Ejemplo n.º 1
0
static void updateCounters(RenderObject* renderer)
{
    ASSERT(renderer->style());
    const CounterDirectiveMap* directiveMap = renderer->style()->counterDirectives();
    if (!directiveMap)
        return;
    CounterDirectiveMap::const_iterator end = directiveMap->end();
    if (!renderer->hasCounterNodeMap()) {
        for (CounterDirectiveMap::const_iterator it = directiveMap->begin(); it != end; ++it)
            makeCounterNode(renderer, it->key, false);
        return;
    }
    CounterMap* counterMap = counterMaps().get(renderer);
    ASSERT(counterMap);
    for (CounterDirectiveMap::const_iterator it = directiveMap->begin(); it != end; ++it) {
        RefPtr<CounterNode> node = counterMap->get(it->key);
        if (!node) {
            makeCounterNode(renderer, it->key, false);
            continue;
        }
        RefPtr<CounterNode> newParent = 0;
        RefPtr<CounterNode> newPreviousSibling = 0;
        
        findPlaceForCounter(renderer, it->key, node->hasResetType(), newParent, newPreviousSibling);
        if (node != counterMap->get(it->key))
            continue;
        CounterNode* parent = node->parent();
        if (newParent == parent && newPreviousSibling == node->previousSibling())
            continue;
        if (parent)
            parent->removeChild(node.get());
        if (newParent)
            newParent->insertAfter(node.get(), newPreviousSibling.get(), it->key);
    }
}
Ejemplo n.º 2
0
PassRefPtr<StringImpl> RenderCounter::originalText() const
{
    if (!m_counterNode) {
        RenderObject* beforeAfterContainer = parent();
        while (true) {
            if (!beforeAfterContainer)
                return 0;
            if (!beforeAfterContainer->isAnonymous())
                return 0; // RenderCounters are restricted to before and after pseudo elements
            PseudoId containerStyle = beforeAfterContainer->style()->styleType();
            if ((containerStyle == BEFORE) || (containerStyle == AFTER))
                break;
            beforeAfterContainer = beforeAfterContainer->parent();
        }
        makeCounterNode(beforeAfterContainer, m_counter.identifier(), true)->addRenderer(const_cast<RenderCounter*>(this));
        ASSERT(m_counterNode);
    }
    CounterNode* child = m_counterNode;
    int value = child->actsAsReset() ? child->value() : child->countInParent();

    String text = listMarkerText(m_counter.listStyle(), value);

    if (!m_counter.separator().isNull()) {
        if (!child->actsAsReset())
            child = child->parent();
        while (CounterNode* parent = child->parent()) {
            text = listMarkerText(m_counter.listStyle(), child->countInParent())
                + m_counter.separator() + text;
            child = parent;
        }
    }

    return text.impl();
}
Ejemplo n.º 3
0
PassRefPtr<StringImpl> RenderCounter::originalText() const
{
    if (!parent())
        return 0;

    if (!m_counterNode)
        m_counterNode = makeCounterNode(parent(), m_counter.identifier(), true);

    CounterNode* child = m_counterNode;
    int value = child->actsAsReset() ? child->value() : child->countInParent();

    String text = listMarkerText(m_counter.listStyle(), value);

    if (!m_counter.separator().isNull()) {
        if (!child->actsAsReset())
            child = child->parent();
        while (CounterNode* parent = child->parent()) {
            text = listMarkerText(m_counter.listStyle(), child->countInParent())
                + m_counter.separator() + text;
            child = parent;
        }
    }

    return text.impl();
}
Ejemplo n.º 4
0
void LayoutCounter::layoutObjectStyleChanged(LayoutObject& layoutObject, const ComputedStyle* oldStyle, const ComputedStyle& newStyle)
{
    Node* node = layoutObject.generatingNode();
    if (!node || node->needsAttach())
        return; // cannot have generated content or if it can have, it will be handled during attaching
    const CounterDirectiveMap* oldCounterDirectives = oldStyle ? oldStyle->counterDirectives() : 0;
    const CounterDirectiveMap* newCounterDirectives = newStyle.counterDirectives();
    if (oldCounterDirectives) {
        if (newCounterDirectives) {
            CounterDirectiveMap::const_iterator newMapEnd = newCounterDirectives->end();
            CounterDirectiveMap::const_iterator oldMapEnd = oldCounterDirectives->end();
            for (CounterDirectiveMap::const_iterator it = newCounterDirectives->begin(); it != newMapEnd; ++it) {
                CounterDirectiveMap::const_iterator oldMapIt = oldCounterDirectives->find(it->key);
                if (oldMapIt != oldMapEnd) {
                    if (oldMapIt->value == it->value)
                        continue;
                    LayoutCounter::destroyCounterNode(layoutObject, it->key);
                }
                // We must create this node here, because the changed node may be a node with no display such as
                // as those created by the increment or reset directives and the re-layout that will happen will
                // not catch the change if the node had no children.
                makeCounterNode(layoutObject, it->key, false);
            }
            // Destroying old counters that do not exist in the new counterDirective map.
            for (CounterDirectiveMap::const_iterator it = oldCounterDirectives->begin(); it !=oldMapEnd; ++it) {
                if (!newCounterDirectives->contains(it->key))
                    LayoutCounter::destroyCounterNode(layoutObject, it->key);
            }
        } else {
            if (layoutObject.hasCounterNodeMap())
                LayoutCounter::destroyCounterNodes(layoutObject);
        }
    } else if (newCounterDirectives) {
        if (layoutObject.hasCounterNodeMap())
            LayoutCounter::destroyCounterNodes(layoutObject);
        CounterDirectiveMap::const_iterator newMapEnd = newCounterDirectives->end();
        for (CounterDirectiveMap::const_iterator it = newCounterDirectives->begin(); it != newMapEnd; ++it) {
            // We must create this node here, because the added node may be a node with no display such as
            // as those created by the increment or reset directives and the re-layout that will happen will
            // not catch the change if the node had no children.
            makeCounterNode(layoutObject, it->key, false);
        }
    }
}
Ejemplo n.º 5
0
void RenderCounter::rendererStyleChanged(RenderObject* renderer, const RenderStyle* oldStyle, const RenderStyle* newStyle)
{
    Node* node = renderer->generatingNode();
    if (!node || !node->attached())
        return; // cannot have generated content or if it can have, it will be handled during attaching
    const CounterDirectiveMap* newCounterDirectives;
    const CounterDirectiveMap* oldCounterDirectives;
    if (oldStyle && (oldCounterDirectives = oldStyle->counterDirectives())) {
        if (newStyle && (newCounterDirectives = newStyle->counterDirectives())) {
            CounterDirectiveMap::const_iterator newMapEnd = newCounterDirectives->end();
            CounterDirectiveMap::const_iterator oldMapEnd = oldCounterDirectives->end();
            for (CounterDirectiveMap::const_iterator it = newCounterDirectives->begin(); it != newMapEnd; ++it) {
                CounterDirectiveMap::const_iterator oldMapIt = oldCounterDirectives->find(it->first);
                if (oldMapIt != oldMapEnd) {
                    if (oldMapIt->second == it->second)
                        continue;
                    RenderCounter::destroyCounterNode(renderer, it->first.get());
                }
                // We must create this node here, because the changed node may be a node with no display such as
                // as those created by the increment or reset directives and the re-layout that will happen will
                // not catch the change if the node had no children.
                makeCounterNode(renderer, it->first.get(), false);
            }
            // Destroying old counters that do not exist in the new counterDirective map.
            for (CounterDirectiveMap::const_iterator it = oldCounterDirectives->begin(); it !=oldMapEnd; ++it) {
                if (!newCounterDirectives->contains(it->first))
                    RenderCounter::destroyCounterNode(renderer, it->first.get());
            }
        } else {
            if (renderer->hasCounterNodeMap())
                RenderCounter::destroyCounterNodes(renderer);
        }
    } else if (newStyle && (newCounterDirectives = newStyle->counterDirectives())) {
        CounterDirectiveMap::const_iterator newMapEnd = newCounterDirectives->end();
        for (CounterDirectiveMap::const_iterator it = newCounterDirectives->begin(); it != newMapEnd; ++it) {
            // We must create this node here, because the added node may be a node with no display such as
            // as those created by the increment or reset directives and the re-layout that will happen will
            // not catch the change if the node had no children.
            makeCounterNode(renderer, it->first.get(), false);
        }
    }
}
Ejemplo n.º 6
0
static bool findPlaceForCounter(RenderObject* counterOwner, const AtomicString& identifier, bool isReset, RefPtr<CounterNode>& parent, RefPtr<CounterNode>& previousSibling)
{
    // We cannot stop searching for counters with the same identifier before we also
    // check this renderer, because it may affect the positioning in the tree of our counter.
    RenderObject* searchEndRenderer = previousSiblingOrParent(counterOwner);
    // We check renderers in preOrder from the renderer that our counter is attached to
    // towards the begining of the document for counters with the same identifier as the one
    // we are trying to find a place for. This is the next renderer to be checked.
    RenderObject* currentRenderer = previousInPreOrder(counterOwner);
    previousSibling = 0;
    RefPtr<CounterNode> previousSiblingProtector = 0;

    while (currentRenderer) {
        CounterNode* currentCounter = makeCounterNode(currentRenderer, identifier, false);
        if (searchEndRenderer == currentRenderer) {
            // We may be at the end of our search.
            if (currentCounter) {
                // We have a suitable counter on the EndSearchRenderer.
                if (previousSiblingProtector) { // But we already found another counter that we come after.
                    if (currentCounter->actsAsReset()) {
                        // We found a reset counter that is on a renderer that is a sibling of ours or a parent.
                        if (isReset && areRenderersElementsSiblings(currentRenderer, counterOwner)) {
                            // We are also a reset counter and the previous reset was on a sibling renderer
                            // hence we are the next sibling of that counter if that reset is not a root or
                            // we are a root node if that reset is a root.
                            parent = currentCounter->parent();
                            previousSibling = parent ? currentCounter : 0;
                            return parent;
                        }
                        // We are not a reset node or the previous reset must be on an ancestor of our owner renderer
                        // hence we must be a child of that reset counter.
                        parent = currentCounter;
                        // In some cases renders can be reparented (ex. nodes inside a table but not in a column or row).
                        // In these cases the identified previousSibling will be invalid as its parent is different from
                        // our identified parent.
                        if (previousSiblingProtector->parent() != currentCounter)
                            previousSiblingProtector = 0;

                        previousSibling = previousSiblingProtector.get();
                        return true;
                    }
                    // CurrentCounter, the counter at the EndSearchRenderer, is not reset.
                    if (!isReset || !areRenderersElementsSiblings(currentRenderer, counterOwner)) {
                        // If the node we are placing is not reset or we have found a counter that is attached
                        // to an ancestor of the placed counter's owner renderer we know we are a sibling of that node.
                        if (currentCounter->parent() != previousSiblingProtector->parent())
                            return false;

                        parent = currentCounter->parent();
                        previousSibling = previousSiblingProtector.get();
                        return true;
                    }
                } else { 
                    // We are at the potential end of the search, but we had no previous sibling candidate
                    // In this case we follow pretty much the same logic as above but no ASSERTs about 
                    // previousSibling, and when we are a sibling of the end counter we must set previousSibling
                    // to currentCounter.
                    if (currentCounter->actsAsReset()) {
                        if (isReset && areRenderersElementsSiblings(currentRenderer, counterOwner)) {
                            parent = currentCounter->parent();
                            previousSibling = currentCounter;
                            return parent;
                        }
                        parent = currentCounter;
                        previousSibling = previousSiblingProtector.get();
                        return true;
                    }
                    if (!isReset || !areRenderersElementsSiblings(currentRenderer, counterOwner)) {
                        parent = currentCounter->parent();
                        previousSibling = currentCounter;
                        return true;
                    }
                    previousSiblingProtector = currentCounter;
                }
            }
            // We come here if the previous sibling or parent of our owner renderer had no
            // good counter, or we are a reset node and the counter on the previous sibling
            // of our owner renderer was not a reset counter.
            // Set a new goal for the end of the search.
            searchEndRenderer = previousSiblingOrParent(currentRenderer);
        } else {
            // We are searching descendants of a previous sibling of the renderer that the
            // counter being placed is attached to.
            if (currentCounter) {
                // We found a suitable counter.
                if (previousSiblingProtector) {
                    // Since we had a suitable previous counter before, we should only consider this one as our 
                    // previousSibling if it is a reset counter and hence the current previousSibling is its child.
                    if (currentCounter->actsAsReset()) {
                        previousSiblingProtector = currentCounter;
                        // We are no longer interested in previous siblings of the currentRenderer or their children
                        // as counters they may have attached cannot be the previous sibling of the counter we are placing.
                        currentRenderer = parentElement(currentRenderer)->renderer();
                        continue;
                    }
                } else
                    previousSiblingProtector = currentCounter;
                currentRenderer = previousSiblingOrParent(currentRenderer);
                continue;
            }
        }
        // This function is designed so that the same test is not done twice in an iteration, except for this one
        // which may be done twice in some cases. Rearranging the decision points though, to accommodate this 
        // performance improvement would create more code duplication than is worthwhile in my oppinion and may further
        // impede the readability of this already complex algorithm.
        if (previousSiblingProtector)
            currentRenderer = previousSiblingOrParent(currentRenderer);
        else
            currentRenderer = previousInPreOrder(currentRenderer);
    }
    return false;
}