Source/core/html/ime/InputMethodContext.cpp

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * in the documentation and/or other materials provided with the
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#include "config.h"
#include "core/html/ime/InputMethodContext.h"

#include "core/editing/Editor.h"
#include "core/html/ime/Composition.h"
#include "core/page/EditorClient.h"
#include "core/page/Frame.h"
#include "core/page/Page.h"

namespace WebCore {

PassOwnPtr<InputMethodContext> InputMethodContext::create(HTMLElement* element)
{
    return adoptPtr(new InputMethodContext(element));
}

InputMethodContext::InputMethodContext(HTMLElement* element)
    : m_enabled(false)
    , m_composition(0)
    , m_element(element)
{
    ScriptWrappable::init(this);
}

InputMethodContext::~InputMethodContext()
{
}

Composition* InputMethodContext::composition() const
{
    // FIXME: Implement this. This should lazily update the composition object
    // here.
    return m_composition.get();
}

bool InputMethodContext::enabled() const
{
    // FIXME: Implement this. Enabled state may change between calls from user
    // action and the status should be retrieved here.
    return m_enabled;
}

void InputMethodContext::setEnabled(bool enabled)
{
    // FIXME: Implement this. The enabled state should propagate to IME.
    m_enabled = enabled;
}

String InputMethodContext::locale() const
{
    // FIXME: Implement this.
    return emptyString();
}

void InputMethodContext::confirmComposition()
{
    Frame* frame = m_element->document()->frame();
    if (!frame)
        return;
    Editor* editor = frame->editor();
    if (!editor->hasComposition())
        return;

    const Node* node = frame->document()->focusedNode();
    if (!node || !node->isHTMLElement() || m_element != toHTMLElement(node))
        return;

    // We should verify the parent node of this IME composition node are
    // editable because JavaScript may delete a parent node of the composition
    // node. In this case, WebKit crashes while deleting texts from the parent
    // node, which doesn't exist any longer.
    RefPtr<Range> range = editor->compositionRange();
    if (range) {
        Node* node = range->startContainer();
        if (!node || !node->isContentEditable())
            return;
    }

    // This resets input method and the composition string is committed.
    editor->client()->willSetInputMethodState();
}

void InputMethodContext::setCaretRectangle(Node* anchor, int x, int y, int w, int h)
{
    // FIXME: Implement this.
}

void InputMethodContext::setExclusionRectangle(Node* anchor, int x, int y, int w, int h)
{
    // FIXME: Implement this.
}

bool InputMethodContext::open()
{
    // FIXME: Implement this.
    return false;
}

} // namespace WebCore