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/*
* Copyright (c) 2018 Ronald Brill.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.gargoylesoftware.css.parser;
import com.gargoylesoftware.css.parser.media.MediaQueryList;
import com.gargoylesoftware.css.parser.selector.SelectorList;
/**
* This is the main interface that most CSS applications implement: if the
* application needs to be informed of basic parsing events, it implements this
* interface and registers an instance with the CSS parser using the
* setCSSHandler method.
*
* @author Ronald Brill
*/
public interface DocumentHandler {
/**
* Receive notification of the beginning of a style sheet.
*
* The CSS parser will invoke this method only once, before any other
* methods in this interface.
*
* @param source the input source to parse
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void startDocument(InputSource source) throws CSSException;
/**
* Receive notification of the end of a document.
*
* The CSS parser will invoke this method only once, and it will be the
* last method invoked during the parse. The parser shall not invoke this
* method until it has either abandoned parsing (because of an
* unrecoverable error) or reached the end of input.
*
* @param source the input source to parse
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void endDocument(InputSource source) throws CSSException;
/**
* Receive notification of the end of a media statement.
*
* @param media The intended destination media for style information.
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void endMedia(MediaQueryList media) throws CSSException;
/**
* Receive notification of the end of a media statement.
*
* @param name the name
* @param pseudoPage the pseudo page (if any, null otherwise)
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void endPage(String name, String pseudoPage) throws CSSException;
/**
* Receive notification of the end of a font face statement.
*
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void endFontFace() throws CSSException;
/**
* Receive notification of the end of a rule statement.
*
* @param selectors All intended selectors for all declarations.
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void endSelector(SelectorList selectors) throws CSSException;
/**
* Receive notification of a charset at-rule.
*
* @param characterEncoding the character encoding
* @param locator the locator
* @throws CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void charset(String characterEncoding, Locator locator) throws CSSException;
/**
* Receive notification of a import statement in the style sheet.
*
* @param uri The URI of the imported style sheet.
* @param media The intended destination media for style information.
* @param defaultNamespaceURI The default namespace URI for the imported
* style sheet.
* @param locator the locator
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void importStyle(String uri, MediaQueryList media,
String defaultNamespaceURI, Locator locator) throws CSSException;
/**
* Receive notification of an unknown rule t-rule not supported by this
* parser.
*
* @param atRule The complete ignored at-rule.
* @param locator the locator
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void ignorableAtRule(String atRule, Locator locator) throws CSSException;
/**
* Receive notification of the beginning of a font face statement.
*
* The Parser will invoke this method at the beginning of every font face
* statement in the style sheet. there will be a corresponding endFontFace()
* event for every startFontFace() event.
*
* @param locator the locator
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void startFontFace(Locator locator) throws CSSException;
/**
* Receive notification of the beginning of a page statement.
*
* The Parser will invoke this method at the beginning of every page
* statement in the style sheet. there will be a corresponding endPage()
* event for every startPage() event.
*
* @param name the name of the page (if any, null otherwise)
* @param pseudoPage the pseudo page (if any, null otherwise)
* @param locator the locator
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void startPage(String name, String pseudoPage, Locator locator) throws CSSException;
/**
* Receive notification of the beginning of a media statement.
*
* The Parser will invoke this method at the beginning of every media
* statement in the style sheet. there will be a corresponding endMedia()
* event for every startElement() event.
*
* @param media The intended destination media for style information.
* @param locator the locator
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void startMedia(MediaQueryList media, Locator locator) throws CSSException;
/**
* Receive notification of the beginning of a rule statement.
*
* @param selectors All intended selectors for all declarations.
* @param locator the locator
* @exception CSSException Any CSS exception, possibly wrapping another
* exception.
*/
void startSelector(SelectorList selectors, Locator locator) throws CSSException;
/**
* Receive notification of a declaration.
*
* @param name the name of the property.
* @param value the value of the property. All whitespace are stripped.
* @param important is this property important ?
* @param locator the locator
*/
void property(String name, LexicalUnit value, boolean important, Locator locator);
}
