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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /layout/mathml/nsMathMLmunderoverFrame.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/mathml/nsMathMLmunderoverFrame.h')
-rw-r--r--layout/mathml/nsMathMLmunderoverFrame.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmunderoverFrame.h b/layout/mathml/nsMathMLmunderoverFrame.h
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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/. */
+
+#ifndef nsMathMLmunderoverFrame_h___
+#define nsMathMLmunderoverFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsIReflowCallback.h"
+#include "nsMathMLContainerFrame.h"
+
+namespace mozilla {
+class PresShell;
+} // namespace mozilla
+
+//
+// <munderover> -- attach an underscript-overscript pair to a base
+//
+
+class nsMathMLmunderoverFrame final : public nsMathMLContainerFrame,
+ public nsIReflowCallback {
+ public:
+ NS_DECL_FRAMEARENA_HELPERS(nsMathMLmunderoverFrame)
+
+ friend nsIFrame* NS_NewMathMLmunderoverFrame(mozilla::PresShell* aPresShell,
+ ComputedStyle* aStyle);
+
+ nsresult Place(DrawTarget* aDrawTarget, bool aPlaceOrigin,
+ ReflowOutput& aDesiredSize) override;
+
+ NS_IMETHOD InheritAutomaticData(nsIFrame* aParent) override;
+
+ NS_IMETHOD TransmitAutomaticData() override;
+
+ NS_IMETHOD UpdatePresentationData(uint32_t aFlagsValues,
+ uint32_t aFlagsToUpdate) override;
+
+ void Destroy(DestroyContext&) override;
+
+ nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+ int32_t aModType) override;
+
+ uint8_t ScriptIncrement(nsIFrame* aFrame) override;
+
+ // nsIReflowCallback.
+ bool ReflowFinished() override;
+ void ReflowCallbackCanceled() override;
+
+ protected:
+ explicit nsMathMLmunderoverFrame(ComputedStyle* aStyle,
+ nsPresContext* aPresContext)
+ : nsMathMLContainerFrame(aStyle, aPresContext, kClassID),
+ mIncrementUnder(false),
+ mIncrementOver(false) {}
+
+ virtual ~nsMathMLmunderoverFrame();
+
+ private:
+ // Helper to set the "increment script level" flag on the element belonging
+ // to a child frame given by aChildIndex.
+ //
+ // When this flag is set, the style system will increment the scriptlevel for
+ // the child element. This is needed for situations where the style system
+ // cannot itself determine the scriptlevel (mfrac, munder, mover, munderover).
+ //
+ // This should be called during reflow.
+ //
+ // We set the flag and if it changed, we request appropriate restyling and
+ // also queue a post-reflow callback to ensure that restyle and reflow happens
+ // immediately after the current reflow.
+ void SetIncrementScriptLevel(uint32_t aChildIndex, bool aIncrement);
+ void SetPendingPostReflowIncrementScriptLevel();
+
+ bool mIncrementUnder;
+ bool mIncrementOver;
+
+ struct SetIncrementScriptLevelCommand {
+ uint32_t mChildIndex;
+ bool mDoIncrement;
+ };
+
+ nsTArray<SetIncrementScriptLevelCommand>
+ mPostReflowIncrementScriptLevelCommands;
+};
+
+#endif /* nsMathMLmunderoverFrame_h___ */