зеркало из https://github.com/mozilla/pjs.git
415 строки
19 KiB
C++
415 строки
19 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Original Author: Daniel Glazman <glazman@netscape.com>
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* Ms2ger <ms2ger@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsHTMLCSSUtils_h__
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#define nsHTMLCSSUtils_h__
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsTArray.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMElement.h"
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#include "nsIHTMLEditor.h"
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#include "ChangeCSSInlineStyleTxn.h"
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#include "nsEditProperty.h"
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#include "nsIDOMCSSStyleDeclaration.h"
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#define SPECIFIED_STYLE_TYPE 1
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#define COMPUTED_STYLE_TYPE 2
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class nsHTMLEditor;
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class nsIDOMWindow;
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typedef void (*nsProcessValueFunc)(const nsAString * aInputString, nsAString & aOutputString,
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const char * aDefaultValueString,
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const char * aPrependString, const char* aAppendString);
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class nsHTMLCSSUtils
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{
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public:
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explicit nsHTMLCSSUtils(nsHTMLEditor* aEditor);
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~nsHTMLCSSUtils();
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enum nsCSSEditableProperty {
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eCSSEditableProperty_NONE=0,
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eCSSEditableProperty_background_color,
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eCSSEditableProperty_background_image,
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eCSSEditableProperty_border,
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eCSSEditableProperty_caption_side,
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eCSSEditableProperty_color,
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eCSSEditableProperty_float,
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eCSSEditableProperty_font_family,
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eCSSEditableProperty_font_size,
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eCSSEditableProperty_font_style,
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eCSSEditableProperty_font_weight,
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eCSSEditableProperty_height,
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eCSSEditableProperty_list_style_type,
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eCSSEditableProperty_margin_left,
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eCSSEditableProperty_margin_right,
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eCSSEditableProperty_text_align,
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eCSSEditableProperty_text_decoration,
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eCSSEditableProperty_vertical_align,
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eCSSEditableProperty_whitespace,
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eCSSEditableProperty_width
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};
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struct CSSEquivTable {
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nsCSSEditableProperty cssProperty;
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nsProcessValueFunc processValueFunctor;
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const char * defaultValue;
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const char * prependValue;
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const char * appendValue;
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PRBool gettable;
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PRBool caseSensitiveValue;
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};
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/** answers true if the given combination element_name/attribute_name
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* has a CSS equivalence in this implementation
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*
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* @return a boolean saying if the tag/attribute has a css equiv
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* @param aNode [IN] a DOM node
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* @param aProperty [IN] an atom containing a HTML tag name
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* @param aAttribute [IN] a string containing the name of a HTML attribute carried by the element above
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*/
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PRBool IsCSSEditableProperty(nsIDOMNode * aNode, nsIAtom * aProperty, const nsAString * aAttribute);
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/** adds/remove a CSS declaration to the STYLE atrribute carried by a given element
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*
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* @param aElement [IN] a DOM element
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* @param aProperty [IN] an atom containing the CSS property to set
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* @param aValue [IN] a string containing the value of the CSS property
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* @param aSuppressTransaction [IN] a boolean indicating, when true,
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* that no transaction should be recorded
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*/
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nsresult SetCSSProperty(nsIDOMElement * aElement, nsIAtom * aProperty,
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const nsAString & aValue,
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PRBool aSuppressTransaction);
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nsresult SetCSSPropertyPixels(nsIDOMElement *aElement, nsIAtom *aProperty,
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PRInt32 aIntValue, PRBool aSuppressTxn);
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nsresult RemoveCSSProperty(nsIDOMElement * aElement, nsIAtom * aProperty,
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const nsAString & aPropertyValue, PRBool aSuppressTransaction);
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/** directly adds/remove a CSS declaration to the STYLE atrribute carried by
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* a given element without going through the txn manager
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*
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* @param aElement [IN] a DOM element
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* @param aProperty [IN] a string containing the CSS property to set/remove
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* @param aValue [IN] a string containing the new value of the CSS property
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*/
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nsresult SetCSSProperty(nsIDOMElement * aElement,
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const nsAString & aProperty,
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const nsAString & aValue);
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nsresult SetCSSPropertyPixels(nsIDOMElement * aElement,
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const nsAString & aProperty,
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PRInt32 aIntValue);
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nsresult RemoveCSSProperty(nsIDOMElement * aElement,
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const nsAString & aProperty);
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/** gets the specified/computed style value of a CSS property for a given node (or its element
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* ancestor if it is not an element)
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*
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* @param aNode [IN] a DOM node
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* @param aProperty [IN] an atom containing the CSS property to get
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* @param aPropertyValue [OUT] the retrieved value of the property
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*/
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nsresult GetSpecifiedProperty(nsIDOMNode *aNode, nsIAtom *aProperty,
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nsAString & aValue);
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nsresult GetComputedProperty(nsIDOMNode *aNode, nsIAtom *aProperty,
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nsAString & aValue);
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/** Removes a CSS property from the specified declarations in STYLE attribute
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** and removes the node if it is an useless span
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*
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* @param aNode [IN] the specific node we want to remove a style from
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* @param aProperty [IN] the CSS property atom to remove
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* @param aPropertyValue [IN] the value of the property we have to rremove if the property
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* accepts more than one value
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*/
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nsresult RemoveCSSInlineStyle(nsIDOMNode * aNode, nsIAtom * aProperty, const nsAString & aPropertyValue);
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/** Answers true is the property can be removed by setting a "none" CSS value
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* on a node
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*
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* @return a boolean saying if the property can be remove by setting a "none" value
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* @param aProperty [IN] an atom containing a CSS property
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* @param aAttribute [IN] pointer to an attribute name or null if this information is irrelevant
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*/
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PRBool IsCSSInvertable(nsIAtom * aProperty, const nsAString * aAttribute);
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/** Get the default browser background color if we need it for GetCSSBackgroundColorState
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*
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* @param aColor [OUT] the default color as it is defined in prefs
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*/
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void GetDefaultBackgroundColor(nsAString & aColor);
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/** Get the default length unit used for CSS Indent/Outdent
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*
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* @param aLengthUnit [OUT] the default length unit as it is defined in prefs
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*/
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void GetDefaultLengthUnit(nsAString & aLengthUnit);
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/** asnwers true if the element aElement carries an ID or a class
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*
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* @param aElement [IN] a DOM element
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* @param aReturn [OUT] the boolean answer
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*/
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nsresult HasClassOrID(nsIDOMElement * aElement, PRBool & aReturn);
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/** returns the list of values for the CSS equivalences to
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* the passed HTML style for the passed node
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*
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* @param aNode [IN] a DOM node
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* @param aHTMLProperty [IN] an atom containing an HTML property
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* @param aAttribute [IN] a pointer to an attribute name or nsnull if irrelevant
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* @param aValueString [OUT] the list of css values
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* @param aStyleType [IN] SPECIFIED_STYLE_TYPE to query the specified style values
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COMPUTED_STYLE_TYPE to query the computed style values
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*/
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nsresult GetCSSEquivalentToHTMLInlineStyleSet(nsIDOMNode * aNode,
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nsIAtom * aHTMLProperty,
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const nsAString * aAttribute,
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nsAString & aValueString,
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PRUint8 aStyleType);
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/** Does the node aNode (or his parent if it is not an element node) carries
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* the CSS equivalent styles to the HTML style for this node ?
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*
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* @param aNode [IN] a DOM node
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* @param aHTMLProperty [IN] an atom containing an HTML property
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* @param aAttribute [IN] a pointer to an attribute name or nsnull if irrelevant
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* @param aIsSet [OUT] a boolean being true if the css properties are set
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* @param aValueString [IN/OUT] the attribute value (in) the list of css values (out)
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* @param aStyleType [IN] SPECIFIED_STYLE_TYPE to query the specified style values
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COMPUTED_STYLE_TYPE to query the computed style values
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*/
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nsresult IsCSSEquivalentToHTMLInlineStyleSet(nsIDOMNode * aNode,
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nsIAtom * aHTMLProperty,
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const nsAString * aAttribute,
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PRBool & aIsSet,
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nsAString & aValueString,
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PRUint8 aStyleType);
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/** Adds to the node the CSS inline styles equivalent to the HTML style
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* and return the number of CSS properties set by the call
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*
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* @param aNode [IN] a DOM node
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* @param aHTMLProperty [IN] an atom containing an HTML property
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* @param aAttribute [IN] a pointer to an attribute name or nsnull if irrelevant
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* @param aValue [IN] the attribute value
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* @param aCount [OUT] the number of CSS properties set by the call
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* @param aSuppressTransaction [IN] a boolean indicating, when true,
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* that no transaction should be recorded
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*/
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nsresult SetCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
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nsIAtom * aHTMLProperty,
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const nsAString * aAttribute,
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const nsAString * aValue,
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PRInt32 * aCount,
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PRBool aSuppressTransaction);
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/** removes from the node the CSS inline styles equivalent to the HTML style
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*
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* @param aNode [IN] a DOM node
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* @param aHTMLProperty [IN] an atom containing an HTML property
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* @param aAttribute [IN] a pointer to an attribute name or nsnull if irrelevant
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* @param aValue [IN] the attribute value
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* @param aSuppressTransaction [IN] a boolean indicating, when true,
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* that no transaction should be recorded
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*/
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nsresult RemoveCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
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nsIAtom *aHTMLProperty,
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const nsAString *aAttribute,
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const nsAString *aValue,
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PRBool aSuppressTransaction);
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/** parses a "xxxx.xxxxxuuu" string where x is a digit and u an alpha char
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* we need such a parser because nsIDOMCSSStyleDeclaration::GetPropertyCSSValue() is not
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* implemented
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*
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* @param aString [IN] input string to parse
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* @param aValue [OUT] numeric part
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* @param aUnit [OUT] unit part
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*/
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void ParseLength(const nsAString & aString, float * aValue, nsIAtom ** aUnit);
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/** sets the mIsCSSPrefChecked private member ; used as callback from observer when
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* the css pref state is changed
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*
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* @param aIsCSSPrefChecked [IN] the new boolean state for the pref
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*/
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nsresult SetCSSEnabled(PRBool aIsCSSPrefChecked);
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/** retrieves the mIsCSSPrefChecked private member, true if the css pref is checked,
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* false if it is not
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*
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* @return the boolean value of the css pref
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*/
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PRBool IsCSSPrefChecked();
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/** ElementsSameStyle compares two elements and checks if they have the same
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* specified CSS declarations in the STYLE attribute
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* The answer is always false if at least one of them carries an ID or a class
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*
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* @return true if the two elements are considered to have same styles
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* @param aFirstNode [IN] a DOM node
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* @param aSecondNode [IN] a DOM node
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*/
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PRBool ElementsSameStyle(nsIDOMNode *aFirstNode, nsIDOMNode *aSecondNode);
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/** get the specified inline styles (style attribute) for an element
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*
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* @param aElement [IN] the element node
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* @param aCssDecl [OUT] the CSS declaration corresponding to the style attr
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* @param aLength [OUT] the number of declarations in aCssDecl
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*/
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nsresult GetInlineStyles(nsIDOMElement * aElement, nsIDOMCSSStyleDeclaration ** aCssDecl,
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PRUint32 * aLength);
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/** returns aNode itself if it is an element node, or the first ancestors being an element
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* node if aNode is not one itself
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*
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* @param aNode [IN] a node
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* @param aElement [OUT] the deepest element node containing aNode (possibly aNode itself)
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*/
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nsresult GetElementContainerOrSelf(nsIDOMNode * aNode, nsIDOMElement ** aElement);
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/**
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* Gets the default Window for a given node.
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*
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* @param aNode the node we want the default Window for
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* @param aWindow [OUT] the default Window
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*/
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nsresult GetDefaultViewCSS(nsIDOMNode* aNode, nsIDOMWindow** aWindow);
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private:
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/** retrieves the css property atom from an enum
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*
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* @param aProperty [IN] the enum value for the property
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* @param aAtom [OUT] the corresponding atom
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*/
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void GetCSSPropertyAtom(nsCSSEditableProperty aProperty, nsIAtom ** aAtom);
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/** retrieves the CSS declarations equivalent to a HTML style value for
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* a given equivalence table
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*
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* @param aPropertyArray [OUT] the array of css properties
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* @param aValueArray [OUT] the array of values for the css properties above
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* @param aEquivTable [IN] the equivalence table
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* @param aValue [IN] the HTML style value
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* @param aGetOrRemoveRequest [IN] a boolean value being true if the call to the current method
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* is made for GetCSSEquivalentToHTMLInlineStyleSet or
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* RemoveCSSEquivalentToHTMLInlineStyleSet
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*/
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void BuildCSSDeclarations(nsTArray<nsIAtom*> & aPropertyArray,
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nsTArray<nsString> & cssValueArray,
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const CSSEquivTable * aEquivTable,
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const nsAString * aValue,
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PRBool aGetOrRemoveRequest);
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/** retrieves the CSS declarations equivalent to the given HTML property/attribute/value
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* for a given node
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*
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* @param aNode [IN] the DOM node
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* @param aHTMLProperty [IN] an atom containing an HTML property
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* @param aAttribute [IN] a pointer to an attribute name or nsnull if irrelevant
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* @param aValue [IN] the attribute value
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* @param aPropertyArray [OUT] the array of css properties
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* @param aValueArray [OUT] the array of values for the css properties above
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* @param aGetOrRemoveRequest [IN] a boolean value being true if the call to the current method
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* is made for GetCSSEquivalentToHTMLInlineStyleSet or
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* RemoveCSSEquivalentToHTMLInlineStyleSet
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*/
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void GenerateCSSDeclarationsFromHTMLStyle(nsIDOMNode * aNode,
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nsIAtom * aHTMLProperty,
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const nsAString *aAttribute,
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const nsAString *aValue,
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nsTArray<nsIAtom*> & aPropertyArray,
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nsTArray<nsString> & aValueArray,
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PRBool aGetOrRemoveRequest);
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/** creates a Transaction for setting or removing a css property
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*
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* @param aElement [IN] a DOM element
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* @param aProperty [IN] a CSS property
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* @param aValue [IN] the value to remove for this CSS property or the empty string if irrelevant
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* @param aTxn [OUT] the created transaction
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* @param aRemoveProperty [IN] true if we create a "remove" transaction, false for a "set"
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*/
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nsresult CreateCSSPropertyTxn(nsIDOMElement * aElement,
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nsIAtom * aProperty,
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const nsAString & aValue,
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ChangeCSSInlineStyleTxn ** aTxn,
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PRBool aRemoveProperty);
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/** back-end for GetSpecifiedProperty and GetComputedProperty
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*
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* @param aNode [IN] a DOM node
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* @param aProperty [IN] a CSS property
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* @param aValue [OUT] the retrieved value for this property
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* @param aWindow [IN] the window we need in case we query computed styles
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* @param aStyleType [IN] SPECIFIED_STYLE_TYPE to query the specified style values
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* COMPUTED_STYLE_TYPE to query the computed style values
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*/
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nsresult GetCSSInlinePropertyBase(nsIDOMNode * aNode, nsIAtom * aProperty,
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nsAString & aValue,
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nsIDOMWindow* aWindow,
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PRUint8 aStyleType);
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private:
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nsHTMLEditor *mHTMLEditor;
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PRBool mIsCSSPrefChecked;
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};
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#define NS_EDITOR_INDENT_INCREMENT_IN 0.4134f
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#define NS_EDITOR_INDENT_INCREMENT_CM 1.05f
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#define NS_EDITOR_INDENT_INCREMENT_MM 10.5f
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#define NS_EDITOR_INDENT_INCREMENT_PT 29.76f
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#define NS_EDITOR_INDENT_INCREMENT_PC 2.48f
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#define NS_EDITOR_INDENT_INCREMENT_EM 3
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#define NS_EDITOR_INDENT_INCREMENT_EX 6
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#define NS_EDITOR_INDENT_INCREMENT_PX 40
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#define NS_EDITOR_INDENT_INCREMENT_PERCENT 4
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#endif /* nsHTMLCSSUtils_h__ */
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