1 files changed, 140 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/LintOverlay.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/LintOverlay.java
new file mode 100644
index 000000000..ca74493e8
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/LintOverlay.java
@@ -0,0 +1,140 @@
+/*
+ * 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;
+    }
+}