diff options
author | Allan Sandfeld Jensen <allan.jensen@theqtcompany.com> | 2016-06-27 16:52:21 +0200 |
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committer | Allan Sandfeld Jensen <allan.jensen@theqtcompany.com> | 2016-06-27 16:52:35 +0200 |
commit | ec5a99b0515779ff5ec3df6bd657127b4e037823 (patch) | |
tree | c5dc52e8892b6740123469276dcb303a81d9fd56 /src/core/render_widget_host_view_qt.cpp | |
parent | 56bea56b2d8fabc4b09d41531177a22d9297ce2c (diff) | |
parent | 722732d1f089630ad517aef8f94325a51186b274 (diff) |
Merge remote-tracking branch 'origin/5.6' into 5.7
Change-Id: Ic6686df8f82f710a3441501b7eeaffe69fbcbdf7
Diffstat (limited to 'src/core/render_widget_host_view_qt.cpp')
-rw-r--r-- | src/core/render_widget_host_view_qt.cpp | 87 |
1 files changed, 75 insertions, 12 deletions
diff --git a/src/core/render_widget_host_view_qt.cpp b/src/core/render_widget_host_view_qt.cpp index 99e4da27e..f45db6bf4 100644 --- a/src/core/render_widget_host_view_qt.cpp +++ b/src/core/render_widget_host_view_qt.cpp @@ -239,6 +239,7 @@ RenderWidgetHostViewQt::RenderWidgetHostViewQt(content::RenderWidgetHost* widget , m_didFirstVisuallyNonEmptyLayout(false) , m_adapterClient(0) , m_imeInProgress(false) + , m_receivedEmptyImeText(false) , m_anchorPositionWithinSelection(0) , m_cursorPositionWithinSelection(0) , m_initPending(false) @@ -949,6 +950,19 @@ void RenderWidgetHostViewQt::handleMouseEvent(QMouseEvent* event) QCursor::setPos(m_lockedMousePosition); } + if (m_imeInProgress && event->type() == QMouseEvent::MouseButtonPress) { + m_imeInProgress = false; + // Tell input method to commit the pre-edit string entered so far, and finish the + // composition operation. +#ifdef Q_OS_WIN + // Yes the function name is counter-intuitive, but commit isn't actually implemented + // by the Windows QPA, and reset does exactly what is necessary in this case. + qApp->inputMethod()->reset(); +#else + qApp->inputMethod()->commit(); +#endif + } + m_host->ForwardMouseEvent(webEvent); } @@ -957,15 +971,16 @@ void RenderWidgetHostViewQt::handleKeyEvent(QKeyEvent *ev) if (IsMouseLocked() && ev->key() == Qt::Key_Escape && ev->type() == QEvent::KeyRelease) UnlockMouse(); - if (m_imeInProgress) { + if (m_receivedEmptyImeText) { // IME composition was not finished with a valid commit string. // We're getting the composition result in a key event. if (ev->key() != 0) { // The key event is not a result of an IME composition. Cancel IME. m_host->ImeCancelComposition(); - m_imeInProgress = false; + m_receivedEmptyImeText = false; } else { if (ev->type() == QEvent::KeyRelease) { + m_receivedEmptyImeText = false; m_host->ImeConfirmComposition(toString16(ev->text()), gfx::Range::InvalidRange(), false); m_imeInProgress = false; @@ -1005,6 +1020,25 @@ void RenderWidgetHostViewQt::handleInputMethodEvent(QInputMethodEvent *ev) const QList<QInputMethodEvent::Attribute> &attributes = ev->attributes(); std::vector<blink::WebCompositionUnderline> underlines; + auto ensureValidSelectionRange = [&]() { + if (!selectionRange.IsValid()) { + // We did not receive a valid selection range, hence the range is going to mark the + // cursor position. + int newCursorPosition = + (cursorPositionInPreeditString < 0) ? preeditString.length() + : cursorPositionInPreeditString; + selectionRange.set_start(newCursorPosition); + selectionRange.set_end(newCursorPosition); + } + }; + + auto setCompositionForPreEditString = [&](){ + ensureValidSelectionRange(); + m_host->ImeSetComposition(toString16(preeditString), + underlines, + selectionRange.start(), + selectionRange.end()); + }; Q_FOREACH (const QInputMethodEvent::Attribute &attribute, attributes) { switch (attribute.type) { @@ -1018,8 +1052,11 @@ void RenderWidgetHostViewQt::handleInputMethodEvent(QInputMethodEvent *ev) break; } case QInputMethodEvent::Cursor: - if (attribute.length) - cursorPositionInPreeditString = attribute.start; + // Always set the position of the cursor, even if it's marked invisible by Qt, otherwise + // there is no way the user will know which part of the composition string will be + // changed, when performing an IME-specific action (like selecting a different word + // suggestion). + cursorPositionInPreeditString = attribute.start; break; case QInputMethodEvent::Selection: selectionRange.set_start(qMin(attribute.start, (attribute.start + attribute.length))); @@ -1034,16 +1071,42 @@ void RenderWidgetHostViewQt::handleInputMethodEvent(QInputMethodEvent *ev) gfx::Range replacementRange = (replacementLength > 0) ? gfx::Range(replacementStart, replacementStart + replacementLength) : gfx::Range::InvalidRange(); m_host->ImeConfirmComposition(toString16(commitString), replacementRange, false); - m_imeInProgress = false; - } else if (!preeditString.isEmpty()) { - if (!selectionRange.IsValid()) { - // We did not receive a valid selection range, hence the range is going to mark the cursor position. - int newCursorPosition = (cursorPositionInPreeditString < 0) ? preeditString.length() : cursorPositionInPreeditString; - selectionRange.set_start(newCursorPosition); - selectionRange.set_end(newCursorPosition); + + // We might get a commit string and a pre-edit string in a single event, which means + // we need to confirm thećlast composition, and start a new composition. + if (!preeditString.isEmpty()) { + setCompositionForPreEditString(); + m_imeInProgress = true; + } else { + m_imeInProgress = false; } - m_host->ImeSetComposition(toString16(preeditString), underlines, selectionRange.start(), selectionRange.end()); + m_receivedEmptyImeText = false; + + } else if (!preeditString.isEmpty()) { + setCompositionForPreEditString(); m_imeInProgress = true; + m_receivedEmptyImeText = false; + } else { + // There are so-far two known cases, when an empty QInputMethodEvent is received. + // First one happens when backspace is used to remove the last character in the pre-edit + // string, thus signaling the end of the composition. + // The second one happens (on Windows) when a Korean char gets composed, but instead of + // the event having a commit string, both strings are empty, and the actual char is received + // as a QKeyEvent after the QInputMethodEvent is processed. + // In lieu of the second case, we can't simply cancel the composition on an empty event, + // and then add the Korean char when QKeyEvent is received, because that leads to text + // flickering in the textarea (or any other element). + // Instead we postpone the processing of the empty QInputMethodEvent by posting it + // to the same focused object, and cancelling the composition on the next event loop tick. + if (!m_receivedEmptyImeText && m_imeInProgress) { + m_receivedEmptyImeText = true; + m_imeInProgress = false; + QInputMethodEvent *eventCopy = new QInputMethodEvent(*ev); + QGuiApplication::postEvent(qApp->focusObject(), eventCopy); + } else { + m_receivedEmptyImeText = false; + m_host->ImeCancelComposition(); + } } } |