processing/java/src/processing/mode/java/MarkerColumn.java at master · DINKIN/processing · GitHub

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/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */

Part of the Processing project - http://processing.org

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License version 2

as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software Foundation, Inc.

51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

package processing.mode.java;

import java.awt.Color;

import java.awt.Cursor;

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseMotionAdapter;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import javax.swing.JPanel;

import javax.swing.SwingWorker;

import javax.swing.text.BadLocationException;

import processing.app.Mode;

import processing.app.Sketch;

import processing.app.SketchCode;

import processing.app.Util;

import processing.app.ui.Editor;

import processing.core.PApplet;

import processing.mode.java.pdex.LineMarker;

import processing.mode.java.pdex.Problem;

/**

* Implements the column to the right of the editor window that displays ticks

* for errors and warnings.

* <br>

* All errors and warnings of a sketch are drawn on the bar, clicking on one,

* scrolls to the tab and location. Error messages displayed on hover. Markers

* are not in sync with the error line. Similar to Eclipse's right error bar

* which displays the overall errors in a document

public class MarkerColumn extends JPanel {

protected JavaEditor editor;

// static final int WIDE = 12;

private Color errorColor;

private Color warningColor;

// Stores error markers displayed PER TAB along the error bar.

private List<LineMarker> errorPoints =

Collections.synchronizedList(new ArrayList<LineMarker>());

public MarkerColumn(JavaEditor editor, int height) {

this.editor = editor;

Mode mode = editor.getMode();

errorColor = mode.getColor("editor.column.error.color");

warningColor = mode.getColor("editor.column.warning.color");

addMouseListener(new MouseAdapter() {

public void mouseClicked(MouseEvent e) {

scrollToMarkerAt(e.getY());

}

});

addMouseMotionListener(new MouseMotionAdapter() {

public void mouseMoved(final MouseEvent e) {

showMarkerHover(e.getY());

}

});

}

@Override

public void repaint() {

recalculateMarkerPositions();

super.repaint();

}

public void paintComponent(Graphics g) {

g.drawImage(editor.getJavaTextArea().getGutterGradient(),

0, 0, getWidth(), getHeight(), this);

for (LineMarker m : errorPoints) {

if (m.getType() == LineMarker.ERROR) {

g.setColor(errorColor);

} else {

g.setColor(warningColor);

}

g.drawLine(2, m.getY(), getWidth() - 2, m.getY());

}

public List<LineMarker> getErrorPoints() {

return errorPoints;

}

synchronized public void updateErrorPoints(final List<Problem> problems) {

// NOTE: ErrorMarkers are calculated for the present tab only Error Marker

// index in the arraylist is LOCALIZED for current tab. Also, update is in

// the UI thread via SwingWorker to prevent concurrency issues. [Manindra]

try {

new SwingWorker() {

protected Object doInBackground() throws Exception {

Sketch sketch = editor.getSketch();

int currentTab = sketch.getCurrentCodeIndex();

errorPoints = new ArrayList<>();

// Each problem.getSourceLine() will have an extra line added because

// of class declaration in the beginning as well as default imports

synchronized (problems) {

for (Problem problem : problems) {

if (problem.getTabIndex() == currentTab) {

errorPoints.add(new LineMarker(problem, problem.isError()));

}

recalculateMarkerPositions();

return null;

}

protected void done() {

repaint();

editor.getErrorChecker().updateEditorStatus();

}

}.execute();

} catch (Exception ex) {

ex.printStackTrace();

}

/** Find out which error/warning the user has clicked and scroll to it */

private void scrollToMarkerAt(final int y) {

try {

new SwingWorker() {

protected Object doInBackground() throws Exception {

LineMarker m = findClosestMarker(y);

if (m != null) {

editor.getErrorChecker().scrollToErrorLine(m.getProblem());

}

return null;

}

}.execute();

} catch (Exception ex) {

ex.printStackTrace();

}

@Override

public JToolTip createToolTip() {

return new ErrorToolTip(editor.getMode(), this);

}

/** Show tooltip on hover. */

private void showMarkerHover(final int y) {

try {

new SwingWorker() {

protected Object doInBackground() throws Exception {

LineMarker m = findClosestMarker(y);

if (m != null) {

Problem p = m.getProblem();

// String kind = p.isError() ?

// Language.text("editor.status.error") :

// Language.text("editor.status.warning");

// setToolTipText(kind + ": " + p.getMessage());

editor.statusToolTip(MarkerColumn.this, p.getMessage(), p.isError());

setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));

}

return null;

}

}.execute();

} catch (Exception ex) {

ex.printStackTrace();

}

private void recalculateMarkerPositions() {

List<LineMarker> errorPoints = getErrorPoints();

if (errorPoints != null && errorPoints.size() > 0) {

Sketch sketch = editor.getSketch();

SketchCode code = sketch.getCurrentCode();

int totalLines;

try {

totalLines = Util.countLines(code.getDocumentText());

} catch (BadLocationException e) {

e.printStackTrace();

totalLines = 1; // do not divide by zero

}

int visibleLines = editor.getTextArea().getVisibleLines();

totalLines = PApplet.max(totalLines, visibleLines);

for (LineMarker m : errorPoints) {

// Ratio of error line to total lines

float y = (m.getLineNumber() + 1) / ((float) totalLines);

// Ratio multiplied by height of the error bar

y *= getHeight();

y -= 15; // -15 is just a vertical offset

m.setY((int) y);

}

private LineMarker findClosestMarker(final int y) {

LineMarker closest = null;

int closestDist = Integer.MAX_VALUE;

for (LineMarker m : errorPoints) {

int dist = Math.abs(y - m.getY());

if (dist < 3 && dist < closestDist) {

closest = m;

closestDist = dist;

}

return closest;

}

public Dimension getPreferredSize() {

return new Dimension(Editor.RIGHT_GUTTER, super.getPreferredSize().height);

}

public Dimension getMinimumSize() {

return new Dimension(Editor.RIGHT_GUTTER, super.getMinimumSize().height);

}

processing/java/src/processing/mode/java/MarkerColumn.java at master · DINKIN/processing · GitHub

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