Source Code Cross Referenced for TextViewerGotoLineAction.java in  » IDE-Eclipse » ui » org » eclipse » ui » console » actions » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » ui » org.eclipse.ui.console.actions 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2000, 2006 IBM Corporation and others.
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         * 
008:         * Contributors:
009:         *     IBM Corporation - initial API and implementation
010:         *******************************************************************************/package org.eclipse.ui.console.actions;
011:
012:        import com.ibm.icu.text.MessageFormat;
013:
014:        import org.eclipse.jface.dialogs.IInputValidator;
015:        import org.eclipse.jface.dialogs.InputDialog;
016:        import org.eclipse.jface.text.BadLocationException;
017:        import org.eclipse.jface.text.IDocument;
018:        import org.eclipse.jface.text.ITextViewer;
019:        import org.eclipse.jface.window.Window;
020:        import org.eclipse.swt.graphics.Point;
021:        import org.eclipse.swt.widgets.Shell;
022:        import org.eclipse.ui.console.ConsolePlugin;
023:        import org.eclipse.ui.internal.console.ConsoleMessages;
024:
025:        /**
026:         * Action to position a text viewer to a specific line.
027:         * <p>
028:         * Clients may instantiate this class; this class is not intended to 
029:         * be subclassed.
030:         * </p>
031:         * @since 3.0
032:         */
033:        public class TextViewerGotoLineAction extends TextViewerAction {
034:
035:            /**
036:             * Validates whether the text found in the input field of the
037:             * dialog forms a valid line number, i.e. one to which can be 
038:             * jumped.
039:             */
040:            class NumberValidator implements  IInputValidator {
041:
042:                public String isValid(String input) {
043:                    try {
044:                        int i = Integer.parseInt(input);
045:                        if (i <= 0 || fLastLine < i)
046:                            return ConsoleMessages.TextViewerGotoLineAction_Line_number_out_of_range_1;
047:
048:                    } catch (NumberFormatException x) {
049:                        return ConsoleMessages.TextViewerGotoLineAction_Not_a_number_2;
050:                    }
051:
052:                    return null;
053:                }
054:            }
055:
056:            protected int fLastLine;
057:            protected ITextViewer fTextViewer;
058:
059:            /**
060:             * Constructs a goto line action for the viewer using the provided resource bundle
061:             */
062:            public TextViewerGotoLineAction(ITextViewer viewer) {
063:                super (viewer, -1);
064:                fTextViewer = viewer;
065:                setText(ConsoleMessages.TextViewerGotoLineAction_Go_to__Line____Ctrl_L_4);
066:                setToolTipText(ConsoleMessages.TextViewerGotoLineAction_Go_To_Line_1);
067:                setDescription(ConsoleMessages.TextViewerGotoLineAction_Go_To_Line_1);
068:            }
069:
070:            /**
071:             * @see TextViewerAction#update()
072:             */
073:            public void update() {
074:            }
075:
076:            /**
077:             * Jumps to the line.
078:             */
079:            protected void gotoLine(int line) {
080:
081:                IDocument document = fTextViewer.getDocument();
082:                try {
083:                    int start = document.getLineOffset(line);
084:                    int length = document.getLineLength(line);
085:                    fTextViewer.getTextWidget().setSelection(start,
086:                            start + length);
087:                    fTextViewer.revealRange(start, length);
088:                } catch (BadLocationException x) {
089:                    ConsolePlugin
090:                            .errorDialog(
091:                                    fTextViewer.getTextWidget().getShell(),
092:                                    ConsoleMessages.TextViewerGotoLineAction_Go_To_Line_1,
093:                                    ConsoleMessages.TextViewerGotoLineAction_Exceptions_occurred_attempt_to_go_to_line_2,
094:                                    x); // 
095:                }
096:            }
097:
098:            /* (non-Javadoc)
099:             * @see org.eclipse.jface.action.IAction#run()
100:             */
101:            public void run() {
102:                try {
103:                    Point selection = fTextViewer.getTextWidget()
104:                            .getSelection();
105:                    IDocument document = fTextViewer.getDocument();
106:                    fLastLine = document.getLineOfOffset(document.getLength()) + 1;
107:                    int startLine = selection == null ? 1 : fTextViewer
108:                            .getTextWidget().getLineAtOffset(selection.x) + 1;
109:                    String title = ConsoleMessages.TextViewerGotoLineAction_Go_To_Line_1;
110:                    String message = MessageFormat
111:                            .format(
112:                                    ConsoleMessages.TextViewerGotoLineAction_Enter_line_number__8,
113:                                    new Object[] { new Integer(fLastLine) });
114:                    String value = Integer.toString(startLine);
115:                    Shell activeShell = fTextViewer.getTextWidget().getShell();
116:                    InputDialog d = new InputDialog(activeShell, title,
117:                            message, value, new NumberValidator());
118:                    if (d.open() == Window.OK) {
119:                        try {
120:                            int line = Integer.parseInt(d.getValue());
121:                            gotoLine(line - 1);
122:                        } catch (NumberFormatException x) {
123:                            ConsolePlugin
124:                                    .errorDialog(
125:                                            activeShell,
126:                                            ConsoleMessages.TextViewerGotoLineAction_Go_To_Line_1,
127:                                            ConsoleMessages.TextViewerGotoLineAction_Exceptions_occurred_attempt_to_go_to_line_2,
128:                                            x); // 
129:                        }
130:                    }
131:                } catch (BadLocationException x) {
132:                    ConsolePlugin
133:                            .errorDialog(
134:                                    fTextViewer.getTextWidget().getShell(),
135:                                    ConsoleMessages.TextViewerGotoLineAction_Go_To_Line_1,
136:                                    ConsoleMessages.TextViewerGotoLineAction_Exceptions_occurred_attempt_to_go_to_line_2,
137:                                    x); // 
138:                    return;
139:                }
140:            }
141:        }
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