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Removed root browsing context from constellation.

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This commit is contained in:
Alan Jeffrey 2017-05-18 20:44:31 -05:00
parent ad47d33511
commit 2fd925bac9
5 changed files with 181 additions and 153 deletions
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5
components/constellation/browsingcontext.rs
View file

@ -96,6 +96,11 @@ impl BrowsingContext {
self.instant = entry.instant;
self.load_data = entry.load_data;
}
/// Is this a top-level browsing context?
pub fn is_top_level(&self) -> bool {
self.id == self.top_level_id
}
}
/// An entry in a browsing context's session history.

306
components/constellation/constellation.rs
View file

@ -28,7 +28,7 @@
//! example tabs in a browser UI), and nested ones (typically caused
//! by `iframe` elements). Browsing contexts have a hierarchy
//! (typically caused by `iframe`s containing `iframe`s), giving rise
//! to a tree with a root top-level browsing context. The logical
//! to a forest whose roots are top-level browsing context. The logical
//! relationship between these types is:
//!
//! ```
@ -38,6 +38,7 @@
//! | | ------prev*--------> | | <---pipeline*-- | |
//! | | ------next*--------> | | +---------+
//! | | | |
//! | | <-top_level--------- | |
//! | | <-browsing_context-- | |
//! +------------+ +------------+
//! ```
@ -259,9 +260,6 @@ pub struct Constellation<Message, LTF, STF> {
/// we store a `SessionHistoryChange` object for the navigation in progress.
pending_changes: Vec<SessionHistoryChange>,
/// The root browsing context.
root_browsing_context_id: TopLevelBrowsingContextId,
/// The currently focused pipeline for key events.
focus_pipeline_id: Option<PipelineId>,
@ -355,7 +353,7 @@ impl WebDriverData {
/// This enum gives the possible states of preparing such an image.
#[derive(Debug, PartialEq)]
enum ReadyToSave {
NoRootBrowsingContext,
NoTopLevelBrowsingContext,
PendingChanges,
WebFontNotLoaded,
DocumentLoading,
@ -540,7 +538,6 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
pending_changes: vec!(),
// We initialize the namespace at 1, since we reserved namespace 0 for the constellation
next_pipeline_namespace_id: PipelineNamespaceId(1),
root_browsing_context_id: TopLevelBrowsingContextId::new(),
focus_pipeline_id: None,
time_profiler_chan: state.time_profiler_chan,
mem_profiler_chan: state.mem_profiler_chan,
@ -848,13 +845,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
let request = match request {
Ok(request) => request,
Err(err) => {
// Treat deserialization error the same as receiving a panic message
debug!("Deserialization failed ({:?}).", err);
let reason = format!("Deserialization failed ({})", err);
let root_browsing_context_id = self.root_browsing_context_id;
return self.handle_panic(root_browsing_context_id, reason, None);
}
Err(err) => return error!("Deserialization failed ({}).", err),
};
match request {
@ -912,7 +903,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
self.handle_get_browsing_context(pipeline_id, resp_chan);
}
FromCompositorMsg::GetPipeline(browsing_context_id, resp_chan) => {
debug!("constellation got get root pipeline message");
debug!("constellation got get pipeline message");
self.handle_get_pipeline(browsing_context_id, resp_chan);
}
FromCompositorMsg::GetFocusTopLevelBrowsingContext(resp_chan) => {
@ -1054,11 +1045,9 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
debug!("constellation got postMessage message");
self.handle_post_message_msg(browsing_context_id, origin, data);
}
FromScriptMsg::MozBrowserEvent(parent_pipeline_id, pipeline_id, event) => {
FromScriptMsg::MozBrowserEvent(pipeline_id, top_level_browsing_context_id, event) => {
debug!("constellation got mozbrowser event message");
self.handle_mozbrowser_event_msg(parent_pipeline_id,
pipeline_id,
event);
self.handle_mozbrowser_event_msg(pipeline_id, top_level_browsing_context_id, event);
}
FromScriptMsg::Focus(pipeline_id) => {
debug!("constellation got focus message");
@ -1259,10 +1248,15 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
self.mem_profiler_chan.send(mem::ProfilerMsg::Exit);
// TODO: exit before the root browsing context is initialized?
debug!("Removing root browsing context.");
let root_browsing_context_id = BrowsingContextId::from(self.root_browsing_context_id);
self.close_browsing_context(root_browsing_context_id, ExitPipelineMode::Normal);
// Close the top-level browsing contexts
let browsing_context_ids: Vec<BrowsingContextId> = self.browsing_contexts.values()
.filter(|browsing_context| browsing_context.is_top_level())
.map(|browsing_context| browsing_context.id)
.collect();
for browsing_context_id in browsing_context_ids {
debug!("Removing top-level browsing context {}.", browsing_context_id);
self.close_browsing_context(browsing_context_id, ExitPipelineMode::Normal);
}
// Close any pending changes and pipelines
while let Some(pending) = self.pending_changes.pop() {
@ -1362,14 +1356,13 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
fn handle_send_error(&mut self, pipeline_id: PipelineId, err: IpcError) {
// Treat send error the same as receiving a panic message
debug!("Pipeline {:?} send error ({}).", pipeline_id, err);
error!("Pipeline {} send error ({}).", pipeline_id, err);
let top_level_browsing_context_id = self.pipelines.get(&pipeline_id)
.map(|pipeline| pipeline.browsing_context_id)
.and_then(|browsing_context_id| self.browsing_contexts.get(&browsing_context_id))
.map(|browsing_context| browsing_context.top_level_id)
.unwrap_or(self.root_browsing_context_id);
let reason = format!("Send failed ({})", err);
self.handle_panic(top_level_browsing_context_id, reason, None);
.map(|pipeline| pipeline.top_level_browsing_context_id);
if let Some(top_level_browsing_context_id) = top_level_browsing_context_id {
let reason = format!("Send failed ({})", err);
self.handle_panic(top_level_browsing_context_id, reason, None);
}
}
fn handle_panic(&mut self,
@ -1424,6 +1417,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
let sandbox = IFrameSandboxState::IFrameSandboxed;
self.new_pipeline(new_pipeline_id, browsing_context_id, top_level_browsing_context_id, parent_info,
window_size, load_data.clone(), sandbox, false);
self.handle_load_start_msg(new_pipeline_id);
self.pending_changes.push(SessionHistoryChange {
top_level_browsing_context_id: top_level_browsing_context_id,
browsing_context_id: browsing_context_id,
@ -1439,12 +1433,11 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
entry: LogEntry)
{
debug!("Received log entry {:?}.", entry);
let top_level_browsing_context_id = top_level_browsing_context_id.unwrap_or(self.root_browsing_context_id);
match entry {
LogEntry::Panic(reason, backtrace) => {
match (entry, top_level_browsing_context_id) {
(LogEntry::Panic(reason, backtrace), Some(top_level_browsing_context_id)) => {
self.handle_panic(top_level_browsing_context_id, reason, Some(backtrace));
},
LogEntry::Error(reason) | LogEntry::Warn(reason) => {
(LogEntry::Panic(reason, _), _) | (LogEntry::Error(reason), _) | (LogEntry::Warn(reason), _) => {
// VecDeque::truncate is unstable
if WARNINGS_BUFFER_SIZE <= self.handled_warnings.len() {
self.handled_warnings.pop_front();
@ -1468,24 +1461,25 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
fn handle_init_load(&mut self, url: ServoUrl) {
let window_size = self.window_size.initial_viewport;
let root_pipeline_id = PipelineId::new();
let root_browsing_context_id = self.root_browsing_context_id;
self.focus_pipeline_id = Some(root_pipeline_id);
let pipeline_id = PipelineId::new();
let top_level_browsing_context_id = TopLevelBrowsingContextId::new();
let browsing_context_id = BrowsingContextId::from(top_level_browsing_context_id);
let load_data = LoadData::new(url.clone(), None, None, None);
let sandbox = IFrameSandboxState::IFrameUnsandboxed;
self.new_pipeline(root_pipeline_id,
BrowsingContextId::from(root_browsing_context_id),
root_browsing_context_id,
self.focus_pipeline_id = Some(pipeline_id);
self.new_pipeline(pipeline_id,
browsing_context_id,
top_level_browsing_context_id,
None,
Some(window_size),
load_data.clone(),
sandbox,
false);
self.handle_load_start_msg(root_pipeline_id);
self.handle_load_start_msg(pipeline_id);
self.pending_changes.push(SessionHistoryChange {
top_level_browsing_context_id: root_browsing_context_id,
browsing_context_id: BrowsingContextId::from(root_browsing_context_id),
new_pipeline_id: root_pipeline_id,
top_level_browsing_context_id: top_level_browsing_context_id,
browsing_context_id: browsing_context_id,
new_pipeline_id: pipeline_id,
load_data: load_data,
replace_instant: None,
});
@ -1507,7 +1501,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
let (browsing_context_id, parent_id) = match self.pipelines.get(&pipeline_id) {
Some(pipeline) => match pipeline.parent_info {
Some((parent_id, _)) => (pipeline.browsing_context_id, parent_id),
None => return warn!("Pipeline {} has no parent.", pipeline_id),
None => return debug!("Pipeline {} has no parent.", pipeline_id),
},
None => return warn!("Pipeline {} loaded after closure.", pipeline_id),
};
@ -1578,6 +1572,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
};
// Create the new pipeline, attached to the parent and push to pending changes
self.handle_load_start_msg(load_info.info.new_pipeline_id);
self.pending_changes.push(SessionHistoryChange {
top_level_browsing_context_id: load_info.info.top_level_browsing_context_id,
browsing_context_id: load_info.info.browsing_context_id,
@ -1643,6 +1638,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
assert!(!self.pipelines.contains_key(&new_pipeline_id));
self.pipelines.insert(new_pipeline_id, pipeline);
self.handle_load_start_msg(new_pipeline_id);
self.pending_changes.push(SessionHistoryChange {
top_level_browsing_context_id: top_level_browsing_context_id,
browsing_context_id: browsing_context_id,
@ -1689,8 +1685,15 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
pipeline_id: PipelineId,
message: String,
sender: IpcSender<bool>) {
let pipeline_isnt_root = self.pipelines.get(&pipeline_id).and_then(|pipeline| pipeline.parent_info).is_some();
let mozbrowser_modal_prompt = pipeline_isnt_root && PREFS.is_mozbrowser_enabled();
let top_level_browsing_context_id = self.pipelines.get(&pipeline_id)
.map(|pipeline| pipeline.top_level_browsing_context_id);
let browser_pipeline_id = top_level_browsing_context_id
.map(BrowsingContextId::from)
.and_then(|browsing_context_id| self.browsing_contexts.get(&browsing_context_id))
.and_then(|browsing_context| self.pipelines.get(&browsing_context.pipeline_id))
.and_then(|pipeline| pipeline.parent_info)
.map(|(browser_pipeline_id, _)| browser_pipeline_id);
let mozbrowser_modal_prompt = PREFS.is_mozbrowser_enabled() && browser_pipeline_id.is_some();
if mozbrowser_modal_prompt {
// https://developer.mozilla.org/en-US/docs/Web/Events/mozbrowsershowmodalprompt
@ -1698,17 +1701,9 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
let title = String::from("Alert");
let return_value = String::from("");
let event = MozBrowserEvent::ShowModalPrompt(prompt_type, title, message, return_value);
let root_browsing_context_id = BrowsingContextId::from(self.root_browsing_context_id);
let top_level_browsing_context_id = self.pipelines.get(&pipeline_id)
.and_then(|pipeline| self.browsing_contexts.get(&pipeline.browsing_context_id))
.map(|browsing_context| browsing_context.top_level_id);
match self.browsing_contexts.get(&root_browsing_context_id) {
None => warn!("Alert sent after root browsing context closure."),
Some(root_browsing_context) => match self.pipelines.get(&root_browsing_context.pipeline_id) {
None => warn!("Alert sent after root pipeline closure."),
Some(pipeline) => pipeline.trigger_mozbrowser_event(top_level_browsing_context_id, event),
}
match browser_pipeline_id.and_then(|id| self.pipelines.get(&id)) {
None => warn!("Alert sent after browser pipeline closure."),
Some(pipeline) => pipeline.trigger_mozbrowser_event(top_level_browsing_context_id, event),
}
}
@ -1740,14 +1735,13 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
let (browsing_context_id, parent_info) = match self.pipelines.get(&source_id) {
Some(pipeline) => (pipeline.browsing_context_id, pipeline.parent_info),
None => {
warn!("Pipeline {:?} loaded after closure.", source_id);
warn!("Pipeline {} loaded after closure.", source_id);
return None;
}
};
match parent_info {
Some((parent_pipeline_id, _)) => {
self.handle_load_start_msg(source_id);
// Message the constellation to find the script thread for this iframe
// Find the script thread for the pipeline containing the iframe
// and issue an iframe load through there.
let msg = ConstellationControlMsg::Navigate(parent_pipeline_id,
browsing_context_id,
@ -1763,14 +1757,12 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
if let Err(e) = result {
self.handle_send_error(parent_pipeline_id, e);
}
Some(source_id)
None
}
None => {
let root_browsing_context_id = self.root_browsing_context_id;
// Make sure no pending page would be overridden.
for change in &self.pending_changes {
if change.browsing_context_id == BrowsingContextId::from(root_browsing_context_id) {
if change.browsing_context_id == browsing_context_id {
// id that sent load msg is being changed already; abort
return None;
}
@ -1784,30 +1776,31 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
return None;
}
self.handle_load_start_msg(source_id);
// Being here means either there are no pending changes, or none of the pending
// changes would be overridden by changing the subframe associated with source_id.
// Create the new pipeline
let window_size = self.browsing_contexts.get(&BrowsingContextId::from(root_browsing_context_id))
.and_then(|browsing_context| browsing_context.size);
let (top_level_id, window_size, timestamp) = match self.browsing_contexts.get(&browsing_context_id) {
Some(context) => (context.top_level_id, context.size, context.instant),
None => {
warn!("Browsing context {} loaded after closure.", browsing_context_id);
return None;
}
};
let new_pipeline_id = PipelineId::new();
let sandbox = IFrameSandboxState::IFrameUnsandboxed;
let replace_instant = if replace {
self.browsing_contexts.get(&browsing_context_id).map(|browsing_context| browsing_context.instant)
} else {
None
};
let replace_instant = if replace { Some(timestamp) } else { None };
self.handle_load_start_msg(new_pipeline_id);
self.pending_changes.push(SessionHistoryChange {
top_level_browsing_context_id: root_browsing_context_id,
browsing_context_id: BrowsingContextId::from(root_browsing_context_id),
top_level_browsing_context_id: top_level_id,
browsing_context_id: browsing_context_id,
new_pipeline_id: new_pipeline_id,
load_data: load_data.clone(),
replace_instant: replace_instant,
});
self.new_pipeline(new_pipeline_id,
BrowsingContextId::from(root_browsing_context_id),
root_browsing_context_id,
browsing_context_id,
top_level_id,
None,
window_size,
load_data,
@ -1885,15 +1878,9 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
}
fn handle_key_msg(&mut self, ch: Option<char>, key: Key, state: KeyState, mods: KeyModifiers) {
// Send to the explicitly focused pipeline (if it exists), or the root
// browsing context's current pipeline. If neither exist, fall back to sending to
// the compositor below.
let root_browsing_context_id = BrowsingContextId::from(self.root_browsing_context_id);
let root_pipeline_id = self.browsing_contexts.get(&root_browsing_context_id)
.map(|root_browsing_context| root_browsing_context.pipeline_id);
let pipeline_id = self.focus_pipeline_id.or(root_pipeline_id);
match pipeline_id {
// Send to the explicitly focused pipeline. If it doesn't exist, fall back to sending to
// the compositor.
match self.focus_pipeline_id {
Some(pipeline_id) => {
let event = CompositorEvent::KeyEvent(ch, key, state, mods);
let msg = ConstellationControlMsg::SendEvent(pipeline_id, event);
@ -1958,8 +1945,8 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
}
fn handle_mozbrowser_event_msg(&mut self,
parent_pipeline_id: PipelineId,
pipeline_id: PipelineId,
top_level_browsing_context_id: TopLevelBrowsingContextId,
event: MozBrowserEvent) {
assert!(PREFS.is_mozbrowser_enabled());
@ -1967,12 +1954,9 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
// and pass the event to that script thread.
// If the pipeline lookup fails, it is because we have torn down the pipeline,
// so it is reasonable to silently ignore the event.
let top_level_browsing_context_id = self.pipelines.get(&pipeline_id)
.and_then(|pipeline| self.browsing_contexts.get(&pipeline.browsing_context_id))
.map(|browsing_context| browsing_context.top_level_id);
match self.pipelines.get(&parent_pipeline_id) {
Some(pipeline) => pipeline.trigger_mozbrowser_event(top_level_browsing_context_id, event),
None => warn!("Pipeline {:?} handling mozbrowser event after closure.", parent_pipeline_id),
match self.pipelines.get(&pipeline_id) {
Some(pipeline) => pipeline.trigger_mozbrowser_event(Some(top_level_browsing_context_id), event),
None => warn!("Pipeline {:?} handling mozbrowser event after closure.", pipeline_id),
}
}
@ -2195,6 +2179,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
};
self.new_pipeline(new_pipeline_id, browsing_context_id, top_level_id, parent_info,
window_size, load_data.clone(), sandbox, is_private);
self.handle_load_start_msg(new_pipeline_id);
self.pending_changes.push(SessionHistoryChange {
top_level_browsing_context_id: top_level_id,
browsing_context_id: browsing_context_id,
@ -2269,11 +2254,11 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
self.notify_history_changed(top_level_id);
// Set paint permissions correctly for the compositor layers.
self.send_frame_tree();
self.send_frame_tree(top_level_id);
// Update the owning iframe to point to the new pipeline id.
// This makes things like contentDocument work correctly.
if let Some((parent_pipeline_id, _)) = parent_info {
if let Some((parent_pipeline_id, frame_type)) = parent_info {
let msg = ConstellationControlMsg::UpdatePipelineId(parent_pipeline_id,
browsing_context_id, pipeline_id, UpdatePipelineIdReason::Traversal);
let result = match self.pipelines.get(&parent_pipeline_id) {
@ -2284,9 +2269,11 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
self.handle_send_error(parent_pipeline_id, e);
}
// If this is an iframe, send a mozbrowser location change event.
// If this is a mozbrowser iframe, send a mozbrowser location change event.
// This is the result of a back/forward traversal.
self.trigger_mozbrowserlocationchange(pipeline_id);
if frame_type == FrameType::MozBrowserIFrame {
self.trigger_mozbrowserlocationchange(top_level_id);
}
}
}
@ -2373,7 +2360,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
self.focus_pipeline_id = Some(change.new_pipeline_id);
}
let (evicted_id, new_context, navigated, location_changed) = if let Some(instant) = change.replace_instant {
let (evicted_id, new_context, navigated) = if let Some(instant) = change.replace_instant {
debug!("Replacing pipeline in existing browsing context with timestamp {:?}.", instant);
let entry = SessionHistoryEntry {
browsing_context_id: change.browsing_context_id,
@ -2382,7 +2369,7 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
instant: instant,
};
self.traverse_to_entry(entry);
(None, false, None, false)
(None, false, None)
} else if let Some(browsing_context) = self.browsing_contexts.get_mut(&change.browsing_context_id) {
debug!("Adding pipeline to existing browsing context.");
let old_pipeline_id = browsing_context.pipeline_id;
@ -2391,10 +2378,10 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
.checked_sub(PREFS.get("session-history.max-length").as_u64().unwrap_or(20) as usize)
.and_then(|index| browsing_context.prev.get_mut(index))
.and_then(|entry| entry.pipeline_id.take());
(evicted_id, false, Some(old_pipeline_id), true)
(evicted_id, false, Some(old_pipeline_id))
} else {
debug!("Adding pipeline to new browsing context.");
(None, true, None, true)
(None, true, None)
};
if let Some(evicted_id) = evicted_id {
@ -2419,12 +2406,13 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
self.notify_history_changed(change.top_level_browsing_context_id);
}
if location_changed {
self.trigger_mozbrowserlocationchange(change.new_pipeline_id);
// If the navigation is for a top-level browsing context, inform mozbrowser
if change.browsing_context_id == change.top_level_browsing_context_id {
self.trigger_mozbrowserlocationchange(change.top_level_browsing_context_id);
}
// Build frame tree
self.send_frame_tree();
self.send_frame_tree(change.top_level_browsing_context_id);
}
fn handle_activate_document_msg(&mut self, pipeline_id: PipelineId) {
@ -2484,17 +2472,20 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
/// to check if the output image is "stable" and can be written as a screenshot
/// for reftests.
/// Since this function is only used in reftests, we do not harden it against panic.
fn handle_is_ready_to_save_image(&mut self,
pipeline_states: HashMap<PipelineId, Epoch>) -> ReadyToSave {
fn handle_is_ready_to_save_image(&mut self, pipeline_states: HashMap<PipelineId, Epoch>) -> ReadyToSave {
// Note that this function can panic, due to ipc-channel creation failure.
// avoiding this panic would require a mechanism for dealing
// with low-resource scenarios.
//
// If there is no root browsing context yet, the initial page has
// If there is no focus browsing context yet, the initial page has
// not loaded, so there is nothing to save yet.
if !self.browsing_contexts.contains_key(&BrowsingContextId::from(self.root_browsing_context_id)) {
return ReadyToSave::NoRootBrowsingContext;
}
let top_level_browsing_context_id = self.focus_pipeline_id
.and_then(|pipeline_id| self.pipelines.get(&pipeline_id))
.map(|pipeline| pipeline.top_level_browsing_context_id);
let top_level_browsing_context_id = match top_level_browsing_context_id {
Some(id) => id,
None => return ReadyToSave::NoTopLevelBrowsingContext,
};
// If there are pending loads, wait for those to complete.
if !self.pending_changes.is_empty() {
@ -2509,13 +2500,13 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
// matches what the compositor has painted. If all these conditions
// are met, then the output image should not change and a reftest
// screenshot can safely be written.
for browsing_context in self.fully_active_browsing_contexts_iter(self.root_browsing_context_id) {
for browsing_context in self.fully_active_browsing_contexts_iter(top_level_browsing_context_id) {
let pipeline_id = browsing_context.pipeline_id;
debug!("Checking readiness of browsing context {}, pipeline {}.", browsing_context.id, pipeline_id);
let pipeline = match self.pipelines.get(&pipeline_id) {
None => {
warn!("Pipeline {:?} screenshot while closing.", pipeline_id);
warn!("Pipeline {} screenshot while closing.", pipeline_id);
continue;
},
Some(pipeline) => pipeline,
@ -2855,13 +2846,30 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
}
// Send the current frame tree to compositor
fn send_frame_tree(&mut self) {
fn send_frame_tree(&mut self, top_level_browsing_context_id: TopLevelBrowsingContextId) {
// This might be a mozbrowser iframe, so we need to climb the parent hierarchy,
// even though it's a top-level browsing context.
let mut browsing_context_id = BrowsingContextId::from(top_level_browsing_context_id);
let mut pipeline_id = match self.browsing_contexts.get(&browsing_context_id) {
Some(browsing_context) => browsing_context.pipeline_id,
None => return warn!("Sending frame tree for discarded browsing context {}.", browsing_context_id),
};
while let Some(pipeline) = self.pipelines.get(&pipeline_id) {
match pipeline.parent_info {
Some((parent_id, _)) => {
browsing_context_id = pipeline.browsing_context_id;
pipeline_id = parent_id;
},
None => break,
}
}
// Note that this function can panic, due to ipc-channel creation failure.
// avoiding this panic would require a mechanism for dealing
// with low-resource scenarios.
let root_browsing_context_id = BrowsingContextId::from(self.root_browsing_context_id);
debug!("Sending frame tree for browsing context {}.", root_browsing_context_id);
if let Some(frame_tree) = self.browsing_context_to_sendable(root_browsing_context_id) {
debug!("Sending frame tree for browsing context {}.", browsing_context_id);
if let Some(frame_tree) = self.browsing_context_to_sendable(browsing_context_id) {
let (chan, port) = ipc::channel().expect("Failed to create IPC channel!");
self.compositor_proxy.send(ToCompositorMsg::SetFrameTree(frame_tree,
chan));
@ -2874,29 +2882,32 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
// https://developer.mozilla.org/en-US/docs/Web/Events/mozbrowserlocationchange
// Note that this is a no-op if the pipeline is not a mozbrowser iframe
fn trigger_mozbrowserlocationchange(&self, pipeline_id: PipelineId) {
match self.pipelines.get(&pipeline_id) {
Some(pipeline) => if let Some((parent_id, FrameType::MozBrowserIFrame)) = pipeline.parent_info {
match self.pipelines.get(&parent_id) {
Some(parent) => {
let top_level_browsing_context_id = self.browsing_contexts.get(&pipeline.browsing_context_id)
.map(|browsing_context| browsing_context.top_level_id)
.unwrap_or(self.root_browsing_context_id);
let url = pipeline.url.to_string();
let can_go_forward = !self.joint_session_future_is_empty(top_level_browsing_context_id);
let can_go_back = !self.joint_session_past_is_empty(top_level_browsing_context_id);
let event = MozBrowserEvent::LocationChange(url, can_go_back, can_go_forward);
parent.trigger_mozbrowser_event(Some(top_level_browsing_context_id), event);
},
None => warn!("triggered mozbrowser location change on closed parent {}", parent_id),
}
},
None => warn!("triggered mozbrowser location change on closed pipeline {}", pipeline_id),
}
fn trigger_mozbrowserlocationchange(&self,
top_level_browsing_context_id: TopLevelBrowsingContextId)
{
let browsing_context_id = BrowsingContextId::from(top_level_browsing_context_id);
let pipeline_id = match self.browsing_contexts.get(&browsing_context_id) {
Some(browsing_context) => browsing_context.pipeline_id,
None => return warn!("mozbrowser location change on closed browsing context {}.", browsing_context_id),
};
let (url, parent_info) = match self.pipelines.get(&pipeline_id) {
Some(pipeline) => (pipeline.url.clone(), pipeline.parent_info),
None => return warn!("mozbrowser location change on closed pipeline {}.", pipeline_id),
};
let parent_id = match parent_info {
Some((parent_id, FrameType::MozBrowserIFrame)) => parent_id,
_ => return debug!("mozbrowser location change on a regular iframe {}", browsing_context_id),
};
let can_go_forward = !self.joint_session_future_is_empty(top_level_browsing_context_id);
let can_go_back = !self.joint_session_past_is_empty(top_level_browsing_context_id);
let event = MozBrowserEvent::LocationChange(url.to_string(), can_go_back, can_go_forward);
match self.pipelines.get(&parent_id) {
Some(parent) => parent.trigger_mozbrowser_event(Some(top_level_browsing_context_id), event),
None => return warn!("mozbrowser location change on closed parent {}", parent_id),
};
}
// https://developer.mozilla.org/en-US/docs/Web/Events/mozbrowsererror
// Note that this does not require the pipeline to be an immediate child of the root
fn trigger_mozbrowsererror(&mut self,
top_level_browsing_context_id: TopLevelBrowsingContextId,
reason: String,
@ -2923,19 +2934,20 @@ impl<Message, LTF, STF> Constellation<Message, LTF, STF>
let event = MozBrowserEvent::Error(MozBrowserErrorType::Fatal, reason, report);
let browsing_context_id = BrowsingContextId::from(top_level_browsing_context_id);
match self.browsing_contexts.get(&browsing_context_id) {
None => warn!("Mozbrowser error after top-level browsing context closed."),
Some(browsing_context) => match self.pipelines.get(&browsing_context.pipeline_id) {
None => warn!("Mozbrowser error after top-level pipeline closed."),
Some(pipeline) => match pipeline.parent_info {
None => pipeline.trigger_mozbrowser_event(None, event),
Some((parent_id, _)) => match self.pipelines.get(&parent_id) {
None => warn!("Mozbrowser error after root pipeline closed."),
Some(parent) => parent.trigger_mozbrowser_event(Some(top_level_browsing_context_id), event),
},
},
let pipeline_id = match self.browsing_contexts.get(&browsing_context_id) {
Some(browsing_context) => browsing_context.pipeline_id,
None => return warn!("Mozbrowser error after top-level browsing context closed."),
};
let parent_id = match self.pipelines.get(&pipeline_id) {
Some(pipeline) => match pipeline.parent_info {
Some((parent_id, FrameType::MozBrowserIFrame)) => parent_id,
_ => return pipeline.trigger_mozbrowser_event(None, event),
},
None => return warn!("Mozbrowser error on a closed pipeline {}", pipeline_id),
};
match self.pipelines.get(&parent_id) {
None => warn!("Mozbrowser error after parent pipeline {} closed.", parent_id),
Some(parent) => parent.trigger_mozbrowser_event(Some(top_level_browsing_context_id), event),
};
}

12
components/msg/constellation_msg.rs
View file

@ -318,6 +318,18 @@ impl From<TopLevelBrowsingContextId> for BrowsingContextId {
}
}
impl PartialEq<TopLevelBrowsingContextId> for BrowsingContextId {
fn eq(&self, rhs: &TopLevelBrowsingContextId) -> bool {
self.eq(&rhs.0)
}
}
impl PartialEq<BrowsingContextId> for TopLevelBrowsingContextId {
fn eq(&self, rhs: &BrowsingContextId) -> bool {
self.0.eq(rhs)
}
}
// We provide ids just for unit testing.
pub const TEST_NAMESPACE: PipelineNamespaceId = PipelineNamespaceId(1234);
pub const TEST_PIPELINE_INDEX: PipelineIndex = PipelineIndex(5678);

6
components/script/dom/document.rs
View file

@ -1521,11 +1521,11 @@ impl Document {
pub fn trigger_mozbrowser_event(&self, event: MozBrowserEvent) {
if PREFS.is_mozbrowser_enabled() {
if let Some((parent_pipeline_id, _)) = self.window.parent_info() {
let global_scope = self.window.upcast::<GlobalScope>();
let top_level_browsing_context_id = self.window.window_proxy().top_level_browsing_context_id();
let event = ConstellationMsg::MozBrowserEvent(parent_pipeline_id,
global_scope.pipeline_id(),
top_level_browsing_context_id,
event);
global_scope.constellation_chan().send(event).unwrap();
self.window.upcast::<GlobalScope>().constellation_chan().send(event).unwrap();
}
}
}

5
components/script_traits/script_msg.rs
View file

@ -104,9 +104,8 @@ pub enum ScriptMsg {
LoadUrl(PipelineId, LoadData, bool),
/// Post a message to the currently active window of a given browsing context.
PostMessage(BrowsingContextId, Option<ImmutableOrigin>, Vec<u8>),
/// Dispatch a mozbrowser event to the parent of this pipeline.
/// The first PipelineId is for the parent, the second is for the originating pipeline.
MozBrowserEvent(PipelineId, PipelineId, MozBrowserEvent),
/// Dispatch a mozbrowser event to the parent of a mozbrowser iframe.
MozBrowserEvent(PipelineId, TopLevelBrowsingContextId, MozBrowserEvent),
/// HTMLIFrameElement Forward or Back traversal.
TraverseHistory(TopLevelBrowsingContextId, TraversalDirection),
/// Gets the length of the joint session history from the constellation.