| /* |
| * Copyright (C) 2006, 2007, 2013 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 "Document.h" |
| #include "Editor.h" |
| #include "EditorClient.h" |
| #include "Element.h" |
| #include "ElementTraversal.h" |
| #include "Event.h" |
| #include "EventHandler.h" |
| #include "EventNames.h" |
| #include "ExceptionCode.h" |
| #include "FrameSelection.h" |
| #include "FrameTree.h" |
| #include "FrameView.h" |
| #include "HTMLAreaElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLInputElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLTextAreaElement.h" |
| #include "HitTestResult.h" |
| #include "KeyboardEvent.h" |
| #include "MainFrame.h" |
| #include "NodeRenderingTraversal.h" |
| #include "Page.h" |
| #include "Range.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> |
| #include <wtf/Ref.h> |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| FocusNavigationScope::FocusNavigationScope(TreeScope* treeScope) |
| : m_rootTreeScope(treeScope) |
| { |
| ASSERT(treeScope); |
| } |
| |
| ContainerNode* FocusNavigationScope::rootNode() const |
| { |
| return m_rootTreeScope->rootNode(); |
| } |
| |
| Element* FocusNavigationScope::owner() const |
| { |
| ContainerNode* root = rootNode(); |
| if (root->isShadowRoot()) |
| return toShadowRoot(root)->hostElement(); |
| if (Frame* frame = root->document().frame()) |
| return frame->ownerElement(); |
| return 0; |
| } |
| |
| FocusNavigationScope FocusNavigationScope::focusNavigationScopeOf(Node* node) |
| { |
| ASSERT(node); |
| Node* root = node; |
| for (Node* n = node; n; n = NodeRenderingTraversal::parentInScope(n)) |
| root = n; |
| // 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(node); |
| ASSERT(toElement(node)->shadowRoot()); |
| return FocusNavigationScope(toElement(node)->shadowRoot()); |
| } |
| |
| FocusNavigationScope FocusNavigationScope::focusNavigationScopeOwnedByIFrame(HTMLFrameOwnerElement* frame) |
| { |
| ASSERT(frame); |
| ASSERT(frame->contentFrame()); |
| return FocusNavigationScope(frame->contentFrame()->document()); |
| } |
| |
| static inline void dispatchEventsOnWindowAndFocusedElement(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->focusedElement()) |
| document->focusedElement()->dispatchBlurEvent(0); |
| document->dispatchWindowEvent(Event::create(focused ? eventNames().focusEvent : eventNames().blurEvent, false, false)); |
| if (focused && document->focusedElement()) |
| document->focusedElement()->dispatchFocusEvent(0, FocusDirectionNone); |
| } |
| |
| static inline bool hasCustomFocusLogic(Element& element) |
| { |
| return element.isHTMLElement() && toHTMLElement(element).hasCustomFocusLogic(); |
| } |
| |
| static inline bool isNonFocusableShadowHost(Element& element, KeyboardEvent& event) |
| { |
| return !element.isKeyboardFocusable(&event) && element.shadowRoot() && !hasCustomFocusLogic(element); |
| } |
| |
| static inline bool isFocusableShadowHost(Node& node, KeyboardEvent& event) |
| { |
| return node.isElementNode() && toElement(node).isKeyboardFocusable(&event) && toElement(node).shadowRoot() && !hasCustomFocusLogic(toElement(node)); |
| } |
| |
| static inline int adjustedTabIndex(Node& node, KeyboardEvent& event) |
| { |
| if (!node.isElementNode()) |
| return 0; |
| return isNonFocusableShadowHost(toElement(node), event) ? 0 : toElement(node).tabIndex(); |
| } |
| |
| static inline bool shouldVisit(Element& element, KeyboardEvent& event) |
| { |
| return element.isKeyboardFocusable(&event) || isNonFocusableShadowHost(element, event); |
| } |
| |
| FocusController::FocusController(Page& page) |
| : m_page(page) |
| , m_isActive(false) |
| , m_isFocused(false) |
| , m_isChangingFocusedFrame(false) |
| , m_containingWindowIsVisible(false) |
| { |
| } |
| |
| 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); |
| dispatchEventsOnWindowAndFocusedElement(m_focusedFrame->document(), focused); |
| } |
| } |
| |
| Element* FocusController::findFocusableElementDescendingDownIntoFrameDocument(FocusDirection direction, Element* element, 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 (element && element->isFrameOwnerElement()) { |
| HTMLFrameOwnerElement& owner = toHTMLFrameOwnerElement(*element); |
| if (!owner.contentFrame()) |
| break; |
| Element* foundElement = findFocusableElement(direction, FocusNavigationScope::focusNavigationScopeOwnedByIFrame(&owner), 0, event); |
| if (!foundElement) |
| break; |
| ASSERT(element != foundElement); |
| element = foundElement; |
| } |
| return element; |
| } |
| |
| 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* cache = focusedOrMainFrame().document()->existingAXObjectCache()) |
| cache->postNotification(focusedOrMainFrame().document(), AXObjectCache::AXFocusedUIElementChanged); |
| |
| 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(); |
| Document* document = frame.document(); |
| |
| Node* currentNode = document->focusedElement(); |
| // FIXME: Not quite correct when it comes to focus transitions leaving/entering the WebView itself |
| bool caretBrowsing = frame.settings().caretBrowsingEnabled(); |
| |
| if (caretBrowsing && !currentNode) |
| currentNode = frame.selection().start().deprecatedNode(); |
| |
| document->updateLayoutIgnorePendingStylesheets(); |
| |
| RefPtr<Element> element = findFocusableElementAcrossFocusScope(direction, FocusNavigationScope::focusNavigationScopeOf(currentNode ? currentNode : document), currentNode, event); |
| |
| if (!element) { |
| // 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->setFocusedElement(0); |
| setFocusedFrame(0); |
| m_page.chrome().takeFocus(direction); |
| return true; |
| } |
| |
| // Chrome doesn't want focus, so we should wrap focus. |
| element = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOf(m_page.mainFrame().document()), 0, event); |
| element = findFocusableElementDescendingDownIntoFrameDocument(direction, element.get(), event); |
| |
| if (!element) |
| return false; |
| } |
| |
| ASSERT(element); |
| |
| if (element == document->focusedElement()) { |
| // Focus wrapped around to the same element. |
| return true; |
| } |
| |
| if (element->isFrameOwnerElement() && (!element->isPluginElement() || !element->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 = toHTMLFrameOwnerElement(*element); |
| if (!owner.contentFrame()) |
| return false; |
| |
| document->setFocusedElement(nullptr); |
| setFocusedFrame(owner.contentFrame()); |
| return true; |
| } |
| |
| // FIXME: It would be nice to just be able to call setFocusedElement(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 = element->document(); |
| |
| if (&newDocument != document) { |
| // Focus is going away from this document, so clear the focused node. |
| document->setFocusedElement(nullptr); |
| } |
| |
| setFocusedFrame(newDocument.frame()); |
| |
| if (caretBrowsing) { |
| Position position = firstPositionInOrBeforeNode(element.get()); |
| VisibleSelection newSelection(position, position, DOWNSTREAM); |
| if (frame.selection().shouldChangeSelection(newSelection)) |
| frame.selection().setSelection(newSelection); |
| } |
| |
| element->focus(false, direction); |
| return true; |
| } |
| |
| Element* FocusController::findFocusableElementAcrossFocusScope(FocusDirection direction, FocusNavigationScope scope, Node* currentNode, KeyboardEvent* event) |
| { |
| ASSERT(!currentNode || !currentNode->isElementNode() || !isNonFocusableShadowHost(*toElement(currentNode), *event)); |
| Element* found; |
| if (currentNode && direction == FocusDirectionForward && isFocusableShadowHost(*currentNode, *event)) { |
| Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(currentNode), 0, event); |
| found = foundInInnerFocusScope ? foundInInnerFocusScope : findFocusableElementRecursively(direction, scope, currentNode, event); |
| } else |
| found = findFocusableElementRecursively(direction, scope, currentNode, event); |
| |
| // If there's no focusable node to advance to, move up the focus scopes until we find one. |
| while (!found) { |
| Element* owner = scope.owner(); |
| if (!owner) |
| break; |
| scope = FocusNavigationScope::focusNavigationScopeOf(owner); |
| if (direction == FocusDirectionBackward && isFocusableShadowHost(*owner, *event)) { |
| found = owner; |
| break; |
| } |
| found = findFocusableElementRecursively(direction, scope, owner, event); |
| } |
| found = findFocusableElementDescendingDownIntoFrameDocument(direction, found, event); |
| return found; |
| } |
| |
| Element* FocusController::findFocusableElementRecursively(FocusDirection direction, FocusNavigationScope scope, Node* start, KeyboardEvent* event) |
| { |
| // Starting node is exclusive. |
| Element* found = findFocusableElement(direction, scope, start, event); |
| if (!found) |
| return nullptr; |
| if (direction == FocusDirectionForward) { |
| if (!isNonFocusableShadowHost(*found, *event)) |
| return found; |
| Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event); |
| return foundInInnerFocusScope ? foundInInnerFocusScope : findFocusableElementRecursively(direction, scope, found, event); |
| } |
| ASSERT(direction == FocusDirectionBackward); |
| if (isFocusableShadowHost(*found, *event)) { |
| Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event); |
| return foundInInnerFocusScope ? foundInInnerFocusScope : found; |
| } |
| if (isNonFocusableShadowHost(*found, *event)) { |
| Element* foundInInnerFocusScope = findFocusableElementRecursively(direction, FocusNavigationScope::focusNavigationScopeOwnedByShadowHost(found), 0, event); |
| return foundInInnerFocusScope ? foundInInnerFocusScope :findFocusableElementRecursively(direction, scope, found, event); |
| } |
| return found; |
| } |
| |
| Element* FocusController::findFocusableElement(FocusDirection direction, FocusNavigationScope scope, Node* node, KeyboardEvent* event) |
| { |
| return (direction == FocusDirectionForward) |
| ? nextFocusableElement(scope, node, event) |
| : previousFocusableElement(scope, node, event); |
| } |
| |
| Element* FocusController::findElementWithExactTabIndex(Node* start, int tabIndex, KeyboardEvent* event, FocusDirection direction) |
| { |
| // Search is inclusive of start |
| using namespace NodeRenderingTraversal; |
| for (Node* node = start; node; node = direction == FocusDirectionForward ? nextInScope(node) : previousInScope(node)) { |
| if (!node->isElementNode()) |
| continue; |
| Element& element = toElement(*node); |
| if (shouldVisit(element, *event) && adjustedTabIndex(element, *event) == tabIndex) |
| return &element; |
| } |
| return nullptr; |
| } |
| |
| static Element* nextElementWithGreaterTabIndex(Node* start, int tabIndex, KeyboardEvent& event) |
| { |
| // Search is inclusive of start |
| int winningTabIndex = std::numeric_limits<short>::max() + 1; |
| Element* winner = nullptr; |
| for (Node* node = start; node; node = NodeRenderingTraversal::nextInScope(node)) { |
| if (!node->isElementNode()) |
| continue; |
| Element& element = toElement(*node); |
| if (shouldVisit(element, event) && element.tabIndex() > tabIndex && element.tabIndex() < winningTabIndex) { |
| winner = &element; |
| winningTabIndex = element.tabIndex(); |
| } |
| } |
| |
| return winner; |
| } |
| |
| static Element* previousElementWithLowerTabIndex(Node* start, int tabIndex, KeyboardEvent& event) |
| { |
| // Search is inclusive of start |
| int winningTabIndex = 0; |
| Element* winner = nullptr; |
| for (Node* node = start; node; node = NodeRenderingTraversal::previousInScope(node)) { |
| if (!node->isElementNode()) |
| continue; |
| Element& element = toElement(*node); |
| int currentTabIndex = adjustedTabIndex(element, event); |
| if ((shouldVisit(element, event) || isNonFocusableShadowHost(element, event)) && currentTabIndex < tabIndex && currentTabIndex > winningTabIndex) { |
| winner = &element; |
| winningTabIndex = currentTabIndex; |
| } |
| } |
| return winner; |
| } |
| |
| Element* FocusController::nextFocusableElement(FocusNavigationScope scope, Node* start, KeyboardEvent* event) |
| { |
| using namespace NodeRenderingTraversal; |
| |
| 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 (Node* node = nextInScope(start); node; node = nextInScope(node)) { |
| if (!node->isElementNode()) |
| continue; |
| Element& element = toElement(*node); |
| if (shouldVisit(element, *event) && adjustedTabIndex(element, *event) >= 0) |
| return &element; |
| } |
| } |
| |
| // First try to find a node with the same tabindex as start that comes after start in the scope. |
| if (Element* winner = findElementWithExactTabIndex(nextInScope(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 Element 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 (Element* winner = nextElementWithGreaterTabIndex(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 findElementWithExactTabIndex(scope.rootNode(), 0, event, FocusDirectionForward); |
| } |
| |
| Element* FocusController::previousFocusableElement(FocusNavigationScope scope, Node* start, KeyboardEvent* event) |
| { |
| using namespace NodeRenderingTraversal; |
| |
| Node* last = nullptr; |
| for (Node* node = scope.rootNode(); node; node = lastChildInScope(node)) |
| last = node; |
| 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 = previousInScope(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 (Node* node = startingNode; node; node = previousInScope(node)) { |
| if (!node->isElementNode()) |
| continue; |
| Element& element = toElement(*node); |
| if (shouldVisit(element, *event) && adjustedTabIndex(element, *event) >= 0) |
| return &element; |
| } |
| } |
| |
| if (Element* winner = findElementWithExactTabIndex(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 previousElementWithLowerTabIndex(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& selection = oldFocusedFrame->selection(); |
| if (selection.isNone()) |
| return; |
| |
| bool caretBrowsing = oldFocusedFrame->settings().caretBrowsingEnabled(); |
| if (caretBrowsing) |
| return; |
| |
| Node* selectionStartNode = selection.selection().start().deprecatedNode(); |
| if (selectionStartNode == newFocusedNode || selectionStartNode->isDescendantOf(newFocusedNode) || selectionStartNode->deprecatedShadowAncestorNode() == 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 = selection.rootEditableElement(); |
| if (!root) |
| return; |
| |
| if (Node* shadowAncestorNode = root->deprecatedShadowAncestorNode()) { |
| if (!isHTMLInputElement(shadowAncestorNode) && !isHTMLTextAreaElement(shadowAncestorNode)) |
| return; |
| } |
| } |
| } |
| |
| selection.clear(); |
| } |
| |
| bool FocusController::setFocusedElement(Element* element, PassRefPtr<Frame> newFocusedFrame, FocusDirection direction) |
| { |
| RefPtr<Frame> oldFocusedFrame = focusedFrame(); |
| RefPtr<Document> oldDocument = oldFocusedFrame ? oldFocusedFrame->document() : 0; |
| |
| Element* oldFocusedElement = oldDocument ? oldDocument->focusedElement() : 0; |
| if (oldFocusedElement == element) |
| return true; |
| |
| // FIXME: Might want to disable this check for caretBrowsing |
| if (oldFocusedElement && oldFocusedElement->isRootEditableElement() && !relinquishesEditingFocus(oldFocusedElement)) |
| return false; |
| |
| m_page.editorClient()->willSetInputMethodState(); |
| |
| clearSelectionIfNeeded(oldFocusedFrame.get(), newFocusedFrame.get(), element); |
| |
| if (!element) { |
| if (oldDocument) |
| oldDocument->setFocusedElement(0); |
| m_page.editorClient()->setInputMethodState(false); |
| return true; |
| } |
| |
| Ref<Document> newDocument(element->document()); |
| |
| if (newDocument->focusedElement() == element) { |
| m_page.editorClient()->setInputMethodState(element->shouldUseInputMethod()); |
| return true; |
| } |
| |
| if (oldDocument && oldDocument != &newDocument.get()) |
| oldDocument->setFocusedElement(0); |
| |
| if (newFocusedFrame && !newFocusedFrame->page()) { |
| setFocusedFrame(0); |
| return false; |
| } |
| setFocusedFrame(newFocusedFrame); |
| |
| Ref<Element> protect(*element); |
| |
| bool successfullyFocused = newDocument->setFocusedElement(element, direction); |
| if (!successfullyFocused) |
| return false; |
| |
| if (newDocument->focusedElement() == element) |
| m_page.editorClient()->setInputMethodState(element->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()) |
| dispatchEventsOnWindowAndFocusedElement(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), HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::IgnoreClipping | HitTestRequest::DisallowShadowContent); |
| 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()->focusedElement() : 0; |
| |
| Element* element = ElementTraversal::firstWithin(container); |
| FocusCandidate current; |
| current.rect = startingRect; |
| current.focusableNode = focusedNode; |
| current.visibleNode = focusedNode; |
| |
| unsigned candidateCount = 0; |
| for (; element; element = (element->isFrameOwnerElement() || canScrollInDirection(element, direction)) |
| ? ElementTraversal::nextSkippingChildren(element, container) |
| : ElementTraversal::next(element, container)) { |
| if (element == focusedNode) |
| continue; |
| |
| if (!element->isKeyboardFocusable(event) && !element->isFrameOwnerElement() && !canScrollInDirection(element, direction)) |
| continue; |
| |
| FocusCandidate candidate = FocusCandidate(element, direction); |
| if (candidate.isNull()) |
| continue; |
| |
| if (!isValidCandidate(direction, current, candidate)) |
| continue; |
| |
| candidateCount++; |
| candidate.enclosingScrollableBox = container; |
| updateFocusCandidateIfNeeded(direction, current, candidate, closest); |
| } |
| |
| // The variable 'candidateCount' keeps track of the number of nodes traversed in a given container. |
| // If we have more than one container in a page then the total number of nodes traversed is equal to the sum of nodes traversed in each container. |
| if (focusedFrame() && focusedFrame()->document()) { |
| candidateCount += focusedFrame()->document()->page()->lastSpatialNavigationCandidateCount(); |
| focusedFrame()->document()->page()->setLastSpatialNavigationCandidateCount(candidateCount); |
| } |
| } |
| |
| bool FocusController::advanceFocusDirectionallyInContainer(Node* container, const LayoutRect& startingRect, FocusDirection direction, KeyboardEvent* event) |
| { |
| if (!container) |
| 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; |
| Element* focusedElement = focusedOrMainFrame().document()->focusedElement(); |
| if (focusedElement && !hasOffscreenRect(focusedElement)) |
| rect = nodeRectInAbsoluteCoordinates(focusedElement, 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; |
| Element* focusedElement = focusedOrMainFrame().document()->focusedElement(); |
| if (focusedElement && !hasOffscreenRect(focusedElement)) |
| startingRect = nodeRectInAbsoluteCoordinates(focusedElement, 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, direction); |
| return true; |
| } |
| |
| bool FocusController::advanceFocusDirectionally(FocusDirection direction, KeyboardEvent* event) |
| { |
| Document* focusedDocument = focusedOrMainFrame().document(); |
| if (!focusedDocument) |
| return false; |
| |
| Element* focusedElement = focusedDocument->focusedElement(); |
| Node* container = focusedDocument; |
| |
| if (container->isDocumentNode()) |
| toDocument(container)->updateLayoutIgnorePendingStylesheets(); |
| |
| // Figure out the starting rect. |
| LayoutRect startingRect; |
| if (focusedElement) { |
| if (!hasOffscreenRect(focusedElement)) { |
| container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, focusedElement); |
| startingRect = nodeRectInAbsoluteCoordinates(focusedElement, true /* ignore border */); |
| } else if (isHTMLAreaElement(focusedElement)) { |
| HTMLAreaElement* area = toHTMLAreaElement(focusedElement); |
| container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, area->imageElement()); |
| startingRect = virtualRectForAreaElementAndDirection(area, direction); |
| } |
| } |
| |
| if (focusedFrame() && focusedFrame()->document()) |
| focusedDocument->page()->setLastSpatialNavigationCandidateCount(0); |
| |
| bool consumed = false; |
| do { |
| consumed = advanceFocusDirectionallyInContainer(container, startingRect, direction, event); |
| startingRect = nodeRectInAbsoluteCoordinates(container, true /* ignore border */); |
| container = scrollableEnclosingBoxOrParentFrameForNodeInDirection(direction, container); |
| if (container && container->isDocumentNode()) |
| toDocument(container)->updateLayoutIgnorePendingStylesheets(); |
| } while (!consumed && container); |
| |
| return consumed; |
| } |
| |
| } // namespace WebCore |
