Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 389 insertions, 0 deletions

diff --git a/editor/libeditor/CSSEditUtils.h b/editor/libeditor/CSSEditUtils.h
new file mode 100644
index 0000000000..8df077eb71
--- /dev/null
+++ b/editor/libeditor/CSSEditUtils.h
@@ -0,0 +1,389 @@
+/* -*- 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/. */
+
+#ifndef CSSEditUtils_h
+#define CSSEditUtils_h
+
+#include "ChangeStyleTransaction.h"  // for ChangeStyleTransaction
+#include "EditorForwards.h"
+#include "nsCOMPtr.h"  // for already_AddRefed
+#include "nsStringFwd.h"
+#include "nsTArray.h"  // for nsTArray
+#include "nscore.h"    // for nsAString, nsresult, nullptr
+
+class nsComputedDOMStyle;
+class nsAtom;
+class nsIContent;
+class nsICSSDeclaration;
+class nsINode;
+class nsStaticAtom;
+class nsStyledElement;
+
+namespace mozilla {
+namespace dom {
+class Element;
+}  // namespace dom
+
+using nsProcessValueFunc = void (*)(const nsAString* aInputString,
+                                    nsAString& aOutputString,
+                                    const char* aDefaultValueString,
+                                    const char* aPrependString,
+                                    const char* aAppendString);
+
+class CSSEditUtils final {
+ public:
+  // To prevent the class being instantiated
+  CSSEditUtils() = delete;
+
+  enum nsCSSEditableProperty {
+    eCSSEditableProperty_NONE = 0,
+    eCSSEditableProperty_background_color,
+    eCSSEditableProperty_background_image,
+    eCSSEditableProperty_border,
+    eCSSEditableProperty_caption_side,
+    eCSSEditableProperty_color,
+    eCSSEditableProperty_float,
+    eCSSEditableProperty_font_family,
+    eCSSEditableProperty_font_size,
+    eCSSEditableProperty_font_style,
+    eCSSEditableProperty_font_weight,
+    eCSSEditableProperty_height,
+    eCSSEditableProperty_list_style_type,
+    eCSSEditableProperty_margin_left,
+    eCSSEditableProperty_margin_right,
+    eCSSEditableProperty_text_align,
+    eCSSEditableProperty_text_decoration,
+    eCSSEditableProperty_vertical_align,
+    eCSSEditableProperty_whitespace,
+    eCSSEditableProperty_width
+  };
+
+  // Nb: keep these fields in an order that minimizes padding.
+  struct CSSEquivTable {
+    nsCSSEditableProperty cssProperty;
+    bool gettable;
+    bool caseSensitiveValue;
+    nsProcessValueFunc processValueFunctor;
+    const char* defaultValue;
+    const char* prependValue;
+    const char* appendValue;
+  };
+
+  /**
+   * Adds/remove a CSS declaration to the STYLE attribute carried by a given
+   * element.
+   *
+   * @param aHTMLEditor    [IN] An HTMLEditor instance
+   * @param aStyledElement [IN] A DOM styled element.
+   * @param aProperty      [IN] An atom containing the CSS property to set.
+   * @param aValue         [IN] A string containing the value of the CSS
+   *                            property.
+   */
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult
+  SetCSSPropertyWithTransaction(HTMLEditor& aHTMLEditor,
+                                nsStyledElement& aStyledElement,
+                                nsAtom& aProperty, const nsAString& aValue) {
+    return SetCSSPropertyInternal(aHTMLEditor, aStyledElement, aProperty,
+                                  aValue, false);
+  }
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult
+  SetCSSPropertyPixelsWithTransaction(HTMLEditor& aHTMLEditor,
+                                      nsStyledElement& aStyledElement,
+                                      nsAtom& aProperty, int32_t aIntValue);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult
+  SetCSSPropertyPixelsWithoutTransaction(nsStyledElement& aStyledElement,
+                                         const nsAtom& aProperty,
+                                         int32_t aIntValue);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult
+  RemoveCSSPropertyWithTransaction(HTMLEditor& aHTMLEditor,
+                                   nsStyledElement& aStyledElement,
+                                   nsAtom& aProperty,
+                                   const nsAString& aPropertyValue) {
+    return RemoveCSSPropertyInternal(aHTMLEditor, aStyledElement, aProperty,
+                                     aPropertyValue, false);
+  }
+
+  /**
+   * Gets the specified/computed style value of a CSS property for a given
+   * node (or its element ancestor if it is not an element).
+   *
+   * @param aContent       [IN] A DOM node.
+   * @param aProperty      [IN] An atom containing the CSS property to get.
+   * @param aPropertyValue [OUT] The retrieved value of the property.
+   */
+  static nsresult GetSpecifiedProperty(nsIContent& aContent,
+                                       nsAtom& aCSSProperty, nsAString& aValue);
+  MOZ_CAN_RUN_SCRIPT static nsresult GetComputedProperty(nsIContent& aContent,
+                                                         nsAtom& aCSSProperty,
+                                                         nsAString& aValue);
+
+  /**
+   * Removes a CSS property from the specified declarations in STYLE attribute
+   * and removes the node if it is an useless span.
+   *
+   * @param aHTMLEditor    [IN] An HTMLEditor instance
+   * @param aStyledElement  [IN] The styled element we want to remove a style
+   *                             from.
+   * @param aProperty       [IN] The CSS property atom to remove.
+   * @param aPropertyValue  [IN] The value of the property we have to remove
+   *                             if the property accepts more than one value.
+   * @return                A candidate point to put caret.
+   */
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static Result<EditorDOMPoint, nsresult>
+  RemoveCSSInlineStyleWithTransaction(HTMLEditor& aHTMLEditor,
+                                      nsStyledElement& aStyledElement,
+                                      nsAtom* aProperty,
+                                      const nsAString& aPropertyValue);
+
+  /**
+   * Get the default browser background color if we need it for
+   * GetCSSBackgroundColorState().
+   *
+   * @param aColor         [OUT] The default color as it is defined in prefs.
+   */
+  static void GetDefaultBackgroundColor(nsAString& aColor);
+
+  /**
+   * Returns the list of values for the CSS equivalences to
+   * the passed HTML style for the passed node.
+   *
+   * @param aElement       [IN] A DOM node.
+   * @param aStyle         [IN] The style to get the values.
+   * @param aValueString   [OUT] The list of CSS values.
+   */
+  MOZ_CAN_RUN_SCRIPT static nsresult GetComputedCSSEquivalentTo(
+      dom::Element& aElement, const EditorElementStyle& aStyle,
+      nsAString& aOutValue);
+
+  /**
+   * Does the node aNode (or his parent if it is not an element node) carries
+   * the CSS equivalent styles to the HTML style for this node ?
+   *
+   * @param aHTMLEditor    [IN] An HTMLEditor instance
+   * @param aContent       [IN] A DOM node.
+   * @param aStyle         [IN] The style to check.
+   * @param aInOutValue    [IN/OUT] Input value is used for initial value of the
+   *                                result, out value is the list of CSS values.
+   * @return               A boolean being true if the css properties are
+   *                       not same as initial value.
+   */
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static Result<bool, nsresult>
+  IsComputedCSSEquivalentTo(const HTMLEditor& aHTMLEditor, nsIContent& aContent,
+                            const EditorInlineStyle& aStyle,
+                            nsAString& aInOutValue);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT_BOUNDARY static Result<bool, nsresult>
+  IsSpecifiedCSSEquivalentTo(const HTMLEditor& aHTMLEditor,
+                             nsIContent& aContent,
+                             const EditorInlineStyle& aStyle,
+                             nsAString& aInOutValue);
+
+  /**
+   * This is a kind of Is*CSSEquivalentTo.
+   * Is*CSSEquivalentTo returns whether the properties aren't same as initial
+   * value.  But this method returns whether the properties aren't set.
+   * If node is <span style="font-weight: normal"/>,
+   *  - Is(Computed|Specified)CSSEquivalentTo returns false.
+   *  - Have(Computed|Specified)CSSEquivalentStyles returns true.
+   *
+   * @param aHTMLEditor    [IN] An HTMLEditor instance
+   * @param aContent       [IN] A DOM node.
+   * @param aStyle         [IN] The style to check.
+   * @return               A boolean being true if the css properties are
+   *                       not set.
+   */
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static Result<bool, nsresult>
+  HaveComputedCSSEquivalentStyles(const HTMLEditor& aHTMLEditor,
+                                  nsIContent& aContent,
+                                  const EditorInlineStyle& aStyle);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT_BOUNDARY static Result<bool, nsresult>
+  HaveSpecifiedCSSEquivalentStyles(const HTMLEditor& aHTMLEditor,
+                                   nsIContent& aContent,
+                                   const EditorInlineStyle& aStyle);
+
+  /**
+   * Adds to the node the CSS inline styles equivalent to the HTML style
+   * and return the number of CSS properties set by the call.
+   *
+   * @param aHTMLEditor    [IN} An HTMLEditor instance
+   * @param aNode          [IN] A DOM node.
+   * @param aStyleToSet    [IN] The style to set.  Can be EditorInlineStyle.
+   * @param aValue         [IN] The attribute or style value of aStyleToSet.
+   *
+   * @return               The number of CSS properties set by the call.
+   */
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static Result<size_t, nsresult>
+  SetCSSEquivalentToStyle(WithTransaction aWithTransaction,
+                          HTMLEditor& aHTMLEditor,
+                          nsStyledElement& aStyledElement,
+                          const EditorElementStyle& aStyleToSet,
+                          const nsAString* aValue);
+
+  /**
+   * Removes from the node the CSS inline styles equivalent to the HTML style.
+   *
+   * @param aHTMLEditor    [IN} An HTMLEditor instance
+   * @param aStyledElement [IN] A DOM Element (must not be null).
+   * @param aStyleToRemove [IN] The style to remove.  Can be EditorInlineStyle.
+   * @param aAttribute     [IN] An atom to an attribute name or nullptr if
+   *                            irrelevant.
+   * @param aValue         [IN] The attribute value.
+   */
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult RemoveCSSEquivalentToStyle(
+      WithTransaction aWithTransaction, HTMLEditor& aHTMLEditor,
+      nsStyledElement& aStyledElement, const EditorElementStyle& aStyleToRemove,
+      const nsAString* aValue);
+
+  /**
+   * Parses a "xxxx.xxxxxuuu" string where x is a digit and u an alpha char.
+   *
+   * @param aString        [IN] Input string to parse.
+   * @param aValue         [OUT] Numeric part.
+   * @param aUnit          [OUT] Unit part.
+   */
+  static void ParseLength(const nsAString& aString, float* aValue,
+                          nsAtom** aUnit);
+
+  /**
+   * DoStyledElementsHaveSameStyle compares two elements and checks if they have
+   * the same specified CSS declarations in the STYLE attribute. The answer is
+   * always false if at least one of them carries an ID or a class.
+   *
+   * @param aStyledElement      [IN] A styled element.
+   * @param aOtherStyledElement [IN] The other styled element.
+   * @return                    true if the two elements are considered to
+   *                            have same styles.
+   */
+  static bool DoStyledElementsHaveSameStyle(
+      nsStyledElement& aStyledElement, nsStyledElement& aOtherStyledElement);
+
+  /**
+   * Gets the computed style for a given element.  Can return null.
+   */
+  static already_AddRefed<nsComputedDOMStyle> GetComputedStyle(
+      dom::Element* aElement);
+
+ private:
+  enum class StyleType { Specified, Computed };
+
+  /**
+   * Retrieves the CSS property atom from an enum.
+   *
+   * @param aProperty           The enum value for the property.
+   * @return                    The corresponding atom.
+   */
+  static nsStaticAtom* GetCSSPropertyAtom(nsCSSEditableProperty aProperty);
+
+  struct CSSDeclaration {
+    nsStaticAtom& mProperty;
+    nsString const mValue;
+  };
+
+  /**
+   * Retrieves the CSS declarations for aEquivTable.
+   *
+   * @param aEquivTable         The equivalence table.
+   * @param aValue              Optional.  If specified, may return only
+   *                            matching declarations to this value (depends on
+   *                            the style, check how is aInputString of
+   *                            nsProcessValueFunc for the details).
+   * @param aHandlingFor        What's the purpose of calling this.
+   * @param aOutCSSDeclarations [OUT] The array of CSS declarations.
+   */
+  enum class HandlingFor { GettingStyle, SettingStyle, RemovingStyle };
+  static void GetCSSDeclarations(const CSSEquivTable* aEquivTable,
+                                 const nsAString* aValue,
+                                 HandlingFor aHandlingFor,
+                                 nsTArray<CSSDeclaration>& aOutCSSDeclarations);
+
+  /**
+   * Retrieves the CSS declarations equivalent to the given aStyle/aValue on
+   * aElement.
+   *
+   * @param aElement            The DOM node.
+   * @param aStyle              The style to get equivelent CSS properties and
+   *                            values.
+   * @param aValue              Optional.  If specified, may return only
+   *                            matching declarations to this value (depends on
+   *                            the style, check how is aInputString of
+   *                            nsProcessValueFunc for the details).
+   * @param aHandlingFor        What's the purpose of calling this.
+   * @param aOutCSSDeclarations [OUT] The array of CSS declarations.
+   */
+  static void GetCSSDeclarations(dom::Element& aElement,
+                                 const EditorElementStyle& aStyle,
+                                 const nsAString* aValue,
+                                 HandlingFor aHandlingFor,
+                                 nsTArray<CSSDeclaration>& aOutCSSDeclarations);
+
+  /**
+   * Back-end for GetSpecifiedProperty and GetComputedProperty.
+   *
+   * @param aNode               [IN] A DOM node.
+   * @param aProperty           [IN] A CSS property.
+   * @param aValue              [OUT] The retrieved value for this property.
+   */
+  MOZ_CAN_RUN_SCRIPT static nsresult GetComputedCSSInlinePropertyBase(
+      nsIContent& aContent, nsAtom& aCSSProperty, nsAString& aValue);
+  static nsresult GetSpecifiedCSSInlinePropertyBase(nsIContent& aContent,
+                                                    nsAtom& aCSSProperty,
+                                                    nsAString& aValue);
+
+  /**
+   * Those methods are wrapped with corresponding methods which do not have
+   * "Internal" in their names.  Don't use these methods directly even if
+   * you want to use one of them in this class.
+   * Note that these methods may run scrip only when StyleType is Computed.
+   */
+  MOZ_CAN_RUN_SCRIPT static nsresult GetCSSEquivalentTo(
+      dom::Element& aElement, const EditorElementStyle& aStyle,
+      nsAString& aOutValue, StyleType aStyleType);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static Result<bool, nsresult>
+  IsCSSEquivalentTo(const HTMLEditor& aHTMLEditor, nsIContent& aContent,
+                    const EditorInlineStyle& aStyle, nsAString& aInOutValue,
+                    StyleType aStyleType);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static Result<bool, nsresult>
+  HaveCSSEquivalentStyles(const HTMLEditor& aHTMLEditor, nsIContent& aContent,
+                          const EditorInlineStyle& aStyle,
+                          StyleType aStyleType);
+
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult RemoveCSSPropertyInternal(
+      HTMLEditor& aHTMLEditor, nsStyledElement& aStyledElement,
+      nsAtom& aProperty, const nsAString& aPropertyValue,
+      bool aSuppressTxn = false);
+  [[nodiscard]] MOZ_CAN_RUN_SCRIPT static nsresult SetCSSPropertyInternal(
+      HTMLEditor& aHTMLEditor, nsStyledElement& aStyledElement,
+      nsAtom& aProperty, const nsAString& aValue, bool aSuppressTxn = false);
+
+  /**
+   * Answers true if the given aStyle on aElement or an element whose name is
+   * aTagName has a CSS equivalence in this implementation.
+   *
+   * @param aTagName       [IN] Tag name of an element.
+   * @param aElement       [IN] An element.
+   * @param aStyle         [IN] The style you want to check.
+   * @return               A boolean saying if the tag/attribute has a CSS
+   *                       equiv.
+   */
+  [[nodiscard]] static bool IsCSSEditableStyle(
+      const nsAtom& aTagName, const EditorElementStyle& aStyle);
+  [[nodiscard]] static bool IsCSSEditableStyle(
+      const dom::Element& aElement, const EditorElementStyle& aStyle);
+
+  friend class EditorElementStyle;  // for IsCSSEditableStyle
+};
+
+#define NS_EDITOR_INDENT_INCREMENT_IN 0.4134f
+#define NS_EDITOR_INDENT_INCREMENT_CM 1.05f
+#define NS_EDITOR_INDENT_INCREMENT_MM 10.5f
+#define NS_EDITOR_INDENT_INCREMENT_PT 29.76f
+#define NS_EDITOR_INDENT_INCREMENT_PC 2.48f
+#define NS_EDITOR_INDENT_INCREMENT_EM 3
+#define NS_EDITOR_INDENT_INCREMENT_EX 6
+#define NS_EDITOR_INDENT_INCREMENT_PX 40
+#define NS_EDITOR_INDENT_INCREMENT_PERCENT 4
+
+}  // namespace mozilla
+
+#endif  // #ifndef CSSEditUtils_h