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gecko-dev/layout/forms/nsComboboxControlFrame.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "nsComboboxControlFrame.h"
#include "gfxContext.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/PathHelpers.h"
#include "nsCOMPtr.h"
#include "nsFocusManager.h"
#include "nsCheckboxRadioFrame.h"
#include "nsGkAtoms.h"
#include "nsCSSAnonBoxes.h"
#include "nsHTMLParts.h"
#include "nsIFormControl.h"
#include "nsNameSpaceManager.h"
#include "nsListControlFrame.h"
#include "nsPIDOMWindow.h"
#include "mozilla/PresState.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIContentInlines.h"
#include "nsIDOMEventListener.h"
#include "nsISelectControlFrame.h"
#include "nsContentUtils.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/HTMLSelectElement.h"
#include "mozilla/dom/Document.h"
#include "nsIScrollableFrame.h"
#include "mozilla/ServoStyleSet.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsLayoutUtils.h"
#include "nsDisplayList.h"
#include "nsITheme.h"
#include "nsStyleConsts.h"
#include "mozilla/Likely.h"
#include <algorithm>
#include "nsTextNode.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/EventStates.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/PresShell.h"
#include "mozilla/PresShellInlines.h"
#include "mozilla/Unused.h"
#include "gfx2DGlue.h"
#include "mozilla/widget/nsAutoRollup.h"
#ifdef XP_WIN
# define COMBOBOX_ROLLUP_CONSUME_EVENT 0
#else
# define COMBOBOX_ROLLUP_CONSUME_EVENT 1
#endif
using namespace mozilla;
using namespace mozilla::gfx;
using mozilla::dom::Document;
NS_IMETHODIMP
nsComboboxControlFrame::RedisplayTextEvent::Run() {
if (mControlFrame) mControlFrame->HandleRedisplayTextEvent();
return NS_OK;
}
#define FIX_FOR_BUG_53259
// Drop down list event management.
// The combo box uses the following strategy for managing the drop-down list.
// If the combo box or its arrow button is clicked on the drop-down list is
// displayed If mouse exits the combo box with the drop-down list displayed the
// drop-down list is asked to capture events The drop-down list will capture all
// events including mouse down and up and will always return with
// ListWasSelected method call regardless of whether an item in the list was
// actually selected.
// The ListWasSelected code will turn off mouse-capture for the drop-down list.
// The drop-down list does not explicitly set capture when it is in the
// drop-down mode.
/**
* Helper class that listens to the combo boxes button. If the button is pressed
* the combo box is toggled to open or close. this is used by Accessibility
* which presses that button Programmatically.
*/
class nsComboButtonListener final : public nsIDOMEventListener {
private:
virtual ~nsComboButtonListener() {}
public:
NS_DECL_ISUPPORTS
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD HandleEvent(dom::Event*) override {
mComboBox->ShowDropDown(!mComboBox->IsDroppedDown());
return NS_OK;
}
explicit nsComboButtonListener(nsComboboxControlFrame* aCombobox) {
mComboBox = aCombobox;
}
nsComboboxControlFrame* mComboBox;
};
NS_IMPL_ISUPPORTS(nsComboButtonListener, nsIDOMEventListener)
// static class data member for Bug 32920
nsComboboxControlFrame* nsComboboxControlFrame::sFocused = nullptr;
nsComboboxControlFrame* NS_NewComboboxControlFrame(PresShell* aPresShell,
ComputedStyle* aStyle,
nsFrameState aStateFlags) {
nsComboboxControlFrame* it = new (aPresShell)
nsComboboxControlFrame(aStyle, aPresShell->GetPresContext());
if (it) {
// set the state flags (if any are provided)
it->AddStateBits(aStateFlags);
}
return it;
}
NS_IMPL_FRAMEARENA_HELPERS(nsComboboxControlFrame)
//-----------------------------------------------------------
// Reflow Debugging Macros
// These let us "see" how many reflow counts are happening
//-----------------------------------------------------------
#ifdef DO_REFLOW_COUNTER
# define MAX_REFLOW_CNT 1024
static int32_t gTotalReqs = 0;
;
static int32_t gTotalReflows = 0;
;
static int32_t gReflowControlCntRQ[MAX_REFLOW_CNT];
static int32_t gReflowControlCnt[MAX_REFLOW_CNT];
static int32_t gReflowInx = -1;
# define REFLOW_COUNTER() \
if (mReflowId > -1) gReflowControlCnt[mReflowId]++;
# define REFLOW_COUNTER_REQUEST() \
if (mReflowId > -1) gReflowControlCntRQ[mReflowId]++;
# define REFLOW_COUNTER_DUMP(__desc) \
if (mReflowId > -1) { \
gTotalReqs += gReflowControlCntRQ[mReflowId]; \
gTotalReflows += gReflowControlCnt[mReflowId]; \
printf("** Id:%5d %s RF: %d RQ: %d %d/%d %5.2f\n", mReflowId, \
(__desc), gReflowControlCnt[mReflowId], \
gReflowControlCntRQ[mReflowId], gTotalReflows, gTotalReqs, \
float(gTotalReflows) / float(gTotalReqs) * 100.0f); \
}
# define REFLOW_COUNTER_INIT() \
if (gReflowInx < MAX_REFLOW_CNT) { \
gReflowInx++; \
mReflowId = gReflowInx; \
gReflowControlCnt[mReflowId] = 0; \
gReflowControlCntRQ[mReflowId] = 0; \
} else { \
mReflowId = -1; \
}
// reflow messages
# define REFLOW_DEBUG_MSG(_msg1) printf((_msg1))
# define REFLOW_DEBUG_MSG2(_msg1, _msg2) printf((_msg1), (_msg2))
# define REFLOW_DEBUG_MSG3(_msg1, _msg2, _msg3) \
printf((_msg1), (_msg2), (_msg3))
# define REFLOW_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4) \
printf((_msg1), (_msg2), (_msg3), (_msg4))
#else //-------------
# define REFLOW_COUNTER_REQUEST()
# define REFLOW_COUNTER()
# define REFLOW_COUNTER_DUMP(__desc)
# define REFLOW_COUNTER_INIT()
# define REFLOW_DEBUG_MSG(_msg)
# define REFLOW_DEBUG_MSG2(_msg1, _msg2)
# define REFLOW_DEBUG_MSG3(_msg1, _msg2, _msg3)
# define REFLOW_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4)
#endif
//------------------------------------------
// This is for being VERY noisy
//------------------------------------------
#ifdef DO_VERY_NOISY
# define REFLOW_NOISY_MSG(_msg1) printf((_msg1))
# define REFLOW_NOISY_MSG2(_msg1, _msg2) printf((_msg1), (_msg2))
# define REFLOW_NOISY_MSG3(_msg1, _msg2, _msg3) \
printf((_msg1), (_msg2), (_msg3))
# define REFLOW_NOISY_MSG4(_msg1, _msg2, _msg3, _msg4) \
printf((_msg1), (_msg2), (_msg3), (_msg4))
#else
# define REFLOW_NOISY_MSG(_msg)
# define REFLOW_NOISY_MSG2(_msg1, _msg2)
# define REFLOW_NOISY_MSG3(_msg1, _msg2, _msg3)
# define REFLOW_NOISY_MSG4(_msg1, _msg2, _msg3, _msg4)
#endif
//------------------------------------------
// Displays value in pixels or twips
//------------------------------------------
#ifdef DO_PIXELS
# define PX(__v) __v / 15
#else
# define PX(__v) __v
#endif
//------------------------------------------------------
//-- Done with macros
//------------------------------------------------------
nsComboboxControlFrame::nsComboboxControlFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsBlockFrame(aStyle, aPresContext, kClassID),
mDisplayFrame(nullptr),
mButtonFrame(nullptr),
mDropdownFrame(nullptr),
mListControlFrame(nullptr),
mDisplayISize(0),
mMaxDisplayISize(0),
mRecentSelectedIndex(NS_SKIP_NOTIFY_INDEX),
mDisplayedIndex(-1),
mLastDropDownBeforeScreenBCoord(nscoord_MIN),
mLastDropDownAfterScreenBCoord(nscoord_MIN),
mDroppedDown(false),
mInRedisplayText(false),
mDelayedShowDropDown(false),
mIsOpenInParentProcess(false){REFLOW_COUNTER_INIT()}
//--------------------------------------------------------------
nsComboboxControlFrame::~nsComboboxControlFrame() {
REFLOW_COUNTER_DUMP("nsCCF");
}
//--------------------------------------------------------------
NS_QUERYFRAME_HEAD(nsComboboxControlFrame)
NS_QUERYFRAME_ENTRY(nsComboboxControlFrame)
NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsISelectControlFrame)
NS_QUERYFRAME_ENTRY(nsIStatefulFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
#ifdef ACCESSIBILITY
a11y::AccType nsComboboxControlFrame::AccessibleType() {
return a11y::eHTMLComboboxType;
}
#endif
void nsComboboxControlFrame::SetFocus(bool aOn, bool aRepaint) {
AutoWeakFrame weakFrame(this);
if (aOn) {
nsListControlFrame::ComboboxFocusSet();
sFocused = this;
if (mDelayedShowDropDown) {
ShowDropDown(true); // might destroy us
if (!weakFrame.IsAlive()) {
return;
}
}
} else {
sFocused = nullptr;
mDelayedShowDropDown = false;
if (mDroppedDown) {
mListControlFrame->ComboboxFinish(mDisplayedIndex); // might destroy us
if (!weakFrame.IsAlive()) {
return;
}
}
// May delete |this|.
mListControlFrame->FireOnInputAndOnChange();
}
if (!weakFrame.IsAlive()) {
return;
}
// This is needed on a temporary basis. It causes the focus
// rect to be drawn. This is much faster than ReResolvingStyle
// Bug 32920
InvalidateFrame();
}
void nsComboboxControlFrame::ShowPopup(bool aShowPopup) {
nsView* view = mDropdownFrame->GetView();
nsViewManager* viewManager = view->GetViewManager();
if (aShowPopup) {
nsRect rect = mDropdownFrame->GetRect();
rect.x = rect.y = 0;
viewManager->ResizeView(view, rect);
viewManager->SetViewVisibility(view, nsViewVisibility_kShow);
} else {
viewManager->SetViewVisibility(view, nsViewVisibility_kHide);
nsRect emptyRect(0, 0, 0, 0);
viewManager->ResizeView(view, emptyRect);
}
// fire a popup dom event if it is safe to do so
RefPtr<mozilla::PresShell> presShell = PresContext()->GetPresShell();
if (presShell && nsContentUtils::IsSafeToRunScript()) {
nsEventStatus status = nsEventStatus_eIgnore;
WidgetMouseEvent event(true,
aShowPopup ? eXULPopupShowing : eXULPopupHiding,
nullptr, WidgetMouseEvent::eReal);
nsCOMPtr<nsIContent> content = mContent;
presShell->HandleDOMEventWithTarget(content, &event, &status);
}
}
bool nsComboboxControlFrame::ShowList(bool aShowList) {
nsView* view = mDropdownFrame->GetView();
if (aShowList) {
NS_ASSERTION(
!view->HasWidget(),
"We shouldn't have a widget before we need to display the popup");
// Create the widget for the drop-down list
view->GetViewManager()->SetViewFloating(view, true);
nsWidgetInitData widgetData;
widgetData.mWindowType = eWindowType_popup;
widgetData.mBorderStyle = eBorderStyle_default;
view->CreateWidgetForPopup(&widgetData);
} else {
nsIWidget* widget = view->GetWidget();
if (widget) {
// We must do this before ShowPopup in case it destroys us (bug 813442).
widget->CaptureRollupEvents(this, false);
}
}
AutoWeakFrame weakFrame(this);
ShowPopup(aShowList); // might destroy us
if (!weakFrame.IsAlive()) {
return false;
}
mDroppedDown = aShowList;
nsIWidget* widget = view->GetWidget();
if (mDroppedDown) {
// The listcontrol frame will call back to the nsComboboxControlFrame's
// ListWasSelected which will stop the capture.
mListControlFrame->AboutToDropDown();
mListControlFrame->CaptureMouseEvents(true);
if (widget) {
widget->CaptureRollupEvents(this, true);
}
} else {
if (widget) {
view->DestroyWidget();
}
}
return weakFrame.IsAlive();
}
class nsResizeDropdownAtFinalPosition final : public nsIReflowCallback,
public Runnable {
public:
explicit nsResizeDropdownAtFinalPosition(nsComboboxControlFrame* aFrame)
: mozilla::Runnable("nsResizeDropdownAtFinalPosition"), mFrame(aFrame) {}
protected:
~nsResizeDropdownAtFinalPosition() {}
public:
virtual bool ReflowFinished() override {
Run();
NS_RELEASE_THIS();
return false;
}
virtual void ReflowCallbackCanceled() override { NS_RELEASE_THIS(); }
NS_IMETHOD Run() override {
if (mFrame.IsAlive()) {
static_cast<nsComboboxControlFrame*>(mFrame.GetFrame())
->AbsolutelyPositionDropDown();
}
return NS_OK;
}
WeakFrame mFrame;
};
void nsComboboxControlFrame::ReflowDropdown(nsPresContext* aPresContext,
const ReflowInput& aReflowInput) {
// All we want out of it later on, really, is the block size of a row, so we
// don't even need to cache mDropdownFrame's ascent or anything. If we don't
// need to reflow it, just bail out here.
if (!aReflowInput.ShouldReflowAllKids() &&
!NS_SUBTREE_DIRTY(mDropdownFrame)) {
return;
}
// XXXbz this will, for small-block-size dropdowns, have extra space
// on the appropriate edge for the scrollbar we don't show... but
// that's the best we can do here for now.
WritingMode wm = mDropdownFrame->GetWritingMode();
LogicalSize availSize = aReflowInput.AvailableSize(wm);
availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput kidReflowInput(aPresContext, aReflowInput, mDropdownFrame,
availSize);
// If the dropdown's intrinsic inline size is narrower than our
// specified inline size, then expand it out. We want our border-box
// inline size to end up the same as the dropdown's so account for
// both sets of mComputedBorderPadding.
nscoord forcedISize =
aReflowInput.ComputedISize() +
aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm) -
kidReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm);
kidReflowInput.SetComputedISize(
std::max(kidReflowInput.ComputedISize(), forcedISize));
// ensure we start off hidden
if (!mDroppedDown && GetStateBits() & NS_FRAME_FIRST_REFLOW) {
nsView* view = mDropdownFrame->GetView();
nsViewManager* viewManager = view->GetViewManager();
viewManager->SetViewVisibility(view, nsViewVisibility_kHide);
nsRect emptyRect(0, 0, 0, 0);
viewManager->ResizeView(view, emptyRect);
}
// Allow the child to move/size/change-visibility its view if it's currently
// dropped down
ReflowChildFlags flags = mDroppedDown ? ReflowChildFlags::Default
: ReflowChildFlags::NoMoveFrame |
ReflowChildFlags::NoVisibility |
ReflowChildFlags::NoSizeView;
// XXX Can this be different from the dropdown's writing mode?
// That would be odd!
// Note that we don't need to pass the true frame position or container size
// to ReflowChild or FinishReflowChild here; it will be positioned as needed
// by AbsolutelyPositionDropDown().
WritingMode outerWM = GetWritingMode();
const nsSize dummyContainerSize;
ReflowOutput desiredSize(aReflowInput);
nsReflowStatus ignoredStatus;
ReflowChild(mDropdownFrame, aPresContext, desiredSize, kidReflowInput,
outerWM, LogicalPoint(outerWM), dummyContainerSize, flags,
ignoredStatus);
// Set the child's width and height to its desired size
FinishReflowChild(mDropdownFrame, aPresContext, desiredSize, &kidReflowInput,
outerWM, LogicalPoint(outerWM), dummyContainerSize, flags);
}
nsPoint nsComboboxControlFrame::GetCSSTransformTranslation() {
nsIFrame* frame = this;
bool is3DTransform = false;
Matrix transform;
while (frame) {
nsIFrame* parent;
Matrix4x4Flagged ctm = frame->GetTransformMatrix(nullptr, &parent);
Matrix matrix;
if (ctm.Is2D(&matrix)) {
transform = transform * matrix;
} else {
is3DTransform = true;
break;
}
frame = parent;
}
nsPoint translation;
if (!is3DTransform && !transform.HasNonTranslation()) {
nsPresContext* pc = PresContext();
// To get the translation introduced only by transforms we subtract the
// regular non-transform translation.
nsRootPresContext* rootPC = pc->GetRootPresContext();
if (rootPC) {
int32_t apd = pc->AppUnitsPerDevPixel();
translation.x = NSFloatPixelsToAppUnits(transform._31, apd);
translation.y = NSFloatPixelsToAppUnits(transform._32, apd);
translation -= GetOffsetToCrossDoc(rootPC->PresShell()->GetRootFrame());
}
}
return translation;
}
class nsAsyncRollup : public Runnable {
public:
explicit nsAsyncRollup(nsComboboxControlFrame* aFrame)
: mozilla::Runnable("nsAsyncRollup"), mFrame(aFrame) {}
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
if (mFrame.IsAlive()) {
static_cast<nsComboboxControlFrame*>(mFrame.GetFrame())->RollupFromList();
}
return NS_OK;
}
WeakFrame mFrame;
};
class nsAsyncResize : public Runnable {
public:
explicit nsAsyncResize(nsComboboxControlFrame* aFrame)
: mozilla::Runnable("nsAsyncResize"), mFrame(aFrame) {}
MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
if (mFrame.IsAlive()) {
nsComboboxControlFrame* combo =
static_cast<nsComboboxControlFrame*>(mFrame.GetFrame());
static_cast<nsListControlFrame*>(combo->mDropdownFrame)
->SetSuppressScrollbarUpdate(true);
RefPtr<PresShell> presShell = mFrame->PresShell();
presShell->FrameNeedsReflow(combo->mDropdownFrame, IntrinsicDirty::Resize,
NS_FRAME_IS_DIRTY);
presShell->FlushPendingNotifications(FlushType::Layout);
if (mFrame.IsAlive()) {
combo = static_cast<nsComboboxControlFrame*>(mFrame.GetFrame());
static_cast<nsListControlFrame*>(combo->mDropdownFrame)
->SetSuppressScrollbarUpdate(false);
if (combo->mDelayedShowDropDown) {
combo->ShowDropDown(true);
}
}
}
return NS_OK;
}
WeakFrame mFrame;
};
void nsComboboxControlFrame::GetAvailableDropdownSpace(
WritingMode aWM, nscoord* aBefore, nscoord* aAfter,
LogicalPoint* aTranslation) {
MOZ_ASSERT(!XRE_IsContentProcess());
// Note: At first glance, it appears that you could simply get the
// absolute bounding box for the dropdown list by first getting its
// view, then getting the view's nsIWidget, then asking the nsIWidget
// for its AbsoluteBounds.
// The problem with this approach, is that the dropdown list's bcoord
// location can change based on whether the dropdown is placed after
// or before the display frame. The approach taken here is to get the
// absolute position of the display frame and use its location to
// determine if the dropdown will go offscreen.
// Normal frame geometry (eg GetOffsetTo, mRect) doesn't include transforms.
// In the special case that our transform is only a 2D translation we
// introduce this hack so that the dropdown will show up in the right place.
// Use null container size when converting a vector from logical to physical.
const nsSize nullContainerSize;
*aTranslation =
LogicalPoint(aWM, GetCSSTransformTranslation(), nullContainerSize);
*aBefore = 0;
*aAfter = 0;
nsRect screen = nsCheckboxRadioFrame::GetUsableScreenRect(PresContext());
nsSize containerSize = screen.Size();
LogicalRect logicalScreen(aWM, screen, containerSize);
if (mLastDropDownAfterScreenBCoord == nscoord_MIN) {
LogicalRect thisScreenRect(aWM, GetScreenRectInAppUnits(), containerSize);
mLastDropDownAfterScreenBCoord =
thisScreenRect.BEnd(aWM) + aTranslation->B(aWM);
mLastDropDownBeforeScreenBCoord =
thisScreenRect.BStart(aWM) + aTranslation->B(aWM);
}
nscoord minBCoord;
nsPresContext* pc = PresContext()->GetToplevelContentDocumentPresContext();
nsIFrame* root = pc ? pc->PresShell()->GetRootFrame() : nullptr;
if (root) {
minBCoord = LogicalRect(aWM, root->GetScreenRectInAppUnits(), containerSize)
.BStart(aWM);
if (mLastDropDownAfterScreenBCoord < minBCoord) {
// Don't allow the drop-down to be placed before the content area.
return;
}
} else {
minBCoord = logicalScreen.BStart(aWM);
}
nscoord after = logicalScreen.BEnd(aWM) - mLastDropDownAfterScreenBCoord;
nscoord before = mLastDropDownBeforeScreenBCoord - minBCoord;
// If the difference between the space before and after is less
// than a row-block-size, then we favor the space after.
if (before >= after) {
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame);
nscoord rowBSize = lcf->GetBSizeOfARow();
if (before < after + rowBSize) {
before -= rowBSize;
}
}
*aAfter = after;
*aBefore = before;
}
nsComboboxControlFrame::DropDownPositionState
nsComboboxControlFrame::AbsolutelyPositionDropDown() {
if (XRE_IsContentProcess()) {
return eDropDownPositionSuppressed;
}
WritingMode wm = GetWritingMode();
LogicalPoint translation(wm);
nscoord before, after;
mLastDropDownAfterScreenBCoord = nscoord_MIN;
GetAvailableDropdownSpace(wm, &before, &after, &translation);
if (before <= 0 && after <= 0) {
if (IsDroppedDown()) {
// Hide the view immediately to minimize flicker.
nsView* view = mDropdownFrame->GetView();
view->GetViewManager()->SetViewVisibility(view, nsViewVisibility_kHide);
NS_DispatchToCurrentThread(new nsAsyncRollup(this));
}
return eDropDownPositionSuppressed;
}
LogicalSize dropdownSize = mDropdownFrame->GetLogicalSize(wm);
nscoord bSize = std::max(before, after);
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame);
if (bSize < dropdownSize.BSize(wm)) {
if (lcf->GetNumDisplayRows() > 1) {
// The drop-down doesn't fit and currently shows more than 1 row -
// schedule a resize to show fewer rows.
NS_DispatchToCurrentThread(new nsAsyncResize(this));
return eDropDownPositionPendingResize;
}
} else if (bSize > (dropdownSize.BSize(wm) + lcf->GetBSizeOfARow() * 1.5) &&
lcf->GetDropdownCanGrow()) {
// The drop-down fits but there is room for at least 1.5 more rows -
// schedule a resize to show more rows if it has more rows to show.
// (1.5 rows for good measure to avoid any rounding issues that would
// lead to a loop of reflow requests)
NS_DispatchToCurrentThread(new nsAsyncResize(this));
return eDropDownPositionPendingResize;
}
// Position the drop-down after if there is room, otherwise place it before
// if there is room. If there is no room for it on either side then place
// it after (to avoid overlapping UI like the URL bar).
bool b = dropdownSize.BSize(wm) <= after || dropdownSize.BSize(wm) > before;
LogicalPoint dropdownPosition(wm, 0, b ? BSize(wm) : -dropdownSize.BSize(wm));
// Don't position the view unless the position changed since it might cause
// a call to NotifyGeometryChange() and an infinite loop here.
nsSize containerSize = GetSize();
const LogicalPoint currentPos =
mDropdownFrame->GetLogicalPosition(containerSize);
const LogicalPoint newPos = dropdownPosition + translation;
if (currentPos != newPos) {
mDropdownFrame->SetPosition(wm, newPos, containerSize);
nsContainerFrame::PositionFrameView(mDropdownFrame);
}
return eDropDownPositionFinal;
}
void nsComboboxControlFrame::NotifyGeometryChange() {
if (XRE_IsContentProcess()) {
return;
}
// We don't need to resize if we're not dropped down since ShowDropDown
// does that, or if we're dirty then the reflow callback does it,
// or if we have a delayed ShowDropDown pending.
if (IsDroppedDown() && !(GetStateBits() & NS_FRAME_IS_DIRTY) &&
!mDelayedShowDropDown) {
// Async because we're likely in a middle of a scroll here so
// frame/view positions are in flux.
RefPtr<nsResizeDropdownAtFinalPosition> resize =
new nsResizeDropdownAtFinalPosition(this);
NS_DispatchToCurrentThread(resize);
}
}
//----------------------------------------------------------
//
//----------------------------------------------------------
#ifdef DO_REFLOW_DEBUG
static int myCounter = 0;
static void printSize(char* aDesc, nscoord aSize) {
printf(" %s: ", aDesc);
if (aSize == NS_UNCONSTRAINEDSIZE) {
printf("UC");
} else {
printf("%d", PX(aSize));
}
}
#endif
//-------------------------------------------------------------------
//-- Main Reflow for the Combobox
//-------------------------------------------------------------------
bool nsComboboxControlFrame::HasDropDownButton() const {
const nsStyleDisplay* disp = StyleDisplay();
return disp->mAppearance == StyleAppearance::Menulist &&
(!IsThemed(disp) ||
PresContext()->GetTheme()->ThemeNeedsComboboxDropmarker());
}
nscoord nsComboboxControlFrame::GetIntrinsicISize(
gfxContext* aRenderingContext, nsLayoutUtils::IntrinsicISizeType aType) {
// get the scrollbar width, we'll use this later
nscoord scrollbarWidth = 0;
nsPresContext* presContext = PresContext();
if (mListControlFrame) {
nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame);
NS_ASSERTION(scrollable, "List must be a scrollable frame");
scrollbarWidth = scrollable->GetNondisappearingScrollbarWidth(
presContext, aRenderingContext, GetWritingMode());
}
const bool isContainSize = StyleDisplay()->IsContainSize();
nscoord displayISize = 0;
if (MOZ_LIKELY(mDisplayFrame)) {
if (isContainSize) {
// Get padding from the inline-axis
displayISize = mDisplayFrame->IntrinsicISizeOffsets().padding;
} else {
displayISize = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
mDisplayFrame, aType);
}
}
if (mDropdownFrame) {
nscoord dropdownContentISize;
bool isUsingOverlayScrollbars =
LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars) != 0;
if (aType == nsLayoutUtils::MIN_ISIZE) {
dropdownContentISize =
isContainSize ? 0 : mDropdownFrame->GetMinISize(aRenderingContext);
if (isUsingOverlayScrollbars) {
dropdownContentISize += scrollbarWidth;
}
} else {
NS_ASSERTION(aType == nsLayoutUtils::PREF_ISIZE, "Unexpected type");
dropdownContentISize =
isContainSize ? 0 : mDropdownFrame->GetPrefISize(aRenderingContext);
if (isUsingOverlayScrollbars) {
dropdownContentISize += scrollbarWidth;
}
}
dropdownContentISize = NSCoordSaturatingSubtract(
dropdownContentISize, scrollbarWidth, nscoord_MAX);
displayISize = std::max(dropdownContentISize, displayISize);
}
// add room for the dropmarker button if there is one
if (HasDropDownButton()) {
displayISize += scrollbarWidth;
}
return displayISize;
}
nscoord nsComboboxControlFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord minISize;
DISPLAY_MIN_INLINE_SIZE(this, minISize);
minISize = GetIntrinsicISize(aRenderingContext, nsLayoutUtils::MIN_ISIZE);
return minISize;
}
nscoord nsComboboxControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
nscoord prefISize;
DISPLAY_PREF_INLINE_SIZE(this, prefISize);
prefISize = GetIntrinsicISize(aRenderingContext, nsLayoutUtils::PREF_ISIZE);
return prefISize;
}
void nsComboboxControlFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
// Constraints we try to satisfy:
// 1) Default inline size of button is the vertical scrollbar size
// 2) If the inline size of button is bigger than our inline size, set
// inline size of button to 0.
// 3) Default block size of button is block size of display area
// 4) Inline size of display area is whatever is left over from our
// inline size after allocating inline size for the button.
// 5) Block Size of display area is GetBSizeOfARow() on the
// mListControlFrame.
if (!mDisplayFrame || !mButtonFrame || !mDropdownFrame) {
NS_ERROR("Why did the frame constructor allow this to happen? Fix it!!");
return;
}
// Make sure the displayed text is the same as the selected option,
// bug 297389.
if (!mDroppedDown) {
mDisplayedIndex = mListControlFrame->GetSelectedIndex();
}
// In dropped down mode the "selected index" is the hovered menu item,
// we want the last selected item which is |mDisplayedIndex| in this case.
RedisplayText();
// First reflow our dropdown so that we know how tall we should be.
ReflowDropdown(aPresContext, aReflowInput);
RefPtr<nsResizeDropdownAtFinalPosition> resize =
new nsResizeDropdownAtFinalPosition(this);
if (NS_SUCCEEDED(aPresContext->PresShell()->PostReflowCallback(resize))) {
// The reflow callback queue doesn't AddRef so we keep it alive until
// it's released in its ReflowFinished / ReflowCallbackCanceled.
Unused << resize.forget();
}
// Get the width of the vertical scrollbar. That will be the inline
// size of the dropdown button.
WritingMode wm = aReflowInput.GetWritingMode();
nscoord buttonISize;
if (!HasDropDownButton()) {
buttonISize = 0;
} else {
nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame);
NS_ASSERTION(scrollable, "List must be a scrollable frame");
buttonISize = scrollable->GetNondisappearingScrollbarWidth(
PresContext(), aReflowInput.mRenderingContext, wm);
if (buttonISize > aReflowInput.ComputedISize()) {
buttonISize = 0;
}
}
mDisplayISize = aReflowInput.ComputedISize() - buttonISize;
mMaxDisplayISize =
mDisplayISize + aReflowInput.ComputedLogicalPadding().IEnd(wm);
nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus);
// The button should occupy the same space as a scrollbar
nsSize containerSize = aDesiredSize.PhysicalSize();
LogicalRect buttonRect = mButtonFrame->GetLogicalRect(containerSize);
buttonRect.IStart(wm) =
aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm) +
mDisplayISize -
(aReflowInput.ComputedLogicalBorderPadding().IEnd(wm) -
aReflowInput.ComputedLogicalPadding().IEnd(wm));
buttonRect.ISize(wm) = buttonISize;
buttonRect.BStart(wm) = this->GetLogicalUsedBorder(wm).BStart(wm);
buttonRect.BSize(wm) =
mDisplayFrame->BSize(wm) + this->GetLogicalUsedPadding(wm).BStartEnd(wm);
mButtonFrame->SetRect(buttonRect, containerSize);
if (!aStatus.IsInlineBreakBefore() && !aStatus.IsFullyComplete()) {
// This frame didn't fit inside a fragmentation container. Splitting
// a nsComboboxControlFrame makes no sense, so we override the status here.
aStatus.Reset();
}
}
//--------------------------------------------------------------
#ifdef DEBUG_FRAME_DUMP
nsresult nsComboboxControlFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(NS_LITERAL_STRING("ComboboxControl"), aResult);
}
#endif
void nsComboboxControlFrame::ShowDropDown(bool aDoDropDown) {
MOZ_ASSERT(!XRE_IsContentProcess());
mDelayedShowDropDown = false;
EventStates eventStates = mContent->AsElement()->State();
if (aDoDropDown && eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
return;
}
if (!mDroppedDown && aDoDropDown) {
nsFocusManager* fm = nsFocusManager::GetFocusManager();
if (!fm || fm->GetFocusedElement() == GetContent()) {
DropDownPositionState state = AbsolutelyPositionDropDown();
if (state == eDropDownPositionFinal) {
ShowList(aDoDropDown); // might destroy us
} else if (state == eDropDownPositionPendingResize) {
// Delay until after the resize reflow, see nsAsyncResize.
mDelayedShowDropDown = true;
}
} else {
// Delay until we get focus, see SetFocus().
mDelayedShowDropDown = true;
}
} else if (mDroppedDown && !aDoDropDown) {
ShowList(aDoDropDown); // might destroy us
}
}
void nsComboboxControlFrame::SetDropDown(nsIFrame* aDropDownFrame) {
mDropdownFrame = aDropDownFrame;
mListControlFrame = do_QueryFrame(mDropdownFrame);
if (!sFocused && nsContentUtils::IsFocusedContent(GetContent())) {
sFocused = this;
nsListControlFrame::ComboboxFocusSet();
}
}
nsIFrame* nsComboboxControlFrame::GetDropDown() { return mDropdownFrame; }
///////////////////////////////////////////////////////////////
nsresult nsComboboxControlFrame::RedisplaySelectedText() {
nsAutoScriptBlocker scriptBlocker;
mDisplayedIndex = mListControlFrame->GetSelectedIndex();
return RedisplayText();
}
nsresult nsComboboxControlFrame::RedisplayText() {
nsString previewValue;
nsString previousText(mDisplayedOptionTextOrPreview);
auto* selectElement = static_cast<dom::HTMLSelectElement*>(GetContent());
selectElement->GetPreviewValue(previewValue);
// Get the text to display
if (!previewValue.IsEmpty()) {
mDisplayedOptionTextOrPreview = previewValue;
} else if (mDisplayedIndex != -1) {
mListControlFrame->GetOptionText(mDisplayedIndex,
mDisplayedOptionTextOrPreview);
} else {
mDisplayedOptionTextOrPreview.Truncate();
}
REFLOW_DEBUG_MSG2(
"RedisplayText \"%s\"\n",
NS_LossyConvertUTF16toASCII(mDisplayedOptionTextOrPreview).get());
// Send reflow command because the new text maybe larger
nsresult rv = NS_OK;
if (mDisplayContent && !previousText.Equals(mDisplayedOptionTextOrPreview)) {
// Don't call ActuallyDisplayText(true) directly here since that
// could cause recursive frame construction. See bug 283117 and the comment
// in HandleRedisplayTextEvent() below.
// Revoke outstanding events to avoid out-of-order events which could mean
// displaying the wrong text.
mRedisplayTextEvent.Revoke();
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"If we happen to run our redisplay event now, we might kill "
"ourselves!");
mRedisplayTextEvent = new RedisplayTextEvent(this);
nsContentUtils::AddScriptRunner(mRedisplayTextEvent.get());
}
return rv;
}
void nsComboboxControlFrame::HandleRedisplayTextEvent() {
// First, make sure that the content model is up to date and we've
// constructed the frames for all our content in the right places.
// Otherwise they'll end up under the wrong insertion frame when we
// ActuallyDisplayText, since that flushes out the content sink by
// calling SetText on a DOM node with aNotify set to true. See bug
// 289730.
AutoWeakFrame weakThis(this);
PresContext()->Document()->FlushPendingNotifications(
FlushType::ContentAndNotify);
if (!weakThis.IsAlive()) return;
// Redirect frame insertions during this method (see
// GetContentInsertionFrame()) so that any reframing that the frame
// constructor forces upon us is inserted into the correct parent
// (mDisplayFrame). See bug 282607.
MOZ_ASSERT(!mInRedisplayText, "Nested RedisplayText");
mInRedisplayText = true;
mRedisplayTextEvent.Forget();
ActuallyDisplayText(true);
if (!weakThis.IsAlive()) {
return;
}
// XXXbz This should perhaps be eResize. Check.
PresShell()->FrameNeedsReflow(mDisplayFrame, IntrinsicDirty::StyleChange,
NS_FRAME_IS_DIRTY);
mInRedisplayText = false;
}
void nsComboboxControlFrame::ActuallyDisplayText(bool aNotify) {
RefPtr<nsTextNode> displayContent = mDisplayContent;
if (mDisplayedOptionTextOrPreview.IsEmpty()) {
// Have to use a space character of some sort for line-block-size
// calculations to be right. Also, the space character must be zero-width
// in order for the the inline-size calculations to be consistent between
// size-contained comboboxes vs. empty comboboxes.
//
// XXXdholbert Does this space need to be "non-breaking"? I'm not sure
// if it matters, but we previously had a comment here (added in 2002)
// saying "Have to use a non-breaking space for line-height calculations
// to be right". So I'll stick with a non-breaking space for now...
static const char16_t space = 0xFEFF;
displayContent->SetText(&space, 1, aNotify);
} else {
displayContent->SetText(mDisplayedOptionTextOrPreview, aNotify);
}
}
int32_t nsComboboxControlFrame::GetIndexOfDisplayArea() {
return mDisplayedIndex;
}
//----------------------------------------------------------------------
// nsISelectControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::DoneAddingChildren(bool aIsDone) {
nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame);
if (!listFrame) return NS_ERROR_FAILURE;
return listFrame->DoneAddingChildren(aIsDone);
}
NS_IMETHODIMP
nsComboboxControlFrame::AddOption(int32_t aIndex) {
if (aIndex <= mDisplayedIndex) {
++mDisplayedIndex;
}
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame);
return lcf->AddOption(aIndex);
}
NS_IMETHODIMP
nsComboboxControlFrame::RemoveOption(int32_t aIndex) {
AutoWeakFrame weakThis(this);
if (mListControlFrame->GetNumberOfOptions() > 0) {
if (aIndex < mDisplayedIndex) {
--mDisplayedIndex;
} else if (aIndex == mDisplayedIndex) {
mDisplayedIndex = 0; // IE6 compat
RedisplayText();
}
} else {
// If we removed the last option, we need to blank things out
mDisplayedIndex = -1;
RedisplayText();
}
if (!weakThis.IsAlive()) return NS_OK;
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame);
return lcf->RemoveOption(aIndex);
}
NS_IMETHODIMP_(void)
nsComboboxControlFrame::OnSetSelectedIndex(int32_t aOldIndex,
int32_t aNewIndex) {
nsAutoScriptBlocker scriptBlocker;
mDisplayedIndex = aNewIndex;
RedisplayText();
NS_ASSERTION(mDropdownFrame, "No dropdown frame!");
nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame);
NS_ASSERTION(listFrame, "No list frame!");
return listFrame->OnSetSelectedIndex(aOldIndex, aNewIndex);
}
// End nsISelectControlFrame
//----------------------------------------------------------------------
nsresult nsComboboxControlFrame::HandleEvent(nsPresContext* aPresContext,
WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) {
NS_ENSURE_ARG_POINTER(aEventStatus);
if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
return NS_OK;
}
EventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
return NS_OK;
}
#if COMBOBOX_ROLLUP_CONSUME_EVENT == 0
if (aEvent->mMessage == eMouseDown) {
if (GetContent() == mozilla::widget::nsAutoRollup::GetLastRollup()) {
// This event did a Rollup on this control - prevent it from opening
// the dropdown again!
*aEventStatus = nsEventStatus_eConsumeNoDefault;
return NS_OK;
}
}
#endif
// If we have style that affects how we are selected, feed event down to
// nsFrame::HandleEvent so that selection takes place when appropriate.
if (IsContentDisabled()) {
return nsBlockFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
}
return NS_OK;
}
nsresult nsComboboxControlFrame::SetFormProperty(nsAtom* aName,
const nsAString& aValue) {
nsIFormControlFrame* fcFrame = do_QueryFrame(mDropdownFrame);
if (!fcFrame) {
return NS_NOINTERFACE;
}
return fcFrame->SetFormProperty(aName, aValue);
}
nsContainerFrame* nsComboboxControlFrame::GetContentInsertionFrame() {
return mInRedisplayText ? mDisplayFrame
: mDropdownFrame->GetContentInsertionFrame();
}
void nsComboboxControlFrame::AppendDirectlyOwnedAnonBoxes(
nsTArray<OwnedAnonBox>& aResult) {
aResult.AppendElement(OwnedAnonBox(mDropdownFrame));
aResult.AppendElement(OwnedAnonBox(mDisplayFrame));
}
nsresult nsComboboxControlFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
// The frames used to display the combo box and the button used to popup the
// dropdown list are created through anonymous content. The dropdown list is
// not created through anonymous content because its frame is initialized
// specifically for the drop-down case and it is placed a special list
// referenced through NS_COMBO_FRAME_POPUP_LIST_INDEX to keep separate from
// the layout of the display and button.
//
// Note: The value attribute of the display content is set when an item is
// selected in the dropdown list. If the content specified below does not
// honor the value attribute than nothing will be displayed.
// For now the content that is created corresponds to two input buttons. It
// would be better to create the tag as something other than input, but then
// there isn't any way to create a button frame since it isn't possible to set
// the display type in CSS2 to create a button frame.
// create content used for display
// nsAtom* tag = NS_Atomize("mozcombodisplay");
// Add a child text content node for the label
nsNodeInfoManager* nimgr = mContent->NodeInfo()->NodeInfoManager();
mDisplayContent = new nsTextNode(nimgr);
// set the value of the text node
mDisplayedIndex = mListControlFrame->GetSelectedIndex();
if (mDisplayedIndex != -1) {
mListControlFrame->GetOptionText(mDisplayedIndex,
mDisplayedOptionTextOrPreview);
}
ActuallyDisplayText(false);
if (!aElements.AppendElement(mDisplayContent)) return NS_ERROR_OUT_OF_MEMORY;
mButtonContent = mContent->OwnerDoc()->CreateHTMLElement(nsGkAtoms::button);
if (!mButtonContent) return NS_ERROR_OUT_OF_MEMORY;
// make someone to listen to the button. If its pressed by someone like
// Accessibility then open or close the combo box.
mButtonListener = new nsComboButtonListener(this);
mButtonContent->AddEventListener(NS_LITERAL_STRING("click"), mButtonListener,
false, false);
mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::type,
NS_LITERAL_STRING("button"), false);
// Set tabindex="-1" so that the button is not tabbable
mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::tabindex,
NS_LITERAL_STRING("-1"), false);
WritingMode wm = GetWritingMode();
if (wm.IsVertical()) {
mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::orientation,
wm.IsVerticalRL() ? NS_LITERAL_STRING("left")
: NS_LITERAL_STRING("right"),
false);
}
if (!aElements.AppendElement(mButtonContent)) return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
void nsComboboxControlFrame::AppendAnonymousContentTo(
nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
if (mDisplayContent) {
aElements.AppendElement(mDisplayContent);
}
if (mButtonContent) {
aElements.AppendElement(mButtonContent);
}
}
nsIContent* nsComboboxControlFrame::GetDisplayNode() const {
return mDisplayContent;
}
// XXXbz this is a for-now hack. Now that display:inline-block works,
// need to revisit this.
class nsComboboxDisplayFrame final : public nsBlockFrame {
public:
NS_DECL_FRAMEARENA_HELPERS(nsComboboxDisplayFrame)
nsComboboxDisplayFrame(ComputedStyle* aStyle,
nsComboboxControlFrame* aComboBox)
: nsBlockFrame(aStyle, aComboBox->PresContext(), kClassID),
mComboBox(aComboBox) {}
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(NS_LITERAL_STRING("ComboboxDisplay"), aResult);
}
#endif
virtual bool IsFrameOfType(uint32_t aFlags) const override {
return nsBlockFrame::IsFrameOfType(aFlags &
~(nsIFrame::eReplacedContainsBlock));
}
virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
protected:
nsComboboxControlFrame* mComboBox;
};
NS_IMPL_FRAMEARENA_HELPERS(nsComboboxDisplayFrame)
void nsComboboxDisplayFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
ReflowInput state(aReflowInput);
WritingMode wm = aReflowInput.GetWritingMode();
LogicalMargin bp = state.ComputedLogicalBorderPadding();
if (state.ComputedBSize() == NS_UNCONSTRAINEDSIZE) {
float inflation = nsLayoutUtils::FontSizeInflationFor(mComboBox);
// We intentionally use the combobox frame's style here, which has
// the 'line-height' specified by the author, if any.
// (This frame has 'line-height: -moz-block-height' in the UA
// sheet which is suitable when there's a specified block-size.)
nscoord lh = ReflowInput::CalcLineHeight(mComboBox->GetContent(),
mComboBox->Style(), aPresContext,
NS_UNCONSTRAINEDSIZE, inflation);
if (!mComboBox->StyleText()->mLineHeight.IsNormal()) {
// If the author specified a different line-height than normal, or a
// different appearance, subtract the border-padding from the
// comboboxdisplay frame, so as to respect that line-height rather than
// that line-height + 2px (from the UA sheet).
lh = std::max(0, lh - bp.BStartEnd(wm));
}
state.SetComputedBSize(lh);
}
nscoord inlineBp = bp.IStartEnd(wm);
nscoord computedISize = mComboBox->mDisplayISize - inlineBp;
// Other UAs ignore padding in some (but not all) platforms for (themed only)
// comboboxes. Instead of doing that, we prevent that padding if present from
// clipping the display text, by enforcing the display text minimum size in
// that situation.
const bool shouldHonorMinISize =
mComboBox->StyleDisplay()->mAppearance == StyleAppearance::Menulist;
if (shouldHonorMinISize) {
computedISize = std::max(state.ComputedMinISize(), computedISize);
// Don't let this size go over mMaxDisplayISize, since that'd be
// observable via clientWidth / scrollWidth.
computedISize =
std::min(computedISize, mComboBox->mMaxDisplayISize - inlineBp);
}
state.SetComputedISize(std::max(0, computedISize));
nsBlockFrame::Reflow(aPresContext, aDesiredSize, state, aStatus);
aStatus.Reset(); // this type of frame can't be split
}
void nsComboboxDisplayFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
nsDisplayListCollection set(aBuilder);
nsBlockFrame::BuildDisplayList(aBuilder, set);
// remove background items if parent frame is themed
if (mComboBox->IsThemed()) {
set.BorderBackground()->DeleteAll(aBuilder);
}
set.MoveTo(aLists);
}
nsIFrame* nsComboboxControlFrame::CreateFrameForDisplayNode() {
MOZ_ASSERT(mDisplayContent);
// Get PresShell
mozilla::PresShell* presShell = PresShell();
ServoStyleSet* styleSet = presShell->StyleSet();
// create the ComputedStyle for the anonymous block frame and text frame
RefPtr<ComputedStyle> computedStyle;
computedStyle = styleSet->ResolveInheritingAnonymousBoxStyle(
PseudoStyleType::mozDisplayComboboxControlFrame, mComputedStyle);
RefPtr<ComputedStyle> textComputedStyle;
textComputedStyle =
styleSet->ResolveStyleForText(mDisplayContent, mComputedStyle);
// Start by creating our anonymous block frame
mDisplayFrame = new (presShell) nsComboboxDisplayFrame(computedStyle, this);
mDisplayFrame->Init(mContent, this, nullptr);
// Create a text frame and put it inside the block frame
nsIFrame* textFrame = NS_NewTextFrame(presShell, textComputedStyle);
// initialize the text frame
textFrame->Init(mDisplayContent, mDisplayFrame, nullptr);
mDisplayContent->SetPrimaryFrame(textFrame);
nsFrameList textList(textFrame, textFrame);
mDisplayFrame->SetInitialChildList(kPrincipalList, textList);
return mDisplayFrame;
}
void nsComboboxControlFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (sFocused == this) {
sFocused = nullptr;
}
// Revoke any pending RedisplayTextEvent
mRedisplayTextEvent.Revoke();
nsCheckboxRadioFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
if (mDroppedDown) {
MOZ_ASSERT(mDropdownFrame, "mDroppedDown without frame");
nsView* view = mDropdownFrame->GetView();
MOZ_ASSERT(view);
nsIWidget* widget = view->GetWidget();
if (widget) {
widget->CaptureRollupEvents(this, false);
}
}
// Cleanup frames in popup child list
mPopupFrames.DestroyFramesFrom(aDestructRoot, aPostDestroyData);
aPostDestroyData.AddAnonymousContent(mDisplayContent.forget());
aPostDestroyData.AddAnonymousContent(mButtonContent.forget());
nsBlockFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
const nsFrameList& nsComboboxControlFrame::GetChildList(
ChildListID aListID) const {
if (kSelectPopupList == aListID) {
return mPopupFrames;
}
return nsBlockFrame::GetChildList(aListID);
}
void nsComboboxControlFrame::GetChildLists(nsTArray<ChildList>* aLists) const {
nsBlockFrame::GetChildLists(aLists);
mPopupFrames.AppendIfNonempty(aLists, kSelectPopupList);
}
void nsComboboxControlFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
#ifdef DEBUG
for (nsIFrame* f : aChildList) {
MOZ_ASSERT(f->GetParent() == this, "Unexpected parent");
}
#endif
if (kSelectPopupList == aListID) {
mPopupFrames.SetFrames(aChildList);
} else {
for (nsFrameList::Enumerator e(aChildList); !e.AtEnd(); e.Next()) {
nsCOMPtr<nsIFormControl> formControl =
do_QueryInterface(e.get()->GetContent());
if (formControl && formControl->ControlType() == NS_FORM_BUTTON_BUTTON) {
mButtonFrame = e.get();
break;
}
}
NS_ASSERTION(mButtonFrame, "missing button frame in initial child list");
nsBlockFrame::SetInitialChildList(aListID, aChildList);
}
}
//----------------------------------------------------------------------
// nsIRollupListener
//----------------------------------------------------------------------
bool nsComboboxControlFrame::Rollup(uint32_t aCount, bool aFlush,
const nsIntPoint* pos,
nsIContent** aLastRolledUp) {
if (aLastRolledUp) {
*aLastRolledUp = nullptr;
}
if (!mDroppedDown) {
return false;
}
bool consume = !!COMBOBOX_ROLLUP_CONSUME_EVENT;
AutoWeakFrame weakFrame(this);
mListControlFrame->AboutToRollup(); // might destroy us
if (!weakFrame.IsAlive()) {
return consume;
}
ShowDropDown(false); // might destroy us
if (weakFrame.IsAlive()) {
mListControlFrame->CaptureMouseEvents(false);
}
if (aFlush && weakFrame.IsAlive()) {
// The popup's visibility doesn't update until the minimize animation has
// finished, so call UpdateWidgetGeometry to update it right away.
RefPtr<nsViewManager> viewManager =
mDropdownFrame->GetView()->GetViewManager();
viewManager->UpdateWidgetGeometry(); // might destroy us
}
if (!weakFrame.IsAlive()) {
return consume;
}
if (aLastRolledUp) {
*aLastRolledUp = GetContent();
}
return consume;
}
nsIWidget* nsComboboxControlFrame::GetRollupWidget() {
nsView* view = mDropdownFrame->GetView();
MOZ_ASSERT(view);
return view->GetWidget();
}
void nsComboboxControlFrame::RollupFromList() {
if (ShowList(false)) mListControlFrame->CaptureMouseEvents(false);
}
int32_t nsComboboxControlFrame::UpdateRecentIndex(int32_t aIndex) {
int32_t index = mRecentSelectedIndex;
if (mRecentSelectedIndex == NS_SKIP_NOTIFY_INDEX ||
aIndex == NS_SKIP_NOTIFY_INDEX)
mRecentSelectedIndex = aIndex;
return index;
}
class nsDisplayComboboxFocus : public nsPaintedDisplayItem {
public:
nsDisplayComboboxFocus(nsDisplayListBuilder* aBuilder,
nsComboboxControlFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayComboboxFocus);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayComboboxFocus() { MOZ_COUNT_DTOR(nsDisplayComboboxFocus); }
#endif
virtual void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
NS_DISPLAY_DECL_NAME("ComboboxFocus", TYPE_COMBOBOX_FOCUS)
};
void nsDisplayComboboxFocus::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) {
static_cast<nsComboboxControlFrame*>(mFrame)->PaintFocus(
*aCtx->GetDrawTarget(), ToReferenceFrame());
}
void nsComboboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (aBuilder->IsForEventDelivery()) {
// Don't allow children to receive events.
// REVIEW: following old GetFrameForPoint
DisplayBorderBackgroundOutline(aBuilder, aLists);
} else {
// REVIEW: Our in-flow child frames are inline-level so they will paint in
// our content list, so we don't need to mess with layers.
nsBlockFrame::BuildDisplayList(aBuilder, aLists);
}
// draw a focus indicator only when focus rings should be drawn
if (Document* doc = mContent->GetComposedDoc()) {
nsPIDOMWindowOuter* window = doc->GetWindow();
if (window && window->ShouldShowFocusRing()) {
nsPresContext* presContext = PresContext();
const nsStyleDisplay* disp = StyleDisplay();
if ((!IsThemed(disp) ||
!presContext->GetTheme()->ThemeDrawsFocusForWidget(
disp->mAppearance)) &&
mDisplayFrame && IsVisibleForPainting()) {
aLists.Content()->AppendNewToTop<nsDisplayComboboxFocus>(aBuilder,
this);
}
}
}
DisplaySelectionOverlay(aBuilder, aLists.Content());
}
void nsComboboxControlFrame::PaintFocus(DrawTarget& aDrawTarget, nsPoint aPt) {
/* Do we need to do anything? */
EventStates eventStates = mContent->AsElement()->State();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED) || sFocused != this) return;
int32_t appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel();
nsRect clipRect = mDisplayFrame->GetRect() + aPt;
aDrawTarget.PushClipRect(
NSRectToSnappedRect(clipRect, appUnitsPerDevPixel, aDrawTarget));
// REVIEW: Why does the old code paint mDisplayFrame again? We've
// already painted it in the children above. So clipping it here won't do
// us much good.
/////////////////////
// draw focus
StrokeOptions strokeOptions;
nsLayoutUtils::InitDashPattern(strokeOptions, StyleBorderStyle::Dotted);
ColorPattern color(ToDeviceColor(StyleText()->mColor));
nscoord onePixel = nsPresContext::CSSPixelsToAppUnits(1);
clipRect.width -= onePixel;
clipRect.height -= onePixel;
Rect r = ToRect(nsLayoutUtils::RectToGfxRect(clipRect, appUnitsPerDevPixel));
StrokeSnappedEdgesOfRect(r, aDrawTarget, color, strokeOptions);
aDrawTarget.PopClip();
}
//---------------------------------------------------------
// gets the content (an option) by index and then set it as
// being selected or not selected
//---------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::OnOptionSelected(int32_t aIndex, bool aSelected) {
if (mDroppedDown) {
nsISelectControlFrame* selectFrame = do_QueryFrame(mListControlFrame);
if (selectFrame) {
selectFrame->OnOptionSelected(aIndex, aSelected);
}
} else {
if (aSelected) {
nsAutoScriptBlocker blocker;
mDisplayedIndex = aIndex;
RedisplayText();
} else {
AutoWeakFrame weakFrame(this);
RedisplaySelectedText();
if (weakFrame.IsAlive()) {
FireValueChangeEvent(); // Fire after old option is unselected
}
}
}
return NS_OK;
}
void nsComboboxControlFrame::FireValueChangeEvent() {
// Fire ValueChange event to indicate data value of combo box has changed
nsContentUtils::AddScriptRunner(
new AsyncEventDispatcher(mContent, NS_LITERAL_STRING("ValueChange"),
CanBubble::eYes, ChromeOnlyDispatch::eNo));
}
void nsComboboxControlFrame::OnContentReset() {
if (mListControlFrame) {
mListControlFrame->OnContentReset();
}
}
//--------------------------------------------------------
// nsIStatefulFrame
//--------------------------------------------------------
UniquePtr<PresState> nsComboboxControlFrame::SaveState() {
UniquePtr<PresState> state = NewPresState();
state->droppedDown() = mDroppedDown;
return state;
}
NS_IMETHODIMP
nsComboboxControlFrame::RestoreState(PresState* aState) {
if (!aState) {
return NS_ERROR_FAILURE;
}
ShowList(aState->droppedDown()); // might destroy us
return NS_OK;
}
// Append a suffix so that the state key for the combobox is different
// from the state key the list control uses to sometimes save the scroll
// position for the same Element
void nsComboboxControlFrame::GenerateStateKey(nsIContent* aContent,
Document* aDocument,
nsACString& aKey) {
nsContentUtils::GenerateStateKey(aContent, aDocument, aKey);
if (aKey.IsEmpty()) {
return;
}
aKey.AppendLiteral("CCF");
}
// Fennec uses a custom combobox built-in widget.
//
/* static */
bool nsComboboxControlFrame::ToolkitHasNativePopup() {
#ifdef MOZ_USE_NATIVE_POPUP_WINDOWS
return true;
#else
return false;
#endif /* MOZ_USE_NATIVE_POPUP_WINDOWS */
}
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