| author | ohair |
| Tue, 28 Dec 2010 15:53:50 -0800 | |
| changeset 7668 | d4a77089c587 |
| parent 7014 | eb4fcf73ee99 |
| child 25148 | 1026dc322690 |
| child 25193 | 187a455af8f8 |
| permissions | -rw-r--r-- |
| 2 | 1 |
/* |
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* Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.text.html; |
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import java.io.Writer; |
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import java.io.IOException; |
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import java.util.*; |
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import java.awt.Color; |
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import javax.swing.text.*; |
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/** |
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* MinimalHTMLWriter is a fallback writer used by the |
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* HTMLEditorKit to write out HTML for a document that |
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* is a not produced by the EditorKit. |
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* |
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* The format for the document is: |
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* <pre> |
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* <html> |
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* <head> |
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* <style> |
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* <!-- list of named styles |
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* p.normal {
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* font-family: SansSerif; |
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* margin-height: 0; |
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* font-size: 14 |
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* } |
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* --> |
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* </style> |
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* </head> |
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* <body> |
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* <p style=normal> |
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* <b>Bold, italic, and underline attributes |
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* of the run are emitted as HTML tags. |
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* The remaining attributes are emitted as |
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* part of the style attribute of a <span> tag. |
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* The syntax is similar to inline styles.</b> |
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* </p> |
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* </body> |
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* </html> |
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* </pre> |
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* |
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* @author Sunita Mani |
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*/ |
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public class MinimalHTMLWriter extends AbstractWriter {
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/** |
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* These static finals are used to |
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* tweak and query the fontMask about which |
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* of these tags need to be generated or |
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* terminated. |
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*/ |
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private static final int BOLD = 0x01; |
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private static final int ITALIC = 0x02; |
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private static final int UNDERLINE = 0x04; |
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// Used to map StyleConstants to CSS. |
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private static final CSS css = new CSS(); |
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private int fontMask = 0; |
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int startOffset = 0; |
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int endOffset = 0; |
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/** |
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* Stores the attributes of the previous run. |
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* Used to compare with the current run's |
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* attributeset. If identical, then a |
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* <span> tag is not emitted. |
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*/ |
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private AttributeSet fontAttributes; |
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/** |
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* Maps from style name as held by the Document, to the archived |
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* style name (style name written out). These may differ. |
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*/ |
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private Hashtable<String, String> styleNameMapping; |
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/** |
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* Creates a new MinimalHTMLWriter. |
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* |
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* @param w Writer |
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* @param doc StyledDocument |
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* |
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*/ |
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public MinimalHTMLWriter(Writer w, StyledDocument doc) {
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super(w, doc); |
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} |
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/** |
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* Creates a new MinimalHTMLWriter. |
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* |
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* @param w Writer |
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* @param doc StyledDocument |
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* @param pos The location in the document to fetch the |
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* content. |
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* @param len The amount to write out. |
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* |
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*/ |
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public MinimalHTMLWriter(Writer w, StyledDocument doc, int pos, int len) {
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super(w, doc, pos, len); |
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} |
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/** |
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* Generates HTML output |
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* from a StyledDocument. |
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* |
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* @exception IOException on any I/O error |
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* @exception BadLocationException if pos represents an invalid |
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* location within the document. |
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* |
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*/ |
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public void write() throws IOException, BadLocationException {
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styleNameMapping = new Hashtable<String, String>(); |
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writeStartTag("<html>");
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writeHeader(); |
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writeBody(); |
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writeEndTag("</html>");
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} |
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/** |
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* Writes out all the attributes for the |
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* following types: |
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* StyleConstants.ParagraphConstants, |
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* StyleConstants.CharacterConstants, |
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* StyleConstants.FontConstants, |
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* StyleConstants.ColorConstants. |
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* The attribute name and value are separated by a colon. |
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* Each pair is separated by a semicolon. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeAttributes(AttributeSet attr) throws IOException {
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Enumeration attributeNames = attr.getAttributeNames(); |
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while (attributeNames.hasMoreElements()) {
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Object name = attributeNames.nextElement(); |
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if ((name instanceof StyleConstants.ParagraphConstants) || |
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(name instanceof StyleConstants.CharacterConstants) || |
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(name instanceof StyleConstants.FontConstants) || |
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(name instanceof StyleConstants.ColorConstants)) {
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indent(); |
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write(name.toString()); |
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write(':');
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write(css.styleConstantsValueToCSSValue |
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((StyleConstants)name, attr.getAttribute(name)). |
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toString()); |
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write(';');
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write(NEWLINE); |
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} |
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} |
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} |
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/** |
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* Writes out text. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void text(Element elem) throws IOException, BadLocationException {
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String contentStr = getText(elem); |
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if ((contentStr.length() > 0) && |
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(contentStr.charAt(contentStr.length()-1) == NEWLINE)) {
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contentStr = contentStr.substring(0, contentStr.length()-1); |
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} |
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if (contentStr.length() > 0) {
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write(contentStr); |
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} |
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} |
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/** |
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* Writes out a start tag appropriately |
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* indented. Also increments the indent level. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeStartTag(String tag) throws IOException {
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indent(); |
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write(tag); |
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write(NEWLINE); |
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incrIndent(); |
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} |
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/** |
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* Writes out an end tag appropriately |
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* indented. Also decrements the indent level. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeEndTag(String endTag) throws IOException {
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decrIndent(); |
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indent(); |
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write(endTag); |
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write(NEWLINE); |
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} |
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/** |
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* Writes out the <head> and <style> |
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* tags, and then invokes writeStyles() to write |
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* out all the named styles as the content of the |
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* <style> tag. The content is surrounded by |
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* valid HTML comment markers to ensure that the |
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* document is viewable in applications/browsers |
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* that do not support the tag. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeHeader() throws IOException {
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writeStartTag("<head>");
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writeStartTag("<style>");
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writeStartTag("<!--");
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writeStyles(); |
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writeEndTag("-->");
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writeEndTag("</style>");
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writeEndTag("</head>");
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} |
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/** |
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* Writes out all the named styles as the |
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* content of the <style> tag. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeStyles() throws IOException {
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/* |
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* Access to DefaultStyledDocument done to workaround |
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* a missing API in styled document to access the |
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* stylenames. |
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*/ |
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DefaultStyledDocument styledDoc = ((DefaultStyledDocument)getDocument()); |
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Enumeration styleNames = styledDoc.getStyleNames(); |
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while (styleNames.hasMoreElements()) {
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Style s = styledDoc.getStyle((String)styleNames.nextElement()); |
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/** PENDING: Once the name attribute is removed |
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from the list we check check for 0. **/ |
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if (s.getAttributeCount() == 1 && |
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s.isDefined(StyleConstants.NameAttribute)) {
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continue; |
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} |
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indent(); |
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write("p." + addStyleName(s.getName()));
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write(" {\n");
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incrIndent(); |
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writeAttributes(s); |
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decrIndent(); |
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indent(); |
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write("}\n");
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} |
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} |
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/** |
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* Iterates over the elements in the document |
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* and processes elements based on whether they are |
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* branch elements or leaf elements. This method specially handles |
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* leaf elements that are text. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeBody() throws IOException, BadLocationException {
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ElementIterator it = getElementIterator(); |
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/* |
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This will be a section element for a styled document. |
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We represent this element in HTML as the body tags. |
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Therefore we ignore it. |
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*/ |
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it.current(); |
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a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
2
diff
changeset
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Element next; |
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writeStartTag("<body>");
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boolean inContent = false; |
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while((next = it.next()) != null) {
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if (!inRange(next)) {
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continue; |
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} |
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if (next instanceof AbstractDocument.BranchElement) {
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if (inContent) {
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writeEndParagraph(); |
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inContent = false; |
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fontMask = 0; |
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} |
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writeStartParagraph(next); |
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} else if (isText(next)) {
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writeContent(next, !inContent); |
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inContent = true; |
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} else {
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writeLeaf(next); |
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inContent = true; |
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} |
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} |
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if (inContent) {
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writeEndParagraph(); |
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} |
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writeEndTag("</body>");
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} |
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/** |
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* Emits an end tag for a <p> |
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* tag. Before writing out the tag, this method ensures |
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* that all other tags that have been opened are |
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* appropriately closed off. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeEndParagraph() throws IOException {
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writeEndMask(fontMask); |
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if (inFontTag()) {
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endSpanTag(); |
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} else {
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write(NEWLINE); |
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} |
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writeEndTag("</p>");
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} |
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/** |
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* Emits the start tag for a paragraph. If |
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* the paragraph has a named style associated with it, |
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* then this method also generates a class attribute for the |
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* <p> tag and sets its value to be the name of the |
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* style. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeStartParagraph(Element elem) throws IOException {
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AttributeSet attr = elem.getAttributes(); |
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Object resolveAttr = attr.getAttribute(StyleConstants.ResolveAttribute); |
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if (resolveAttr instanceof StyleContext.NamedStyle) {
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writeStartTag("<p class=" + mapStyleName(((StyleContext.NamedStyle)resolveAttr).getName()) + ">");
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} else {
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writeStartTag("<p>");
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} |
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} |
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/** |
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* Responsible for writing out other non-text leaf |
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* elements. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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protected void writeLeaf(Element elem) throws IOException {
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indent(); |
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if (elem.getName() == StyleConstants.IconElementName) {
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writeImage(elem); |
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} else if (elem.getName() == StyleConstants.ComponentElementName) {
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writeComponent(elem); |
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} |
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} |
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||
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/** |
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* Responsible for handling Icon Elements; |
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* deliberately unimplemented. How to implement this method is |
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* an issue of policy. For example, if you're generating |
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* an <img> tag, how should you |
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* represent the src attribute (the location of the image)? |
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* In certain cases it could be a URL, in others it could |
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* be read from a stream. |
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* |
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* @param elem element of type StyleConstants.IconElementName |
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*/ |
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protected void writeImage(Element elem) throws IOException {
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} |
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||
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/** |
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* Responsible for handling Component Elements; |
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* deliberately unimplemented. |
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* How this method is implemented is a matter of policy. |
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*/ |
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protected void writeComponent(Element elem) throws IOException {
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} |
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||
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||
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/** |
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* Returns true if the element is a text element. |
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* |
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*/ |
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protected boolean isText(Element elem) {
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return (elem.getName() == AbstractDocument.ContentElementName); |
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} |
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||
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||
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/** |
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* Writes out the attribute set |
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* in an HTML-compliant manner. |
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* |
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* @exception IOException on any I/O error |
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* @exception BadLocationException if pos represents an invalid |
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* location within the document. |
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*/ |
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protected void writeContent(Element elem, boolean needsIndenting) |
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throws IOException, BadLocationException {
|
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||
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AttributeSet attr = elem.getAttributes(); |
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writeNonHTMLAttributes(attr); |
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if (needsIndenting) {
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indent(); |
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} |
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writeHTMLTags(attr); |
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text(elem); |
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} |
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||
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/** |
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* Generates |
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* bold <b>, italic <i>, and <u> tags for the |
|
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* text based on its attribute settings. |
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* |
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* @exception IOException on any I/O error |
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*/ |
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||
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protected void writeHTMLTags(AttributeSet attr) throws IOException {
|
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int oldMask = fontMask; |
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setFontMask(attr); |
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int endMask = 0; |
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int startMask = 0; |
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if ((oldMask & BOLD) != 0) {
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if ((fontMask & BOLD) == 0) {
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endMask |= BOLD; |
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} |
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} else if ((fontMask & BOLD) != 0) {
|
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startMask |= BOLD; |
|
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} |
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||
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if ((oldMask & ITALIC) != 0) {
|
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if ((fontMask & ITALIC) == 0) {
|
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endMask |= ITALIC; |
|
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} |
|
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} else if ((fontMask & ITALIC) != 0) {
|
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startMask |= ITALIC; |
|
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} |
|
470 |
||
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if ((oldMask & UNDERLINE) != 0) {
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if ((fontMask & UNDERLINE) == 0) {
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endMask |= UNDERLINE; |
|
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} |
|
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} else if ((fontMask & UNDERLINE) != 0) {
|
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startMask |= UNDERLINE; |
|
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} |
|
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writeEndMask(endMask); |
|
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writeStartMask(startMask); |
|
480 |
} |
|
481 |
||
482 |
||
483 |
/** |
|
484 |
* Tweaks the appropriate bits of fontMask |
|
485 |
* to reflect whether the text is to be displayed in |
|
486 |
* bold, italic, and/or with an underline. |
|
487 |
* |
|
488 |
*/ |
|
489 |
private void setFontMask(AttributeSet attr) {
|
|
490 |
if (StyleConstants.isBold(attr)) {
|
|
491 |
fontMask |= BOLD; |
|
492 |
} |
|
493 |
||
494 |
if (StyleConstants.isItalic(attr)) {
|
|
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fontMask |= ITALIC; |
|
496 |
} |
|
497 |
||
498 |
if (StyleConstants.isUnderline(attr)) {
|
|
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fontMask |= UNDERLINE; |
|
500 |
} |
|
501 |
} |
|
502 |
||
503 |
||
504 |
||
505 |
||
506 |
/** |
|
507 |
* Writes out start tags <u>, <i>, and <b> based on |
|
508 |
* the mask settings. |
|
509 |
* |
|
510 |
* @exception IOException on any I/O error |
|
511 |
*/ |
|
512 |
private void writeStartMask(int mask) throws IOException {
|
|
513 |
if (mask != 0) {
|
|
514 |
if ((mask & UNDERLINE) != 0) {
|
|
515 |
write("<u>");
|
|
516 |
} |
|
517 |
if ((mask & ITALIC) != 0) {
|
|
518 |
write("<i>");
|
|
519 |
} |
|
520 |
if ((mask & BOLD) != 0) {
|
|
521 |
write("<b>");
|
|
522 |
} |
|
523 |
} |
|
524 |
} |
|
525 |
||
526 |
/** |
|
527 |
* Writes out end tags for <u>, <i>, and <b> based on |
|
528 |
* the mask settings. |
|
529 |
* |
|
530 |
* @exception IOException on any I/O error |
|
531 |
*/ |
|
532 |
private void writeEndMask(int mask) throws IOException {
|
|
533 |
if (mask != 0) {
|
|
534 |
if ((mask & BOLD) != 0) {
|
|
535 |
write("</b>");
|
|
536 |
} |
|
537 |
if ((mask & ITALIC) != 0) {
|
|
538 |
write("</i>");
|
|
539 |
} |
|
540 |
if ((mask & UNDERLINE) != 0) {
|
|
541 |
write("</u>");
|
|
542 |
} |
|
543 |
} |
|
544 |
} |
|
545 |
||
546 |
||
547 |
/** |
|
548 |
* Writes out the remaining |
|
549 |
* character-level attributes (attributes other than bold, |
|
550 |
* italic, and underline) in an HTML-compliant way. Given that |
|
551 |
* attributes such as font family and font size have no direct |
|
552 |
* mapping to HTML tags, a <span> tag is generated and its |
|
553 |
* style attribute is set to contain the list of remaining |
|
554 |
* attributes just like inline styles. |
|
555 |
* |
|
556 |
* @exception IOException on any I/O error |
|
557 |
*/ |
|
558 |
protected void writeNonHTMLAttributes(AttributeSet attr) throws IOException {
|
|
559 |
||
560 |
String style = ""; |
|
561 |
String separator = "; "; |
|
562 |
||
563 |
if (inFontTag() && fontAttributes.isEqual(attr)) {
|
|
564 |
return; |
|
565 |
} |
|
566 |
||
567 |
boolean first = true; |
|
568 |
Color color = (Color)attr.getAttribute(StyleConstants.Foreground); |
|
569 |
if (color != null) {
|
|
570 |
style += "color: " + css.styleConstantsValueToCSSValue |
|
571 |
((StyleConstants)StyleConstants.Foreground, |
|
572 |
color); |
|
573 |
first = false; |
|
574 |
} |
|
575 |
Integer size = (Integer)attr.getAttribute(StyleConstants.FontSize); |
|
576 |
if (size != null) {
|
|
577 |
if (!first) {
|
|
578 |
style += separator; |
|
579 |
} |
|
580 |
style += "font-size: " + size.intValue() + "pt"; |
|
581 |
first = false; |
|
582 |
} |
|
583 |
||
584 |
String family = (String)attr.getAttribute(StyleConstants.FontFamily); |
|
585 |
if (family != null) {
|
|
586 |
if (!first) {
|
|
587 |
style += separator; |
|
588 |
} |
|
589 |
style += "font-family: " + family; |
|
590 |
first = false; |
|
591 |
} |
|
592 |
||
593 |
if (style.length() > 0) {
|
|
594 |
if (fontMask != 0) {
|
|
595 |
writeEndMask(fontMask); |
|
596 |
fontMask = 0; |
|
597 |
} |
|
598 |
startSpanTag(style); |
|
599 |
fontAttributes = attr; |
|
600 |
} |
|
601 |
else if (fontAttributes != null) {
|
|
602 |
writeEndMask(fontMask); |
|
603 |
fontMask = 0; |
|
604 |
endSpanTag(); |
|
605 |
} |
|
606 |
} |
|
607 |
||
608 |
||
609 |
/** |
|
610 |
* Returns true if we are currently in a <font> tag. |
|
611 |
*/ |
|
612 |
protected boolean inFontTag() {
|
|
613 |
return (fontAttributes != null); |
|
614 |
} |
|
615 |
||
616 |
/** |
|
617 |
* This is no longer used, instead <span> will be written out. |
|
618 |
* <p> |
|
619 |
* Writes out an end tag for the <font> tag. |
|
620 |
* |
|
621 |
* @exception IOException on any I/O error |
|
622 |
*/ |
|
623 |
protected void endFontTag() throws IOException {
|
|
624 |
write(NEWLINE); |
|
625 |
writeEndTag("</font>");
|
|
626 |
fontAttributes = null; |
|
627 |
} |
|
628 |
||
629 |
||
630 |
/** |
|
631 |
* This is no longer used, instead <span> will be written out. |
|
632 |
* <p> |
|
633 |
* Writes out a start tag for the <font> tag. |
|
634 |
* Because font tags cannot be nested, |
|
635 |
* this method closes out |
|
636 |
* any enclosing font tag before writing out a |
|
637 |
* new start tag. |
|
638 |
* |
|
639 |
* @exception IOException on any I/O error |
|
640 |
*/ |
|
641 |
protected void startFontTag(String style) throws IOException {
|
|
642 |
boolean callIndent = false; |
|
643 |
if (inFontTag()) {
|
|
644 |
endFontTag(); |
|
645 |
callIndent = true; |
|
646 |
} |
|
647 |
writeStartTag("<font style=\"" + style + "\">");
|
|
648 |
if (callIndent) {
|
|
649 |
indent(); |
|
650 |
} |
|
651 |
} |
|
652 |
||
653 |
/** |
|
654 |
* Writes out a start tag for the <font> tag. |
|
655 |
* Because font tags cannot be nested, |
|
656 |
* this method closes out |
|
657 |
* any enclosing font tag before writing out a |
|
658 |
* new start tag. |
|
659 |
* |
|
660 |
* @exception IOException on any I/O error |
|
661 |
*/ |
|
662 |
private void startSpanTag(String style) throws IOException {
|
|
663 |
boolean callIndent = false; |
|
664 |
if (inFontTag()) {
|
|
665 |
endSpanTag(); |
|
666 |
callIndent = true; |
|
667 |
} |
|
668 |
writeStartTag("<span style=\"" + style + "\">");
|
|
669 |
if (callIndent) {
|
|
670 |
indent(); |
|
671 |
} |
|
672 |
} |
|
673 |
||
674 |
/** |
|
675 |
* Writes out an end tag for the <span> tag. |
|
676 |
* |
|
677 |
* @exception IOException on any I/O error |
|
678 |
*/ |
|
679 |
private void endSpanTag() throws IOException {
|
|
680 |
write(NEWLINE); |
|
681 |
writeEndTag("</span>");
|
|
682 |
fontAttributes = null; |
|
683 |
} |
|
684 |
||
685 |
/** |
|
686 |
* Adds the style named <code>style</code> to the style mapping. This |
|
687 |
* returns the name that should be used when outputting. CSS does not |
|
688 |
* allow the full Unicode set to be used as a style name. |
|
689 |
*/ |
|
690 |
private String addStyleName(String style) {
|
|
691 |
if (styleNameMapping == null) {
|
|
692 |
return style; |
|
693 |
} |
|
|
7014
eb4fcf73ee99
6432566: Replace usage of StringBuffer with StringBuilder in Swing
rupashka
parents:
5506
diff
changeset
|
694 |
StringBuilder sb = null; |
| 2 | 695 |
for (int counter = style.length() - 1; counter >= 0; counter--) {
|
696 |
if (!isValidCharacter(style.charAt(counter))) {
|
|
697 |
if (sb == null) {
|
|
|
7014
eb4fcf73ee99
6432566: Replace usage of StringBuffer with StringBuilder in Swing
rupashka
parents:
5506
diff
changeset
|
698 |
sb = new StringBuilder(style); |
| 2 | 699 |
} |
700 |
sb.setCharAt(counter, 'a'); |
|
701 |
} |
|
702 |
} |
|
703 |
String mappedName = (sb != null) ? sb.toString() : style; |
|
704 |
while (styleNameMapping.get(mappedName) != null) {
|
|
705 |
mappedName = mappedName + 'x'; |
|
706 |
} |
|
707 |
styleNameMapping.put(style, mappedName); |
|
708 |
return mappedName; |
|
709 |
} |
|
710 |
||
711 |
/** |
|
712 |
* Returns the mapped style name corresponding to <code>style</code>. |
|
713 |
*/ |
|
714 |
private String mapStyleName(String style) {
|
|
715 |
if (styleNameMapping == null) {
|
|
716 |
return style; |
|
717 |
} |
|
|
1287
a04aca99c77a
6722802: Code improvement and warnings removing from the javax.swing.text package
rupashka
parents:
2
diff
changeset
|
718 |
String retValue = styleNameMapping.get(style); |
| 2 | 719 |
return (retValue == null) ? style : retValue; |
720 |
} |
|
721 |
||
722 |
private boolean isValidCharacter(char character) {
|
|
723 |
return ((character >= 'a' && character <= 'z') || |
|
724 |
(character >= 'A' && character <= 'Z')); |
|
725 |
} |
|
726 |
} |