--- /dev/null
+package net.sourceforge.phpdt.internal.ui.text;
+
+/*
+ * (c) Copyright IBM Corp. 2000, 2001.
+ * All Rights Reserved.
+ */
+
+import java.io.IOException;
+import java.io.PushbackReader;
+import java.io.Reader;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import net.sourceforge.phpdt.internal.ui.PHPUIMessages;
+
+import org.eclipse.jface.text.TextPresentation;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.StyleRange;
+
+/**
+ * Reads the text contents from a reader of HTML contents and translates the
+ * tags or cut them out.
+ */
+public class HTML2TextReader extends SubstitutionTextReader {
+
+ private static final String LINE_DELIM = System.getProperty(
+ "line.separator", "\n"); //$NON-NLS-1$ //$NON-NLS-2$
+
+ private static final String EMPTY_STRING = ""; //$NON-NLS-1$
+
+ private static final Map fgEntityLookup;
+
+ private static final Set fgTags;
+
+ static {
+
+ fgTags = new HashSet();
+ fgTags.add("b"); //$NON-NLS-1$
+ fgTags.add("br"); //$NON-NLS-1$
+ fgTags.add("h5"); //$NON-NLS-1$
+ fgTags.add("p"); //$NON-NLS-1$
+ fgTags.add("dl"); //$NON-NLS-1$
+ fgTags.add("dt"); //$NON-NLS-1$
+ fgTags.add("dd"); //$NON-NLS-1$
+ fgTags.add("li"); //$NON-NLS-1$
+ fgTags.add("ul"); //$NON-NLS-1$
+ fgTags.add("pre"); //$NON-NLS-1$
+
+ fgEntityLookup = new HashMap(7);
+ fgEntityLookup.put("lt", "<"); //$NON-NLS-1$ //$NON-NLS-2$
+ fgEntityLookup.put("gt", ">"); //$NON-NLS-1$ //$NON-NLS-2$
+ fgEntityLookup.put("nbsp", " "); //$NON-NLS-1$ //$NON-NLS-2$
+ fgEntityLookup.put("amp", "&"); //$NON-NLS-1$ //$NON-NLS-2$
+ fgEntityLookup.put("circ", "^"); //$NON-NLS-1$ //$NON-NLS-2$
+ fgEntityLookup.put("tilde", "~"); //$NON-NLS-2$ //$NON-NLS-1$
+ fgEntityLookup.put("quot", "\""); //$NON-NLS-1$ //$NON-NLS-2$
+ }
+
+ private int fCounter = 0;
+
+ private TextPresentation fTextPresentation;
+
+ private int fBold = 0;
+
+ private int fStartOffset = -1;
+
+ private boolean fInParagraph = false;
+
+ private boolean fIsPreformattedText = false;
+
+ /**
+ * Transforms the html text from the reader to formatted text.
+ *
+ * @param presentation
+ * If not <code>null</code>, formattings will be applied to
+ * the presentation.
+ */
+ public HTML2TextReader(Reader reader, TextPresentation presentation) {
+ super(new PushbackReader(reader));
+ fTextPresentation = presentation;
+ }
+
+ public int read() throws IOException {
+ int c = super.read();
+ if (c != -1)
+ ++fCounter;
+ return c;
+ }
+
+ protected void startBold() {
+ if (fBold == 0)
+ fStartOffset = fCounter;
+ ++fBold;
+ }
+
+ protected void startPreformattedText() {
+ fIsPreformattedText = true;
+ setSkipWhitespace(false);
+ }
+
+ protected void stopPreformattedText() {
+ fIsPreformattedText = false;
+ setSkipWhitespace(true);
+ }
+
+ protected void stopBold() {
+ --fBold;
+ if (fBold == 0) {
+ if (fTextPresentation != null) {
+ fTextPresentation.addStyleRange(new StyleRange(fStartOffset,
+ fCounter - fStartOffset, null, null, SWT.BOLD));
+ }
+ fStartOffset = -1;
+ }
+ }
+
+ /**
+ * @see SubstitutionTextReader#computeSubstitution(char)
+ */
+ protected String computeSubstitution(int c) throws IOException {
+
+ if (c == '<')
+ return processHTMLTag();
+ else if (c == '&')
+ return processEntity();
+ else if (fIsPreformattedText)
+ return processPreformattedText(c);
+
+ return null;
+ }
+
+ private String html2Text(String html) {
+
+ String tag = html;
+ if ('/' == tag.charAt(0))
+ tag = tag.substring(1);
+
+ if (!fgTags.contains(tag))
+ return EMPTY_STRING;
+
+ if ("pre".equals(html)) { //$NON-NLS-1$
+ startPreformattedText();
+ return EMPTY_STRING;
+ }
+
+ if ("/pre".equals(html)) { //$NON-NLS-1$
+ stopPreformattedText();
+ return EMPTY_STRING;
+ }
+
+ if (fIsPreformattedText)
+ return EMPTY_STRING;
+
+ if ("b".equals(html)) { //$NON-NLS-1$
+ startBold();
+ return EMPTY_STRING;
+ }
+
+ if ("h5".equals(html) || "dt".equals(html)) { //$NON-NLS-1$ //$NON-NLS-2$
+ startBold();
+ return EMPTY_STRING;
+ }
+
+ if ("dl".equals(html)) //$NON-NLS-1$
+ return LINE_DELIM;
+
+ if ("dd".equals(html)) //$NON-NLS-1$
+ return "\t"; //$NON-NLS-1$
+
+ if ("li".equals(html)) //$NON-NLS-1$
+ return LINE_DELIM
+ + "\t" + PHPUIMessages.getString("HTML2TextReader.dash"); //$NON-NLS-1$ //$NON-NLS-2$
+
+ if ("/b".equals(html)) { //$NON-NLS-1$
+ stopBold();
+ return EMPTY_STRING;
+ }
+
+ if ("p".equals(html)) { //$NON-NLS-1$
+ fInParagraph = true;
+ return LINE_DELIM;
+ }
+
+ if ("br".equals(html)) //$NON-NLS-1$
+ return LINE_DELIM;
+
+ if ("/p".equals(html)) { //$NON-NLS-1$
+ boolean inParagraph = fInParagraph;
+ fInParagraph = false;
+ return inParagraph ? EMPTY_STRING : LINE_DELIM;
+ }
+
+ if ("/h5".equals(html) || "/dt".equals(html)) { //$NON-NLS-1$ //$NON-NLS-2$
+ stopBold();
+ return LINE_DELIM;
+ }
+
+ if ("/dd".equals(html)) //$NON-NLS-1$
+ return LINE_DELIM;
+
+ return EMPTY_STRING;
+ }
+
+ /*
+ * A '<' has been read. Process a html tag
+ */
+ private String processHTMLTag() throws IOException {
+
+ StringBuffer buf = new StringBuffer();
+ int ch;
+ do {
+
+ ch = nextChar();
+
+ while (ch != -1 && ch != '>') {
+ buf.append(Character.toLowerCase((char) ch));
+ ch = nextChar();
+ if (ch == '"') {
+ buf.append(Character.toLowerCase((char) ch));
+ ch = nextChar();
+ while (ch != -1 && ch != '"') {
+ buf.append(Character.toLowerCase((char) ch));
+ ch = nextChar();
+ }
+ }
+ if (ch == '<') {
+ unread(ch);
+ return '<' + buf.toString();
+ }
+ }
+
+ if (ch == -1)
+ return null;
+
+ int tagLen = buf.length();
+ // needs special treatment for comments
+ if ((tagLen >= 3 && "!--".equals(buf.substring(0, 3))) //$NON-NLS-1$
+ && !(tagLen >= 5 && "--!".equals(buf.substring(tagLen - 3)))) { //$NON-NLS-1$
+ // unfinished comment
+ buf.append(ch);
+ } else {
+ break;
+ }
+ } while (true);
+
+ return html2Text(buf.toString());
+ }
+
+ private String processPreformattedText(int c) {
+ if (c == '\r' || c == '\n')
+ fCounter++;
+ return null;
+ }
+
+ private void unread(int ch) throws IOException {
+ ((PushbackReader) getReader()).unread(ch);
+ }
+
+ protected String entity2Text(String symbol) {
+ if (symbol.length() > 1 && symbol.charAt(0) == '#') {
+ int ch;
+ try {
+ if (symbol.charAt(1) == 'x') {
+ ch = Integer.parseInt(symbol.substring(2), 16);
+ } else {
+ ch = Integer.parseInt(symbol.substring(1), 10);
+ }
+ return EMPTY_STRING + (char) ch;
+ } catch (NumberFormatException e) {
+ }
+ } else {
+ String str = (String) fgEntityLookup.get(symbol);
+ if (str != null) {
+ return str;
+ }
+ }
+ return "&" + symbol; // not found //$NON-NLS-1$
+ }
+
+ /*
+ * A '&' has been read. Process a entity
+ */
+ private String processEntity() throws IOException {
+ StringBuffer buf = new StringBuffer();
+ int ch = nextChar();
+ while (Character.isLetterOrDigit((char) ch) || ch == '#') {
+ buf.append((char) ch);
+ ch = nextChar();
+ }
+
+ if (ch == ';')
+ return entity2Text(buf.toString());
+
+ buf.insert(0, '&');
+ if (ch != -1)
+ buf.append((char) ch);
+ return buf.toString();
+ }
+}
\ No newline at end of file
git://secure.phpeclipse.com / phpeclipse.git / blobdiff