Auto merge of #20676 - fabricedesre:ime-embedding, r=cbrewster

Notify the embedder when it should display or hide an IME

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This adds a couple of embedder messages triggered when an editable element is focused or blured. The embedder also gets the type of data to edit so it can display a different keyboard type or a custom input method eg. for color choosing.

This is a partial fix for issue #12127

---
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- [X] `./mach build -d` does not report any errors
- [X] `./mach build-geckolib` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [X] These changes do not require tests because there are no tests for the embedding api :(

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1 files changed, 7 insertions, 1 deletions

diff --git a/components/compositing/compositor_thread.rs b/components/compositing/compositor_thread.rs
index 3d9a320c897..0b042ec5350 100644
--- a/components/compositing/compositor_thread.rs
+++ b/components/compositing/compositor_thread.rs
@@ -8,7 +8,7 @@ use SendableFrameTree;
 use compositor::CompositingReason;
 use gfx_traits::Epoch;
 use ipc_channel::ipc::IpcSender;
-use msg::constellation_msg::{Key, KeyModifiers, KeyState, PipelineId, TopLevelBrowsingContextId};
+use msg::constellation_msg::{InputMethodType, Key, KeyModifiers, KeyState, PipelineId, TopLevelBrowsingContextId};
 use net_traits::image::base::Image;
 use profile_traits::mem;
 use profile_traits::time;
@@ -143,6 +143,10 @@ pub enum EmbedderMsg {
     Panic(TopLevelBrowsingContextId, String, Option<String>),
     /// Open dialog to select bluetooth device.
     GetSelectedBluetoothDevice(Vec<String>, IpcSender<Option<String>>),
+    /// Request to present an IME to the user when an editable element is focused.
+    ShowIME(TopLevelBrowsingContextId, InputMethodType),
+    /// Request to hide the IME when the editable element is blurred.
+    HideIME(TopLevelBrowsingContextId),
     /// Servo has shut down
     Shutdown,
 }
@@ -244,6 +248,8 @@ impl Debug for EmbedderMsg {
             EmbedderMsg::LoadComplete(..) => write!(f, "LoadComplete"),
             EmbedderMsg::Panic(..) => write!(f, "Panic"),
             EmbedderMsg::GetSelectedBluetoothDevice(..) => write!(f, "GetSelectedBluetoothDevice"),
+            EmbedderMsg::ShowIME(..) => write!(f, "ShowIME"),
+            EmbedderMsg::HideIME(..) => write!(f, "HideIME"),
             EmbedderMsg::Shutdown => write!(f, "Shutdown"),
         }
     }