331 lines
12 KiB
C++
331 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsComboboxControlFrame_h___
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#define nsComboboxControlFrame_h___
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#ifdef DEBUG_evaughan
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//#define DEBUG_rods
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#endif
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#ifdef DEBUG_rods
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//#define DO_REFLOW_DEBUG
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//#define DO_REFLOW_COUNTER
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//#define DO_UNCONSTRAINED_CHECK
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//#define DO_PIXELS
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//#define DO_NEW_REFLOW
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#endif
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//Mark used to indicate when onchange has been fired for current combobox item
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#define NS_SKIP_NOTIFY_INDEX -2
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#include "mozilla/Attributes.h"
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#include "nsBlockFrame.h"
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#include "nsIFormControlFrame.h"
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#include "nsIComboboxControlFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsISelectControlFrame.h"
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#include "nsIRollupListener.h"
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#include "nsIStatefulFrame.h"
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#include "nsThreadUtils.h"
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class nsStyleContext;
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class nsIListControlFrame;
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class nsComboboxDisplayFrame;
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class nsIDOMEventListener;
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class nsIScrollableFrame;
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namespace mozilla {
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namespace gfx {
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class DrawTarget;
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} // namespace gfx
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} // namespace mozilla
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class nsComboboxControlFrame final : public nsBlockFrame,
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public nsIFormControlFrame,
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public nsIComboboxControlFrame,
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public nsIAnonymousContentCreator,
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public nsISelectControlFrame,
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public nsIRollupListener,
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public nsIStatefulFrame
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{
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typedef mozilla::gfx::DrawTarget DrawTarget;
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public:
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NS_DECL_QUERYFRAME_TARGET(nsComboboxControlFrame)
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friend nsComboboxControlFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext,
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nsFrameState aFlags);
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friend class nsComboboxDisplayFrame;
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explicit nsComboboxControlFrame(nsStyleContext* aContext);
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~nsComboboxControlFrame();
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIAnonymousContentCreator
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virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
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virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter) override;
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nsIContent* GetDisplayNode() { return mDisplayContent; }
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nsIFrame* CreateFrameForDisplayNode();
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() override;
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#endif
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virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
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virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
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virtual void Reflow(nsPresContext* aCX,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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void PaintFocus(DrawTarget& aDrawTarget, nsPoint aPt);
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// XXXbz this is only needed to prevent the quirk percent height stuff from
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// leaking out of the combobox. We may be able to get rid of this as more
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// things move to IsFrameOfType.
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virtual nsIAtom* GetType() const override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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return nsBlockFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
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}
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virtual nsIScrollableFrame* GetScrollTargetFrame() override {
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return do_QueryFrame(mDropdownFrame);
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}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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virtual const nsFrameList& GetChildList(ChildListID aListID) const override;
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virtual void GetChildLists(nsTArray<ChildList>* aLists) const override;
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virtual nsContainerFrame* GetContentInsertionFrame() override;
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// nsIFormControlFrame
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virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue) override;
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/**
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* Inform the control that it got (or lost) focus.
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* If it lost focus, the dropdown menu will be rolled up if needed,
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* and FireOnChange() will be called.
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* @param aOn true if got focus, false if lost focus.
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* @param aRepaint if true then force repaint (NOTE: we always force repaint currently)
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* @note This method might destroy |this|.
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*/
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virtual void SetFocus(bool aOn, bool aRepaint) override;
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//nsIComboboxControlFrame
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virtual bool IsDroppedDown() override { return mDroppedDown; }
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/**
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* @note This method might destroy |this|.
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*/
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virtual void ShowDropDown(bool aDoDropDown) override;
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virtual nsIFrame* GetDropDown() override;
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virtual void SetDropDown(nsIFrame* aDropDownFrame) override;
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/**
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* @note This method might destroy |this|.
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*/
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virtual void RollupFromList() override;
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/**
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* Return the available space before and after this frame for
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* placing the drop-down list, and the current 2D translation.
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* Note that either or both can be less than or equal to zero,
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* if both are then the drop-down should be closed.
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*/
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void GetAvailableDropdownSpace(mozilla::WritingMode aWM,
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nscoord* aBefore,
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nscoord* aAfter,
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mozilla::LogicalPoint* aTranslation);
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virtual int32_t GetIndexOfDisplayArea() override;
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/**
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* @note This method might destroy |this|.
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*/
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NS_IMETHOD RedisplaySelectedText() override;
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virtual int32_t UpdateRecentIndex(int32_t aIndex) override;
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virtual void OnContentReset() override;
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bool IsOpenInParentProcess() override
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{
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return mIsOpenInParentProcess;
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}
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void SetOpenInParentProcess(bool aVal) override
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{
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mIsOpenInParentProcess = aVal;
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}
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// nsISelectControlFrame
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NS_IMETHOD AddOption(int32_t index) override;
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NS_IMETHOD RemoveOption(int32_t index) override;
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NS_IMETHOD DoneAddingChildren(bool aIsDone) override;
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NS_IMETHOD OnOptionSelected(int32_t aIndex, bool aSelected) override;
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NS_IMETHOD OnSetSelectedIndex(int32_t aOldIndex, int32_t aNewIndex) override;
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//nsIRollupListener
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/**
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* Hide the dropdown menu and stop capturing mouse events.
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* @note This method might destroy |this|.
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*/
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virtual bool Rollup(uint32_t aCount, bool aFlush,
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const nsIntPoint* pos, nsIContent** aLastRolledUp) override;
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virtual void NotifyGeometryChange() override;
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/**
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* A combobox should roll up if a mousewheel event happens outside of
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* the popup area.
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*/
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virtual bool ShouldRollupOnMouseWheelEvent() override
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{ return true; }
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virtual bool ShouldConsumeOnMouseWheelEvent() override
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{ return false; }
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/**
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* A combobox should not roll up if activated by a mouse activate message
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* (eg. X-mouse).
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*/
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virtual bool ShouldRollupOnMouseActivate() override
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{ return false; }
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virtual uint32_t GetSubmenuWidgetChain(nsTArray<nsIWidget*> *aWidgetChain) override
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{ return 0; }
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virtual nsIWidget* GetRollupWidget() override;
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//nsIStatefulFrame
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NS_IMETHOD SaveState(nsPresState** aState) override;
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NS_IMETHOD RestoreState(nsPresState* aState) override;
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NS_IMETHOD GenerateStateKey(nsIContent* aContent,
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nsIDocument* aDocument,
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nsACString& aKey) override;
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static bool ToolkitHasNativePopup();
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protected:
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friend class RedisplayTextEvent;
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friend class nsAsyncResize;
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friend class nsResizeDropdownAtFinalPosition;
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// Utilities
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void ReflowDropdown(nsPresContext* aPresContext,
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const ReflowInput& aReflowInput);
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enum DropDownPositionState {
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// can't show the dropdown at its current position
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eDropDownPositionSuppressed,
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// a resize reflow is pending, don't show it yet
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eDropDownPositionPendingResize,
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// the dropdown has its final size and position and can be displayed here
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eDropDownPositionFinal
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};
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DropDownPositionState AbsolutelyPositionDropDown();
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// Helper for GetMinISize/GetPrefISize
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nscoord GetIntrinsicISize(nsRenderingContext* aRenderingContext,
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nsLayoutUtils::IntrinsicISizeType aType);
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class RedisplayTextEvent : public mozilla::Runnable {
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public:
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NS_DECL_NSIRUNNABLE
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explicit RedisplayTextEvent(nsComboboxControlFrame *c) : mControlFrame(c) {}
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void Revoke() { mControlFrame = nullptr; }
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private:
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nsComboboxControlFrame *mControlFrame;
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};
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/**
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* Show or hide the dropdown list.
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* @note This method might destroy |this|.
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*/
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void ShowPopup(bool aShowPopup);
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/**
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* Show or hide the dropdown list.
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* @param aShowList true to show, false to hide the dropdown.
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* @note This method might destroy |this|.
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* @return false if this frame is destroyed, true if still alive.
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*/
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bool ShowList(bool aShowList);
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void CheckFireOnChange();
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void FireValueChangeEvent();
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nsresult RedisplayText(int32_t aIndex);
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void HandleRedisplayTextEvent();
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void ActuallyDisplayText(bool aNotify);
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private:
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// If our total transform to the root frame of the root document is only a 2d
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// translation then return that translation, otherwise returns (0,0).
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nsPoint GetCSSTransformTranslation();
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protected:
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nsFrameList mPopupFrames; // additional named child list
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nsCOMPtr<nsIContent> mDisplayContent; // Anonymous content used to display the current selection
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nsCOMPtr<nsIContent> mButtonContent; // Anonymous content for the button
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nsContainerFrame* mDisplayFrame; // frame to display selection
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nsIFrame* mButtonFrame; // button frame
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nsIFrame* mDropdownFrame; // dropdown list frame
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nsIListControlFrame * mListControlFrame; // ListControl Interface for the dropdown frame
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// The inline size of our display area. Used by that frame's reflow
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// to size to the full inline size except the drop-marker.
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nscoord mDisplayISize;
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nsRevocableEventPtr<RedisplayTextEvent> mRedisplayTextEvent;
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int32_t mRecentSelectedIndex;
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int32_t mDisplayedIndex;
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nsString mDisplayedOptionText;
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// make someone to listen to the button. If its programmatically pressed by someone like Accessibility
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// then open or close the combo box.
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nsCOMPtr<nsIDOMEventListener> mButtonListener;
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// The last y-positions used for estimating available space before and
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// after for the dropdown list in GetAvailableDropdownSpace. These are
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// reset to nscoord_MIN in AbsolutelyPositionDropDown when placing the
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// dropdown at its actual position. The GetAvailableDropdownSpace call
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// from nsListControlFrame::ReflowAsDropdown use the last position.
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nscoord mLastDropDownBeforeScreenBCoord;
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nscoord mLastDropDownAfterScreenBCoord;
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// Current state of the dropdown list, true is dropped down.
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bool mDroppedDown;
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// See comment in HandleRedisplayTextEvent().
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bool mInRedisplayText;
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// Acting on ShowDropDown(true) is delayed until we're focused.
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bool mDelayedShowDropDown;
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bool mIsOpenInParentProcess;
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// static class data member for Bug 32920
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// only one control can be focused at a time
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static nsComboboxControlFrame* sFocused;
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#ifdef DO_REFLOW_COUNTER
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int32_t mReflowId;
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#endif
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};
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#endif
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