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-rw-r--r--layout/forms/nsComboboxControlFrame.cpp965
1 files changed, 965 insertions, 0 deletions
diff --git a/layout/forms/nsComboboxControlFrame.cpp b/layout/forms/nsComboboxControlFrame.cpp
new file mode 100644
index 0000000000..a935e3c761
--- /dev/null
+++ b/layout/forms/nsComboboxControlFrame.cpp
@@ -0,0 +1,965 @@
+/* -*- 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 "nsDeviceContext.h"
+#include "nsFocusManager.h"
+#include "nsCheckboxRadioFrame.h"
+#include "nsGkAtoms.h"
+#include "nsCSSAnonBoxes.h"
+#include "nsHTMLParts.h"
+#include "nsIFormControl.h"
+#include "nsILayoutHistoryState.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 "nsTextFrameUtils.h"
+#include "nsTextRunTransformations.h"
+#include "HTMLSelectEventListener.h"
+#include "mozilla/Likely.h"
+#include <algorithm>
+#include "nsTextNode.h"
+#include "mozilla/AsyncEventDispatcher.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"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+NS_IMETHODIMP
+nsComboboxControlFrame::RedisplayTextEvent::Run() {
+ if (mControlFrame) mControlFrame->HandleRedisplayTextEvent();
+ return NS_OK;
+}
+
+// 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.
+
+nsComboboxControlFrame* NS_NewComboboxControlFrame(PresShell* aPresShell,
+ ComputedStyle* aStyle) {
+ nsComboboxControlFrame* it = new (aPresShell)
+ nsComboboxControlFrame(aStyle, aPresShell->GetPresContext());
+ 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),
+ mDisplayISize(0),
+ mMaxDisplayISize(0),
+ mRecentSelectedIndex(NS_SKIP_NOTIFY_INDEX),
+ mDisplayedIndex(-1),
+ mInRedisplayText(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_TAIL_INHERITING(nsBlockFrame)
+
+#ifdef ACCESSIBILITY
+a11y::AccType nsComboboxControlFrame::AccessibleType() {
+ return a11y::eHTMLComboboxType;
+}
+#endif
+
+void nsComboboxControlFrame::SetFocus(bool aOn, bool aRepaint) {
+ // This is needed on a temporary basis. It causes the focus
+ // rect to be drawn. This is much faster than ReResolvingStyle
+ // Bug 32920
+ InvalidateFrame();
+}
+
+nsPoint nsComboboxControlFrame::GetCSSTransformTranslation() {
+ nsIFrame* frame = this;
+ bool is3DTransform = false;
+ Matrix transform;
+ while (frame) {
+ nsIFrame* parent;
+ Matrix4x4Flagged ctm = frame->GetTransformMatrix(
+ ViewportType::Layout, RelativeTo{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;
+}
+
+//----------------------------------------------------------
+//
+//----------------------------------------------------------
+#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();
+ // FIXME(emilio): Blink also shows this for menulist-button and such... Seems
+ // more similar to our mac / linux implementation.
+ return disp->EffectiveAppearance() == StyleAppearance::Menulist &&
+ (!IsThemed(disp) ||
+ PresContext()->Theme()->ThemeNeedsComboboxDropmarker());
+}
+
+nscoord nsComboboxControlFrame::DropDownButtonISize() {
+ if (!HasDropDownButton()) {
+ return 0;
+ }
+
+ nsPresContext* pc = PresContext();
+ LayoutDeviceIntSize dropdownButtonSize = pc->Theme()->GetMinimumWidgetSize(
+ pc, this, StyleAppearance::MozMenulistArrowButton);
+ return pc->DevPixelsToAppUnits(dropdownButtonSize.width);
+}
+
+int32_t nsComboboxControlFrame::CharCountOfLargestOptionForInflation() const {
+ uint32_t maxLength = 0;
+ nsAutoString label;
+ for (auto i : IntegerRange(Select().Options()->Length())) {
+ GetOptionText(i, label);
+ maxLength = std::max(
+ maxLength,
+ nsTextFrameUtils::ComputeApproximateLengthWithWhitespaceCompression(
+ label, StyleText()));
+ }
+ if (MOZ_UNLIKELY(maxLength > uint32_t(INT32_MAX))) {
+ return INT32_MAX;
+ }
+ return int32_t(maxLength);
+}
+
+nscoord nsComboboxControlFrame::GetLongestOptionISize(
+ gfxContext* aRenderingContext) const {
+ // Compute the width of each option's (potentially text-transformed) text,
+ // and use the widest one as part of our intrinsic size.
+ nscoord maxOptionSize = 0;
+ nsAutoString label;
+ nsAutoString transformedLabel;
+ RefPtr<nsFontMetrics> fm =
+ nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
+ const nsStyleText* textStyle = StyleText();
+ auto textTransform = textStyle->mTextTransform.IsNone()
+ ? Nothing()
+ : Some(textStyle->mTextTransform);
+ nsAtom* language = StyleFont()->mLanguage;
+ AutoTArray<bool, 50> charsToMergeArray;
+ AutoTArray<bool, 50> deletedCharsArray;
+ for (auto i : IntegerRange(Select().Options()->Length())) {
+ GetOptionText(i, label);
+ const nsAutoString* stringToUse = &label;
+ if (textTransform ||
+ textStyle->mWebkitTextSecurity != StyleTextSecurity::None) {
+ transformedLabel.Truncate();
+ charsToMergeArray.SetLengthAndRetainStorage(0);
+ deletedCharsArray.SetLengthAndRetainStorage(0);
+ nsCaseTransformTextRunFactory::TransformString(
+ label, transformedLabel, textTransform,
+ textStyle->TextSecurityMaskChar(),
+ /* aCaseTransformsOnly = */ false, language, charsToMergeArray,
+ deletedCharsArray);
+ stringToUse = &transformedLabel;
+ }
+ maxOptionSize = std::max(maxOptionSize,
+ nsLayoutUtils::AppUnitWidthOfStringBidi(
+ *stringToUse, this, *fm, *aRenderingContext));
+ }
+ if (maxOptionSize) {
+ // HACK: Add one app unit to workaround silly Netgear router styling, see
+ // bug 1769580. In practice since this comes from font metrics is unlikely
+ // to be perceivable.
+ maxOptionSize += 1;
+ }
+ return maxOptionSize;
+}
+
+nscoord nsComboboxControlFrame::GetIntrinsicISize(gfxContext* aRenderingContext,
+ IntrinsicISizeType aType) {
+ Maybe<nscoord> containISize = ContainIntrinsicISize(NS_UNCONSTRAINEDSIZE);
+ if (containISize && *containISize != NS_UNCONSTRAINEDSIZE) {
+ return *containISize;
+ }
+
+ nscoord displayISize = mDisplayFrame->IntrinsicISizeOffsets().padding;
+ if (!containISize && !StyleContent()->mContent.IsNone()) {
+ displayISize += GetLongestOptionISize(aRenderingContext);
+ }
+
+ // Add room for the dropmarker button (if there is one).
+ displayISize += DropDownButtonISize();
+ return displayISize;
+}
+
+nscoord nsComboboxControlFrame::GetMinISize(gfxContext* aRenderingContext) {
+ nscoord minISize;
+ DISPLAY_MIN_INLINE_SIZE(this, minISize);
+ minISize = GetIntrinsicISize(aRenderingContext, IntrinsicISizeType::MinISize);
+ return minISize;
+}
+
+nscoord nsComboboxControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
+ nscoord prefISize;
+ DISPLAY_PREF_INLINE_SIZE(this, prefISize);
+ prefISize =
+ GetIntrinsicISize(aRenderingContext, IntrinsicISizeType::PrefISize);
+ return prefISize;
+}
+
+dom::HTMLSelectElement& nsComboboxControlFrame::Select() const {
+ return *static_cast<dom::HTMLSelectElement*>(GetContent());
+}
+
+void nsComboboxControlFrame::GetOptionText(uint32_t aIndex,
+ nsAString& aText) const {
+ aText.Truncate();
+ if (Element* el = Select().Options()->GetElementAt(aIndex)) {
+ static_cast<dom::HTMLOptionElement*>(el)->GetRenderedLabel(aText);
+ }
+}
+
+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.
+
+ if (!mDisplayFrame) {
+ 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.
+ mDisplayedIndex = Select().SelectedIndex();
+
+ // 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();
+
+ WritingMode wm = aReflowInput.GetWritingMode();
+
+ // Check if the theme specifies a minimum size for the dropdown button
+ // first.
+ const nscoord buttonISize = DropDownButtonISize();
+ const auto borderPadding = aReflowInput.ComputedLogicalBorderPadding(wm);
+ const auto padding = aReflowInput.ComputedLogicalPadding(wm);
+ const auto border = borderPadding - padding;
+
+ mDisplayISize = aReflowInput.ComputedISize() - buttonISize;
+ mMaxDisplayISize = mDisplayISize + padding.IEnd(wm);
+
+ nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowInput, aStatus);
+
+ // The button should occupy the same space as a scrollbar, and its position
+ // starts from the border edge.
+ if (mButtonFrame) {
+ LogicalRect buttonRect(wm);
+ buttonRect.IStart(wm) = borderPadding.IStart(wm) + mMaxDisplayISize;
+ buttonRect.BStart(wm) = border.BStart(wm);
+
+ buttonRect.ISize(wm) = buttonISize;
+ buttonRect.BSize(wm) = mDisplayFrame->BSize(wm) + padding.BStartEnd(wm);
+
+ const nsSize containerSize = aDesiredSize.PhysicalSize();
+ 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();
+ }
+}
+
+void nsComboboxControlFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) {
+ nsBlockFrame::Init(aContent, aParent, aPrevInFlow);
+
+ mEventListener = new HTMLSelectEventListener(
+ Select(), HTMLSelectEventListener::SelectType::Combobox);
+}
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult nsComboboxControlFrame::GetFrameName(nsAString& aResult) const {
+ return MakeFrameName(u"ComboboxControl"_ns, aResult);
+}
+#endif
+
+///////////////////////////////////////////////////////////////
+
+nsresult nsComboboxControlFrame::RedisplaySelectedText() {
+ nsAutoScriptBlocker scriptBlocker;
+ mDisplayedIndex = Select().SelectedIndex();
+ return RedisplayText();
+}
+
+nsresult nsComboboxControlFrame::RedisplayText() {
+ nsString previewValue;
+ nsString previousText(mDisplayedOptionTextOrPreview);
+
+ Select().GetPreviewValue(previewValue);
+ // Get the text to display
+ if (!previewValue.IsEmpty()) {
+ mDisplayedOptionTextOrPreview = previewValue;
+ } else if (mDisplayedIndex != -1 && !StyleContent()->mContent.IsNone()) {
+ 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 IntrinsicDirty::None. Check.
+ PresShell()->FrameNeedsReflow(mDisplayFrame,
+ IntrinsicDirty::FrameAncestorsAndDescendants,
+ 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;
+}
+
+bool nsComboboxControlFrame::IsDroppedDown() const {
+ return Select().OpenInParentProcess();
+}
+
+//----------------------------------------------------------------------
+// nsISelectControlFrame
+//----------------------------------------------------------------------
+NS_IMETHODIMP
+nsComboboxControlFrame::DoneAddingChildren(bool aIsDone) { return NS_OK; }
+
+NS_IMETHODIMP
+nsComboboxControlFrame::AddOption(int32_t aIndex) {
+ if (aIndex <= mDisplayedIndex) {
+ ++mDisplayedIndex;
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsComboboxControlFrame::RemoveOption(int32_t aIndex) {
+ if (Select().Options()->Length()) {
+ 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();
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP_(void)
+nsComboboxControlFrame::OnSetSelectedIndex(int32_t aOldIndex,
+ int32_t aNewIndex) {
+ nsAutoScriptBlocker scriptBlocker;
+ mDisplayedIndex = aNewIndex;
+ RedisplayText();
+}
+
+// End nsISelectControlFrame
+//----------------------------------------------------------------------
+
+nsresult nsComboboxControlFrame::HandleEvent(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus) {
+ NS_ENSURE_ARG_POINTER(aEventStatus);
+
+ if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
+ return NS_OK;
+ }
+
+ if (mContent->AsElement()->State().HasState(dom::ElementState::DISABLED)) {
+ return NS_OK;
+ }
+
+ // If we have style that affects how we are selected, feed event down to
+ // nsIFrame::HandleEvent so that selection takes place when appropriate.
+ if (IsContentDisabled()) {
+ return nsBlockFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
+ }
+ return NS_OK;
+}
+
+nsContainerFrame* nsComboboxControlFrame::GetContentInsertionFrame() {
+ return mInRedisplayText ? mDisplayFrame : nullptr;
+}
+
+void nsComboboxControlFrame::AppendDirectlyOwnedAnonBoxes(
+ nsTArray<OwnedAnonBox>& aResult) {
+ 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 (nimgr) nsTextNode(nimgr);
+
+ // set the value of the text node
+ mDisplayedIndex = Select().SelectedIndex();
+ if (mDisplayedIndex != -1) {
+ GetOptionText(mDisplayedIndex, mDisplayedOptionTextOrPreview);
+ }
+ ActuallyDisplayText(false);
+
+ aElements.AppendElement(mDisplayContent);
+ if (HasDropDownButton()) {
+ mButtonContent = mContent->OwnerDoc()->CreateHTMLElement(nsGkAtoms::button);
+ if (!mButtonContent) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ // make someone to listen to the button.
+ mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::type, u"button"_ns,
+ false);
+ // Set tabindex="-1" so that the button is not tabbable
+ mButtonContent->SetAttr(kNameSpaceID_None, nsGkAtoms::tabindex, u"-1"_ns,
+ false);
+ aElements.AppendElement(mButtonContent);
+ }
+
+ 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 final {
+ return MakeFrameName(u"ComboboxDisplay"_ns, aResult);
+ }
+#endif
+
+ void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput, nsReflowStatus& aStatus) final;
+
+ void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists) final;
+
+ 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!");
+ MOZ_ASSERT(aReflowInput.mParentReflowInput &&
+ aReflowInput.mParentReflowInput->mFrame == mComboBox,
+ "Combobox's frame tree is wrong!");
+
+ ReflowInput state(aReflowInput);
+ if (state.ComputedBSize() == NS_UNCONSTRAINEDSIZE) {
+ state.SetLineHeight(state.mParentReflowInput->GetLineHeight());
+ }
+ const WritingMode wm = aReflowInput.GetWritingMode();
+ const LogicalMargin bp = state.ComputedLogicalBorderPadding(wm);
+ MOZ_ASSERT(bp.BStartEnd(wm) == 0,
+ "We shouldn't have border and padding in the block axis in UA!");
+ 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()->EffectiveAppearance() ==
+ 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* ps = PresShell();
+ ServoStyleSet* styleSet = ps->StyleSet();
+
+ // create the ComputedStyle for the anonymous block frame and text frame
+ RefPtr<ComputedStyle> computedStyle =
+ styleSet->ResolveInheritingAnonymousBoxStyle(
+ PseudoStyleType::mozDisplayComboboxControlFrame, mComputedStyle);
+
+ RefPtr<ComputedStyle> textComputedStyle =
+ styleSet->ResolveStyleForText(mDisplayContent, mComputedStyle);
+
+ // Start by creating our anonymous block frame
+ mDisplayFrame = new (ps) nsComboboxDisplayFrame(computedStyle, this);
+ mDisplayFrame->Init(mContent, this, nullptr);
+
+ // Create a text frame and put it inside the block frame
+ nsIFrame* textFrame = NS_NewTextFrame(ps, textComputedStyle);
+
+ // initialize the text frame
+ textFrame->Init(mDisplayContent, mDisplayFrame, nullptr);
+ mDisplayContent->SetPrimaryFrame(textFrame);
+
+ mDisplayFrame->SetInitialChildList(FrameChildListID::Principal,
+ nsFrameList(textFrame, textFrame));
+ return mDisplayFrame;
+}
+
+void nsComboboxControlFrame::Destroy(DestroyContext& aContext) {
+ // Revoke any pending RedisplayTextEvent
+ mRedisplayTextEvent.Revoke();
+
+ mEventListener->Detach();
+
+ // Cleanup frames in popup child list
+ aContext.AddAnonymousContent(mDisplayContent.forget());
+ aContext.AddAnonymousContent(mButtonContent.forget());
+ nsBlockFrame::Destroy(aContext);
+}
+
+const nsFrameList& nsComboboxControlFrame::GetChildList(
+ ChildListID aListID) const {
+ return nsBlockFrame::GetChildList(aListID);
+}
+
+void nsComboboxControlFrame::GetChildLists(nsTArray<ChildList>* aLists) const {
+ nsBlockFrame::GetChildLists(aLists);
+}
+
+void nsComboboxControlFrame::SetInitialChildList(ChildListID aListID,
+ nsFrameList&& aChildList) {
+ for (nsIFrame* f : aChildList) {
+ MOZ_ASSERT(f->GetParent() == this, "Unexpected parent");
+ nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(f->GetContent());
+ if (formControl &&
+ formControl->ControlType() == FormControlType::ButtonButton) {
+ mButtonFrame = f;
+ break;
+ }
+ }
+ nsBlockFrame::SetInitialChildList(aListID, std::move(aChildList));
+}
+
+namespace mozilla {
+
+class nsDisplayComboboxFocus : public nsPaintedDisplayItem {
+ public:
+ nsDisplayComboboxFocus(nsDisplayListBuilder* aBuilder,
+ nsComboboxControlFrame* aFrame)
+ : nsPaintedDisplayItem(aBuilder, aFrame) {
+ MOZ_COUNT_CTOR(nsDisplayComboboxFocus);
+ }
+ MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayComboboxFocus)
+
+ 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());
+}
+
+} // namespace mozilla
+
+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 (Select().State().HasState(dom::ElementState::FOCUSRING) && IsThemed() &&
+ PresContext()->Theme()->ThemeWantsButtonInnerFocusRing()) {
+ aLists.Content()->AppendNewToTop<nsDisplayComboboxFocus>(aBuilder, this);
+ }
+
+ DisplaySelectionOverlay(aBuilder, aLists.Content());
+}
+
+void nsComboboxControlFrame::PaintFocus(DrawTarget& aDrawTarget, nsPoint aPt) {
+ /* Do we need to do anything? */
+ dom::ElementState state = mContent->AsElement()->State();
+ if (state.HasState(dom::ElementState::DISABLED) ||
+ !state.HasState(dom::ElementState::FOCUS)) {
+ return;
+ }
+
+ int32_t appUnitsPerDevPixel = PresContext()->AppUnitsPerDevPixel();
+
+ nsRect clipRect = mDisplayFrame->GetRect() + aPt;
+ aDrawTarget.PushClipRect(
+ NSRectToSnappedRect(clipRect, appUnitsPerDevPixel, aDrawTarget));
+
+ 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 (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, u"ValueChange"_ns, CanBubble::eYes, ChromeOnlyDispatch::eNo));
+}