| /* |
| * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. |
| * Copyright (C) 2008 Nuanti Ltd. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "FocusController.h" |
| |
| #include "AXObjectCache.h" |
| #include "Chrome.h" |
| #include "ComposedShadowTreeWalker.h" |
| #include "Document.h" |
| #include "Editor.h" |
| #include "EditorClient.h" |
| #include "Element.h" |
| #include "ElementShadow.h" |
| #include "Event.h" |
| #include "EventHandler.h" |
| #include "EventNames.h" |
| #include "ExceptionCode.h" |
| #include "Frame.h" |
| #include "FrameSelection.h" |
| #include "FrameTree.h" |
| #include "FrameView.h" |
| #include "HTMLAreaElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLNames.h" |
| #include "HitTestResult.h" |
| #include "KeyboardEvent.h" |
| #include "Page.h" |
| #include "Range.h" |
| #include "RenderObject.h" |
| #include "RenderWidget.h" |
| #include "ScrollAnimator.h" |
| #include "Settings.h" |
| #include "ShadowRoot.h" |
| #include "SpatialNavigation.h" |
| #include "Widget.h" |
| #include "htmlediting.h" // For firstPositionInOrBeforeNode |
| #include <limits> |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| using namespace std; |
| |
| static inline ComposedShadowTreeWalker walkerFrom(const Node* node) |
| { |
| return ComposedShadowTreeWalker(node, ComposedShadowTreeWalker::DoNotCrossUpperBoundary); |
| } |
| |
| static inline ComposedShadowTreeWalker walkerFromNext(const Node* node) |
| { |
| ComposedShadowTreeWalker walker = ComposedShadowTreeWalker(node, ComposedShadowTreeWalker::DoNotCrossUpperBoundary); |
| walker.next(); |
| return walker; |
| } |
| |
| static inline ComposedShadowTreeWalker walkerFromPrevious(const Node* node) |
| { |
| ComposedShadowTreeWalker walker = ComposedShadowTreeWalker(node, ComposedShadowTreeWalker::DoNotCrossUpperBoundary); |
| walker.previous(); |
| return walker; |
| } |
| |
| static inline Node* nextNode(const Node* node) |
| { |
| return walkerFromNext(node).get(); |
| } |
| |
| static inline Node* previousNode(const Node* node) |
| { |
| return walkerFromPrevious(node).get(); |
| } |
| |
| FocusNavigationScope::FocusNavigationScope(TreeScope* treeScope) |
| : m_rootTreeScope(treeScope) |
| { |
| ASSERT(treeScope); |
| ASSERT(!treeScope->rootNode()->isShadowRoot() || toShadowRoot(treeScope->rootNode())->isYoungest()); |
| } |
| |
| Node* FocusNavigationScope::rootNode() const |
| { |
| return m_rootTreeScope->rootNode(); |
| } |
| |
| Element* FocusNavigationScope::owner() const |
| { |
| Node* root = rootNode(); |
| if (root->isShadowRoot()) |
| return toShadowRoot(root)->host(); |
| if (Frame* frame = root->document()->frame()) |
| return frame->ownerElement(); |
| return 0; |
| } |
| |
| FocusNavigationScope FocusNavigationScope::focusNavigationScopeOf(Node* node) |
| { |
| ASSERT(node); |
| ComposedShadowTreeWalker walker(node, ComposedShadowTreeWalker::DoNotCrossUpperBoundary); |
| Node* root = node; |
| while (walker.get()) { |
| root = walker.get(); |
| walker.parent(); |
| } |
| // The result is not always a ShadowRoot nor a DocumentNode since |
| // a starting node is in an orphaned tree in composed shadow tree. |
| return FocusNavigationScope(root->treeScope()); |
| } |
| |
| FocusNavigationScope FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(Node* node) |
| { |
| ASSERT(isShadowHost(node)); |
| return FocusNavigationScope(toElement(node)->shadow()->youngestShadowRoot()); |
| } |
| |
| FocusNavigationScope FocusNavigationScope::focusNavigationScopeOwnedByIFrame(HTMLFrameOwnerElement* frame) |
| { |
| ASSERT(frame && frame->contentFrame()); |
| return FocusNavigationScope(frame->contentFrame()->document()); |
| } |
| |
| static inline void dispatchEventsOnWindowAndFocusedNode(Document* document, bool focused) |
| { |
| // If we have a focused node we should dispatch blur on it before we blur the window. |
| // If we have a focused node we should dispatch focus on it after we focus the window. |
| // https://bugs.webkit.org/show_bug.cgi?id=27105 |
| |
| // Do not fire events while modal dialogs are up. See https://bugs.webkit.org/show_bug.cgi?id=33962 |
| if (Page* page = document->page()) { |
| if (page->defersLoading()) |
| return; |
| } |
| |
| if (!focused && document->focusedNode()) |
| document->focusedNode()->dispatchBlurEvent(0); |
| document->dispatchWindowEvent(Event::create(focused ? eventNames().focusEvent : eventNames().blurEvent, false, false)); |
| if (focused && document->focusedNode()) |
| document->focusedNode()->dispatchFocusEvent(0); |
| } |
| |
| static inline bool hasCustomFocusLogic(Node* node) |
| { |
| return node->isHTMLElement() && toHTMLElement(node)->hasCustomFocusLogic(); |
| } |
| |
| static inline bool isNonFocusableShadowHost(Node* node, KeyboardEvent* event) |
| { |
| ASSERT(node); |
| return !node->isKeyboardFocusable(event) && isShadowHost(node) && !hasCustomFocusLogic(node); |
| } |
| |
| static inline bool isFocusableShadowHost(Node* node, KeyboardEvent* event) |
| { |
| ASSERT(node); |
| return node->isKeyboardFocusable(event) && isShadowHost(node) && !hasCustomFocusLogic(node); |
| } |
| |
| static inline int adjustedTabIndex(Node* node, KeyboardEvent* event) |
| { |
| ASSERT(node); |
| return isNonFocusableShadowHost(node, event) ? 0 : node->tabIndex(); |
| } |
| |
| static inline bool shouldVisit(Node* node, KeyboardEvent* event) |
| { |
| ASSERT(node); |
| return node->isKeyboardFocusable(event) || isNonFocusableShadowHost(node, event); |
| } |
| |
| FocusController::FocusController(Page* page) |
| : m_page(page) |
| , m_isActive(false) |
| , m_isFocused(false) |
| , m_isChangingFocusedFrame(false) |
| , m_containingWindowIsVisible(false) |
| { |
| } |
| |
| PassOwnPtr<FocusController> FocusController::create(Page* page) |
| { |
| return adoptPtr(new FocusController(page)); |
| } |
| |
| void FocusController::setFocusedFrame(PassRefPtr<Frame> frame) |
| { |
| ASSERT(!frame || frame->page() == m_page); |
| if (m_focusedFrame == frame || m_isChangingFocusedFrame) |
| return; |
| |
| m_isChangingFocusedFrame = true; |
| |
| RefPtr<Frame> oldFrame = m_focusedFrame; |
| RefPtr<Frame> newFrame = frame; |
| |
| m_focusedFrame = newFrame; |
| |
| // Now that the frame is updated, fire events and update the selection focused states of both frames. |
| if (oldFrame && oldFrame->view()) { |
| oldFrame->selection()->setFocused(false); |
| oldFrame->document()->dispatchWindowEvent(Event::create(eventNames().blurEvent, false, false)); |
| } |
| |
| if (newFrame && newFrame->view() && isFocused()) { |
| newFrame->selection()->setFocused(true); |
| newFrame->document()->dispatchWindowEvent(Event::create(eventNames().focusEvent, false, false)); |
| } |
| |
| m_page->chrome()->focusedFrameChanged(newFrame.get()); |
| |
| m_isChangingFocusedFrame = false; |
| } |
| |
| Frame* FocusController::focusedOrMainFrame() const |
| { |
| if (Frame* frame = focusedFrame()) |
| return frame; |
| return m_page->mainFrame(); |
| } |
| |
| void FocusController::setFocused(bool focused) |
| { |
| if (isFocused() == focused) |
| return; |
| |
| m_isFocused = focused; |
| |
| if (!m_isFocused) |
| focusedOrMainFrame()->eventHandler()->stopAutoscrollTimer(); |
| |
| if (!m_focusedFrame) |
| setFocusedFrame(m_page->mainFrame()); |
| |
| if (m_focusedFrame->view()) { |
| m_focusedFrame->selection()->setFocused(focused); |
| dispatchEventsOnWindowAndFocusedNode(m_focusedFrame->document(), focused); |
| } |
| } |
| |
| Node* FocusController::findFocusableNodeDecendingDownIntoFrameDocument(FocusDirection direction, Node* node, KeyboardEvent* event) |
| { |
| // The node we found might be a HTMLFrameOwnerElement, so descend down the tree until we find either: |
| // 1) a focusable node, or |
| // 2) the deepest-nested HTMLFrameOwnerElement. |
| while (node && node->isFrameOwnerElement()) { |
| HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node); |
| if (!owner->contentFrame()) |
| break; |
| Node* foundNode = findFocusableNode(direction, FocusNavigationScope::focusNavigationScopeOwnedByIFrame(owner), 0, event); |
| if (!foundNode) |
| break; |
| ASSERT(node != foundNode); |
| node = foundNode; |
| } |
| return node; |
| } |
| |
| bool FocusController::setInitialFocus(FocusDirection direction, KeyboardEvent* event) |
| { |
| bool didAdvanceFocus = advanceFocus(direction, event, true); |
| |
| // If focus is being set initially, accessibility needs to be informed that system focus has moved |
| // into the web area again, even if focus did not change within WebCore. PostNotification is called instead |
| // of handleFocusedUIElementChanged, because this will send the notification even if the element is the same. |
| if (AXObjectCache::accessibilityEnabled()) |
| focusedOrMainFrame()->document()->axObjectCache()->postNotification(focusedOrMainFrame()->document(), AXObjectCache::AXFocusedUIElementChanged, true); |
| |
| return didAdvanceFocus; |
| } |
| |
| bool FocusController::advanceFocus(FocusDirection direction, KeyboardEvent* event, bool initialFocus) |
| { |
| switch (direction) { |
| case FocusDirectionForward: |
| case FocusDirectionBackward: |
| return advanceFocusInDocumentOrder(direction, event, initialFocus); |
| case FocusDirectionLeft: |
| case FocusDirectionRight: |
| case FocusDirectionUp: |
| case FocusDirectionDown: |
| return advanceFocusDirectionally(direction, event); |
| default: |
| ASSERT_NOT_REACHED(); |
| } |
| |
| return false; |
| } |
| |
| bool FocusController::advanceFocusInDocumentOrder(FocusDirection direction, KeyboardEvent* event, bool initialFocus) |
| { |
| Frame* frame = focusedOrMainFrame(); |
| ASSERT(frame); |
| Document* document = frame->document(); |
| |
| Node* currentNode = document->focusedNode(); |
| // FIXME: Not quite correct when it comes to focus transitions leaving/entering the WebView itself |
| bool caretBrowsing = frame->settings() && frame->settings()->caretBrowsingEnabled(); |
| |
| if (caretBrowsing && !currentNode) |
| currentNode = frame->selection()->start().deprecatedNode(); |
| |
| document->updateLayoutIgnorePendingStylesheets(); |
| |
| RefPtr<Node> node = findFocusableNodeAcrossFocusScope(direction, FocusNavigationScope::focusNavigationScopeOf(currentNode ? currentNode : document), currentNode, event); |
| |
| if (!node) { |
| // We didn't find a node to focus, so we should try to pass focus to Chrome. |
| if (!initialFocus && m_page->chrome()->canTakeFocus(direction)) { |
| document->setFocusedNode(0); |
| setFocusedFrame(0); |
| m_page->chrome()->takeFocus(direction); |
| return true; |
| } |
| |
| // Chrome doesn't want focus, so we should wrap focus. |
| node = findFocusableNodeRecursively(direction, FocusNavigationScope::focusNavigationScopeOf(m_page->mainFrame()->document()), 0, event); |
| node = findFocusableNodeDecendingDownIntoFrameDocument(direction, node.get(), event); |
| |
| if (!node) |
| return false; |
| } |
| |
| ASSERT(node); |
| |
| if (node == document->focusedNode()) |
| // Focus wrapped around to the same node. |
| return true; |
| |
| if (!node->isElementNode()) |
| // FIXME: May need a way to focus a document here. |
| return false; |
| |
| if (node->isFrameOwnerElement() && (!node->isPluginElement() || !node->isKeyboardFocusable(event))) { |
| // We focus frames rather than frame owners. |
| // FIXME: We should not focus frames that have no scrollbars, as focusing them isn't useful to the user. |
| HTMLFrameOwnerElement* owner = static_cast<HTMLFrameOwnerElement*>(node.get()); |
| if (!owner->contentFrame()) |
| return false; |
| |
| document->setFocusedNode(0); |
| setFocusedFrame(owner->contentFrame()); |
| return true; |
| } |
| |
| // FIXME: It would be nice to just be able to call setFocusedNode(node) here, but we can't do |
| // that because some elements (e.g. HTMLInputElement and HTMLTextAreaElement) do extra work in |
| // their focus() methods. |
| |
| Document* newDocument = node->document(); |
| |
| if (newDocument != document) |
| // Focus is going away from this document, so clear the focused node. |
| document->setFocusedNode(0); |
| |
| if (newDocument) |
| setFocusedFrame(newDocument->frame()); |
| |
| if (caretBrowsing) { |
| Position position = firstPositionInOrBeforeNode(node.get()); |
| VisibleSelection newSelection(position, position, DOWNSTREAM); |
| if (frame->selection()->shouldChangeSelection(newSelection)) |
| frame->selection()->setSelection(newSelection); |
| } |
| |
| static_cast<Element*>(node.get())->focus(false); |
| return true; |
| } |
| |
| Node* FocusController::findFocusableNodeAcrossFocusScope(FocusDirection direction, FocusNavigationScope scope, Node* currentNode, KeyboardEvent* event) |
| { |
| ASSERT(!currentNode || !isNonFocusableShadowHost(currentNode, event)); |
| Node* found; |
| if (currentNode && direction == FocusDirectionForward && isFocusableShadowHost(currentNode, event)) { |
| Node* foundInInnerFocusScope = findFocusableNodeRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(currentNode), 0, event); |
| found = foundInInnerFocusScope ? foundInInnerFocusScope : findFocusableNodeRecursively(direction, scope, currentNode, event); |
| } else |
| found = findFocusableNodeRecursively(direction, scope, currentNode, event); |
| |
| // If there's no focusable node to advance to, move up the focus scopes until we find one. |
| while (!found) { |
| Node* owner = scope.owner(); |
| if (!owner) |
| break; |
| scope = FocusNavigationScope::focusNavigationScopeOf(owner); |
| if (direction == FocusDirectionBackward && isFocusableShadowHost(owner, event)) { |
| found = owner; |
| break; |
| } |
| found = findFocusableNodeRecursively(direction, scope, owner, event); |
| } |
| found = findFocusableNodeDecendingDownIntoFrameDocument(direction, found, event); |
| return found; |
| } |
| |
| Node* FocusController::findFocusableNodeRecursively(FocusDirection direction, FocusNavigationScope scope, Node* start, KeyboardEvent* event) |
| { |
| // Starting node is exclusive. |
| Node* found = findFocusableNode(direction, scope, start, event); |
| if (!found) |
| return 0; |
| if (direction == FocusDirectionForward) { |
| if (!isNonFocusableShadowHost(found, event)) |
| return found; |
| Node* foundInInnerFocusScope = findFocusableNodeRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event); |
| return foundInInnerFocusScope ? foundInInnerFocusScope : findFocusableNodeRecursively(direction, scope, found, event); |
| } |
| ASSERT(direction == FocusDirectionBackward); |
| if (isFocusableShadowHost(found, event)) { |
| Node* foundInInnerFocusScope = findFocusableNodeRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event); |
| return foundInInnerFocusScope ? foundInInnerFocusScope : found; |
| } |
| if (isNonFocusableShadowHost(found, event)) { |
| Node* foundInInnerFocusScope = findFocusableNodeRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event); |
| return foundInInnerFocusScope ? foundInInnerFocusScope :findFocusableNodeRecursively(direction, scope, found, event); |
| } |
| return found; |
| } |
| |
| Node* FocusController::findFocusableNode(FocusDirection direction, FocusNavigationScope scope, Node* node, KeyboardEvent* event) |
| { |
| return (direction == FocusDirectionForward) |
| ? nextFocusableNode(scope, node, event) |
| : previousFocusableNode(scope, node, event); |
| } |
| |
| Node* FocusController::findNodeWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event, FocusDirection direction) |
| { |
| // Search is inclusive of start |
| for (ComposedShadowTreeWalker walker = walkerFrom(start); walker.get(); direction == FocusDirectionForward ? walker.next() : walker.previous()) { |
| if (shouldVisit(walker.get(), event) && adjustedTabIndex(walker.get(), event) == tabIndex) |
| return walker.get(); |
| } |
| return 0; |
| } |
| |
| static Node* nextNodeWithGreaterTabIndex(Node* start, int tabIndex, KeyboardEvent* event) |
| { |
| // Search is inclusive of start |
| int winningTabIndex = std::numeric_limits<short>::max() + 1; |
| Node* winner = 0; |
| for (ComposedShadowTreeWalker walker = walkerFrom(start); walker.get(); walker.next()) { |
| Node* node = walker.get(); |
| if (shouldVisit(node, event) && node->tabIndex() > tabIndex && node->tabIndex() < winningTabIndex) { |
| winner = node; |
| winningTabIndex = node->tabIndex(); |
| } |
| } |
| |
| return winner; |
| } |
| |
| static Node* previousNodeWithLowerTabIndex(Node* start, int tabIndex, KeyboardEvent* event) |
| { |
| // Search is inclusive of start |
| int winningTabIndex = 0; |
| Node* winner = 0; |
| for (ComposedShadowTreeWalker walker = walkerFrom(start); walker.get(); walker.previous()) { |
| Node* node = walker.get(); |
| int currentTabIndex = adjustedTabIndex(node, event); |
| if ((shouldVisit(node, event) || isNonFocusableShadowHost(node, event)) && currentTabIndex < tabIndex && currentTabIndex > winningTabIndex) { |
| winner = node; |
| winningTabIndex = currentTabIndex; |
| } |
| } |
| return winner; |
| } |
| |
| Node* FocusController::nextFocusableNode(FocusNavigationScope scope, Node* start, KeyboardEvent* event) |
| { |
| if (start) { |
| int tabIndex = adjustedTabIndex(start, event); |
| // If a node is excluded from the normal tabbing cycle, the next focusable node is determined by tree order |
| if (tabIndex < 0) { |
| for (ComposedShadowTreeWalker walker = walkerFromNext(start); walker.get(); walker.next()) { |
| if (shouldVisit(walker.get(), event) && adjustedTabIndex(walker.get(), event) >= 0) |
| return walker.get(); |
| } |
| } |
| |
| // First try to find a node with the same tabindex as start that comes after start in the scope. |
| if (Node* winner = findNodeWithExactTabIndex(nextNode(start), tabIndex, event, FocusDirectionForward)) |
| return winner; |
| |
| if (!tabIndex) |
| // We've reached the last node in the document with a tabindex of 0. This is the end of the tabbing order. |
| return 0; |
| } |
| |
| // Look for the first node in the scope that: |
| // 1) has the lowest tabindex that is higher than start's tabindex (or 0, if start is null), and |
| // 2) comes first in the scope, if there's a tie. |
| if (Node* winner = nextNodeWithGreaterTabIndex(scope.rootNode(), start ? adjustedTabIndex(start, event) : 0, event)) |
| return winner; |
| |
| // There are no nodes with a tabindex greater than start's tabindex, |
| // so find the first node with a tabindex of 0. |
| return findNodeWithExactTabIndex(scope.rootNode(), 0, event, FocusDirectionForward); |
| } |
| |
| Node* FocusController::previousFocusableNode(FocusNavigationScope scope, Node* start, KeyboardEvent* event) |
| { |
| Node* last = 0; |
| for (ComposedShadowTreeWalker walker = walkerFrom(scope.rootNode()); walker.get(); walker.lastChild()) |
| last = walker.get(); |
| ASSERT(last); |
| |
| // First try to find the last node in the scope that comes before start and has the same tabindex as start. |
| // If start is null, find the last node in the scope with a tabindex of 0. |
| Node* startingNode; |
| int startingTabIndex; |
| if (start) { |
| startingNode = previousNode(start); |
| startingTabIndex = adjustedTabIndex(start, event); |
| } else { |
| startingNode = last; |
| startingTabIndex = 0; |
| } |
| |
| // However, if a node is excluded from the normal tabbing cycle, the previous focusable node is determined by tree order |
| if (startingTabIndex < 0) { |
| for (ComposedShadowTreeWalker walker = walkerFrom(startingNode); walker.get(); walker.previous()) { |
| if (shouldVisit(walker.get(), event) && adjustedTabIndex(walker.get(), event) >= 0) |
| return walker.get(); |
| } |
| } |
| |
| if (Node* winner = findNodeWithExactTabIndex(startingNode, startingTabIndex, event, FocusDirectionBackward)) |
| return winner; |
| |
| // There are no nodes before start with the same tabindex as start, so look for a node that: |
| // 1) has the highest non-zero tabindex (that is less than start's tabindex), and |
| // 2) comes last in the scope, if there's a tie. |
| startingTabIndex = (start && startingTabIndex) ? startingTabIndex : std::numeric_limits<short>::max(); |
| return previousNodeWithLowerTabIndex(last, startingTabIndex, event); |
| } |
| |
| static bool relinquishesEditingFocus(Node *node) |
| { |
| ASSERT(node); |
| ASSERT(node->rendererIsEditable()); |
| |
| Node* root = node->rootEditableElement(); |
| Frame* frame = node->document()->frame(); |
| if (!frame || !root) |
| return false; |
| |
| return frame->editor()->shouldEndEditing(rangeOfContents(root).get()); |
| } |
| |
| static void clearSelectionIfNeeded(Frame* oldFocusedFrame, Frame* newFocusedFrame, Node* newFocusedNode) |
| { |
| if (!oldFocusedFrame || !newFocusedFrame) |
| return; |
| |
| if (oldFocusedFrame->document() != newFocusedFrame->document()) |
| return; |
| |
| FrameSelection* s = oldFocusedFrame->selection(); |
| if (s->isNone()) |
| return; |
| |
| bool caretBrowsing = oldFocusedFrame->settings()->caretBrowsingEnabled(); |
| if (caretBrowsing) |
| return; |
| |
| Node* selectionStartNode = s->selection().start().deprecatedNode(); |
| if (selectionStartNode == newFocusedNode || selectionStartNode->isDescendantOf(newFocusedNode) || selectionStartNode->shadowAncestorNode() == newFocusedNode) |
| return; |
| |
| if (Node* mousePressNode = newFocusedFrame->eventHandler()->mousePressNode()) { |
| if (mousePressNode->renderer() && !mousePressNode->canStartSelection()) { |
| // Don't clear the selection for contentEditable elements, but do clear it for input and textarea. See bug 38696. |
| Node * root = s->rootEditableElement(); |
| if (!root) |
| return; |
| |
| if (Node* shadowAncestorNode = root->shadowAncestorNode()) { |
| if (!shadowAncestorNode->hasTagName(inputTag) && !shadowAncestorNode->hasTagName(textareaTag)) |
| return; |
| } |
| } |
| } |
| |
| s->clear(); |
| } |
| |
| bool FocusController::setFocusedNode(Node* node, PassRefPtr<Frame> newFocusedFrame) |
| { |
| RefPtr<Frame> oldFocusedFrame = focusedFrame(); |
| RefPtr<Document> oldDocument = oldFocusedFrame ? oldFocusedFrame->document() : 0; |
| |
| Node* oldFocusedNode = oldDocument ? oldDocument->focusedNode() : 0; |
| if (oldFocusedNode == node) |
| return true; |
| |
| // FIXME: Might want to disable this check for caretBrowsing |
| if (oldFocusedNode && oldFocusedNode->isRootEditableElement() && !relinquishesEditingFocus(oldFocusedNode)) |
| return false; |
| |
| m_page->editorClient()->willSetInputMethodState(); |
| |
| clearSelectionIfNeeded(oldFocusedFrame.get(), newFocusedFrame.get(), node); |
| |
| if (!node) { |
| if (oldDocument) |
| oldDocument->setFocusedNode(0); |
| m_page->editorClient()->setInputMethodState(false); |
| return true; |
| } |
| |
| RefPtr<Document> newDocument = node->document(); |
| |
| if (newDocument && newDocument->focusedNode() == node) { |
| m_page->editorClient()->setInputMethodState(node->shouldUseInputMethod()); |
| return true; |
| } |
| |
| if (oldDocument && oldDocument != newDocument) |
| oldDocument->setFocusedNode(0); |
| |
| setFocusedFrame(newFocusedFrame); |
| |
| // Setting the focused node can result in losing our last reft to node when JS event handlers fire. |
| RefPtr<Node> protect = node; |
| if (newDocument) { |
| bool successfullyFocused = newDocument->setFocusedNode(node); |
| if (!successfullyFocused) |
| return false; |
| } |
| |
| if (newDocument->focusedNode() == node) |
| m_page->editorClient()->setInputMethodState(node->shouldUseInputMethod()); |
| |
| return true; |
| } |
| |
| void FocusController::setActive(bool active) |
| { |
| if (m_isActive == active) |
| return; |
| |
| m_isActive = active; |
| |
| if (FrameView* view = m_page->mainFrame()->view()) { |
| if (!view->platformWidget()) { |
| view->updateLayoutAndStyleIfNeededRecursive(); |
| view->updateControlTints(); |
| } |
| } |
| |
| focusedOrMainFrame()->selection()->pageActivationChanged(); |
| |
| if (m_focusedFrame && isFocused()) |
| dispatchEventsOnWindowAndFocusedNode(m_focusedFrame->document(), active); |
| } |
| |
| static void contentAreaDidShowOrHide(ScrollableArea* scrollableArea, bool didShow) |
| { |
| if (didShow) |
| scrollableArea->contentAreaDidShow(); |
| else |
| scrollableArea->contentAreaDidHide(); |
| } |
| |
| void FocusController::setContainingWindowIsVisible(bool containingWindowIsVisible) |
| { |
| if (m_containingWindowIsVisible == containingWindowIsVisible) |
| return; |
| |
| m_containingWindowIsVisible = containingWindowIsVisible; |
| |
| FrameView* view = m_page->mainFrame()->view(); |
| if (!view) |
| return; |
| |
| contentAreaDidShowOrHide(view, containingWindowIsVisible); |
| |
| for (Frame* frame = m_page->mainFrame(); frame; frame = frame->tree()->traverseNext()) { |
| FrameView* frameView = frame->view(); |
| if (!frameView) |
| continue; |
| |
| const HashSet<ScrollableArea*>* scrollableAreas = frameView->scrollableAreas(); |
| if (!scrollableAreas) |
| continue; |
| |
| for (HashSet<ScrollableArea*>::const_iterator it = scrollableAreas->begin(), end = scrollableAreas->end(); it != end; ++it) { |
| ScrollableArea* scrollableArea = *it; |
| ASSERT(scrollableArea->scrollbarsCanBeActive() || m_page->shouldSuppressScrollbarAnimations()); |
| |
| contentAreaDidShowOrHide(scrollableArea, containingWindowIsVisible); |
| } |
| } |
| } |
| |
| static void updateFocusCandidateIfNeeded(FocusDirection direction, const FocusCandidate& current, FocusCandidate& candidate, FocusCandidate& closest) |
| { |
| ASSERT(candidate.visibleNode->isElementNode()); |
| ASSERT(candidate.visibleNode->renderer()); |
| |
| // Ignore iframes that don't have a src attribute |
| if (frameOwnerElement(candidate) && (!frameOwnerElement(candidate)->contentFrame() || candidate.rect.isEmpty())) |
| return; |
| |
| // Ignore off screen child nodes of containers that do not scroll (overflow:hidden) |
| if (candidate.isOffscreen && !canBeScrolledIntoView(direction, candidate)) |
| return; |
| |
| distanceDataForNode(direction, current, candidate); |
| if (candidate.distance == maxDistance()) |
| return; |
| |
| if (candidate.isOffscreenAfterScrolling && candidate.alignment < Full) |
| return; |
| |
| if (closest.isNull()) { |
| closest = candidate; |
| return; |
| } |
| |
| LayoutRect intersectionRect = intersection(candidate.rect, closest.rect); |
| if (!intersectionRect.isEmpty() && !areElementsOnSameLine(closest, candidate)) { |
| // If 2 nodes are intersecting, do hit test to find which node in on top. |
| LayoutUnit x = intersectionRect.x() + intersectionRect.width() / 2; |
| LayoutUnit y = intersectionRect.y() + intersectionRect.height() / 2; |
| HitTestResult result = candidate.visibleNode->document()->page()->mainFrame()->eventHandler()->hitTestResultAtPoint(IntPoint(x, y), false, true); |
| if (candidate.visibleNode->contains(result.innerNode())) { |
| closest = candidate; |
| return; |
| } |
| if (closest.visibleNode->contains(result.innerNode())) |
| return; |
| } |
| |
| if (candidate.alignment == closest.alignment) { |
| if (candidate.distance < closest.distance) |
| closest = candidate; |
| return; |
| } |
| |
| if (candidate.alignment > closest.alignment) |
| closest = candidate; |
| } |
| |
| void FocusController::findFocusCandidateInContainer(Node* container, const LayoutRect& startingRect, FocusDirection direction, KeyboardEvent* event, FocusCandidate& closest) |
| { |
| ASSERT(container); |
| Node* focusedNode = (focusedFrame() && focusedFrame()->document()) ? focusedFrame()->document()->focusedNode() : 0; |
| |
| Node* node = container->firstChild(); |
| FocusCandidate current; |
| current.rect = startingRect; |
| current.focusableNode = focusedNode; |
| current.visibleNode = focusedNode; |
| |
| for (; node; node = (node->isFrameOwnerElement() || canScrollInDirection(node, direction)) ? node->traverseNextSibling(container) : node->traverseNextNode(container)) { |
| if (node == focusedNode) |
| continue; |
| |
| if (!node->isElementNode()) |
| continue; |
| |
| if (!node->isKeyboardFocusable(event) && !node->isFrameOwnerElement() && !canScrollInDirection(node, direction)) |
| continue; |
| |
| FocusCandidate candidate = FocusCandidate(node, direction); |
| if (candidate.isNull()) |
| continue; |
| |
| candidate.enclosingScrollableBox = container; |
| updateFocusCandidateIfNeeded(direction, current, candidate, closest); |
| } |
| } |
| |
| bool FocusController::advanceFocusDirectionallyInContainer(Node* container, const LayoutRect& startingRect, FocusDirection direction, KeyboardEvent* event) |
| { |
| if (!container || !container->document()) |
| return false; |
| |
| LayoutRect newStartingRect = startingRect; |
| |
| if (startingRect.isEmpty()) |
| newStartingRect = virtualRectForDirection(direction, nodeRectInAbsoluteCoordinates(container)); |
| |
| // Find the closest node within current container in the direction of the navigation. |
| FocusCandidate focusCandidate; |
| findFocusCandidateInContainer(container, newStartingRect, direction, event, focusCandidate); |
| |
| if (focusCandidate.isNull()) { |
| // Nothing to focus, scroll if possible. |
| // NOTE: If no scrolling is performed (i.e. scrollInDirection returns false), the |
| // spatial navigation algorithm will skip this container. |
| return scrollInDirection(container, direction); |
| } |
| |
| if (HTMLFrameOwnerElement* frameElement = frameOwnerElement(focusCandidate)) { |
| // If we have an iframe without the src attribute, it will not have a contentFrame(). |
| // We ASSERT here to make sure that |
| // updateFocusCandidateIfNeeded() will never consider such an iframe as a candidate. |
| ASSERT(frameElement->contentFrame()); |
| |
| if (focusCandidate.isOffscreenAfterScrolling) { |
| scrollInDirection(focusCandidate.visibleNode->document(), direction); |
| return true; |
| } |
| // Navigate into a new frame. |
| LayoutRect rect; |
| Node* focusedNode = focusedOrMainFrame()->document()->focusedNode(); |
| if (focusedNode && !hasOffscreenRect(focusedNode)) |
| rect = nodeRectInAbsoluteCoordinates(focusedNode, true /* ignore border */); |
| frameElement->contentFrame()->document()->updateLayoutIgnorePendingStylesheets(); |
| if (!advanceFocusDirectionallyInContainer(frameElement->contentFrame()->document(), rect, direction, event)) { |
| // The new frame had nothing interesting, need to find another candidate. |
| return advanceFocusDirectionallyInContainer(container, nodeRectInAbsoluteCoordinates(focusCandidate.visibleNode, true), direction, event); |
| } |
| return true; |
| } |
| |
| if (canScrollInDirection(focusCandidate.visibleNode, direction)) { |
| if (focusCandidate.isOffscreenAfterScrolling) { |
| scrollInDirection(focusCandidate.visibleNode, direction); |
| return true; |
| } |
| // Navigate into a new scrollable container. |
| LayoutRect startingRect; |
| Node* focusedNode = focusedOrMainFrame()->document()->focusedNode(); |
| if (focusedNode && !hasOffscreenRect(focusedNode)) |
| startingRect = nodeRectInAbsoluteCoordinates(focusedNode, true); |
| return advanceFocusDirectionallyInContainer(focusCandidate.visibleNode, startingRect, direction, event); |
| } |
| if (focusCandidate.isOffscreenAfterScrolling) { |
| Node* container = focusCandidate.enclosingScrollableBox; |
| scrollInDirection(container, direction); |
| return true; |
| } |
| |
| // We found a new focus node, navigate to it. |
| Element* element = toElement(focusCandidate.focusableNode); |
| ASSERT(element); |
| |
| element->focus(false); |
| return true; |
| } |
| |
| bool FocusController::advanceFocusDirectionally(FocusDirection direction, KeyboardEvent* event) |
| { |
| Frame* curFrame = focusedOrMainFrame(); |
| ASSERT(curFrame); |
| |
| Document* focusedDocument = curFrame->document(); |
| if (!focusedDocument) |
| return false; |
| |
| Node* focusedNode = focusedDocument->focusedNode(); |
| Node* container = focusedDocument; |
| |
| if (container->isDocumentNode()) |
| static_cast<Document*>(container)->updateLayoutIgnorePendingStylesheets(); |
| |
| // Figure out the starting rect. |
| LayoutRect startingRect; |
| if (focusedNode) { |
| if (!hasOffscreenRect(focusedNode)) { |
| container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, focusedNode); |
| startingRect = nodeRectInAbsoluteCoordinates(focusedNode, true /* ignore border */); |
| } else if (focusedNode->hasTagName(areaTag)) { |
| HTMLAreaElement* area = static_cast<HTMLAreaElement*>(focusedNode); |
| container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, area->imageElement()); |
| startingRect = virtualRectForAreaElementAndDirection(area, direction); |
| } |
| } |
| |
| bool consumed = false; |
| do { |
| consumed = advanceFocusDirectionallyInContainer(container, startingRect, direction, event); |
| startingRect = nodeRectInAbsoluteCoordinates(container, true /* ignore border */); |
| container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, container); |
| if (container && container->isDocumentNode()) |
| static_cast<Document*>(container)->updateLayoutIgnorePendingStylesheets(); |
| } while (!consumed && container); |
| |
| return consumed; |
| } |
| |
| } // namespace WebCore |
