From 02f1447e2c08ac6d31a1f922b7c075f764c63e1e Mon Sep 17 00:00:00 2001
From: Fabian Jakobs <fabian.jakobs@web.de>
Date: Mon, 19 Dec 2011 12:02:42 +0100
Subject: [PATCH] emit scroll events

---
 lib/ace/editor.js           | 13 ++++++++-----
 lib/ace/virtual_renderer.js |  2 ++
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/lib/ace/editor.js b/lib/ace/editor.js
index 0ae8f9ad..e6eac8ef 100644
--- a/lib/ace/editor.js
+++ b/lib/ace/editor.js
@@ -61,6 +61,9 @@ var Editor = function(renderer, session) {
     var container = renderer.getContainerElement();
     this.container = container;
     this.renderer = renderer;
+    
+    renderer.on("scrollX", this._emit.bind(this, "scrollX"));
+    renderer.on("scrollY", this._emit.bind(this, "scrollY"));
 
     this.textInput  = new TextInput(renderer.getTextAreaContainer(), this);
     this.keyBinding = new KeyBinding(this);
@@ -177,7 +180,7 @@ var Editor = function(renderer, session) {
         this.renderer.scrollToRow(session.getScrollTopRow());
         this.renderer.updateFull();
 
-        this._dispatchEvent("changeSession", {
+        this._emit("changeSession", {
             session: session,
             oldSession: oldSession
         });
@@ -261,13 +264,13 @@ var Editor = function(renderer, session) {
     this.onFocus = function() {
         this.renderer.showCursor();
         this.renderer.visualizeFocus();
-        this._dispatchEvent("focus");
+        this._emit("focus");
     };
 
     this.onBlur = function() {
         this.renderer.hideCursor();
         this.renderer.visualizeBlur();
-        this._dispatchEvent("blur");
+        this._emit("blur");
     };
 
     this.onDocumentChange = function(e) {
@@ -281,7 +284,7 @@ var Editor = function(renderer, session) {
             lastRow = Infinity;
         this.renderer.updateLines(range.start.row, lastRow);
 
-        this._dispatchEvent("change", e);
+        this._emit("change", e);
 
         // update cursor because tab characters can influence the cursor position
         this.onCursorChange();
@@ -543,7 +546,7 @@ var Editor = function(renderer, session) {
 
         this.$selectionStyle = style;
         this.onSelectionChange();
-        this._dispatchEvent("changeSelectionStyle", {data: style});
+        this._emit("changeSelectionStyle", {data: style});
     };
 
     this.getSelectionStyle = function() {
diff --git a/lib/ace/virtual_renderer.js b/lib/ace/virtual_renderer.js
index 536096b1..5b9b8331 100644
--- a/lib/ace/virtual_renderer.js
+++ b/lib/ace/virtual_renderer.js
@@ -697,6 +697,7 @@ var VirtualRenderer = function(container, theme) {
         if (this.scrollTop !== scrollTop) {
             this.$loop.schedule(this.CHANGE_SCROLL);
             this.scrollTop = scrollTop;
+            this._emit("scrollY", scrollTop);
         }
     };
 
@@ -705,6 +706,7 @@ var VirtualRenderer = function(container, theme) {
             scrollLeft = 0;
 
         this.scroller.scrollLeft = scrollLeft;
+        this._emit("scrollX", this.scroller.scrollLeft);
     };
 
     this.scrollBy = function(deltaX, deltaY) {