1 files changed, 85 insertions, 0 deletions
diff --git a/server/src/com/vaadin/terminal/LegacyPaint.java b/server/src/com/vaadin/terminal/LegacyPaint.java
new file mode 100644
index 0000000000..ea93e3db7f
--- /dev/null
+++ b/server/src/com/vaadin/terminal/LegacyPaint.java
@@ -0,0 +1,85 @@
+/* 
+@VaadinApache2LicenseForJavaFiles@
+ */
+package com.vaadin.terminal;
+
+import java.io.Serializable;
+
+import com.vaadin.terminal.PaintTarget.PaintStatus;
+import com.vaadin.ui.Component;
+import com.vaadin.ui.HasComponents;
+
+public class LegacyPaint implements Serializable {
+    /**
+     * 
+     * <p>
+     * Paints the Paintable into a UIDL stream. This method creates the UIDL
+     * sequence describing it and outputs it to the given UIDL stream.
+     * </p>
+     * 
+     * <p>
+     * It is called when the contents of the component should be painted in
+     * response to the component first being shown or having been altered so
+     * that its visual representation is changed.
+     * </p>
+     * 
+     * <p>
+     * <b>Do not override this to paint your component.</b> Override
+     * {@link #paintContent(PaintTarget)} instead.
+     * </p>
+     * 
+     * 
+     * @param target
+     *            the target UIDL stream where the component should paint itself
+     *            to.
+     * @throws PaintException
+     *             if the paint operation failed.
+     */
+    public static void paint(Component component, PaintTarget target)
+            throws PaintException {
+        // Only paint content of visible components.
+        if (!isVisibleInContext(component)) {
+            return;
+        }
+
+        final String tag = target.getTag(component);
+        final PaintStatus status = target.startPaintable(component, tag);
+        if (PaintStatus.CACHED == status) {
+            // nothing to do but flag as cached and close the paintable tag
+            target.addAttribute("cached", true);
+        } else {
+            // Paint the contents of the component
+            if (component instanceof Vaadin6Component) {
+                ((Vaadin6Component) component).paintContent(target);
+            }
+
+        }
+        target.endPaintable(component);
+
+    }
+
+    /**
+     * Checks if the component is visible and its parent is visible,
+     * recursively.
+     * <p>
+     * This is only a helper until paint is moved away from this class.
+     * 
+     * @return
+     */
+    protected static boolean isVisibleInContext(Component c) {
+        HasComponents p = c.getParent();
+        while (p != null) {
+            if (!p.isVisible()) {
+                return false;
+            }
+            p = p.getParent();
+        }
+        if (c.getParent() != null && !c.getParent().isComponentVisible(c)) {
+            return false;
+        }
+
+        // All parents visible, return this state
+        return c.isVisible();
+    }
+
+}