Module callbacks

Type definitions for various types of callbacks, as well as focus and scroll handling

Structs

• Callback
  Stores a function pointer that is executed when the given UI element is hit
• CallbackInfo
  Information about the callback that is passed to the callback whenever a callback is invoked
• DocumentId
• GlCallback
  Callbacks that returns a rendered OpenGL texture
• GlCallbackInfo
• HidpiAdjustedBounds
  Information about the bounds of a laid-out div rectangle.
• HitTestItem
• IFrameCallback
  Callback that, given a rectangle area on the screen, returns the DOM appropriate for that bounds (useful for infinite lists)
• IFrameCallbackInfo
• LayoutInfo
  Gives the layout() function access to the AppResources and the Window (for querying images and fonts, as well as width / height)
• LayoutInfoPtr
  Pointer to rust-allocated Box<LayoutInfo<'a>> struct
• ParentNodesIterator
  Iterator that, starting from a certain starting point, returns the parent node until it gets to the root node.
• PipelineId
• Ref
  The two-way binding system
• RefAny
• RefAnyPtr
  Pointer to rust-allocated Box<RefAny> struct
• ScrollPosition
  Information about a scroll frame, given to the user by the framework
• TimerCallback
  Callback that can runs on every frame on the main thread - can modify the app data model
• TimerCallbackInfo

Enums

• FocusTarget
  Defines the focus_targeted node ID for the next frame

Constants

• DontRedraw
  The screen does not need to redraw after the callback has been called.
• Redraw
  After the callback is called, the screen needs to redraw (layout() function being called again).

Functions

• call_callbacks
  The actual function that calls the callback in their proper hierarchy and order

Type Aliases

• CallbackReturn
• CallbackType
• GlCallbackReturn
• GlCallbackType
• IFrameCallbackReturn
• IFrameCallbackType
• LayoutCallback
  Callback function pointer (has to be a function pointer in order to be compatible with C APIs later on).
• PipelineSourceId
  This type carries no valuable semantics for WR. However, it reflects the fact that clients (Servo) may generate pipelines by different semi-independent sources. These pipelines still belong to the same IdNamespace and the same DocumentId. Having this extra Id field enables them to generate PipelineId without collision.
• TimerCallbackReturn
• TimerCallbackType
• UpdateScreen
  A callback function has to return if the screen should be updated after the function has run.