Development:Planning:Toolbar item validation

• Go Back
  • Must have at least one non-about:blank page previous to the current page in the current tab/window's session history to be enabled
• Go Forward
  • Must have at least one non-about:blank page subsequent to the current page in the current tab/window's session history to be enabled
• Reload Page
  • Disable when a page is in the "Looking up" stage. Disable when about:blank, about:bookmarks, or about:history are showing.
• Stop Loading
  • Disable when a page and all its associated elements have finished loading

    what about post-initial-load ajax stuff?

• Go Home
  • Disable when the current tab/window is displaying the home page

    what about multiple home pages?

• Location/Search
  • Always enabled
• Manage Bookmarks
  • Always enabled because it is a toggle; change icon state when the manager is open (Bug 235863
• Progress
  • Same as Stop Loading above?
• Print
  • Disable when viewing about:blank, about:config, about:history, about:bookmarks
• View Page Source
  • See discussion in Development:Planning:Internal URIs
• Bookmark Page
  • See discussion in Development:Planning:Menu item validation
• New Tab
  • Always enabled
• Close Tab
  • Disable when no tabs are present in the window, or when one tab is present but the tab bar is always shown
• Bigger Text
• Smaller Text
  • Disable both for about:blank, about:config, about:history, about:bookmarks, and tabs/windows of solely binary content
• Email Page Location
  • Disable for all about: URIs and all view-source: URIs
• Customize
  • Disable when currently customizing the toolbar (we already do this)
• Downloads
  • Always enabled; it either opens the Downloads window or focuses it if open (we already do this)
• Fill Form
  • Disable on all about: URIs, all view-source: URIs, all URIs of solely binary content, and, if possible, any page without form fields
• History
  • Disable only when the History view of the Bookmarks Manager is active