144 lines
4.7 KiB
C++
144 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#include "mozilla/Attributes.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 "nsThreadUtils.h"
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#include "nsHTMLButtonControlFrame.h"
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namespace mozilla {
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class PresShell;
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class HTMLSelectEventListener;
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class ComboboxLabelFrame;
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namespace dom {
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class HTMLSelectElement;
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}
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} // namespace mozilla
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class nsComboboxControlFrame final : public nsHTMLButtonControlFrame,
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public nsIAnonymousContentCreator,
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public nsISelectControlFrame {
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using Element = mozilla::dom::Element;
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public:
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friend class mozilla::ComboboxLabelFrame;
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explicit nsComboboxControlFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext);
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~nsComboboxControlFrame();
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(nsComboboxControlFrame)
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// nsIAnonymousContentCreator
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nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) final;
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void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter) final;
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#ifdef ACCESSIBILITY
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mozilla::a11y::AccType AccessibleType() final;
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#endif
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nscoord IntrinsicISize(const mozilla::IntrinsicSizeInput& aInput,
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mozilla::IntrinsicISizeType aType) final;
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// We're a leaf, so we need to report ourselves as the content insertion
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// frame.
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nsContainerFrame* GetContentInsertionFrame() override { return this; }
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void Reflow(nsPresContext* aCX, ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput, nsReflowStatus& aStatus) final;
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) final;
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void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) final;
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void Destroy(DestroyContext&) final;
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#ifdef DEBUG_FRAME_DUMP
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nsresult GetFrameName(nsAString& aResult) const final {
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return MakeFrameName(u"ComboboxControl"_ns, aResult);
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}
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#endif
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/**
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* @note This method might destroy |this|.
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*/
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void FireValueChangeEvent();
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nsresult RedisplaySelectedText();
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bool IsDroppedDown() const;
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// nsISelectControlFrame
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NS_IMETHOD AddOption(int32_t index) final;
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NS_IMETHOD RemoveOption(int32_t index) final;
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NS_IMETHOD DoneAddingChildren(bool aIsDone) final;
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NS_IMETHOD OnOptionSelected(int32_t aIndex, bool aSelected) final;
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NS_IMETHOD_(void)
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OnSetSelectedIndex(int32_t aOldIndex, int32_t aNewIndex) final;
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int32_t CharCountOfLargestOptionForInflation() const;
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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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// Return true if we should render a dropdown button.
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bool HasDropDownButton() const;
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nscoord DropDownButtonISize();
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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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nscoord GetLongestOptionISize(gfxContext*) const;
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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)
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: mozilla::Runnable("nsComboboxControlFrame::RedisplayTextEvent"),
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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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nsresult RedisplayText();
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void HandleRedisplayTextEvent();
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void ActuallyDisplayText(bool aNotify);
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mozilla::dom::HTMLSelectElement& Select() const;
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void GetOptionText(uint32_t aIndex, nsAString& aText) const;
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RefPtr<Element> mDisplayLabel; // Anonymous content for the label
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RefPtr<Element> mButtonContent; // Anonymous content for the button
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nsRevocableEventPtr<RedisplayTextEvent> mRedisplayTextEvent;
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// The inline size of our display area. Used by that frame's reflow to size to
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// the full inline size except the drop-marker.
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nscoord mDisplayISize = 0;
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int32_t mDisplayedIndex = -1;
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nsString mDisplayedOptionTextOrPreview;
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RefPtr<mozilla::HTMLSelectEventListener> mEventListener;
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};
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#endif
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