1 files changed, 56 insertions, 0 deletions
diff --git a/pages/help_dialog.coffee b/pages/help_dialog.coffee
new file mode 100644
index 00000000..5bff5e33
--- /dev/null
+++ b/pages/help_dialog.coffee
@@ -0,0 +1,56 @@
+HelpDialog =
+  dialogElement: null
+
+  # This setting is pulled out of local storage. It's false by default.
+  getShowAdvancedCommands: -> Settings.get("helpDialog_showAdvancedCommands")
+
+  init: ->
+    return if @dialogElement?
+    @dialogElement = document.getElementById "vimiumHelpDialog"
+
+    @dialogElement.getElementsByClassName("closeButton")[0].addEventListener("click", (clickEvent) =>
+        clickEvent.preventDefault()
+        @hide()
+      false)
+    @dialogElement.getElementsByClassName("optionsPage")[0].addEventListener("click", (clickEvent) ->
+        clickEvent.preventDefault()
+        chrome.runtime.sendMessage({handler: "openOptionsPageInNewTab"})
+      false)
+    @dialogElement.getElementsByClassName("toggleAdvancedCommands")[0].addEventListener("click",
+      HelpDialog.toggleAdvancedCommands, false)
+
+  show: (html) ->
+    for placeholder, htmlString of html
+      @dialogElement.querySelector("#help-dialog-#{placeholder}").innerHTML = htmlString
+
+    @showAdvancedCommands(@getShowAdvancedCommands())
+
+    # Simulating a click on the help dialog makes it the active element for scrolling.
+    DomUtils.simulateClick document.getElementById "vimiumHelpDialog"
+
+  hide: -> UIComponentServer.postMessage "hide"
+
+  #
+  # Advanced commands are hidden by default so they don't overwhelm new and casual users.
+  #
+  toggleAdvancedCommands: (event) ->
+    event.preventDefault()
+    showAdvanced = HelpDialog.getShowAdvancedCommands()
+    HelpDialog.showAdvancedCommands(!showAdvanced)
+    Settings.set("helpDialog_showAdvancedCommands", !showAdvanced)
+
+  showAdvancedCommands: (visible) ->
+    HelpDialog.dialogElement.getElementsByClassName("toggleAdvancedCommands")[0].innerHTML =
+      if visible then "Hide advanced commands" else "Show advanced commands"
+
+    # Add/remove the showAdvanced class to show/hide advanced commands.
+    addOrRemove = if visible then "add" else "remove"
+    HelpDialog.dialogElement.classList[addOrRemove] "showAdvanced"
+
+UIComponentServer.registerHandler (event) ->
+  return if event.data == "hide"
+  HelpDialog.init()
+  HelpDialog.show event.data
+
+root = exports ? window
+root.HelpDialog = HelpDialog