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gecko/editor/libeditor/html/nsHTMLCSSUtils.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Original Author: Daniel Glazman <glazman@netscape.com>
* Ms2ger <ms2ger@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsHTMLEditor.h"
#include "nsCOMPtr.h"
#include "nsHTMLEditUtils.h"
#include "nsEditProperty.h"
#include "ChangeCSSInlineStyleTxn.h"
#include "nsIDOMElement.h"
#include "nsIDOMElementCSSInlineStyle.h"
#include "nsIDOMDocument.h"
#include "nsIContent.h"
#include "nsIAtom.h"
#include "nsTextEditUtils.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsHTMLCSSUtils.h"
#include "nsColor.h"
#include "nsAttrName.h"
#include "nsAutoPtr.h"
#include "mozilla/Preferences.h"
#include "nsContentUtils.h"
using namespace mozilla;
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(PRUnichar('%'))) {
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");
}
}
}
static
void ProcessFontSizeValue(const nsAString* aInputString, nsAString& aOutputString,
const char* aDefaultValueString,
const char* aPrependString, const char* aAppendString)
{
aOutputString.Truncate();
if (aInputString) {
PRInt32 size = nsContentUtils::ParseLegacyFontSize(*aInputString);
switch (size) {
case 0:
// Didn't parse
return;
case 1:
aOutputString.AssignLiteral("x-small");
return;
case 2:
aOutputString.AssignLiteral("small");
return;
case 3:
aOutputString.AssignLiteral("medium");
return;
case 4:
aOutputString.AssignLiteral("large");
return;
case 5:
aOutputString.AssignLiteral("x-large");
return;
case 6:
aOutputString.AssignLiteral("xx-large");
return;
case 7:
// No corresponding CSS size
return;
default:
NS_NOTREACHED("Unexpected return value from ParseLegacyFontSize");
}
}
}
const nsHTMLCSSUtils::CSSEquivTable boldEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_weight, ProcessBValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable italicEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_style, ProcessDefaultValue, "italic", nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable underlineEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue, "underline", nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable strikeEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue, "line-through", nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable ttEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_family, ProcessDefaultValue, "monospace", nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable fontColorEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_color, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable fontFaceEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_family, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable fontSizeEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_font_size, ProcessFontSizeValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable bgcolorEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_background_color, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable backgroundImageEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_background_image, ProcessExtendedValue, nsnull, "url(", ")", true, true },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable textColorEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_color, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable borderEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_border, ProcessExtendedValue, nsnull, nsnull, "px solid", true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable textAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_align, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable captionAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_caption_side, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable verticalAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_vertical_align, ProcessSameValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable nowrapEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_whitespace, ProcessDefaultValue, "nowrap", nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable widthEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_width, ProcessLengthValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable heightEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_height, ProcessLengthValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable listStyleTypeEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_list_style_type, ProcessListStyleTypeValue, nsnull, nsnull, nsnull, true, true },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable tableAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_text_align, ProcessDefaultValue, "left", nsnull, nsnull, false, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
};
const nsHTMLCSSUtils::CSSEquivTable hrAlignEquivTable[] = {
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue, nsnull, nsnull, nsnull, true, false },
{ nsHTMLCSSUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue, nsnull, nsnull, nsnull, 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(nsIDOMNode* aNode,
nsIAtom* aProperty,
const nsAString* aAttribute,
const nsAString* aValue)
{
NS_ASSERTION(aNode, "Shouldn't you pass aNode? - Bug 214025");
nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
NS_ENSURE_TRUE(content, false);
return IsCSSEditableProperty(content, aProperty, aAttribute, aValue);
}
bool
nsHTMLCSSUtils::IsCSSEditableProperty(nsIContent* aNode,
nsIAtom* aProperty,
const nsAString* aAttribute,
const nsAString* aValue)
{
MOZ_ASSERT(aNode);
nsIContent* content = aNode;
// we need an element node here
if (content->NodeType() == nsIDOMNode::TEXT_NODE) {
content = content->GetParent();
NS_ENSURE_TRUE(content, false);
}
nsIAtom *tagName = content->Tag();
// brade: shouldn't some of the above go below the next block?
// html inline styles B I TT U STRIKE and COLOR/FACE on FONT
if (nsEditProperty::b == aProperty
|| nsEditProperty::i == aProperty
|| nsEditProperty::tt == aProperty
|| nsEditProperty::u == aProperty
|| nsEditProperty::strike == aProperty
|| ((nsEditProperty::font == aProperty) && aAttribute &&
(aAttribute->EqualsLiteral("color") ||
aAttribute->EqualsLiteral("face")))) {
return true;
}
// FONT SIZE doesn't work if the value is 7
if (nsEditProperty::font == aProperty && aAttribute &&
aAttribute->EqualsLiteral("size")) {
if (!aValue || aValue->IsEmpty()) {
return true;
}
PRInt32 size = nsContentUtils::ParseLegacyFontSize(*aValue);
return size && size != 7;
}
// ALIGN attribute on elements supporting it
if (aAttribute && (aAttribute->EqualsLiteral("align")) &&
(nsEditProperty::div == tagName
|| nsEditProperty::p == tagName
|| nsEditProperty::h1 == tagName
|| nsEditProperty::h2 == tagName
|| nsEditProperty::h3 == tagName
|| nsEditProperty::h4 == tagName
|| nsEditProperty::h5 == tagName
|| nsEditProperty::h6 == tagName
|| nsEditProperty::td == tagName
|| nsEditProperty::th == tagName
|| nsEditProperty::table == tagName
|| nsEditProperty::hr == tagName
// brade: for the above, why not use nsHTMLEditUtils::SupportsAlignAttr
// brade: but it also checks for tbody, tfoot, thead
// Let's add the following elements here even if ALIGN has not
// the same meaning for them
|| nsEditProperty::legend == tagName
|| nsEditProperty::caption == tagName)) {
return true;
}
if (aAttribute && (aAttribute->EqualsLiteral("valign")) &&
(nsEditProperty::col == tagName
|| nsEditProperty::colgroup == tagName
|| nsEditProperty::tbody == tagName
|| nsEditProperty::td == tagName
|| nsEditProperty::th == tagName
|| nsEditProperty::tfoot == tagName
|| nsEditProperty::thead == tagName
|| nsEditProperty::tr == tagName)) {
return true;
}
// attributes TEXT, BACKGROUND and BGCOLOR on BODY
if (aAttribute && (nsEditProperty::body == tagName) &&
(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 && ((nsEditProperty::td == tagName)
|| (nsEditProperty::th == tagName)) &&
(aAttribute->EqualsLiteral("height")
|| aAttribute->EqualsLiteral("width")
|| aAttribute->EqualsLiteral("nowrap"))) {
return true;
}
// attributes HEIGHT and WIDTH on TABLE
if (aAttribute && (nsEditProperty::table == tagName) &&
(aAttribute->EqualsLiteral("height")
|| aAttribute->EqualsLiteral("width"))) {
return true;
}
// attributes SIZE and WIDTH on HR
if (aAttribute && (nsEditProperty::hr == tagName) &&
(aAttribute->EqualsLiteral("size")
|| aAttribute->EqualsLiteral("width"))) {
return true;
}
// attribute TYPE on OL UL LI
if (aAttribute && (nsEditProperty::ol == tagName
|| nsEditProperty::ul == tagName
|| nsEditProperty::li == tagName) &&
aAttribute->EqualsLiteral("type")) {
return true;
}
if (aAttribute && nsEditProperty::img == tagName &&
(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") &&
(nsEditProperty::ul == tagName
|| nsEditProperty::ol == tagName
|| nsEditProperty::dl == tagName
|| nsEditProperty::li == tagName
|| nsEditProperty::dd == tagName
|| nsEditProperty::dt == tagName
|| nsEditProperty::address == tagName
|| nsEditProperty::pre == tagName
|| nsEditProperty::ul == tagName)) {
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(nsIDOMElement *aElement, nsIAtom * aProperty, const nsAString & aValue,
bool aSuppressTransaction)
{
nsRefPtr<ChangeCSSInlineStyleTxn> txn;
nsresult result = CreateCSSPropertyTxn(aElement, aProperty, aValue,
getter_AddRefs(txn), false);
if (NS_SUCCEEDED(result)) {
if (aSuppressTransaction) {
result = txn->DoTransaction();
}
else {
result = mHTMLEditor->DoTransaction(txn);
}
}
return result;
}
nsresult
nsHTMLCSSUtils::SetCSSPropertyPixels(nsIDOMElement *aElement,
nsIAtom *aProperty,
PRInt32 aIntValue,
bool aSuppressTransaction)
{
nsAutoString s;
s.AppendInt(aIntValue);
return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"),
aSuppressTransaction);
}
// 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(nsIDOMElement *aElement, nsIAtom * aProperty, const nsAString & aValue,
bool aSuppressTransaction)
{
nsRefPtr<ChangeCSSInlineStyleTxn> txn;
nsresult result = CreateCSSPropertyTxn(aElement, aProperty, aValue,
getter_AddRefs(txn), true);
if (NS_SUCCEEDED(result)) {
if (aSuppressTransaction) {
result = txn->DoTransaction();
}
else {
result = mHTMLEditor->DoTransaction(txn);
}
}
return result;
}
nsresult
nsHTMLCSSUtils::CreateCSSPropertyTxn(nsIDOMElement *aElement,
nsIAtom * aAttribute,
const nsAString& aValue,
ChangeCSSInlineStyleTxn ** aTxn,
bool aRemoveProperty)
{
NS_ENSURE_TRUE(aElement, NS_ERROR_NULL_POINTER);
*aTxn = new ChangeCSSInlineStyleTxn();
NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*aTxn);
return (*aTxn)->Init(mHTMLEditor, aElement, aAttribute, aValue, aRemoveProperty);
}
nsresult
nsHTMLCSSUtils::GetSpecifiedProperty(nsIDOMNode *aNode, nsIAtom *aProperty,
nsAString & aValue)
{
return GetCSSInlinePropertyBase(aNode, aProperty, aValue, nsnull, SPECIFIED_STYLE_TYPE);
}
nsresult
nsHTMLCSSUtils::GetComputedProperty(nsIDOMNode *aNode, nsIAtom *aProperty,
nsAString & aValue)
{
nsCOMPtr<nsIDOMWindow> window;
nsresult res = GetDefaultViewCSS(aNode, getter_AddRefs(window));
NS_ENSURE_SUCCESS(res, res);
return GetCSSInlinePropertyBase(aNode, aProperty, aValue, window, COMPUTED_STYLE_TYPE);
}
nsresult
nsHTMLCSSUtils::GetCSSInlinePropertyBase(nsINode* aNode, nsIAtom* aProperty,
nsAString& aValue,
nsIDOMWindow* aWindow,
PRUint8 aStyleType)
{
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode);
return GetCSSInlinePropertyBase(node, aProperty, aValue, aWindow, aStyleType);
}
nsresult
nsHTMLCSSUtils::GetCSSInlinePropertyBase(nsIDOMNode *aNode, nsIAtom *aProperty,
nsAString& aValue,
nsIDOMWindow* aWindow,
PRUint8 aStyleType)
{
aValue.Truncate();
NS_ENSURE_TRUE(aProperty, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMElement> element = GetElementContainerOrSelf(aNode);
NS_ENSURE_TRUE(element, NS_ERROR_NULL_POINTER);
switch (aStyleType) {
case COMPUTED_STYLE_TYPE:
if (element && aWindow) {
nsAutoString value, propString;
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
aProperty->ToString(propString);
// Get the all the computed css styles attached to the element node
nsresult res = aWindow->GetComputedStyle(element, EmptyString(), getter_AddRefs(cssDecl));
if (NS_FAILED(res) || !cssDecl)
return res;
// from these declarations, get the one we want and that one only
res = cssDecl->GetPropertyValue(propString, value);
NS_ENSURE_SUCCESS(res, res);
aValue.Assign(value);
}
break;
case SPECIFIED_STYLE_TYPE:
if (element) {
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
PRUint32 length;
nsresult res = GetInlineStyles(element, getter_AddRefs(cssDecl), &length);
if (NS_FAILED(res) || !cssDecl) return res;
nsAutoString value, propString;
aProperty->ToString(propString);
res = cssDecl->GetPropertyValue(propString, value);
NS_ENSURE_SUCCESS(res, res);
aValue.Assign(value);
}
break;
}
return NS_OK;
}
nsresult
nsHTMLCSSUtils::GetDefaultViewCSS(nsIDOMNode *aNode, nsIDOMWindow **aViewCSS)
{
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER);
return GetDefaultViewCSS(node, aViewCSS);
}
nsresult
nsHTMLCSSUtils::GetDefaultViewCSS(nsINode* aNode, nsIDOMWindow** aViewCSS)
{
MOZ_ASSERT(aNode);
dom::Element* element = GetElementContainerOrSelf(aNode);
NS_ENSURE_TRUE(element, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsIDOMWindow> window = element->OwnerDoc()->GetWindow();
NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
window.forget(aViewCSS);
return NS_OK;
}
// 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<nsIDOMElement> elem = do_QueryInterface(aNode);
// remove the property from the style attribute
nsresult res = RemoveCSSProperty(elem, aProperty, aPropertyValue, false);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
if (!element || !element->IsHTML(nsGkAtoms::span) ||
nsHTMLEditor::HasAttributes(element)) {
return NS_OK;
}
return mHTMLEditor->RemoveContainer(aNode);
}
// Answers true is the property can be removed by setting a "none" CSS value
// on a node
bool
nsHTMLCSSUtils::IsCSSInvertable(nsIAtom *aProperty, const nsAString *aAttribute)
{
return bool(nsEditProperty::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)
{
nsAString::const_iterator iter;
aString.BeginReading(iter);
float a = 10.0f , b = 1.0f, value = 0;
PRInt8 sign = 1;
PRInt32 i = 0, j = aString.Length();
PRUnichar c;
bool floatingPointFound = false;
c = *iter;
if (PRUnichar('-') == c) { sign = -1; iter++; i++; }
else if (PRUnichar('+') == c) { iter++; i++; }
while (i < j) {
c = *iter;
if ((PRUnichar('0') == c) ||
(PRUnichar('1') == c) ||
(PRUnichar('2') == c) ||
(PRUnichar('3') == c) ||
(PRUnichar('4') == c) ||
(PRUnichar('5') == c) ||
(PRUnichar('6') == c) ||
(PRUnichar('7') == c) ||
(PRUnichar('8') == c) ||
(PRUnichar('9') == c)) {
value = (value * a) + (b * (c - PRUnichar('0')));
b = b / 10 * a;
}
else if (!floatingPointFound && (PRUnichar('.') == c)) {
floatingPointFound = true;
a = 1.0f; b = 0.1f;
}
else break;
iter++;
i++;
}
*aValue = value * sign;
*aUnit = NS_NewAtom(StringTail(aString, j-i));
}
void
nsHTMLCSSUtils::GetCSSPropertyAtom(nsCSSEditableProperty aProperty, nsIAtom ** aAtom)
{
*aAtom = nsnull;
switch (aProperty) {
case eCSSEditableProperty_background_color:
*aAtom = nsEditProperty::cssBackgroundColor;
break;
case eCSSEditableProperty_background_image:
*aAtom = nsEditProperty::cssBackgroundImage;
break;
case eCSSEditableProperty_border:
*aAtom = nsEditProperty::cssBorder;
break;
case eCSSEditableProperty_caption_side:
*aAtom = nsEditProperty::cssCaptionSide;
break;
case eCSSEditableProperty_color:
*aAtom = nsEditProperty::cssColor;
break;
case eCSSEditableProperty_float:
*aAtom = nsEditProperty::cssFloat;
break;
case eCSSEditableProperty_font_family:
*aAtom = nsEditProperty::cssFontFamily;
break;
case eCSSEditableProperty_font_size:
*aAtom = nsEditProperty::cssFontSize;
break;
case eCSSEditableProperty_font_style:
*aAtom = nsEditProperty::cssFontStyle;
break;
case eCSSEditableProperty_font_weight:
*aAtom = nsEditProperty::cssFontWeight;
break;
case eCSSEditableProperty_height:
*aAtom = nsEditProperty::cssHeight;
break;
case eCSSEditableProperty_list_style_type:
*aAtom = nsEditProperty::cssListStyleType;
break;
case eCSSEditableProperty_margin_left:
*aAtom = nsEditProperty::cssMarginLeft;
break;
case eCSSEditableProperty_margin_right:
*aAtom = nsEditProperty::cssMarginRight;
break;
case eCSSEditableProperty_text_align:
*aAtom = nsEditProperty::cssTextAlign;
break;
case eCSSEditableProperty_text_decoration:
*aAtom = nsEditProperty::cssTextDecoration;
break;
case eCSSEditableProperty_vertical_align:
*aAtom = nsEditProperty::cssVerticalAlign;
break;
case eCSSEditableProperty_whitespace:
*aAtom = nsEditProperty::cssWhitespace;
break;
case eCSSEditableProperty_width:
*aAtom = nsEditProperty::cssWidth;
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);
}
PRInt8 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);
nsIAtom* tagName = aElement->Tag();
const nsHTMLCSSUtils::CSSEquivTable* equivTable = nsnull;
if (nsEditProperty::b == aHTMLProperty) {
equivTable = boldEquivTable;
} else if (nsEditProperty::i == aHTMLProperty) {
equivTable = italicEquivTable;
} else if (nsEditProperty::u == aHTMLProperty) {
equivTable = underlineEquivTable;
} else if (nsEditProperty::strike == aHTMLProperty) {
equivTable = strikeEquivTable;
} else if (nsEditProperty::tt == aHTMLProperty) {
equivTable = ttEquivTable;
} else if (aAttribute) {
if (nsEditProperty::font == aHTMLProperty &&
aAttribute->EqualsLiteral("color")) {
equivTable = fontColorEquivTable;
} else if (nsEditProperty::font == aHTMLProperty &&
aAttribute->EqualsLiteral("face")) {
equivTable = fontFaceEquivTable;
} else if (nsEditProperty::font == aHTMLProperty &&
aAttribute->EqualsLiteral("size")) {
equivTable = fontSizeEquivTable;
} 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 (nsEditProperty::table == tagName) {
equivTable = tableAlignEquivTable;
} else if (nsEditProperty::hr == tagName) {
equivTable = hrAlignEquivTable;
} else if (nsEditProperty::legend == tagName ||
nsEditProperty::caption == tagName) {
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") ||
(nsEditProperty::hr == tagName &&
aAttribute->EqualsLiteral("size"))) {
equivTable = heightEquivTable;
} else if (aAttribute->EqualsLiteral("type") &&
(nsEditProperty::ol == tagName
|| nsEditProperty::ul == tagName
|| nsEditProperty::li == tagName)) {
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
nsresult
nsHTMLCSSUtils::SetCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
nsIAtom *aHTMLProperty,
const nsAString *aAttribute,
const nsAString *aValue,
PRInt32 * aCount,
bool aSuppressTransaction)
{
nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
*aCount = 0;
if (!element || !IsCSSEditableProperty(element, aHTMLProperty,
aAttribute, aValue)) {
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);
nsCOMPtr<nsIDOMElement> domElement = do_QueryInterface(element);
// set the individual CSS inline styles
*aCount = cssPropertyArray.Length();
for (PRInt32 index = 0; index < *aCount; index++) {
nsresult res = SetCSSProperty(domElement, 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);
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,
true);
nsCOMPtr<nsIDOMElement> domElement = do_QueryInterface(element);
// remove the individual CSS inline styles
PRInt32 count = cssPropertyArray.Length();
for (PRInt32 index = 0; index < count; index++) {
nsresult res = RemoveCSSProperty(domElement,
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,
PRUint8 aStyleType)
{
aValueString.Truncate();
nsCOMPtr<dom::Element> theElement = GetElementContainerOrSelf(aNode);
NS_ENSURE_TRUE(theElement, NS_ERROR_NULL_POINTER);
if (!theElement || !IsCSSEditableProperty(theElement, aHTMLProperty,
aAttribute, &aValueString)) {
return NS_OK;
}
// Yes, the requested HTML style has a CSS equivalence in this implementation
// Retrieve the default ViewCSS if we are asked for computed styles
nsCOMPtr<nsIDOMWindow> window;
if (COMPUTED_STYLE_TYPE == aStyleType) {
nsresult res = GetDefaultViewCSS(theElement, getter_AddRefs(window));
NS_ENSURE_SUCCESS(res, res);
}
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, nsnull,
cssPropertyArray, cssValueArray, true);
PRInt32 count = cssPropertyArray.Length();
for (PRInt32 index = 0; index < count; index++) {
nsAutoString valueString;
// retrieve the specified/computed value of the property
nsresult res = GetCSSInlinePropertyBase(theElement, cssPropertyArray[index],
valueString, window, aStyleType);
NS_ENSURE_SUCCESS(res, res);
// append the value to aValueString (possibly with a leading whitespace)
if (index) {
aValueString.Append(PRUnichar(' '));
}
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.
nsresult
nsHTMLCSSUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsIDOMNode *aNode,
nsIAtom *aHTMLProperty,
const nsAString *aHTMLAttribute,
bool& aIsSet,
nsAString& valueString,
PRUint8 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 (nsEditProperty::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 {
PRInt32 weight = 0;
PRInt32 errorCode;
nsAutoString value(valueString);
weight = value.ToInteger(&errorCode, 10);
if (400 < weight) {
aIsSet = true;
valueString.AssignLiteral("bold");
} else {
aIsSet = false;
valueString.AssignLiteral("normal");
}
}
} else if (nsEditProperty::i == aHTMLProperty) {
if (valueString.EqualsLiteral("italic") ||
valueString.EqualsLiteral("oblique")) {
aIsSet = true;
}
} else if (nsEditProperty::u == aHTMLProperty) {
nsAutoString val;
val.AssignLiteral("underline");
aIsSet = bool(ChangeCSSInlineStyleTxn::ValueIncludes(valueString, val, false));
} else if (nsEditProperty::strike == aHTMLProperty) {
nsAutoString val;
val.AssignLiteral("line-through");
aIsSet = bool(ChangeCSSInlineStyleTxn::ValueIncludes(valueString, val, false));
} else if (aHTMLAttribute &&
((nsEditProperty::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;
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(PRUnichar(')'));
aIsSet = htmlColor.Equals(valueString,
nsCaseInsensitiveStringComparator());
} else {
aIsSet = htmlValueString.Equals(valueString,
nsCaseInsensitiveStringComparator());
}
}
} else if (nsEditProperty::tt == aHTMLProperty) {
aIsSet = StringBeginsWith(valueString, NS_LITERAL_STRING("monospace"));
} else if (nsEditProperty::font == aHTMLProperty && aHTMLAttribute &&
aHTMLAttribute->EqualsLiteral("face")) {
if (!htmlValueString.IsEmpty()) {
const PRUnichar commaSpace[] = { PRUnichar(','), PRUnichar(' '), 0 };
const PRUnichar comma[] = { PRUnichar(','), 0 };
htmlValueString.ReplaceSubstring(commaSpace, comma);
nsAutoString valueStringNorm(valueString);
valueStringNorm.ReplaceSubstring(commaSpace, comma);
aIsSet = htmlValueString.Equals(valueStringNorm,
nsCaseInsensitiveStringComparator());
} else {
// ignore this, it's TT or our default
nsAutoString valueStringLower;
ToLowerCase(valueString, valueStringLower);
aIsSet = !valueStringLower.EqualsLiteral("monospace") &&
!valueStringLower.EqualsLiteral("serif");
}
return NS_OK;
} else if (nsEditProperty::font == aHTMLProperty && aHTMLAttribute &&
aHTMLAttribute->EqualsLiteral("size")) {
if (htmlValueString.IsEmpty()) {
aIsSet = true;
} else {
PRInt32 size = nsContentUtils::ParseLegacyFontSize(htmlValueString);
aIsSet = (size == 1 && valueString.EqualsLiteral("x-small")) ||
(size == 2 && valueString.EqualsLiteral("small")) ||
(size == 3 && valueString.EqualsLiteral("medium")) ||
(size == 4 && valueString.EqualsLiteral("large")) ||
(size == 5 && valueString.EqualsLiteral("x-large")) ||
(size == 6 && valueString.EqualsLiteral("xx-large"));
}
} else if (aHTMLAttribute && aHTMLAttribute->EqualsLiteral("align")) {
aIsSet = true;
} else {
aIsSet = false;
return NS_OK;
}
if (!htmlValueString.IsEmpty() &&
htmlValueString.Equals(valueString,
nsCaseInsensitiveStringComparator())) {
aIsSet = true;
}
if (nsEditProperty::u == aHTMLProperty || nsEditProperty::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->GetElementParent(); // set to null if it's not a dom element
}
} while ((nsEditProperty::u == aHTMLProperty || nsEditProperty::strike == aHTMLProperty) &&
!aIsSet && node);
return NS_OK;
}
nsresult
nsHTMLCSSUtils::SetCSSEnabled(bool aIsCSSPrefChecked)
{
mIsCSSPrefChecked = aIsCSSPrefChecked;
return NS_OK;
}
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)
{
nsresult res;
nsCOMPtr<nsIDOMElement> firstElement = do_QueryInterface(aFirstNode);
nsCOMPtr<nsIDOMElement> secondElement = do_QueryInterface(aSecondNode);
NS_ASSERTION((firstElement && secondElement), "Non element nodes passed to ElementsSameStyle.");
nsAutoString firstID, secondID;
bool isFirstIDSet, isSecondIDSet;
res = mHTMLEditor->GetAttributeValue(firstElement, NS_LITERAL_STRING("id"), firstID, &isFirstIDSet);
res = mHTMLEditor->GetAttributeValue(secondElement, NS_LITERAL_STRING("id"), secondID, &isSecondIDSet);
if (isFirstIDSet || isSecondIDSet) {
// 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, isSecondClassSet;
res = mHTMLEditor->GetAttributeValue(firstElement, NS_LITERAL_STRING("class"), firstClass, &isFirstClassSet);
res = mHTMLEditor->GetAttributeValue(secondElement, NS_LITERAL_STRING("class"), secondClass, &isSecondClassSet);
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;
PRUint32 firstLength, secondLength;
res = GetInlineStyles(firstElement, getter_AddRefs(firstCSSDecl), &firstLength);
if (NS_FAILED(res) || !firstCSSDecl) return false;
res = GetInlineStyles(secondElement, getter_AddRefs(secondCSSDecl), &secondLength);
if (NS_FAILED(res) || !secondCSSDecl) return false;
if (firstLength != secondLength) {
// early way out if we can
return false;
}
else if (0 == firstLength) {
// no inline style !
return true;
}
PRUint32 i;
nsAutoString propertyNameString;
nsAutoString firstValue, secondValue;
for (i=0; i<firstLength; i++) {
firstCSSDecl->Item(i, propertyNameString);
firstCSSDecl->GetPropertyValue(propertyNameString, firstValue);
secondCSSDecl->GetPropertyValue(propertyNameString, secondValue);
if (!firstValue.Equals(secondValue)) {
return false;
}
}
for (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(nsIDOMElement *aElement,
nsIDOMCSSStyleDeclaration **aCssDecl,
PRUint32 *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);
if (NS_FAILED(res) || !aCssDecl) return NS_ERROR_NULL_POINTER;
(*aCssDecl)->GetLength(aLength);
return NS_OK;
}
already_AddRefed<nsIDOMElement>
nsHTMLCSSUtils::GetElementContainerOrSelf(nsIDOMNode* aNode)
{
nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
NS_ENSURE_TRUE(node, nsnull);
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 nsnull;
}
nsINode* node = aNode;
// Loop until we find an element.
while (node && !node->IsElement()) {
node = node->GetNodeParent();
}
NS_ENSURE_TRUE(node, nsnull);
return node->AsElement();
}
nsresult
nsHTMLCSSUtils::SetCSSProperty(nsIDOMElement * aElement,
const nsAString & aProperty,
const nsAString & aValue)
{
nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
PRUint32 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,
PRInt32 aIntValue)
{
nsAutoString s;
s.AppendInt(aIntValue);
return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"));
}
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