1 files changed, 34 insertions, 0 deletions
diff --git a/background_scripts/marks.coffee b/background_scripts/marks.coffee
new file mode 100644
index 00000000..5b38a381
--- /dev/null
+++ b/background_scripts/marks.coffee
@@ -0,0 +1,34 @@
+root = window.Marks = {}
+
+marks = {}
+
+root.create = (req, sender) ->
+  marks[req.markName] =
+    tabId: sender.tab.id
+    scrollX: req.scrollX
+    scrollY: req.scrollY
+
+chrome.tabs.onUpdated.addListener (tabId, changeInfo, tab) ->
+  if changeInfo.url?
+    removeMarksForTab tabId
+
+chrome.tabs.onRemoved.addListener (tabId, removeInfo) ->
+  # XXX(jez): what about restored tabs?
+  removeMarksForTab tabId
+
+removeMarksForTab = (id) ->
+  for markName, mark of marks
+    if mark.tabId is id
+      delete marks[markName]
+
+root.goto = (req, sender) ->
+  mark = marks[req.markName]
+  chrome.tabs.update mark.tabId, selected: true
+  chrome.tabs.sendRequest mark.tabId,
+    name: "setScrollPosition"
+    scrollX: mark.scrollX
+    scrollY: mark.scrollY
+  chrome.tabs.sendRequest mark.tabId,
+    name: "showHUDforDuration",
+    text: "Jumped to global mark '#{req.markName}'"
+    duration: 1000