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gecko-dev/editor/libeditor/CSSEditUtils.cpp

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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 "mozilla/CSSEditUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/ChangeStyleTransaction.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/Preferences.h"
#include "mozilla/DeclarationBlock.h"
#include "mozilla/dom/Element.h"
#include "mozilla/mozalloc.h"
#include "nsAString.h"
#include "nsCOMPtr.h"
#include "nsCSSProps.h"
#include "nsColor.h"
#include "nsComputedDOMStyle.h"
#include "nsDebug.h"
#include "nsDependentSubstring.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsAtom.h"
#include "nsIContent.h"
#include "nsICSSDeclaration.h"
#include "mozilla/dom/Document.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 "nsStyledElement.h"
#include "nsUnicharUtils.h"
namespace mozilla {
using namespace 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(MakeStringSpan(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(MakeStringSpan(aPrependString), aOutputString);
}
aOutputString.Append(*aInputString);
if (aAppendString) {
AppendASCIItoUTF16(MakeStringSpan(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 CSSEditUtils::CSSEquivTable boldEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_font_weight, ProcessBValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable italicEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_font_style, ProcessDefaultValue,
"italic", nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable underlineEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue,
"underline", nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable strikeEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue,
"line-through", nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable ttEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_font_family, ProcessDefaultValue,
"monospace", nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable fontColorEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_color, ProcessSameValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable fontFaceEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_font_family, ProcessSameValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable bgcolorEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_background_color, ProcessSameValue,
nullptr, nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable backgroundImageEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_background_image, ProcessExtendedValue,
nullptr, "url(", ")", true, true},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable textColorEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_color, ProcessSameValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable borderEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_border, ProcessExtendedValue, nullptr,
nullptr, "px solid", true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable textAlignEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_text_align, ProcessSameValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable captionAlignEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_caption_side, ProcessSameValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable verticalAlignEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_vertical_align, ProcessSameValue,
nullptr, nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable nowrapEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_whitespace, ProcessDefaultValue,
"nowrap", nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable widthEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_width, ProcessLengthValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable heightEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_height, ProcessLengthValue, nullptr,
nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable listStyleTypeEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_list_style_type,
ProcessListStyleTypeValue, nullptr, nullptr, nullptr, true, true},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable tableAlignEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_text_align, ProcessDefaultValue, "left",
nullptr, nullptr, false, false},
{CSSEditUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue,
nullptr, nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue,
nullptr, nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
const CSSEditUtils::CSSEquivTable hrAlignEquivTable[] = {
{CSSEditUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue,
nullptr, nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue,
nullptr, nullptr, nullptr, true, false},
{CSSEditUtils::eCSSEditableProperty_NONE, 0}};
CSSEditUtils::CSSEditUtils(HTMLEditor* aHTMLEditor)
: mHTMLEditor(aHTMLEditor), mIsCSSPrefChecked(true) {
// let's retrieve the value of the "CSS editing" pref
mIsCSSPrefChecked = Preferences::GetBool("editor.use_css", mIsCSSPrefChecked);
}
CSSEditUtils::~CSSEditUtils() {}
// Answers true if we have some CSS equivalence for the HTML style defined
// by aProperty and/or aAttribute for the node aNode
// static
bool CSSEditUtils::IsCSSEditableProperty(nsINode* aNode, nsAtom* aProperty,
nsAtom* aAttribute) {
MOZ_ASSERT(aNode);
nsINode* node = aNode;
// we need an element node here
if (node->NodeType() == nsINode::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 == nsGkAtoms::color || aAttribute == nsGkAtoms::face))) {
return true;
}
// ALIGN attribute on elements supporting it
if (aAttribute == nsGkAtoms::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
// HTMLEditUtils::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 == nsGkAtoms::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 (node->IsHTMLElement(nsGkAtoms::body) &&
(aAttribute == nsGkAtoms::text || aAttribute == nsGkAtoms::background ||
aAttribute == nsGkAtoms::bgcolor)) {
return true;
}
// attribute BGCOLOR on other elements
if (aAttribute == nsGkAtoms::bgcolor) {
return true;
}
// attributes HEIGHT, WIDTH and NOWRAP on TD and TH
if (node->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th) &&
(aAttribute == nsGkAtoms::height || aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::nowrap)) {
return true;
}
// attributes HEIGHT and WIDTH on TABLE
if (node->IsHTMLElement(nsGkAtoms::table) &&
(aAttribute == nsGkAtoms::height || aAttribute == nsGkAtoms::width)) {
return true;
}
// attributes SIZE and WIDTH on HR
if (node->IsHTMLElement(nsGkAtoms::hr) &&
(aAttribute == nsGkAtoms::size || aAttribute == nsGkAtoms::width)) {
return true;
}
// attribute TYPE on OL UL LI
if (node->IsAnyOfHTMLElements(nsGkAtoms::ol, nsGkAtoms::ul, nsGkAtoms::li) &&
aAttribute == nsGkAtoms::type) {
return true;
}
if (node->IsHTMLElement(nsGkAtoms::img) &&
(aAttribute == nsGkAtoms::border || aAttribute == nsGkAtoms::width ||
aAttribute == nsGkAtoms::height)) {
return true;
}
// other elements that we can align using CSS even if they
// can't carry the html ALIGN attribute
if (aAttribute == nsGkAtoms::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 CSSEditUtils::SetCSSProperty(Element& aElement, nsAtom& aProperty,
const nsAString& aValue,
bool aSuppressTxn) {
RefPtr<ChangeStyleTransaction> transaction =
ChangeStyleTransaction::Create(aElement, aProperty, aValue);
if (aSuppressTxn) {
return transaction->DoTransaction();
}
if (NS_WARN_IF(!mHTMLEditor)) {
return NS_ERROR_NOT_AVAILABLE;
}
RefPtr<HTMLEditor> htmlEditor(mHTMLEditor);
return htmlEditor->DoTransactionInternal(transaction);
}
nsresult CSSEditUtils::SetCSSPropertyPixels(Element& aElement,
nsAtom& 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 CSSEditUtils::RemoveCSSProperty(Element& aElement, nsAtom& aProperty,
const nsAString& aValue,
bool aSuppressTxn) {
RefPtr<ChangeStyleTransaction> transaction =
ChangeStyleTransaction::CreateToRemove(aElement, aProperty, aValue);
if (aSuppressTxn) {
return transaction->DoTransaction();
}
if (NS_WARN_IF(!mHTMLEditor)) {
return NS_ERROR_NOT_AVAILABLE;
}
RefPtr<HTMLEditor> htmlEditor(mHTMLEditor);
return htmlEditor->DoTransactionInternal(transaction);
}
// static
nsresult CSSEditUtils::GetSpecifiedProperty(nsINode& aNode, nsAtom& aProperty,
nsAString& aValue) {
return GetCSSInlinePropertyBase(&aNode, &aProperty, aValue, eSpecified);
}
// static
nsresult CSSEditUtils::GetComputedProperty(nsINode& aNode, nsAtom& aProperty,
nsAString& aValue) {
return GetCSSInlinePropertyBase(&aNode, &aProperty, aValue, eComputed);
}
// static
nsresult CSSEditUtils::GetCSSInlinePropertyBase(nsINode* aNode,
nsAtom* aProperty,
nsAString& aValue,
StyleType aStyleType) {
MOZ_ASSERT(aNode && aProperty);
aValue.Truncate();
nsCOMPtr<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_SUCCEEDS(
cssDecl->GetPropertyValue(nsDependentAtomString(aProperty), aValue));
return NS_OK;
}
MOZ_ASSERT(aStyleType == eSpecified);
RefPtr<DeclarationBlock> decl = element->GetInlineStyleDeclaration();
if (!decl) {
return NS_OK;
}
nsCSSPropertyID prop =
nsCSSProps::LookupProperty(nsDependentAtomString(aProperty));
MOZ_ASSERT(prop != eCSSProperty_UNKNOWN);
decl->GetPropertyValueByID(prop, aValue);
return NS_OK;
}
// static
already_AddRefed<nsComputedDOMStyle> CSSEditUtils::GetComputedStyle(
Element* aElement) {
MOZ_ASSERT(aElement);
Document* doc = aElement->GetComposedDoc();
NS_ENSURE_TRUE(doc, nullptr);
RefPtr<nsComputedDOMStyle> style =
NS_NewComputedDOMStyle(aElement, EmptyString(), doc);
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 CSSEditUtils::RemoveCSSInlineStyle(nsINode& aNode, nsAtom* aProperty,
const nsAString& aPropertyValue) {
OwningNonNull<Element> element(*aNode.AsElement());
// remove the property from the style attribute
nsresult rv = RemoveCSSProperty(element, *aProperty, aPropertyValue);
NS_ENSURE_SUCCESS(rv, rv);
if (!element->IsHTMLElement(nsGkAtoms::span) ||
HTMLEditor::HasAttributes(element)) {
return NS_OK;
}
OwningNonNull<HTMLEditor> htmlEditor(*mHTMLEditor);
return htmlEditor->RemoveContainerWithTransaction(element);
}
// Answers true if the property can be removed by setting a "none" CSS value
// on a node
// static
bool CSSEditUtils::IsCSSInvertible(nsAtom& aProperty, nsAtom* aAttribute) {
return nsGkAtoms::b == &aProperty;
}
// Get the default browser background color if we need it for
// GetCSSBackgroundColorState
// static
void CSSEditUtils::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
// static
void CSSEditUtils::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");
}
}
// static
void CSSEditUtils::ParseLength(const nsAString& aString, float* aValue,
nsAtom** aUnit) {
if (aString.IsEmpty()) {
*aValue = 0;
*aUnit = NS_Atomize(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_Atomize(StringTail(aString, j - i)).take();
}
// static
void CSSEditUtils::GetCSSPropertyAtom(nsCSSEditableProperty aProperty,
nsAtom** 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
// static
void CSSEditUtils::BuildCSSDeclarations(nsTArray<nsAtom*>& 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;
nsAtom* 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
// static
void CSSEditUtils::GenerateCSSDeclarationsFromHTMLStyle(
Element* aElement, nsAtom* aHTMLProperty, nsAtom* aAttribute,
const nsAString* aValue, nsTArray<nsAtom*>& cssPropertyArray,
nsTArray<nsString>& cssValueArray, bool aGetOrRemoveRequest) {
MOZ_ASSERT(aElement);
const CSSEditUtils::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 == nsGkAtoms::color) {
equivTable = fontColorEquivTable;
} else if (nsGkAtoms::font == aHTMLProperty &&
aAttribute == nsGkAtoms::face) {
equivTable = fontFaceEquivTable;
} else if (aAttribute == nsGkAtoms::bgcolor) {
equivTable = bgcolorEquivTable;
} else if (aAttribute == nsGkAtoms::background) {
equivTable = backgroundImageEquivTable;
} else if (aAttribute == nsGkAtoms::text) {
equivTable = textColorEquivTable;
} else if (aAttribute == nsGkAtoms::border) {
equivTable = borderEquivTable;
} else if (aAttribute == nsGkAtoms::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 == nsGkAtoms::valign) {
equivTable = verticalAlignEquivTable;
} else if (aAttribute == nsGkAtoms::nowrap) {
equivTable = nowrapEquivTable;
} else if (aAttribute == nsGkAtoms::width) {
equivTable = widthEquivTable;
} else if (aAttribute == nsGkAtoms::height ||
(aElement->IsHTMLElement(nsGkAtoms::hr) &&
aAttribute == nsGkAtoms::size)) {
equivTable = heightEquivTable;
} else if (aAttribute == nsGkAtoms::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 Element version returns aCount instead.
int32_t CSSEditUtils::SetCSSEquivalentToHTMLStyle(Element* aElement,
nsAtom* aHTMLProperty,
nsAtom* aAttribute,
const nsAString* aValue,
bool aSuppressTransaction) {
MOZ_ASSERT(aElement);
if (!IsCSSEditableProperty(aElement, aHTMLProperty, aAttribute)) {
return 0;
}
// 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<nsAtom*> cssPropertyArray;
nsTArray<nsString> cssValueArray;
GenerateCSSDeclarationsFromHTMLStyle(aElement, aHTMLProperty, aAttribute,
aValue, cssPropertyArray, cssValueArray,
false);
// set the individual CSS inline styles
size_t count = cssPropertyArray.Length();
for (size_t index = 0; index < count; index++) {
nsresult rv =
SetCSSProperty(*aElement, MOZ_KnownLive(*cssPropertyArray[index]),
cssValueArray[index], aSuppressTransaction);
if (NS_WARN_IF(NS_FAILED(rv))) {
return 0;
}
}
return count;
}
// Remove from aNode the CSS inline style equivalent to
// HTMLProperty/aAttribute/aValue for the node
nsresult CSSEditUtils::RemoveCSSEquivalentToHTMLStyle(
Element* aElement, nsAtom* aHTMLProperty, nsAtom* aAttribute,
const nsAString* aValue, bool aSuppressTransaction) {
if (NS_WARN_IF(!aElement)) {
return NS_OK;
}
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<nsAtom*> 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 rv =
RemoveCSSProperty(*aElement, MOZ_KnownLive(*cssPropertyArray[index]),
cssValueArray[index], aSuppressTransaction);
NS_ENSURE_SUCCESS(rv, rv);
}
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.
// static
nsresult CSSEditUtils::GetCSSEquivalentToHTMLInlineStyleSet(
nsINode* aNode, nsAtom* aHTMLProperty, nsAtom* aAttribute,
nsAString& aValueString, StyleType aStyleType) {
aValueString.Truncate();
nsCOMPtr<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<nsAtom*> 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 rv = GetCSSInlinePropertyBase(theElement, cssPropertyArray[index],
valueString, aStyleType);
NS_ENSURE_SUCCESS(rv, rv);
// 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.
// static
bool CSSEditUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
nsAtom* aProperty,
nsAtom* 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);
}
// static
bool CSSEditUtils::IsCSSEquivalentToHTMLInlineStyleSet(
nsINode* aNode, nsAtom* aProperty, const nsAString* aAttribute,
nsAString& aValue, StyleType aStyleType) {
MOZ_ASSERT(aNode && aProperty);
RefPtr<nsAtom> attribute = aAttribute ? NS_Atomize(*aAttribute) : nullptr;
return IsCSSEquivalentToHTMLInlineStyleSet(aNode, aProperty, attribute,
aValue, aStyleType);
}
// static
bool CSSEditUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
nsAtom* aHTMLProperty,
nsAtom* aHTMLAttribute,
nsAString& valueString,
StyleType aStyleType) {
NS_ENSURE_TRUE(aNode, false);
nsAutoString htmlValueString(valueString);
bool isSet = false;
do {
valueString.Assign(htmlValueString);
// get the value of the CSS equivalent styles
nsresult rv = GetCSSEquivalentToHTMLInlineStyleSet(
aNode, aHTMLProperty, aHTMLAttribute, valueString, aStyleType);
NS_ENSURE_SUCCESS(rv, false);
// early way out if we can
if (valueString.IsEmpty()) {
return isSet;
}
if (nsGkAtoms::b == aHTMLProperty) {
if (valueString.EqualsLiteral("bold")) {
isSet = true;
} else if (valueString.EqualsLiteral("normal")) {
isSet = false;
} else if (valueString.EqualsLiteral("bolder")) {
isSet = true;
valueString.AssignLiteral("bold");
} else {
int32_t weight = 0;
nsresult errorCode;
nsAutoString value(valueString);
weight = value.ToInteger(&errorCode);
if (400 < weight) {
isSet = true;
valueString.AssignLiteral("bold");
} else {
isSet = false;
valueString.AssignLiteral("normal");
}
}
} else if (nsGkAtoms::i == aHTMLProperty) {
if (valueString.EqualsLiteral("italic") ||
valueString.EqualsLiteral("oblique")) {
isSet = true;
}
} else if (nsGkAtoms::u == aHTMLProperty) {
nsAutoString val;
val.AssignLiteral("underline");
isSet = ChangeStyleTransaction::ValueIncludes(valueString, val);
} else if (nsGkAtoms::strike == aHTMLProperty) {
nsAutoString val;
val.AssignLiteral("line-through");
isSet = ChangeStyleTransaction::ValueIncludes(valueString, val);
} else if ((nsGkAtoms::font == aHTMLProperty &&
aHTMLAttribute == nsGkAtoms::color) ||
aHTMLAttribute == nsGkAtoms::bgcolor) {
if (htmlValueString.IsEmpty()) {
isSet = true;
} else {
nscolor rgba;
nsAutoString subStr;
htmlValueString.Right(subStr, htmlValueString.Length() - 1);
if (NS_ColorNameToRGB(htmlValueString, &rgba) ||
NS_HexToRGBA(subStr, nsHexColorType::NoAlpha, &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(')'));
}
isSet = htmlColor.Equals(valueString,
nsCaseInsensitiveStringComparator());
} else {
isSet = htmlValueString.Equals(valueString,
nsCaseInsensitiveStringComparator());
}
}
} else if (nsGkAtoms::tt == aHTMLProperty) {
isSet = StringBeginsWith(valueString, NS_LITERAL_STRING("monospace"));
} else if (nsGkAtoms::font == aHTMLProperty && aHTMLAttribute &&
aHTMLAttribute == nsGkAtoms::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);
isSet = htmlValueString.Equals(valueStringNorm,
nsCaseInsensitiveStringComparator());
} else {
isSet = true;
}
return isSet;
} else if (aHTMLAttribute == nsGkAtoms::align) {
isSet = true;
} else {
return false;
}
if (!htmlValueString.IsEmpty() &&
htmlValueString.Equals(valueString,
nsCaseInsensitiveStringComparator())) {
isSet = true;
}
if (htmlValueString.EqualsLiteral("-moz-editor-invert-value")) {
isSet = !isSet;
}
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
aNode =
aNode->GetParentElement(); // set to null if it's not a dom element
}
} while (
(nsGkAtoms::u == aHTMLProperty || nsGkAtoms::strike == aHTMLProperty) &&
!isSet && aNode);
return isSet;
}
bool CSSEditUtils::HaveCSSEquivalentStyles(nsINode& aNode,
nsAtom* aHTMLProperty,
nsAtom* aHTMLAttribute,
StyleType aStyleType) {
nsAutoString valueString;
nsCOMPtr<nsINode> node = &aNode;
do {
// get the value of the CSS equivalent styles
nsresult rv = GetCSSEquivalentToHTMLInlineStyleSet(
node, aHTMLProperty, aHTMLAttribute, valueString, aStyleType);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
if (!valueString.IsEmpty()) {
return true;
}
if (nsGkAtoms::u != aHTMLProperty && nsGkAtoms::strike != aHTMLProperty) {
return false;
}
// 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
// set to null if it's not a dom element
node = node->GetParentElement();
} while (node);
return false;
}
void CSSEditUtils::SetCSSEnabled(bool aIsCSSPrefChecked) {
mIsCSSPrefChecked = aIsCSSPrefChecked;
}
bool CSSEditUtils::IsCSSPrefChecked() const { 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
// static
bool CSSEditUtils::ElementsSameStyle(Element* aFirstElement,
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<nsICSSDeclaration> 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;
}
// static
nsresult CSSEditUtils::GetInlineStyles(Element* aElement,
nsICSSDeclaration** aCssDecl,
uint32_t* aLength) {
NS_ENSURE_TRUE(aElement && aLength, NS_ERROR_NULL_POINTER);
*aLength = 0;
nsCOMPtr<nsStyledElement> inlineStyles = do_QueryInterface(aElement);
NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsICSSDeclaration> cssDecl = inlineStyles->Style();
MOZ_ASSERT(cssDecl);
cssDecl.forget(aCssDecl);
*aLength = (*aCssDecl)->Length();
return NS_OK;
}
// static
Element* CSSEditUtils::GetElementContainerOrSelf(nsINode* aNode) {
MOZ_ASSERT(aNode);
if (nsINode::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();
}
} // namespace mozilla
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