Opacity adjustments for image diffs

* ImageDiffHandler adds the slider; styled in gitblit.css
* imgdiff.js is a little bottom-loaded Javascript that adjusts the
  opacity on sliders' scroll events.
* The three diff pages add this bottom script to the page if needed
* GitBlitDiffFormatter: center image diffs.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/main/java/com/gitblit/wicket/pages/BlobDiffPage.java b/src/main/java/com/gitblit/wicket/pages/BlobDiffPage.java
index 517e80b8..71516ec8 100644
--- a/src/main/java/com/gitblit/wicket/pages/BlobDiffPage.java
+++ b/src/main/java/com/gitblit/wicket/pages/BlobDiffPage.java
@@ -55,6 +55,9 @@ public class BlobDiffPage extends RepositoryPage {
 			ImageDiffHandler handler = new ImageDiffHandler(getContextUrl(), repositoryName,

 					parent.getName(), commit.getName(), imageExtensions);

 			diff = DiffUtils.getDiff(r, commit, blobPath, DiffOutputType.HTML, handler).content;

+			if (handler.getImgDiffCount() > 0) {

+				addBottomScript("scripts/imgdiff.js"); // Tiny support script for image diffs

+			}

 			add(new BookmarkablePageLink<Void>("patchLink", PatchPage.class,

 					WicketUtils.newPathParameter(repositoryName, objectId, blobPath)));

 		} else {

@@ -63,6 +66,9 @@ public class BlobDiffPage extends RepositoryPage {
 			ImageDiffHandler handler = new ImageDiffHandler(getContextUrl(), repositoryName,

 					baseCommit.getName(), commit.getName(), imageExtensions);

 			diff = DiffUtils.getDiff(r, baseCommit, commit, blobPath, DiffOutputType.HTML, handler).content;

+			if (handler.getImgDiffCount() > 0) {

+				addBottomScript("scripts/imgdiff.js"); // Tiny support script for image diffs

+			}

 			add(new BookmarkablePageLink<Void>("patchLink", PatchPage.class,

 					WicketUtils.newBlobDiffParameter(repositoryName, baseObjectId, objectId,

 							blobPath)));