refactory: added UI removed from core plugin.

[phpeclipse.git] / net.sourceforge.phpeclipse.ui / src / net / sourceforge / phpeclipse / xml / ui / internal / text / AbstractDocumentProvider.java

diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/xml/ui/internal/text/AbstractDocumentProvider.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/xml/ui/internal/text/AbstractDocumentProvider.java
new file mode 100644 (file)
index 0000000..10d4fee
--- /dev/null
+++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/xml/ui/internal/text/AbstractDocumentProvider.java
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2002-2004 Widespace, OU and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ *     Igor Malinin - initial contribution
+ *
+ * $Id: AbstractDocumentProvider.java,v 1.3 2006-10-21 23:14:13 pombredanne Exp $
+ */
+
+package net.sourceforge.phpeclipse.xml.ui.internal.text;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import net.sourceforge.phpeclipse.ui.editor.I18NDocumentProvider;
+
+import org.eclipse.jface.text.rules.IWhitespaceDetector;
+
+/**
+ * 
+ * 
+ * @author Igor Malinin
+ */
+public abstract class AbstractDocumentProvider extends I18NDocumentProvider {
+       protected IWhitespaceDetector detector = new WhitespaceDetector();
+
+       /*
+        * @see org.eclipse.ui.editors.text.IStorageDocumentProvider#getDefaultEncoding()
+        */
+       public String getDefaultEncoding() {
+               return "UTF-8";
+       }
+
+       public String getDeclaredEncoding(InputStream in) throws IOException {
+               if (!in.markSupported()) {
+                       in = new BufferedInputStream(in, 512);
+               }
+
+               in.mark(512);
+               String encoding = super.getDeclaredEncoding(in);
+               if (encoding != null) {
+                       return encoding;
+               }
+
+               in.reset();
+
+               // check Prolog-Start <?xml
+               if (!skipXMLDecl(in)) {
+                       return null;
+               }
+
+               // detect 'encoding'
+               skipEncoding(in);
+
+               // read encoding
+               int delimiter;
+
+               while (true) {
+                       int ch = in.read();
+                       if (ch < 0) {
+                               return null;
+                       }
+
+                       if (detector.isWhitespace((char) ch)) {
+                               continue;
+                       }
+
+                       if (ch == '"' || ch == '\'') {
+                               delimiter = ch;
+                               break;
+                       }
+
+                       return null;
+               }
+
+               StringBuffer buf = new StringBuffer();
+
+               while (true) {
+                       int ch = in.read();
+                       if (ch < 0) {
+                               return null;
+                       }
+
+                       if (ch == delimiter) {
+                               break;
+                       }
+
+                       buf.append((char) ch);
+               }
+
+               return buf.toString();
+       }
+
+       private boolean skipXMLDecl(InputStream in) throws IOException {
+               int ch = in.read();
+               if (ch != '<') {
+                       return false;
+               }
+
+               ch = in.read();
+               if (ch != '?') {
+                       return false;
+               }
+
+               ch = in.read();
+               if (ch != 'x') {
+                       return false;
+               }
+
+               ch = in.read();
+               if (ch != 'm') {
+                       return false;
+               }
+
+               ch = in.read();
+               if (ch != 'l') {
+                       return false;
+               }
+
+               return true;
+       }
+
+       private boolean skipEncoding(InputStream in) throws IOException {
+               int ch = in.read();
+
+               boolean whitespace = false;
+
+               while (true) {
+                       if (ch < 0) {
+                               return false;
+                       }
+
+                       if (detector.isWhitespace((char) ch)) {
+                               ch = in.read();
+                               whitespace = true;
+                               continue;
+                       }
+
+                       if (ch == '?' || ch == '<') {
+                               return false;
+                       }
+
+                       if (ch != 'e') {
+                               ch = in.read();
+                               whitespace = false;
+                               continue;
+                       }
+
+                       if (!whitespace) {
+                               ch = in.read();
+                               continue;
+                       }
+
+                       if ((ch = in.read()) == 'n' && (ch = in.read()) == 'c'
+                                       && (ch = in.read()) == 'o' && (ch = in.read()) == 'd'
+                                       && (ch = in.read()) == 'i' && (ch = in.read()) == 'n'
+                                       && (ch = in.read()) == 'g') {
+                               break;
+                       }
+
+                       whitespace = false;
+               }
+
+               // '='
+               while (true) {
+                       ch = in.read();
+                       if (ch < 0) {
+                               return false;
+                       }
+
+                       if (detector.isWhitespace((char) ch)) {
+                               continue;
+                       }
+
+                       if (ch == '=') {
+                               break;
+                       }
+
+                       return false;
+               }
+
+               return true;
+       }
+}