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Implement ScrollTop and ScrollLeft getters:

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Add new compositor message to get scroll_offset;
Add new layout query for computed value of overflow-x/y;
Implement layer_id method for ThreadSafeLayoutNode;
Add new layout query for layer_id;
Implement script interface for getting scrollTop and scrollLeft, as well as relavant helper functions.
This commit is contained in:
Zhen Zhang 2016-04-03 15:41:37 +08:00
parent f73c6143d5
commit fefdaf76de
12 changed files with 243 additions and 9 deletions
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28
components/layout/layout_thread.rs
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@ -45,10 +45,11 @@ use profile_traits::mem::{self, Report, ReportKind, ReportsChan};
use profile_traits::time::{TimerMetadataFrameType, TimerMetadataReflowType};
use profile_traits::time::{self, TimerMetadata, profile};
use query::{LayoutRPCImpl, process_content_box_request, process_content_boxes_request};
use query::{process_node_geometry_request, process_node_scroll_area_request, process_offset_parent_query};
use query::{process_resolved_style_request, process_margin_style_query};
use query::{process_node_geometry_request, process_node_layer_id_request, process_node_scroll_area_request};
use query::{process_node_overflow_request, process_resolved_style_request, process_margin_style_query};
use query::{process_offset_parent_query};
use script::dom::node::OpaqueStyleAndLayoutData;
use script::layout_interface::{LayoutRPC, OffsetParentResponse, MarginStyleResponse};
use script::layout_interface::{LayoutRPC, OffsetParentResponse, NodeOverflowResponse, MarginStyleResponse};
use script::layout_interface::{Msg, NewLayoutThreadInfo, Reflow, ReflowQueryType};
use script::layout_interface::{ScriptLayoutChan, ScriptReflow};
use script::reporter::CSSErrorReporter;
@ -117,9 +118,14 @@ pub struct LayoutThreadData {
/// A queued response for the client {top, left, width, height} of a node in pixels.
pub client_rect_response: Rect<i32>,
pub layer_id_response: Option<LayerId>,
/// A queued response for the node at a given point
pub hit_test_response: (Option<DisplayItemMetadata>, bool),
/// A pair of overflow property in x and y
pub overflow_response: NodeOverflowResponse,
/// A queued response for the scroll {top, left, width, height} of a node in pixels.
pub scroll_area_response: Rect<i32>,
@ -463,8 +469,10 @@ impl LayoutThread {
content_box_response: Rect::zero(),
content_boxes_response: Vec::new(),
client_rect_response: Rect::zero(),
layer_id_response: None,
hit_test_response: (None, false),
scroll_area_response: Rect::zero(),
overflow_response: NodeOverflowResponse(None),
resolved_style_response: None,
offset_parent_response: OffsetParentResponse::empty(),
margin_style_response: MarginStyleResponse::empty(),
@ -1015,9 +1023,15 @@ impl LayoutThread {
ReflowQueryType::NodeGeometryQuery(_) => {
rw_data.client_rect_response = Rect::zero();
},
ReflowQueryType::NodeLayerIdQuery(_) => {
rw_data.layer_id_response = None;
},
ReflowQueryType::NodeScrollGeometryQuery(_) => {
rw_data.scroll_area_response = Rect::zero();
},
ReflowQueryType::NodeOverflowQuery(_) => {
rw_data.overflow_response = NodeOverflowResponse(None);
},
ReflowQueryType::ResolvedStyleQuery(_, _, _) => {
rw_data.resolved_style_response = None;
},
@ -1177,6 +1191,14 @@ impl LayoutThread {
let node = unsafe { ServoLayoutNode::new(&node) };
rw_data.scroll_area_response = process_node_scroll_area_request(node, &mut root_flow);
},
ReflowQueryType::NodeOverflowQuery(node) => {
let node = unsafe { ServoLayoutNode::new(&node) };
rw_data.overflow_response = process_node_overflow_request(node);
},
ReflowQueryType::NodeLayerIdQuery(node) => {
let node = unsafe { ServoLayoutNode::new(&node) };
rw_data.layer_id_response = Some(process_node_layer_id_request(node));
},
ReflowQueryType::ResolvedStyleQuery(node, ref pseudo, ref property) => {
let node = unsafe { ServoLayoutNode::new(&node) };
rw_data.resolved_style_response =