wasm: Revamp QWasmInputContext

1. Use QWasmInputContext by default
2. Use QInputMethodEvent instead of KeyEvent

Todo:
    1. Platform dependent preedit control
        especially when cursor moved with preedit.
        (Tested on Android, Linux, Windows)
        (Firefox still has a problem but it's not clear
        why PointerEvent doesn't happen.)
    2. Apply existing text to inputMethodQueries.
    3. Test on touchscreen devices.
    4. Test on IOS devices.
    5. When dragging selection, freezing
    6. Support context menu

Fixes: QTBUG-107139
Fixes: QTBUG-124932
Fixes: QTBUG-117096
Pick-to: 6.7 6.8
Change-Id: Iceb6af3489b3d1195ad58cf8f3deb91275fd1bf4
Reviewed-by: Lorn Potter <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/plugins/platforms/wasm/qwasmclipboard.cpp b/src/plugins/platforms/wasm/qwasmclipboard.cpp
index 1aa3ffa5b36..2d00d9f723a 100644
--- a/src/plugins/platforms/wasm/qwasmclipboard.cpp
+++ b/src/plugins/platforms/wasm/qwasmclipboard.cpp
@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
 #include "qwasmclipboard.h"
+#include "qwasminputcontext.h"
 #include "qwasmdom.h"
 #include "qwasmevent.h"
 #include "qwasmwindow.h"
@@ -47,6 +48,10 @@ static void commonCopyEvent(val event)
 
 static void qClipboardCutTo(val event)
 {
+    QWasmInputContext *wasmInput = QWasmIntegration::get()->wasmInputContext();
+    if (wasmInput && wasmInput->usingTextInput())
+        return;
+
     if (!QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi()) {
         // Send synthetic Ctrl+X to make the app cut data to Qt's clipboard
          QWindowSystemInterface::handleKeyEvent(
@@ -58,6 +63,10 @@ static void qClipboardCutTo(val event)
 
 static void qClipboardCopyTo(val event)
 {
+    QWasmInputContext *wasmInput = QWasmIntegration::get()->wasmInputContext();
+    if (wasmInput && wasmInput->usingTextInput())
+        return;
+
     if (!QWasmIntegration::get()->getWasmClipboard()->hasClipboardApi()) {
         // Send synthetic Ctrl+C to make the app copy data to Qt's clipboard
             QWindowSystemInterface::handleKeyEvent(
@@ -68,6 +77,10 @@ static void qClipboardCopyTo(val event)
 
 static void qClipboardPasteTo(val event)
 {
+    QWasmInputContext *wasmInput = QWasmIntegration::get()->wasmInputContext();
+    if (wasmInput && wasmInput->usingTextInput())
+        return;
+
     event.call<void>("preventDefault"); // prevent browser from handling drop event
 
     QWasmIntegration::get()->getWasmClipboard()->sendClipboardData(event);