Plug-In Image browser does not highlight the current page in dark theme

Temporary fix to disable the styling for current page (Hyperlink widget)
and setting white color to it (only if current theme is Dark Theme ).

Fixes eclipse-pde#822

ui/org.eclipse.pde.ui/META-INF/MANIFEST.MF

@@ -117,7 +117,8 @@ Require-Bundle:
  org.eclipse.team.ui;bundle-version="[3.10.200,4.0.0)",
  org.eclipse.help;bundle-version="[3.10.200,4.0.0)",
  org.eclipse.equinox.bidi;bundle-version="[1.4.300,2.0.0)",
- org.eclipse.equinox.security;bundle-version="[1.4.100,2.0.0)"
+ org.eclipse.equinox.security;bundle-version="[1.4.100,2.0.0)",
+ org.eclipse.e4.ui.css.swt.theme;bundle-version="0.14.200"
 Import-Package: aQute.bnd.build.model;version="[4.2.0,5.0.0)",
  aQute.bnd.header;version="[2.5.0,3.0.0)",
  aQute.bnd.help;version="2.0.0",

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/views/imagebrowser/ImageBrowserView.java

@@ -12,6 +12,7 @@
  *     Christian Pontesegger - initial API and implementation
  *     IBM Corporation - ongoing enhancements
  *     Alena Laskavaia - Bug 481613 pagination controls
+ *     Latha Patil	   - Issue 822 Current page in pagination control is not highlighted in Dark Theme
  *******************************************************************************/
 
 package org.eclipse.pde.internal.ui.views.imagebrowser;
@@ -27,6 +28,8 @@
 import org.eclipse.core.commands.NotEnabledException;
 import org.eclipse.core.commands.NotHandledException;
 import org.eclipse.core.commands.common.NotDefinedException;
+import org.eclipse.e4.ui.css.swt.theme.ITheme;
+import org.eclipse.e4.ui.css.swt.theme.IThemeEngine;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.layout.RowLayoutFactory;
@@ -87,10 +90,12 @@
  * Provides the PDE Image browser view which displays all icons and images from plug-ins.  The plug-ins
  * can be loaded from the target platform, the workspace or the current install.
  */
+@SuppressWarnings("restriction")
 public class ImageBrowserView extends ViewPart implements IImageTarget {
 
 	private static final String COMMAND_SAVE_TO_WORKSPACE = "org.eclipse.pde.ui.imagebrowser.saveToWorkspace"; //$NON-NLS-1$
 	protected final static String VIEW_ID = "org.eclipse.pde.ui.ImageBrowserView"; //$NON-NLS-1$
+	private static final String DISABLE_CSS = "org.eclipse.e4.ui.css.disabled"; //$NON-NLS-1$
 
 	private final UpdateUI mUIJob = new UpdateUI();
 
@@ -123,6 +128,7 @@ public class ImageBrowserView extends ViewPart implements IImageTarget {
 	private ImageElement imageElement;
 
 	private Action saveAction;
+	private boolean isDarkTheme = false;
 
 	public ImageBrowserView() {
 		// create default filters
@@ -144,6 +150,7 @@ public ImageBrowserView() {
 		mFilters.add(enabledIcons);
 		textPatternFilter = new StringFilter("*"); //$NON-NLS-1$
 		mFilters.add(textPatternFilter);
+		isDarkTheme = isDarkThemeApplied();
 	}
 
 	@Override
@@ -364,6 +371,16 @@ public void linkActivated(HyperlinkEvent e) {
 							scanImages();
 						}
 					});
+				} else {
+					// Remove Cursor for current page
+					pageLink.setCursor(null);
+					// FIXME :#1168 Issue (Current page is not highlighted in
+					// Dark theme) - This is the temporary fix provided . Actual
+					// fix has to be done in CSS styling.
+					if (isDarkTheme) {
+						pageLink.setData(DISABLE_CSS, Boolean.TRUE);
+						pageLink.setForeground(getDisplay().getSystemColor(SWT.COLOR_TRANSPARENT));
+						}
 				}
 
 			}
@@ -589,4 +606,13 @@ public void widgetDefaultSelected(SelectionEvent e) {
 
 		}
 	}
+
+	private boolean isDarkThemeApplied() {
+		IThemeEngine themeEngine = PlatformUI.getWorkbench().getService(IThemeEngine.class);
+		if (themeEngine != null) {
+			ITheme activeTheme = themeEngine.getActiveTheme();
+			return (activeTheme != null && activeTheme.getLabel() != null && activeTheme.getLabel().equals("Dark")); //$NON-NLS-1$
+		}
+		return false;
+	}
 }