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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.eclipse.org/org/documents/epl-v10.php
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ide.eclipse.adt.internal.editors.layout.gle2;
import com.android.ide.eclipse.adt.internal.editors.IconFactory;
import com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate;
import com.android.ide.eclipse.adt.internal.preferences.AdtPrefs;
import com.google.common.collect.Lists;
import org.eclipse.core.resources.IMarker;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Rectangle;
import org.w3c.dom.Node;
import java.util.Collection;
/**
* The {@link LintOverlay} paints an icon over each view that contains at least one
* lint error (unless the view is smaller than the icon)
*/
public class LintOverlay extends Overlay {
/** Approximate size of lint overlay icons */
static final int ICON_SIZE = 8;
/** Alpha to draw lint overlay icons with */
private static final int ALPHA = 192;
private final LayoutCanvas mCanvas;
private Image mWarningImage;
private Image mErrorImage;
/**
* Constructs a new {@link LintOverlay}
*
* @param canvas the associated canvas
*/
public LintOverlay(LayoutCanvas canvas) {
mCanvas = canvas;
}
@Override
public boolean isHiding() {
return super.isHiding() || !AdtPrefs.getPrefs().isLintOnSave();
}
@Override
public void paint(GC gc) {
LayoutEditorDelegate editor = mCanvas.getEditorDelegate();
Collection<Node> nodes = editor.getLintNodes();
if (nodes != null && !nodes.isEmpty()) {
// Copy list before iterating through it to avoid a concurrent list modification
// in case lint runs in the background while painting and updates this list
nodes = Lists.newArrayList(nodes);
ViewHierarchy hierarchy = mCanvas.getViewHierarchy();
Image icon = getWarningIcon();
ImageData imageData = icon.getImageData();
int iconWidth = imageData.width;
int iconHeight = imageData.height;
CanvasTransform mHScale = mCanvas.getHorizontalTransform();
CanvasTransform mVScale = mCanvas.getVerticalTransform();
// Right/bottom edges of the canvas image; don't paint overlays outside of
// that. (With for example RelativeLayouts with margins rendered on smaller
// screens than they are intended for this can happen.)
int maxX = mHScale.translate(0) + mHScale.getScaledImgSize();
int maxY = mVScale.translate(0) + mVScale.getScaledImgSize();
int oldAlpha = gc.getAlpha();
try {
gc.setAlpha(ALPHA);
for (Node node : nodes) {
CanvasViewInfo vi = hierarchy.findViewInfoFor(node);
if (vi != null) {
Rectangle bounds = vi.getAbsRect();
int x = mHScale.translate(bounds.x);
int y = mVScale.translate(bounds.y);
int w = mHScale.scale(bounds.width);
int h = mVScale.scale(bounds.height);
if (w < iconWidth || h < iconHeight) {
// Don't draw badges on tiny widgets (including those
// that aren't tiny but are zoomed out too far)
continue;
}
x += w - iconWidth;
y += h - iconHeight;
if (x > maxX || y > maxY) {
continue;
}
boolean isError = false;
IMarker marker = editor.getIssueForNode(vi.getUiViewNode());
if (marker != null) {
int severity = marker.getAttribute(IMarker.SEVERITY, 0);
isError = severity == IMarker.SEVERITY_ERROR;
}
icon = isError ? getErrorIcon() : getWarningIcon();
gc.drawImage(icon, x, y);
}
}
} finally {
gc.setAlpha(oldAlpha);
}
}
}
private Image getWarningIcon() {
if (mWarningImage == null) {
mWarningImage = IconFactory.getInstance().getIcon("warning-badge"); //$NON-NLS-1$
}
return mWarningImage;
}
private Image getErrorIcon() {
if (mErrorImage == null) {
mErrorImage = IconFactory.getInstance().getIcon("error-badge"); //$NON-NLS-1$
}
return mErrorImage;
}
}
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