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-rw-r--r--third_party/webrender/examples/scrolling.rs243
1 files changed, 0 insertions, 243 deletions
diff --git a/third_party/webrender/examples/scrolling.rs b/third_party/webrender/examples/scrolling.rs
deleted file mode 100644
index 034af952449..00000000000
--- a/third_party/webrender/examples/scrolling.rs
+++ /dev/null
@@ -1,243 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-extern crate euclid;
-extern crate gleam;
-extern crate glutin;
-extern crate webrender;
-extern crate winit;
-
-#[path = "common/boilerplate.rs"]
-mod boilerplate;
-
-use crate::boilerplate::{Example, HandyDandyRectBuilder};
-use euclid::SideOffsets2D;
-use webrender::api::*;
-use webrender::render_api::*;
-use webrender::api::units::*;
-use winit::dpi::LogicalPosition;
-
-
-const EXT_SCROLL_ID_ROOT: u64 = 1;
-const EXT_SCROLL_ID_CONTENT: u64 = 2;
-
-struct App {
- cursor_position: WorldPoint,
- scroll_origin: LayoutPoint,
-}
-
-impl Example for App {
- fn render(
- &mut self,
- _api: &mut RenderApi,
- builder: &mut DisplayListBuilder,
- _txn: &mut Transaction,
- _device_size: DeviceIntSize,
- pipeline_id: PipelineId,
- _document_id: DocumentId,
- ) {
- let root_space_and_clip = SpaceAndClipInfo::root_scroll(pipeline_id);
- builder.push_simple_stacking_context(
- LayoutPoint::zero(),
- root_space_and_clip.spatial_id,
- PrimitiveFlags::IS_BACKFACE_VISIBLE,
- );
-
- if true {
- // scrolling and clips stuff
- // let's make a scrollbox
- let scrollbox = (0, 0).to(300, 400);
- builder.push_simple_stacking_context(
- LayoutPoint::new(10., 10.),
- root_space_and_clip.spatial_id,
- PrimitiveFlags::IS_BACKFACE_VISIBLE,
- );
- // set the scrolling clip
- let space_and_clip1 = builder.define_scroll_frame(
- &root_space_and_clip,
- ExternalScrollId(EXT_SCROLL_ID_ROOT, PipelineId::dummy()),
- (0, 0).by(1000, 1000),
- scrollbox,
- ScrollSensitivity::ScriptAndInputEvents,
- LayoutVector2D::zero(),
- );
-
- // now put some content into it.
- // start with a white background
- let info = CommonItemProperties::new((0, 0).to(1000, 1000), space_and_clip1);
- builder.push_hit_test(&info, (0, 1));
- builder.push_rect(&info, info.clip_rect, ColorF::new(1.0, 1.0, 1.0, 1.0));
-
- // let's make a 50x50 blue square as a visual reference
- let info = CommonItemProperties::new((0, 0).to(50, 50), space_and_clip1);
- builder.push_hit_test(&info, (0, 2));
- builder.push_rect(&info, info.clip_rect, ColorF::new(0.0, 0.0, 1.0, 1.0));
-
- // and a 50x50 green square next to it with an offset clip
- // to see what that looks like
- let info = CommonItemProperties::new(
- (50, 0).to(100, 50).intersection(&(60, 10).to(110, 60)).unwrap(),
- space_and_clip1,
- );
- builder.push_hit_test(&info, (0, 3));
- builder.push_rect(&info, info.clip_rect, ColorF::new(0.0, 1.0, 0.0, 1.0));
-
- // Below the above rectangles, set up a nested scrollbox. It's still in
- // the same stacking context, so note that the rects passed in need to
- // be relative to the stacking context.
- let space_and_clip2 = builder.define_scroll_frame(
- &space_and_clip1,
- ExternalScrollId(EXT_SCROLL_ID_CONTENT, PipelineId::dummy()),
- (0, 100).to(300, 1000),
- (0, 100).to(200, 300),
- ScrollSensitivity::ScriptAndInputEvents,
- LayoutVector2D::zero(),
- );
-
- // give it a giant gray background just to distinguish it and to easily
- // visually identify the nested scrollbox
- let info = CommonItemProperties::new(
- (-1000, -1000).to(5000, 5000),
- space_and_clip2,
- );
- builder.push_hit_test(&info, (0, 4));
- builder.push_rect(&info, info.clip_rect, ColorF::new(0.5, 0.5, 0.5, 1.0));
-
- // add a teal square to visualize the scrolling/clipping behaviour
- // as you scroll the nested scrollbox
- let info = CommonItemProperties::new((0, 200).to(50, 250), space_and_clip2);
- builder.push_hit_test(&info, (0, 5));
- builder.push_rect(&info, info.clip_rect, ColorF::new(0.0, 1.0, 1.0, 1.0));
-
- // Add a sticky frame. It will "stick" twice while scrolling, once
- // at a margin of 10px from the bottom, for 40 pixels of scrolling,
- // and once at a margin of 10px from the top, for 60 pixels of
- // scrolling.
- let sticky_id = builder.define_sticky_frame(
- space_and_clip2.spatial_id,
- (50, 350).by(50, 50),
- SideOffsets2D::new(Some(10.0), None, Some(10.0), None),
- StickyOffsetBounds::new(-40.0, 60.0),
- StickyOffsetBounds::new(0.0, 0.0),
- LayoutVector2D::new(0.0, 0.0)
- );
-
- let info = CommonItemProperties::new(
- (50, 350).by(50, 50),
- SpaceAndClipInfo {
- spatial_id: sticky_id,
- clip_id: space_and_clip2.clip_id,
- },
- );
- builder.push_hit_test(&info, (0, 6));
- builder.push_rect(
- &info,
- info.clip_rect,
- ColorF::new(0.5, 0.5, 1.0, 1.0),
- );
-
- // just for good measure add another teal square further down and to
- // the right, which can be scrolled into view by the user
- let info = CommonItemProperties::new(
- (250, 350).to(300, 400),
- space_and_clip2,
- );
- builder.push_hit_test(&info, (0, 7));
- builder.push_rect(&info, info.clip_rect, ColorF::new(0.0, 1.0, 1.0, 1.0));
-
- builder.pop_stacking_context();
- }
-
- builder.pop_stacking_context();
- }
-
- fn on_event(&mut self, event: winit::WindowEvent, api: &mut RenderApi, document_id: DocumentId) -> bool {
- let mut txn = Transaction::new();
- match event {
- winit::WindowEvent::KeyboardInput {
- input: winit::KeyboardInput {
- state: winit::ElementState::Pressed,
- virtual_keycode: Some(key),
- ..
- },
- ..
- } => {
- let offset = match key {
- winit::VirtualKeyCode::Down => Some(LayoutVector2D::new(0.0, -10.0)),
- winit::VirtualKeyCode::Up => Some(LayoutVector2D::new(0.0, 10.0)),
- winit::VirtualKeyCode::Right => Some(LayoutVector2D::new(-10.0, 0.0)),
- winit::VirtualKeyCode::Left => Some(LayoutVector2D::new(10.0, 0.0)),
- _ => None,
- };
- let zoom = match key {
- winit::VirtualKeyCode::Key0 => Some(1.0),
- winit::VirtualKeyCode::Minus => Some(0.8),
- winit::VirtualKeyCode::Equals => Some(1.25),
- _ => None,
- };
-
- if let Some(offset) = offset {
- self.scroll_origin += offset;
-
- txn.scroll_node_with_id(
- self.scroll_origin,
- ExternalScrollId(EXT_SCROLL_ID_CONTENT, PipelineId::dummy()),
- ScrollClamping::ToContentBounds,
- );
- txn.generate_frame(0);
- }
- if let Some(zoom) = zoom {
- txn.set_pinch_zoom(ZoomFactor::new(zoom));
- txn.generate_frame(0);
- }
- }
- winit::WindowEvent::CursorMoved { position: LogicalPosition { x, y }, .. } => {
- self.cursor_position = WorldPoint::new(x as f32, y as f32);
- }
- winit::WindowEvent::MouseWheel { delta, .. } => {
- const LINE_HEIGHT: f32 = 38.0;
- let (dx, dy) = match delta {
- winit::MouseScrollDelta::LineDelta(dx, dy) => (dx, dy * LINE_HEIGHT),
- winit::MouseScrollDelta::PixelDelta(pos) => (pos.x as f32, pos.y as f32),
- };
-
- self.scroll_origin += LayoutVector2D::new(dx, dy);
-
- txn.scroll_node_with_id(
- self.scroll_origin,
- ExternalScrollId(EXT_SCROLL_ID_CONTENT, PipelineId::dummy()),
- ScrollClamping::ToContentBounds,
- );
-
- txn.generate_frame(0);
- }
- winit::WindowEvent::MouseInput { .. } => {
- let results = api.hit_test(
- document_id,
- None,
- self.cursor_position,
- );
-
- println!("Hit test results:");
- for item in &results.items {
- println!(" • {:?}", item);
- }
- println!("");
- }
- _ => (),
- }
-
- api.send_transaction(document_id, txn);
-
- false
- }
-}
-
-fn main() {
- let mut app = App {
- cursor_position: WorldPoint::zero(),
- scroll_origin: LayoutPoint::zero(),
- };
- boilerplate::main_wrapper(&mut app, None);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-02 02:23:56 +0000