Examples with IJsTranslator org.eclipse.wst.jsdt.web.core.javascript.IJsTranslator used on opensource projects

Example 1 with IJsTranslator

use of org.eclipse.wst.jsdt.web.core.javascript.IJsTranslator in project webtools.sourceediting by eclipse.

the class FormattingStrategyJSDT method format.

/*
	 * @see org.eclipse.jface.text.formatter.ContextBasedFormattingStrategy#format()
	 */
public void format() {
    super.format();
    final IStructuredDocument document = (IStructuredDocument) fDocuments.removeFirst();
    final TypedPosition partition = (TypedPosition) fPartitions.removeFirst();
    if (document != null) {
        // calculate the indent of the leading <script> tag because we need to add that indent level to the JS indent level
        IStructuredDocumentRegion scriptTagStartRegion = document.getRegionAtCharacterOffset(partition.offset - 1);
        // $NON-NLS-1$
        String scriptRegionIndent = "";
        if (scriptTagStartRegion != null) {
            try {
                int scriptRegionIndentLevel = getIndentOfLine(document, document.getLineOfOffset(scriptTagStartRegion.getStartOffset())).length();
                scriptRegionIndent = getIndentationString(getPreferences(), scriptRegionIndentLevel);
                this.startIndentLevel += scriptRegionIndentLevel;
            } catch (BadLocationException e) {
                // $NON-NLS-1$
                Logger.logException("Could not calculate starting indent of the script region, using 0", e);
            }
        }
        String lineDelim = TextUtilities.getDefaultLineDelimiter(document);
        try {
            // get the JS text from the document (not translated)
            String jsTextNotTranslated = document.get(partition.getOffset(), partition.getLength());
            String originalText = jsTextNotTranslated;
            // deal with getting the JS text and unwrapping it from any <!-- //--> statements
            String preText = "";
            String postText = lineDelim + scriptRegionIndent;
            // find and remove start comment tag if it's there
            // $NON-NLS-1$
            Pattern startPattern = Pattern.compile("(\\A(\\s*<!--.*(" + lineDelim + ")?))");
            Matcher matcher = startPattern.matcher(jsTextNotTranslated);
            if (matcher.find()) {
                preText = lineDelim + scriptRegionIndent + matcher.group().trim();
                // $NON-NLS-1$
                jsTextNotTranslated = matcher.replaceFirst("");
            }
            // find and remove end comment tag if it's there
            matcher = END_PATTERN.matcher(jsTextNotTranslated);
            if (matcher.find()) {
                // $NON-NLS-1$
                jsTextNotTranslated = matcher.replaceFirst("");
                postText = lineDelim + scriptRegionIndent + matcher.group().trim() + postText;
            }
            /*
				 * replace the text in the document with the non-translated JS
				 * text but without HTML leading and trailing comments
				 */
            int scriptLength = jsTextNotTranslated.length();
            TextEdit replaceEdit = null;
            if (scriptLength != originalText.length()) {
                replaceEdit = new ReplaceEdit(partition.getOffset(), partition.getLength(), jsTextNotTranslated);
                replaceEdit.apply(document);
            }
            // translate the web page without the script "wrapping"
            IJsTranslation translation = getTranslation(document);
            String jsTextTranslated = translation.getJsText();
            /*
				 * Set a default replace text that is the original contents
				 * with a new line and proper indentation in front
				 */
            String replaceText = lineDelim + getIndentationString(getPreferences(), startIndentLevel) + jsTextNotTranslated;
            int javaScriptOffset = ((JsTranslation) translation).getJavaScriptOffset(partition.getOffset());
            // known range, proceed
            if (javaScriptOffset >= 0) {
                // format the translated text
                TextEdit edit = CodeFormatterUtil.format2(CodeFormatter.K_JAVASCRIPT_UNIT, jsTextTranslated, javaScriptOffset, scriptLength, startIndentLevel, lineDelim, getPreferences());
                IDocument jsDoc = new Document(jsTextTranslated);
                if (edit != null) {
                    /*
						 * Put the original (possibly not JS) text back into the doc
						 * to which we're applying the edit
						 */
                    if (translation instanceof JsTranslation) {
                        IJsTranslator translator = ((JsTranslation) translation).getTranslator();
                        if (translator instanceof JsTranslator) {
                            Region[] regions = ((JsTranslator) translator).getGeneratedRanges();
                            Arrays.sort(regions, new Comparator() {

                                public int compare(Object o1, Object o2) {
                                    return ((IRegion) o1).getOffset() - ((IRegion) o2).getOffset();
                                }
                            });
                            /*
								 * for each web page range representing content needing replacements, replace it with the
								 * original web page's text
								 */
                            for (int r = 0; r < regions.length; ++r) {
                                int javascriptOffset = ((JsTranslation) translation).getJavaScriptOffset(regions[r].getOffset());
                                if (javascriptOffset > 0) {
                                    jsDoc.replace(javascriptOffset, regions[r].getLength(), document.get(regions[r].getOffset(), regions[r].getLength()));
                                }
                            }
                        }
                    }
                    edit.apply(jsDoc);
                    replaceText = lineDelim + getIndentationString(getPreferences(), startIndentLevel) + (jsDoc.get(edit.getOffset(), edit.getLength())).trim();
                } else {
                    /*
						 * Revert changes (it may still appear dirty, though,
						 * because of the above edits having been applied)
						 */
                    replaceEdit = new ReplaceEdit(partition.getOffset(), scriptLength, originalText);
                    replaceEdit.apply(document);
                    return;
                }
            }
            // apply edit to html doc using the formated translated text and the possible leading and trailing html comments
            replaceText = preText + replaceText + postText;
            replaceEdit = new ReplaceEdit(partition.getOffset(), scriptLength, replaceText);
            replaceEdit.apply(document);
        } catch (BadLocationException e) {
            Logger.logException(e);
        }
    }
}