Fix input method update

Do the update after the input properties are changed in
RenderWidgetHostViewQt. Moreover, always update on input
state changes, like cursor position, surrounding text and
text selection (see QInputMethod::update() docs).

Task-number: QTBUG-70158
Task-number: QTBUG-71995
Change-Id: I9d5c6e299826fbe66f5285b648013ef79aabed9b
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 19 insertions, 12 deletions

diff --git a/src/core/render_widget_host_view_qt.cpp b/src/core/render_widget_host_view_qt.cpp
index 267460bdc..2326dbdf7 100644
--- a/src/core/render_widget_host_view_qt.cpp
+++ b/src/core/render_widget_host_view_qt.cpp
@@ -746,25 +746,29 @@ void RenderWidgetHostViewQt::OnUpdateTextInputStateCalled(content::TextInputMana
     Q_UNUSED(updated_view);
     Q_UNUSED(did_update_state);
 
-    ui::TextInputType type = getTextInputType();
-    m_delegate->inputMethodStateChanged(type != ui::TEXT_INPUT_TYPE_NONE, type == ui::TEXT_INPUT_TYPE_PASSWORD);
-    m_delegate->setInputMethodHints(toQtInputMethodHints(type));
-
     const content::TextInputState *state = text_input_manager_->GetTextInputState();
-    if (!state)
+    if (!state) {
+        m_delegate->inputMethodStateChanged(false /*editorVisible*/, false /*passwordInput*/);
+        m_delegate->setInputMethodHints(Qt::ImhNone);
         return;
+    }
 
-    // At this point it is unknown whether the text input state has been updated due to a text selection.
-    // Keep the cursor position updated for cursor movements too.
-    if (GetSelectedText().empty())
-        m_cursorPosition = state->selection_start;
+    ui::TextInputType type = getTextInputType();
+    m_delegate->setInputMethodHints(toQtInputMethodHints(getTextInputType()));
 
     m_surroundingText = QString::fromStdString(state->value);
-
     // Remove IME composition text from the surrounding text
     if (state->composition_start != -1 && state->composition_end != -1)
         m_surroundingText.remove(state->composition_start, state->composition_end - state->composition_start);
 
+    // In case of text selection, the update is expected in RenderWidgetHostViewQt::selectionChanged().
+    if (GetSelectedText().empty()) {
+        // At this point it is unknown whether the text input state has been updated due to a text selection.
+        // Keep the cursor position updated for cursor movements too.
+        m_cursorPosition = state->selection_start;
+        m_delegate->inputMethodStateChanged(type != ui::TEXT_INPUT_TYPE_NONE, type == ui::TEXT_INPUT_TYPE_PASSWORD);
+    }
+
     if (m_imState & ImStateFlags::TextInputStateUpdated) {
         m_imState = ImStateFlags::TextInputStateUpdated;
         return;
@@ -821,9 +825,10 @@ void RenderWidgetHostViewQt::selectionChanged()
 {
     // Reset input manager state
     m_imState = 0;
+    ui::TextInputType type = getTextInputType();
 
     // Handle text selection out of an input field
-    if (getTextInputType() == ui::TEXT_INPUT_TYPE_NONE) {
+    if (type == ui::TEXT_INPUT_TYPE_NONE) {
         if (GetSelectedText().empty() && m_emptyPreviousSelection)
             return;
 
@@ -843,12 +848,13 @@ void RenderWidgetHostViewQt::selectionChanged()
         // if the selection is cleared because TextInputState changes before the TextSelection change.
         Q_ASSERT(text_input_manager_->GetTextInputState());
         m_cursorPosition = text_input_manager_->GetTextInputState()->selection_start;
+        m_delegate->inputMethodStateChanged(true /*editorVisible*/, type == ui::TEXT_INPUT_TYPE_PASSWORD);
 
         m_anchorPositionWithinSelection = m_cursorPosition;
         m_cursorPositionWithinSelection = m_cursorPosition;
 
         if (!m_emptyPreviousSelection) {
-            m_emptyPreviousSelection = GetSelectedText().empty();
+            m_emptyPreviousSelection = true;
             m_adapterClient->selectionChanged();
         }
 
@@ -883,6 +889,7 @@ void RenderWidgetHostViewQt::selectionChanged()
         m_cursorPosition = newCursorPositionWithinSelection;
 
     m_emptyPreviousSelection = selection->selected_text().empty();
+    m_delegate->inputMethodStateChanged(true /*editorVisible*/, type == ui::TEXT_INPUT_TYPE_PASSWORD);
     m_adapterClient->selectionChanged();
 }