void HTMLTextFormControlElement::setInnerTextValue(const String& value)
{
    TextControlInnerTextElement* innerText = innerTextElement();
    if (!innerText)
        return;

    ASSERT(isTextFormControl());
    String previousValue = innerTextValueFrom(*innerText);
    bool textIsChanged = value != previousValue;
    if (textIsChanged || !innerText->hasChildNodes()) {
#if HAVE(ACCESSIBILITY) && !PLATFORM(COCOA)
        if (textIsChanged && renderer()) {
            if (AXObjectCache* cache = document().existingAXObjectCache())
                cache->postNotification(this, AXObjectCache::AXValueChanged, TargetObservableParent);
        }
#endif
        innerText->setInnerText(value, ASSERT_NO_EXCEPTION);

        if (value.endsWith('\n') || value.endsWith('\r'))
            innerText->appendChild(HTMLBRElement::create(document()), ASSERT_NO_EXCEPTION);

#if HAVE(ACCESSIBILITY) && PLATFORM(COCOA)
        if (textIsChanged && renderer()) {
            if (AXObjectCache* cache = document().existingAXObjectCache())
                cache->postTextReplacementNotification(this, AXTextEditTypeDelete, previousValue, AXTextEditTypeInsert, value, VisiblePosition(Position(this, Position::PositionIsBeforeAnchor)));
        }
#endif
    }

    setFormControlValueMatchesRenderer(true);
}

int RenderTextControl::textBlockLogicalWidth() const
{
    TextControlInnerTextElement* innerText = innerTextElement();
    ASSERT(innerText);

    LayoutUnit unitWidth = logicalWidth() - borderAndPaddingLogicalWidth();
    if (innerText->renderer())
        unitWidth -= innerText->renderBox()->paddingStart() + innerText->renderBox()->paddingEnd();

    return unitWidth;
}

String HTMLTextFormControlElement::valueWithHardLineBreaks() const
{
    // FIXME: It's not acceptable to ignore the HardWrap setting when there is no renderer.
    // While we have no evidence this has ever been a practical problem, it would be best to fix it some day.
    if (!isTextFormControl())
        return value();

    TextControlInnerTextElement* innerText = innerTextElement();
    if (!innerText)
        return value();

    RenderTextControlInnerBlock* renderer = innerText->renderer();
    if (!renderer)
        return value();

    Node* breakNode;
    unsigned breakOffset;
    RootInlineBox* line = renderer->firstRootBox();
    if (!line)
        return value();

    getNextSoftBreak(line, breakNode, breakOffset);

    StringBuilder result;
    for (Node* node = innerText->firstChild(); node; node = NodeTraversal::next(*node, innerText)) {
        if (is<HTMLBRElement>(*node))
            result.append(newlineCharacter);
        else if (is<Text>(*node)) {
            String data = downcast<Text>(*node).data();
            unsigned length = data.length();
            unsigned position = 0;
            while (breakNode == node && breakOffset <= length) {
                if (breakOffset > position) {
                    result.append(data, position, breakOffset - position);
                    position = breakOffset;
                    result.append(newlineCharacter);
                }
                getNextSoftBreak(line, breakNode, breakOffset);
            }
            result.append(data, position, length - position);
        }
        while (breakNode == node)
            getNextSoftBreak(line, breakNode, breakOffset);
    }
    stripTrailingNewline(result);
    return result.toString();
}

static String innerTextValueFrom(TextControlInnerTextElement& innerText)
{
    StringBuilder result;
    for (Node* node = innerText.firstChild(); node; node = NodeTraversal::next(*node, &innerText)) {
        if (is<HTMLBRElement>(*node))
            result.append(newlineCharacter);
        else if (is<Text>(*node))
            result.append(downcast<Text>(*node).data());
    }
    stripTrailingNewline(result);
    return result.toString();
}

PassRefPtr<Range> HTMLTextFormControlElement::selection() const
{
    if (!renderer() || !isTextFormControl() || !hasCachedSelection())
        return nullptr;

    int start = m_cachedSelectionStart;
    int end = m_cachedSelectionEnd;

    ASSERT(start <= end);
    TextControlInnerTextElement* innerText = innerTextElement();
    if (!innerText)
        return nullptr;

    if (!innerText->firstChild())
        return Range::create(document(), innerText, 0, innerText, 0);

    int offset = 0;
    Node* startNode = nullptr;
    Node* endNode = nullptr;
    for (Node* node = innerText->firstChild(); node; node = NodeTraversal::next(*node, innerText)) {
        ASSERT(!node->firstChild());
        ASSERT(node->isTextNode() || node->hasTagName(brTag));
        int length = node->isTextNode() ? lastOffsetInNode(node) : 1;

        if (offset <= start && start <= offset + length)
            setContainerAndOffsetForRange(node, start - offset, startNode, start);

        if (offset <= end && end <= offset + length) {
            setContainerAndOffsetForRange(node, end - offset, endNode, end);
            break;
        }

        offset += length;
    }

    if (!startNode || !endNode)
        return nullptr;

    return Range::create(document(), startNode, start, endNode, end);
}

void RenderTextControl::updateFromElement()
{
    TextControlInnerTextElement* innerText = innerTextElement();
    if (innerText && innerText->renderer())
        updateUserModifyProperty(textFormControlElement(), &innerText->renderer()->style());
}