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-rw-r--r--editor/libeditor/CSSEditUtils.cpp1422
1 files changed, 1422 insertions, 0 deletions
diff --git a/editor/libeditor/CSSEditUtils.cpp b/editor/libeditor/CSSEditUtils.cpp
new file mode 100644
index 000000000..5199838c0
--- /dev/null
+++ b/editor/libeditor/CSSEditUtils.cpp
@@ -0,0 +1,1422 @@
+/* -*- 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/DeclarationBlockInlines.h"
+#include "mozilla/css/StyleRule.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/mozalloc.h"
+#include "nsAString.h"
+#include "nsCOMPtr.h"
+#include "nsColor.h"
+#include "nsComputedDOMStyle.h"
+#include "nsDebug.h"
+#include "nsDependentSubstring.h"
+#include "nsError.h"
+#include "nsGkAtoms.h"
+#include "nsIAtom.h"
+#include "nsIContent.h"
+#include "nsIDOMCSSStyleDeclaration.h"
+#include "nsIDOMElement.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 "nsStyledElement.h"
+#include "nsSubstringTuple.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(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 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
+bool
+CSSEditUtils::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
+ // 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 && (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
+CSSEditUtils::SetCSSProperty(Element& aElement,
+ nsIAtom& aProperty,
+ const nsAString& aValue,
+ bool aSuppressTxn)
+{
+ RefPtr<ChangeStyleTransaction> transaction =
+ CreateCSSPropertyTxn(aElement, aProperty, aValue,
+ ChangeStyleTransaction::eSet);
+ if (aSuppressTxn) {
+ return transaction->DoTransaction();
+ }
+ return mHTMLEditor->DoTransaction(transaction);
+}
+
+nsresult
+CSSEditUtils::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
+CSSEditUtils::RemoveCSSProperty(Element& aElement,
+ nsIAtom& aProperty,
+ const nsAString& aValue,
+ bool aSuppressTxn)
+{
+ RefPtr<ChangeStyleTransaction> transaction =
+ CreateCSSPropertyTxn(aElement, aProperty, aValue,
+ ChangeStyleTransaction::eRemove);
+ if (aSuppressTxn) {
+ return transaction->DoTransaction();
+ }
+ return mHTMLEditor->DoTransaction(transaction);
+}
+
+already_AddRefed<ChangeStyleTransaction>
+CSSEditUtils::CreateCSSPropertyTxn(
+ Element& aElement,
+ nsIAtom& aAttribute,
+ const nsAString& aValue,
+ ChangeStyleTransaction::EChangeType aChangeType)
+{
+ RefPtr<ChangeStyleTransaction> transaction =
+ new ChangeStyleTransaction(aElement, aAttribute, aValue, aChangeType);
+ return transaction.forget();
+}
+
+nsresult
+CSSEditUtils::GetSpecifiedProperty(nsINode& aNode,
+ nsIAtom& aProperty,
+ nsAString& aValue)
+{
+ return GetCSSInlinePropertyBase(&aNode, &aProperty, aValue, eSpecified);
+}
+
+nsresult
+CSSEditUtils::GetComputedProperty(nsINode& aNode,
+ nsIAtom& aProperty,
+ nsAString& aValue)
+{
+ return GetCSSInlinePropertyBase(&aNode, &aProperty, aValue, eComputed);
+}
+
+nsresult
+CSSEditUtils::GetCSSInlinePropertyBase(nsINode* aNode,
+ nsIAtom* 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;
+ }
+ if (decl->IsServo()) {
+ MOZ_CRASH("stylo: not implemented");
+ return NS_ERROR_NOT_IMPLEMENTED;
+ }
+ nsCSSPropertyID prop =
+ nsCSSProps::LookupProperty(nsDependentAtomString(aProperty),
+ CSSEnabledState::eForAllContent);
+ MOZ_ASSERT(prop != eCSSProperty_UNKNOWN);
+ decl->AsGecko()->GetPropertyValueByID(prop, aValue);
+
+ return NS_OK;
+}
+
+already_AddRefed<nsComputedDOMStyle>
+CSSEditUtils::GetComputedStyle(Element* aElement)
+{
+ MOZ_ASSERT(aElement);
+
+ nsIDocument* doc = aElement->GetUncomposedDoc();
+ 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
+CSSEditUtils::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 rv = RemoveCSSProperty(*element, *aProperty, aPropertyValue);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (!element->IsHTMLElement(nsGkAtoms::span) ||
+ HTMLEditor::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
+CSSEditUtils::IsCSSInvertible(nsIAtom& aProperty,
+ const nsAString* aAttribute)
+{
+ return nsGkAtoms::b == &aProperty;
+}
+
+// Get the default browser background color if we need it for GetCSSBackgroundColorState
+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
+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");
+ }
+}
+
+// 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
+CSSEditUtils::ParseLength(const nsAString& aString,
+ float* aValue,
+ nsIAtom** 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();
+}
+
+void
+CSSEditUtils::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
+CSSEditUtils::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
+CSSEditUtils::GenerateCSSDeclarationsFromHTMLStyle(
+ Element* aElement,
+ nsIAtom* aHTMLProperty,
+ const nsAString* aAttribute,
+ const nsAString* aValue,
+ nsTArray<nsIAtom*>& 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->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 Element version returns aCount instead.
+int32_t
+CSSEditUtils::SetCSSEquivalentToHTMLStyle(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 rv = SetCSSEquivalentToHTMLStyle(aElement->AsDOMNode(),
+ aProperty, aAttribute,
+ aValue, &count,
+ aSuppressTransaction);
+ NS_ASSERTION(NS_SUCCEEDED(rv), "SetCSSEquivalentToHTMLStyle failed");
+ NS_ENSURE_SUCCESS(rv, count);
+ return count;
+}
+
+nsresult
+CSSEditUtils::SetCSSEquivalentToHTMLStyle(nsIDOMNode* aNode,
+ nsIAtom* aHTMLProperty,
+ const nsAString* aAttribute,
+ const nsAString* aValue,
+ int32_t* aCount,
+ bool aSuppressTransaction)
+{
+ nsCOMPtr<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 rv = SetCSSProperty(*element, *cssPropertyArray[index],
+ cssValueArray[index], aSuppressTransaction);
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+ return NS_OK;
+}
+
+// Remove from aNode the CSS inline style equivalent to HTMLProperty/aAttribute/aValue for the node
+nsresult
+CSSEditUtils::RemoveCSSEquivalentToHTMLStyle(nsIDOMNode* aNode,
+ nsIAtom* aHTMLProperty,
+ const nsAString* aAttribute,
+ const nsAString* aValue,
+ bool aSuppressTransaction)
+{
+ nsCOMPtr<Element> element = do_QueryInterface(aNode);
+ NS_ENSURE_TRUE(element, NS_OK);
+
+ return RemoveCSSEquivalentToHTMLStyle(element, aHTMLProperty, aAttribute,
+ aValue, aSuppressTransaction);
+}
+
+nsresult
+CSSEditUtils::RemoveCSSEquivalentToHTMLStyle(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 rv = RemoveCSSProperty(*aElement,
+ *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.
+nsresult
+CSSEditUtils::GetCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
+ nsIAtom* aHTMLProperty,
+ const nsAString* 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<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 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.
+bool
+CSSEditUtils::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
+CSSEditUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
+ nsIAtom* aProperty,
+ const nsAString* aAttribute,
+ nsAString& aValue,
+ StyleType aStyleType)
+{
+ MOZ_ASSERT(aNode && aProperty);
+ bool isSet;
+ nsresult rv = IsCSSEquivalentToHTMLInlineStyleSet(aNode->AsDOMNode(),
+ aProperty, aAttribute,
+ isSet, aValue, aStyleType);
+ NS_ENSURE_SUCCESS(rv, false);
+ return isSet;
+}
+
+nsresult
+CSSEditUtils::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 rv =
+ GetCSSEquivalentToHTMLInlineStyleSet(node, aHTMLProperty, aHTMLAttribute,
+ valueString, aStyleType);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // 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 = ChangeStyleTransaction::ValueIncludes(valueString, val);
+ } else if (nsGkAtoms::strike == aHTMLProperty) {
+ nsAutoString val;
+ val.AssignLiteral("line-through");
+ aIsSet = ChangeStyleTransaction::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_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(')'));
+ }
+
+ 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
+CSSEditUtils::SetCSSEnabled(bool aIsCSSPrefChecked)
+{
+ mIsCSSPrefChecked = aIsCSSPrefChecked;
+}
+
+bool
+CSSEditUtils::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
+CSSEditUtils::ElementsSameStyle(nsIDOMNode* aFirstNode,
+ nsIDOMNode* aSecondNode)
+{
+ nsCOMPtr<Element> firstElement = do_QueryInterface(aFirstNode);
+ nsCOMPtr<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
+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<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
+CSSEditUtils::GetInlineStyles(Element* aElement,
+ nsIDOMCSSStyleDeclaration** aCssDecl,
+ uint32_t* aLength)
+{
+ return GetInlineStyles(static_cast<nsISupports*>(aElement), aCssDecl, aLength);
+}
+
+nsresult
+CSSEditUtils::GetInlineStyles(nsIDOMElement* aElement,
+ nsIDOMCSSStyleDeclaration** aCssDecl,
+ uint32_t* aLength)
+{
+ return GetInlineStyles(static_cast<nsISupports*>(aElement), aCssDecl, aLength);
+}
+
+nsresult
+CSSEditUtils::GetInlineStyles(nsISupports* aElement,
+ nsIDOMCSSStyleDeclaration** 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<nsIDOMCSSStyleDeclaration> cssDecl =
+ do_QueryInterface(inlineStyles->Style());
+ MOZ_ASSERT(cssDecl);
+
+ cssDecl.forget(aCssDecl);
+ (*aCssDecl)->GetLength(aLength);
+ return NS_OK;
+}
+
+already_AddRefed<nsIDOMElement>
+CSSEditUtils::GetElementContainerOrSelf(nsIDOMNode* aNode)
+{
+ nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
+ NS_ENSURE_TRUE(node, nullptr);
+ nsCOMPtr<nsIDOMElement> element =
+ do_QueryInterface(GetElementContainerOrSelf(node));
+ return element.forget();
+}
+
+Element*
+CSSEditUtils::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
+CSSEditUtils::SetCSSProperty(nsIDOMElement* aElement,
+ const nsAString& aProperty,
+ const nsAString& aValue)
+{
+ nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
+ uint32_t length;
+ nsresult rv = GetInlineStyles(aElement, getter_AddRefs(cssDecl), &length);
+ if (NS_FAILED(rv) || !cssDecl) {
+ return rv;
+ }
+
+ return cssDecl->SetProperty(aProperty,
+ aValue,
+ EmptyString());
+}
+
+nsresult
+CSSEditUtils::SetCSSPropertyPixels(nsIDOMElement* aElement,
+ const nsAString& aProperty,
+ int32_t aIntValue)
+{
+ nsAutoString s;
+ s.AppendInt(aIntValue);
+ return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"));
+}
+
+} // namespace mozilla
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 14:51:52 +0000