mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-13 10:25:01 +00:00
478 lines
15 KiB
C++
478 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
#ifndef nsListControlFrame_h___
|
|
#define nsListControlFrame_h___
|
|
|
|
#ifdef DEBUG_evaughan
|
|
//#define DEBUG_rods
|
|
#endif
|
|
|
|
#ifdef DEBUG_rods
|
|
//#define DO_REFLOW_DEBUG
|
|
//#define DO_REFLOW_COUNTER
|
|
//#define DO_UNCONSTRAINED_CHECK
|
|
//#define DO_PIXELS
|
|
#endif
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsGfxScrollFrame.h"
|
|
#include "nsIFormControlFrame.h"
|
|
#include "nsIListControlFrame.h"
|
|
#include "nsISelectControlFrame.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsSelectsAreaFrame.h"
|
|
|
|
// X.h defines KeyPress
|
|
#ifdef KeyPress
|
|
#undef KeyPress
|
|
#endif
|
|
|
|
class nsIComboboxControlFrame;
|
|
class nsPresContext;
|
|
class nsListEventListener;
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
class HTMLOptionElement;
|
|
class HTMLOptionsCollection;
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
/**
|
|
* Frame-based listbox.
|
|
*/
|
|
|
|
class nsListControlFrame final : public nsHTMLScrollFrame,
|
|
public nsIFormControlFrame,
|
|
public nsIListControlFrame,
|
|
public nsISelectControlFrame
|
|
{
|
|
public:
|
|
friend nsContainerFrame* NS_NewListControlFrame(nsIPresShell* aPresShell,
|
|
nsStyleContext* aContext);
|
|
|
|
NS_DECL_QUERYFRAME
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
// nsIFrame
|
|
virtual nsresult HandleEvent(nsPresContext* aPresContext,
|
|
mozilla::WidgetGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus) override;
|
|
|
|
virtual void SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList) override;
|
|
|
|
virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
|
|
virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
|
|
|
|
virtual void Reflow(nsPresContext* aCX,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus) override;
|
|
|
|
virtual void Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) override;
|
|
|
|
virtual void DidReflow(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState* aReflowState,
|
|
nsDidReflowStatus aStatus) override;
|
|
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
|
|
|
|
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) override;
|
|
|
|
virtual nsContainerFrame* GetContentInsertionFrame() override;
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::scrollFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const override;
|
|
|
|
virtual bool IsFrameOfType(uint32_t aFlags) const override
|
|
{
|
|
return nsHTMLScrollFrame::IsFrameOfType(aFlags &
|
|
~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
virtual nsresult GetFrameName(nsAString& aResult) const override;
|
|
#endif
|
|
|
|
// nsIFormControlFrame
|
|
virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue) override;
|
|
virtual void SetFocus(bool aOn = true, bool aRepaint = false) override;
|
|
|
|
virtual mozilla::ScrollbarStyles GetScrollbarStyles() const override;
|
|
virtual bool ShouldPropagateComputedBSizeToScrolledContent() const override;
|
|
|
|
// for accessibility purposes
|
|
#ifdef ACCESSIBILITY
|
|
virtual mozilla::a11y::AccType AccessibleType() override;
|
|
#endif
|
|
|
|
// nsIListControlFrame
|
|
virtual void SetComboboxFrame(nsIFrame* aComboboxFrame) override;
|
|
virtual int32_t GetSelectedIndex() override;
|
|
virtual mozilla::dom::HTMLOptionElement* GetCurrentOption() override;
|
|
|
|
/**
|
|
* Gets the text of the currently selected item.
|
|
* If the there are zero items then an empty string is returned
|
|
* If there is nothing selected, then the 0th item's text is returned.
|
|
*/
|
|
virtual void GetOptionText(uint32_t aIndex, nsAString& aStr) override;
|
|
|
|
virtual void CaptureMouseEvents(bool aGrabMouseEvents) override;
|
|
virtual nscoord GetBSizeOfARow() override;
|
|
virtual uint32_t GetNumberOfOptions() override;
|
|
virtual void AboutToDropDown() override;
|
|
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void AboutToRollup() override;
|
|
|
|
/**
|
|
* Dispatch a DOM onchange event synchroniously.
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void FireOnChange() override;
|
|
|
|
/**
|
|
* Makes aIndex the selected option of a combobox list.
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
virtual void ComboboxFinish(int32_t aIndex) override;
|
|
virtual void OnContentReset() override;
|
|
|
|
// nsISelectControlFrame
|
|
NS_IMETHOD AddOption(int32_t index) override;
|
|
NS_IMETHOD RemoveOption(int32_t index) override;
|
|
NS_IMETHOD DoneAddingChildren(bool aIsDone) override;
|
|
|
|
/**
|
|
* Gets the content (an option) by index and then set it as
|
|
* being selected or not selected.
|
|
*/
|
|
NS_IMETHOD OnOptionSelected(int32_t aIndex, bool aSelected) override;
|
|
NS_IMETHOD OnSetSelectedIndex(int32_t aOldIndex, int32_t aNewIndex) override;
|
|
|
|
/**
|
|
* Mouse event listeners.
|
|
* @note These methods might destroy the frame, pres shell and other objects.
|
|
*/
|
|
nsresult MouseDown(nsIDOMEvent* aMouseEvent);
|
|
nsresult MouseUp(nsIDOMEvent* aMouseEvent);
|
|
nsresult MouseMove(nsIDOMEvent* aMouseEvent);
|
|
nsresult DragMove(nsIDOMEvent* aMouseEvent);
|
|
nsresult KeyDown(nsIDOMEvent* aKeyEvent);
|
|
nsresult KeyPress(nsIDOMEvent* aKeyEvent);
|
|
|
|
/**
|
|
* Returns the options collection for mContent, if any.
|
|
*/
|
|
mozilla::dom::HTMLOptionsCollection* GetOptions() const;
|
|
/**
|
|
* Returns the HTMLOptionElement for a given index in mContent's collection.
|
|
*/
|
|
mozilla::dom::HTMLOptionElement* GetOption(uint32_t aIndex) const;
|
|
|
|
static void ComboboxFocusSet();
|
|
|
|
// Helper
|
|
bool IsFocused() { return this == mFocused; }
|
|
|
|
/**
|
|
* Function to paint the focus rect when our nsSelectsAreaFrame is painting.
|
|
* @param aPt the offset of this frame, relative to the rendering reference
|
|
* frame
|
|
*/
|
|
void PaintFocus(nsRenderingContext& aRC, nsPoint aPt);
|
|
/**
|
|
* If this frame IsFocused(), invalidates an area that includes anything
|
|
* that PaintFocus will or could have painted --- basically the whole
|
|
* GetOptionsContainer, plus some extra stuff if there are no options. This
|
|
* must be called every time mEndSelectionIndex changes.
|
|
*/
|
|
void InvalidateFocus();
|
|
|
|
/**
|
|
* Function to calculate the block size of a row, for use with the
|
|
* "size" attribute.
|
|
* Can't be const because GetNumberOfOptions() isn't const.
|
|
*/
|
|
nscoord CalcBSizeOfARow();
|
|
|
|
/**
|
|
* Function to ask whether we're currently in what might be the
|
|
* first pass of a two-pass reflow.
|
|
*/
|
|
bool MightNeedSecondPass() const {
|
|
return mMightNeedSecondPass;
|
|
}
|
|
|
|
void SetSuppressScrollbarUpdate(bool aSuppress) {
|
|
nsHTMLScrollFrame::SetSuppressScrollbarUpdate(aSuppress);
|
|
}
|
|
|
|
/**
|
|
* Return whether the list is in dropdown mode.
|
|
*/
|
|
bool IsInDropDownMode() const;
|
|
|
|
/**
|
|
* Return the number of displayed rows in the list.
|
|
*/
|
|
uint32_t GetNumDisplayRows() const { return mNumDisplayRows; }
|
|
|
|
/**
|
|
* Return true if the drop-down list can display more rows.
|
|
* (always false if not in drop-down mode)
|
|
*/
|
|
bool GetDropdownCanGrow() const { return mDropdownCanGrow; }
|
|
|
|
/**
|
|
* Dropdowns need views
|
|
*/
|
|
virtual bool NeedsView() override { return IsInDropDownMode(); }
|
|
|
|
/**
|
|
* Frees statics owned by this class.
|
|
*/
|
|
static void Shutdown();
|
|
|
|
#ifdef ACCESSIBILITY
|
|
/**
|
|
* Post a custom DOM event for the change, so that accessibility can
|
|
* fire a native focus event for accessibility
|
|
* (Some 3rd party products need to track our focus)
|
|
*/
|
|
void FireMenuItemActiveEvent(); // Inform assistive tech what got focused
|
|
#endif
|
|
|
|
protected:
|
|
/**
|
|
* Updates the selected text in a combobox and then calls FireOnChange().
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
* Returns false if calling it destroyed |this|.
|
|
*/
|
|
bool UpdateSelection();
|
|
|
|
/**
|
|
* Returns whether mContent supports multiple selection.
|
|
*/
|
|
bool GetMultiple() const {
|
|
return mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::multiple);
|
|
}
|
|
|
|
|
|
/**
|
|
* Toggles (show/hide) the combobox dropdown menu.
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
void DropDownToggleKey(nsIDOMEvent* aKeyEvent);
|
|
|
|
nsresult IsOptionDisabled(int32_t anIndex, bool &aIsDisabled);
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
void ScrollToFrame(mozilla::dom::HTMLOptionElement& aOptElement);
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
void ScrollToIndex(int32_t anIndex);
|
|
|
|
/**
|
|
* When the user clicks on the comboboxframe to show the dropdown
|
|
* listbox, they then have to move the mouse into the list. We don't
|
|
* want to process those mouse events as selection events (i.e., to
|
|
* scroll list items into view). So we ignore the events until
|
|
* the mouse moves below our border-inner-edge, when
|
|
* mItemSelectionStarted is set.
|
|
*
|
|
* @param aPoint relative to this frame
|
|
*/
|
|
bool IgnoreMouseEventForSelection(nsIDOMEvent* aEvent);
|
|
|
|
/**
|
|
* If the dropdown is showing and the mouse has moved below our
|
|
* border-inner-edge, then set mItemSelectionStarted.
|
|
*/
|
|
void UpdateInListState(nsIDOMEvent* aEvent);
|
|
void AdjustIndexForDisabledOpt(int32_t aStartIndex, int32_t &anNewIndex,
|
|
int32_t aNumOptions, int32_t aDoAdjustInc, int32_t aDoAdjustIncNext);
|
|
|
|
/**
|
|
* Resets the select back to it's original default values;
|
|
* those values as determined by the original HTML
|
|
*/
|
|
virtual void ResetList(bool aAllowScrolling);
|
|
|
|
explicit nsListControlFrame(nsStyleContext* aContext);
|
|
virtual ~nsListControlFrame();
|
|
|
|
/**
|
|
* Sets the mSelectedIndex and mOldSelectedIndex from figuring out what
|
|
* item was selected using content
|
|
* @param aPoint the event point, in listcontrolframe coordinates
|
|
* @return NS_OK if it successfully found the selection
|
|
*/
|
|
nsresult GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent, int32_t& aCurIndex);
|
|
|
|
bool CheckIfAllFramesHere();
|
|
bool IsLeftButton(nsIDOMEvent* aMouseEvent);
|
|
|
|
// guess at a row block size based on our own style.
|
|
nscoord CalcFallbackRowBSize(float aFontSizeInflation);
|
|
|
|
// CalcIntrinsicBSize computes our intrinsic block size (taking the
|
|
// "size" attribute into account). This should only be called in
|
|
// non-dropdown mode.
|
|
nscoord CalcIntrinsicBSize(nscoord aBSizeOfARow, int32_t aNumberOfOptions);
|
|
|
|
// Dropped down stuff
|
|
void SetComboboxItem(int32_t aIndex);
|
|
|
|
/**
|
|
* Method to reflow ourselves as a dropdown list. This differs from
|
|
* reflow as a listbox because the criteria for needing a second
|
|
* pass are different. This will be called from Reflow() as needed.
|
|
*/
|
|
void ReflowAsDropdown(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
|
|
// Selection
|
|
bool SetOptionsSelectedFromFrame(int32_t aStartIndex,
|
|
int32_t aEndIndex,
|
|
bool aValue,
|
|
bool aClearAll);
|
|
bool ToggleOptionSelectedFromFrame(int32_t aIndex);
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
bool SingleSelection(int32_t aClickedIndex, bool aDoToggle);
|
|
bool ExtendedSelection(int32_t aStartIndex, int32_t aEndIndex,
|
|
bool aClearAll);
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
bool PerformSelection(int32_t aClickedIndex, bool aIsShift,
|
|
bool aIsControl);
|
|
/**
|
|
* @note This method might destroy the frame, pres shell and other objects.
|
|
*/
|
|
bool HandleListSelection(nsIDOMEvent * aDOMEvent, int32_t selectedIndex);
|
|
void InitSelectionRange(int32_t aClickedIndex);
|
|
void PostHandleKeyEvent(int32_t aNewIndex, uint32_t aCharCode,
|
|
bool aIsShift, bool aIsControlOrMeta);
|
|
|
|
public:
|
|
nsSelectsAreaFrame* GetOptionsContainer() const {
|
|
return static_cast<nsSelectsAreaFrame*>(GetScrolledFrame());
|
|
}
|
|
|
|
protected:
|
|
nscoord BSizeOfARow() {
|
|
return GetOptionsContainer()->BSizeOfARow();
|
|
}
|
|
|
|
/**
|
|
* @return how many displayable options/optgroups this frame has.
|
|
*/
|
|
uint32_t GetNumberOfRows();
|
|
|
|
// Data Members
|
|
int32_t mStartSelectionIndex;
|
|
int32_t mEndSelectionIndex;
|
|
|
|
nsIComboboxControlFrame *mComboboxFrame;
|
|
uint32_t mNumDisplayRows;
|
|
bool mChangesSinceDragStart:1;
|
|
bool mButtonDown:1;
|
|
// Has the user selected a visible item since we showed the
|
|
// dropdown?
|
|
bool mItemSelectionStarted:1;
|
|
|
|
bool mIsAllContentHere:1;
|
|
bool mIsAllFramesHere:1;
|
|
bool mHasBeenInitialized:1;
|
|
bool mNeedToReset:1;
|
|
bool mPostChildrenLoadedReset:1;
|
|
|
|
//bool value for multiple discontiguous selection
|
|
bool mControlSelectMode:1;
|
|
|
|
// True if we're in the middle of a reflow and might need a second
|
|
// pass. This only happens for auto heights.
|
|
bool mMightNeedSecondPass:1;
|
|
|
|
/**
|
|
* Set to aPresContext->HasPendingInterrupt() at the start of Reflow.
|
|
* Set to false at the end of DidReflow.
|
|
*/
|
|
bool mHasPendingInterruptAtStartOfReflow:1;
|
|
|
|
// True if the drop-down can show more rows. Always false if this list
|
|
// is not in drop-down mode.
|
|
bool mDropdownCanGrow:1;
|
|
|
|
// True if the selection can be set to nothing or disabled options.
|
|
bool mForceSelection:1;
|
|
|
|
// The last computed block size we reflowed at if we're a combobox
|
|
// dropdown.
|
|
// XXXbz should we be using a subclass here? Or just not worry
|
|
// about the extra member on listboxes?
|
|
nscoord mLastDropdownComputedBSize;
|
|
|
|
// At the time of our last dropdown, the backstop color to draw in case we
|
|
// are translucent.
|
|
nscolor mLastDropdownBackstopColor;
|
|
|
|
nsRefPtr<nsListEventListener> mEventListener;
|
|
|
|
static nsListControlFrame * mFocused;
|
|
static nsString * sIncrementalString;
|
|
|
|
#ifdef DO_REFLOW_COUNTER
|
|
int32_t mReflowId;
|
|
#endif
|
|
|
|
private:
|
|
// for incremental typing navigation
|
|
static nsAString& GetIncrementalString ();
|
|
static DOMTimeStamp gLastKeyTime;
|
|
|
|
class MOZ_STACK_CLASS AutoIncrementalSearchResetter
|
|
{
|
|
public:
|
|
AutoIncrementalSearchResetter() :
|
|
mCancelled(false)
|
|
{
|
|
}
|
|
~AutoIncrementalSearchResetter()
|
|
{
|
|
if (!mCancelled) {
|
|
nsListControlFrame::GetIncrementalString().Truncate();
|
|
}
|
|
}
|
|
void Cancel()
|
|
{
|
|
mCancelled = true;
|
|
}
|
|
private:
|
|
bool mCancelled;
|
|
};
|
|
};
|
|
|
|
#endif /* nsListControlFrame_h___ */
|
|
|