSSEditableProperty_font_style:
*aAtom = nsGkAtoms::font_style;
break;
case eCSSEditableProperty_font_weight:
*aAtom = nsGkAtoms::fontWeight;
break;
case eCSSEditableProperty_height:
*aAtom = nsGkAtoms::height;
break;
case eCSSEditableProperty_list_style_type:
*aAtom = nsGkAtoms::list_style_type;
break;
case eCSSEditableProperty_margin_left:
*aAtom = nsGkAtoms::marginLeft;
break;
case eCSSEditableProperty_margin_right:
*aAtom = nsGkAtoms::marginRight;
break;
case eCSSEditableProperty_text_align:
*aAtom = nsGkAtoms::textAlign;
break;
case eCSSEditableProperty_text_decoration:
*aAtom = nsGkAtoms::text_decoration;
break;
case eCSSEditableProperty_vertical_align:
*aAtom = nsGkAtoms::vertical_align;
break;
case eCSSEditableProperty_whitespace:
*aAtom = nsGkAtoms::white_space;
break;
case eCSSEditableProperty_width:
*aAtom = nsGkAtoms::width;
break;
case eCSSEditableProperty_NONE:
// intentionally empty
break;
}
}
// Populate aProperty and aValueArray with the CSS declarations equivalent to the
// value aValue according to the equivalence table aEquivTable
void
nsHTMLCSSUtils::BuildCSSDeclarations(nsTArray<nsIAtom*> & aPropertyArray,
nsTArray<nsString> & aValueArray,
const CSSEquivTable * aEquivTable,
const nsAString * aValue,
bool aGetOrRemoveRequest)
{
// clear arrays
aPropertyArray.Clear();
aValueArray.Clear();
// if we have an input value, let's use it
nsAutoString value, lowerCasedValue;
if (aValue) {
value.Assign(*aValue);
lowerCasedValue.Assign(*aValue);
ToLowerCase(lowerCasedValue);
}
int8_t index = 0;
nsCSSEditableProperty cssProperty = aEquivTable[index].cssProperty;
while (cssProperty) {
if (!aGetOrRemoveRequest|| aEquivTable[index].gettable) {
nsAutoString cssValue, cssPropertyString;
nsIAtom * cssPropertyAtom;
// find the equivalent css value for the index-th property in
// the equivalence table
(*aEquivTable[index].processValueFunctor) ((!aGetOrRemoveRequest || aEquivTable[index].caseSensitiveValue) ? &value : &lowerCasedValue,
cssValue,
aEquivTable[index].defaultValue,
aEquivTable[index].prependValue,
aEquivTable[index].appendValue);
GetCSSPropertyAtom(cssProperty, &cssPropertyAtom);
aPropertyArray.AppendElement(cssPropertyAtom);
aValueArray.AppendElement(cssValue);
}
index++;
cssProperty = aEquivTable[index].cssProperty;
}
}
// Populate cssPropertyArray and cssValueArray with the declarations equivalent
// to aHTMLProperty/aAttribute/aValue for the node aNode
void
nsHTMLCSSUtils::GenerateCSSDeclarationsFromHTMLStyle(dom::Element* aElement,
nsIAtom* aHTMLProperty,
const nsAString* aAttribute,
const nsAString* aValue,
nsTArray<nsIAtom*>& cssPropertyArray,
nsTArray<nsString>& cssValueArray,
bool aGetOrRemoveRequest)
{
MOZ_ASSERT(aElement);
const nsHTMLCSSUtils::CSSEquivTable* equivTable = nullptr;
if (nsGkAtoms::b == aHTMLProperty) {
equivTable = boldEquivTable;
} else if (nsGkAtoms::i == aHTMLProperty) {
equivTable = italicEquivTable;
} else if (nsGkAtoms::u == aHTMLProperty) {
equivTable = underlineEquivTable;
} else if (nsGkAtoms::strike == aHTMLProperty) {
equivTable = strikeEquivTable;
} else if (nsGkAtoms::tt == aHTMLProperty) {
equivTable = ttEquivTable;
} else if (aAttribute) {
if (nsGkAtoms::font == aHTMLProperty &&
aAttribute->EqualsLiteral("color")) {
equivTable = fontColorEquivTable;
} else if (nsGkAtoms::font == aHTMLProperty &&
aAttribute->EqualsLiteral("face")) {
equivTable = fontFaceEquivTable;
} else if (aAttribute->EqualsLiteral("bgcolor")) {
equivTable = bgcolorEquivTable;
} else if (aAttribute->EqualsLiteral("background")) {
equivTable = backgroundImageEquivTable;
} else if (aAttribute->EqualsLiteral("text")) {
equivTable = textColorEquivTable;
} else if (aAttribute->EqualsLiteral("border")) {
equivTable = borderEquivTable;
} else if (aAttribute->EqualsLiteral("align")) {
if (aElement->IsHTMLElement(nsGkAtoms::table)) {
equivTable = tableAlignEquivTable;
} else if (aElement->IsHTMLElement(nsGkAtoms::hr)) {
equivTable = hrAlignEquivTable;
} else if (aElement->IsAnyOfHTMLElements(nsGkAtoms::legend,
nsGkAtoms::caption)) {
equivTable = captionAlignEquivTable;
} else {
equivTable = textAlignEquivTable;
}
} else if (aAttribute->EqualsLiteral("valign")) {
equivTable = verticalAlignEquivTable;
} else if (aAttribute->EqualsLiteral("nowrap")) {
equivTable = nowrapEquivTable;
} else if (aAttribute->EqualsLiteral("width")) {
equivTable = widthEquivTable;
} else if (aAttribute->EqualsLiteral("height") ||
(aElement->IsHTMLElement(nsGkAtoms::hr) &&
aAttribute->EqualsLiteral("size"))) {
equivTable = heightEquivTable;
} else if (aAttribute->EqualsLiteral("type") &&
aElement->IsAnyOfHTMLElements(nsGkAtoms::ol,
nsGkAtoms::ul,
nsGkAtoms::li)) {
equivTable = listStyleTypeEquivTable;
}
}
if (equivTable) {
BuildCSSDeclarations(cssPropertyArray, cssValueArray, equivTable,
aValue, aGetOrRemoveRequest);
}
}
// Add to aNode the CSS inline style equivalent to HTMLProperty/aAttribute/
// aValue for the node, and return in aCount the number of CSS properties set
// by the call. The dom::Element version returns aCount instead.
int32_t
nsHTMLCSSUtils::SetCSSEquivalentToHTMLStyle(dom::Element* aElement,
nsIAtom* aProperty,
const nsAString* aAttribute,
const nsAString* aValue,
bool aSuppressTransaction)
{
MOZ_ASSERT(aElement && aProperty);
MOZ_ASSERT_IF(aAttribute, aValue);
int32_t count;
// This can only fail if SetCSSProperty fails, which should only happen if
// something is pretty badly wrong. In this case we assert so that hopefully
// someone will notice, but there's nothing more sensible to do than just
// return the count and carry on.
nsresult res = SetCSSEquivalentToHTMLStyle(aElement->AsDOMNode(),
aProperty, aAttribute,
aValue, &count,
aSuppressTransaction);
NS_ASSERTION(NS_SUCCEEDED(res), "SetCSSEquivalentToHTMLStyle failed");
NS_ENSURE_SUCCESS(res, count);
return count;
}
nsresult
nsHTMLCSSUtils::SetCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
nsIAtom *aHTMLProperty,
const nsAString *aAttribute,
const nsAString *aValue,
int32_t * aCount,
bool aSuppressTransaction)
{
nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
*aCount = 0;
if (!element || !IsCSSEditableProperty(element, aHTMLProperty, aAttribute)) {
return NS_OK;
}
// we can apply the styles only if the node is an element and if we have
// an equivalence for the requested HTML style in this implementation
// Find the CSS equivalence to the HTML style
nsTArray<nsIAtom*> cssPropertyArray;
nsTArray<nsString> cssValueArray;
GenerateCSSDeclarationsFromHTMLStyle(element, aHTMLProperty, aAttribute,
aValue, cssPropertyArray, cssValueArray,
false);
// set the individual CSS inline styles
*aCount = cssPropertyArray.Length();
for (int32_t index = 0; index < *aCount; index++) {
nsresult res = SetCSSProperty(*element, *cssPropertyArray[index],
cssValueArray[index], aSuppressTransaction);
NS_ENSURE_SUCCESS(res, res);
}
return NS_OK;
}
// Remove from aNode the CSS inline style equivalent to HTMLProperty/aAttribute/aValue for the node
nsresult
nsHTMLCSSUtils::RemoveCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
nsIAtom *aHTMLProperty,
const nsAString *aAttribute,
const nsAString *aValue,
bool aSuppressTransaction)
{
nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
NS_ENSURE_TRUE(element, NS_OK);
return RemoveCSSEquivalentToHTMLStyle(element, aHTMLProperty, aAttribute,
aValue, aSuppressTransaction);
}
nsresult
nsHTMLCSSUtils::RemoveCSSEquivalentToHTMLStyle(dom::Element* aElement,
nsIAtom* aHTMLProperty,
const nsAString* aAttribute,
const nsAString* aValue,
bool aSuppressTransaction)
{
MOZ_ASSERT(aElement);
if (!IsCSSEditableProperty(aElement, aHTMLProperty, aAttribute)) {
return NS_OK;
}
// we can apply the styles only if the node is an element and if we have
// an equivalence for the requested HTML style in this implementation
// Find the CSS equivalence to the HTML style
nsTArray<nsIAtom*> cssPropertyArray;
nsTArray<nsString> cssValueArray;
GenerateCSSDeclarationsFromHTMLStyle(aElement, aHTMLProperty, aAttribute,
aValue, cssPropertyArray, cssValueArray,
true);
// remove the individual CSS inline styles
int32_t count = cssPropertyArray.Length();
for (int32_t index = 0; index < count; index++) {
nsresult res = RemoveCSSProperty(*aElement,
*cssPropertyArray[index],
cssValueArray[index],
aSuppressTransaction);
NS_ENSURE_SUCCESS(res, res);
}
return NS_OK;
}
// returns in aValueString the list of values for the CSS equivalences to
// the HTML style aHTMLProperty/aAttribute/aValueString for the node aNode;
// the value of aStyleType controls the styles we retrieve : specified or
// computed.
nsresult
nsHTMLCSSUtils::GetCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
nsIAtom *aHTMLProperty,
const nsAString *aAttribute,
nsAString & aValueString,
StyleType aStyleType)
{
aValueString.Truncate();
nsCOMPtr<dom::Element> theElement = GetElementContainerOrSelf(aNode);
NS_ENSURE_TRUE(theElement, NS_ERROR_NULL_POINTER);
if (!theElement || !IsCSSEditableProperty(theElement, aHTMLProperty, aAttribute)) {
return NS_OK;
}
// Yes, the requested HTML style has a CSS equivalence in this implementation
nsTArray<nsIAtom*> cssPropertyArray;
nsTArray<nsString> cssValueArray;
// get the CSS equivalence with last param true indicating we want only the
// "gettable" properties
GenerateCSSDeclarationsFromHTMLStyle(theElement, aHTMLProperty, aAttribute, nullptr,
cssPropertyArray, cssValueArray, true);
int32_t count = cssPropertyArray.Length();
for (int32_t index = 0; index < count; index++) {
nsAutoString valueString;
// retrieve the specified/computed value of the property
nsresult res = GetCSSInlinePropertyBase(theElement, cssPropertyArray[index],
valueString, aStyleType);
NS_ENSURE_SUCCESS(res, res);
// append the value to aValueString (possibly with a leading whitespace)
if (index) {
aValueString.Append(char16_t(' '));
}
aValueString.Append(valueString);
}
return NS_OK;
}
// Does the node aNode (or its parent, if it's not an element node) have a CSS
// style equivalent to the HTML style aHTMLProperty/aHTMLAttribute/valueString?
// The value of aStyleType controls the styles we retrieve: specified or
// computed. The return value aIsSet is true if the CSS styles are set.
//
// The nsIContent variant returns aIsSet instead of using an out parameter, and
// does not modify aValue.
bool
nsHTMLCSSUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
nsIAtom* aProperty,
const nsAString* aAttribute,
const nsAString& aValue,
StyleType aStyleType)
{
// Use aValue as only an in param, not in-out
nsAutoString value(aValue);
return IsCSSEquivalentToHTMLInlineStyleSet(aNode, aProperty, aAttribute,
value, aStyleType);
}
bool
nsHTMLCSSUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
nsIAtom* aProperty,
const nsAString* aAttribute,
nsAString& aValue,
StyleType aStyleType)
{
MOZ_ASSERT(aNode && aProperty);
bool isSet;
nsresult res = IsCSSEquivalentToHTMLInlineStyleSet(aNode->AsDOMNode(),
aProperty, aAttribute,
isSet, aValue, aStyleType);
NS_ENSURE_SUCCESS(res, false);
return isSet;
}
nsresult
nsHTMLCSSUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsIDOMNode *aNode,
nsIAtom *aHTMLProperty,
const nsAString *aHTMLAttribute,
bool& aIsSet,
nsAString& valueString,
StyleType aStyleType)
{
NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER);
nsAutoString htmlValueString(valueString);
aIsSet = false;
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
do {
valueString.Assign(htmlValueString);
// get the value of the CSS equivalent styles
nsresult res = GetCSSEquivalentToHTMLInlineStyleSet(node, aHTMLProperty, aHTMLAttribute,
valueString, aStyleType);
NS_ENSURE_SUCCESS(res, res);
// early way out if we can
if (valueString.IsEmpty()) {
return NS_OK;
}
if (nsGkAtoms::b == aHTMLProperty) {
if (valueString.EqualsLiteral("bold")) {
aIsSet = true;
} else if (valueString.EqualsLiteral("normal")) {
aIsSet = false;
} else if (valueString.EqualsLiteral("bolder")) {
aIsSet = true;
valueString.AssignLiteral("bold");
} else {
int32_t weight = 0;
nsresult errorCode;
nsAutoString value(valueString);
weight = value.ToInteger(&errorCode);
if (400 < weight) {
aIsSet = true;
valueString.AssignLiteral("bold");
} else {
aIsSet = false;
valueString.AssignLiteral("normal");
}
}
} else if (nsGkAtoms::i == aHTMLProperty) {
if (valueString.EqualsLiteral("italic") ||
valueString.EqualsLiteral("oblique")) {
aIsSet = true;
}
} else if (nsGkAtoms::u == aHTMLProperty) {
nsAutoString val;
val.AssignLiteral("underline");
aIsSet = ChangeStyleTxn::ValueIncludes(valueString, val);
} else if (nsGkAtoms::strike == aHTMLProperty) {
nsAutoString val;
val.AssignLiteral("line-through");
aIsSet = ChangeStyleTxn::ValueIncludes(valueString, val);
} else if (aHTMLAttribute &&
((nsGkAtoms::font == aHTMLProperty &&
aHTMLAttribute->EqualsLiteral("color")) ||
aHTMLAttribute->EqualsLiteral("bgcolor"))) {
if (htmlValueString.IsEmpty()) {
aIsSet = true;
} else {
nscolor rgba;
nsAutoString subStr;
htmlValueString.Right(subStr, htmlValueString.Length() - 1);
if (NS_ColorNameToRGB(htmlValueString, &rgba) ||
NS_HexToRGB(subStr, &rgba)) {
nsAutoString htmlColor, tmpStr;
if (NS_GET_A(rgba) != 255) {
// This should only be hit by the "transparent" keyword, which
// currently serializes to "transparent" (not "rgba(0, 0, 0, 0)").
MOZ_ASSERT(NS_GET_R(rgba) == 0 && NS_GET_G(rgba) == 0 &&
NS_GET_B(rgba) == 0 && NS_GET_A(rgba) == 0);
htmlColor.AppendLiteral("transparent");
} else {
htmlColor.AppendLiteral("rgb(");
NS_NAMED_LITERAL_STRING(comma, ", ");
tmpStr.AppendInt(NS_GET_R(rgba), 10);
htmlColor.Append(tmpStr + comma);
tmpStr.Truncate();
tmpStr.AppendInt(NS_GET_G(rgba), 10);
htmlColor.Append(tmpStr + comma);
tmpStr.Truncate();
tmpStr.AppendInt(NS_GET_B(rgba), 10);
htmlColor.Append(tmpStr);
htmlColor.Append(char16_t(')'));
}
aIsSet = htmlColor.Equals(valueString,
nsCaseInsensitiveStringComparator());
} else {
aIsSet = htmlValueString.Equals(valueString,
nsCaseInsensitiveStringComparator());
}
}
} else if (nsGkAtoms::tt == aHTMLProperty) {
aIsSet = StringBeginsWith(valueString, NS_LITERAL_STRING("monospace"));
} else if (nsGkAtoms::font == aHTMLProperty && aHTMLAttribute &&
aHTMLAttribute->EqualsLiteral("face")) {
if (!htmlValueString.IsEmpty()) {
const char16_t commaSpace[] = { char16_t(','), char16_t(' '), 0 };
const char16_t comma[] = { char16_t(','), 0 };
htmlValueString.ReplaceSubstring(commaSpace, comma);
nsAutoString valueStringNorm(valueString);
valueStringNorm.ReplaceSubstring(commaSpace, comma);
aIsSet = htmlValueString.Equals(valueStringNorm,
nsCaseInsensitiveStringComparator());
} else {
aIsSet = true;
}
return NS_OK;
} else if (aHTMLAttribute && aHTMLAttribute->EqualsLiteral("align")) {
aIsSet = true;
} else {
aIsSet = false;
return NS_OK;
}
if (!htmlValueString.IsEmpty() &&
htmlValueString.Equals(valueString,
nsCaseInsensitiveStringComparator())) {
aIsSet = true;
}
if (htmlValueString.EqualsLiteral("-moz-editor-invert-value")) {
aIsSet = !aIsSet;
}
if (nsGkAtoms::u == aHTMLProperty || nsGkAtoms::strike == aHTMLProperty) {
// unfortunately, the value of the text-decoration property is not inherited.
// that means that we have to look at ancestors of node to see if they are underlined
node = node->GetParentElement(); // set to null if it's not a dom element
}
} while ((nsGkAtoms::u == aHTMLProperty ||
nsGkAtoms::strike == aHTMLProperty) && !aIsSet && node);
return NS_OK;
}
void
nsHTMLCSSUtils::SetCSSEnabled(bool aIsCSSPrefChecked)
{
mIsCSSPrefChecked = aIsCSSPrefChecked;
}
bool
nsHTMLCSSUtils::IsCSSPrefChecked()
{
return mIsCSSPrefChecked ;
}
// ElementsSameStyle compares two elements and checks if they have the same
// specified CSS declarations in the STYLE attribute
// The answer is always negative if at least one of them carries an ID or a class
bool
nsHTMLCSSUtils::ElementsSameStyle(nsIDOMNode *aFirstNode, nsIDOMNode *aSecondNode)
{
nsCOMPtr<dom::Element> firstElement = do_QueryInterface(aFirstNode);
nsCOMPtr<dom::Element> secondElement = do_QueryInterface(aSecondNode);
NS_ASSERTION((firstElement && secondElement), "Non element nodes passed to ElementsSameStyle.");
NS_ENSURE_TRUE(firstElement, false);
NS_ENSURE_TRUE(secondElement, false);
return ElementsSameStyle(firstElement, secondElement);
}
bool
nsHTMLCSSUtils::ElementsSameStyle(dom::Element* aFirstElement,
dom::Element* aSecondElement)
{
MOZ_ASSERT(aFirstElement);
MOZ_ASSERT(aSecondElement);
if (aFirstElement->HasAttr(kNameSpaceID_None, nsGkAtoms::id) ||
aSecondElement->HasAttr(kNameSpaceID_None, nsGkAtoms::id)) {
// at least one of the spans carries an ID ; suspect a CSS rule applies to it and
// refuse to merge the nodes
return false;
}
nsAutoString firstClass, secondClass;
bool isFirstClassSet = aFirstElement->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, firstClass);
bool isSecondClassSet = aSecondElement->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, secondClass);
if (isFirstClassSet && isSecondClassSet) {
// both spans carry a class, let's compare them
if (!firstClass.Equals(secondClass)) {
// WARNING : technically, the comparison just above is questionable :
// from a pure HTML/CSS point of view class="a b" is NOT the same than
// class="b a" because a CSS rule could test the exact value of the class
// attribute to be "a b" for instance ; from a user's point of view, a
// wysiwyg editor should probably NOT make any difference. CSS people
// need to discuss this issue before any modification.
return false;
}
} else if (isFirstClassSet || isSecondClassSet) {
// one span only carries a class, early way out
return false;
}
nsCOMPtr<nsIDOMCSSStyleDeclaration> firstCSSDecl, secondCSSDecl;
uint32_t firstLength, secondLength;
nsresult rv = GetInlineStyles(aFirstElement, getter_AddRefs(firstCSSDecl), &firstLength);
if (NS_FAILED(rv) || !firstCSSDecl) {
return false;
}
rv = GetInlineStyles(aSecondElement, getter_AddRefs(secondCSSDecl), &secondLength);
if (NS_FAILED(rv) || !secondCSSDecl) {
return false;
}
if (firstLength != secondLength) {
// early way out if we can
return false;
}
if (!firstLength) {
// no inline style !
return true;
}
nsAutoString propertyNameString;
nsAutoString firstValue, secondValue;
for (uint32_t i = 0; i < firstLength; i++) {
firstCSSDecl->Item(i, propertyNameString);
firstCSSDecl->GetPropertyValue(propertyNameString, firstValue);
secondCSSDecl->GetPropertyValue(propertyNameString, secondValue);
if (!firstValue.Equals(secondValue)) {
return false;
}
}
for (uint32_t i = 0; i < secondLength; i++) {
secondCSSDecl->Item(i, propertyNameString);
secondCSSDecl->GetPropertyValue(propertyNameString, secondValue);
firstCSSDecl->GetPropertyValue(propertyNameString, firstValue);
if (!firstValue.Equals(secondValue)) {
return false;
}
}
return true;
}
nsresult
nsHTMLCSSUtils::GetInlineStyles(dom::Element* aElement,
nsIDOMCSSStyleDeclaration** aCssDecl,
uint32_t* aLength)
{
return GetInlineStyles(static_cast<nsISupports*>(aElement), aCssDecl, aLength);
}
nsresult
nsHTMLCSSUtils::GetInlineStyles(nsIDOMElement* aElement,
nsIDOMCSSStyleDeclaration** aCssDecl,
uint32_t* aLength)
{
return GetInlineStyles(static_cast<nsISupports*>(aElement), aCssDecl, aLength);
}
nsresult
nsHTMLCSSUtils::GetInlineStyles(nsISupports *aElement,
nsIDOMCSSStyleDeclaration **aCssDecl,
uint32_t *aLength)
{
NS_ENSURE_TRUE(aElement && aLength, NS_ERROR_NULL_POINTER);
*aLength = 0;
nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles = do_QueryInterface(aElement);
NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
nsresult res = inlineStyles->GetStyle(aCssDecl);
NS_ENSURE_SUCCESS(res, NS_ERROR_NULL_POINTER);
MOZ_ASSERT(*aCssDecl);
(*aCssDecl)->GetLength(aLength);
return NS_OK;
}
already_AddRefed<nsIDOMElement>
nsHTMLCSSUtils::GetElementContainerOrSelf(nsIDOMNode* aNode)
{
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
NS_ENSURE_TRUE(node, nullptr);
nsCOMPtr<nsIDOMElement> element =
do_QueryInterface(GetElementContainerOrSelf(node));
return element.forget();
}
dom::Element*
nsHTMLCSSUtils::GetElementContainerOrSelf(nsINode* aNode)
{
MOZ_ASSERT(aNode);
if (nsIDOMNode::DOCUMENT_NODE == aNode->NodeType()) {
return nullptr;
}
nsINode* node = aNode;
// Loop until we find an element.
while (node && !node->IsElement()) {
node = node->GetParentNode();
}
NS_ENSURE_TRUE(node, nullptr);
return node->AsElement();
}
nsresult
nsHTMLCSSUtils::SetCSSProperty(nsIDOMElement * aElement,
const nsAString & aProperty,
const nsAString & aValue)
{
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
uint32_t length;
nsresult res = GetInlineStyles(aElement, getter_AddRefs(cssDecl), &length);
if (NS_FAILED(res) || !cssDecl) return res;
return cssDecl->SetProperty(aProperty,
aValue,
EmptyString());
}
nsresult
nsHTMLCSSUtils::SetCSSPropertyPixels(nsIDOMElement * aElement,
const nsAString & aProperty,
int32_t aIntValue)
{
nsAutoString s;
s.AppendInt(aIntValue);
return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"));
}
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