From fbaf0bb26397aa498eb9156f06d5a6fe34dd7dd8 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 03:14:29 +0200
Subject: Merging upstream version 125.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 layout/generic/nsBlockFrame.h | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

(limited to 'layout/generic/nsBlockFrame.h')

diff --git a/layout/generic/nsBlockFrame.h b/layout/generic/nsBlockFrame.h
index 15dd4c3278..9fb909430c 100644
--- a/layout/generic/nsBlockFrame.h
+++ b/layout/generic/nsBlockFrame.h
@@ -491,6 +491,14 @@ class nsBlockFrame : public nsContainerFrame {
   nscoord ComputeFinalSize(const ReflowInput& aReflowInput,
                            BlockReflowState& aState, ReflowOutput& aMetrics);
 
+  /**
+   * Calculates the necessary shift to honor 'align-content' and applies it.
+   */
+  void AlignContent(BlockReflowState& aState, ReflowOutput& aMetrics,
+                    nscoord aBEndEdgeOfChildren);
+  // Stash the effective align-content shift value between reflows
+  NS_DECLARE_FRAME_PROPERTY_SMALL_VALUE(AlignContentShift, nscoord)
+
   /**
    * Helper method for Reflow(). Computes the overflow areas created by our
    * children, and includes them into aOverflowAreas.
@@ -540,6 +548,16 @@ class nsBlockFrame : public nsContainerFrame {
    */
   bool IsVisualFormControl(nsPresContext* aPresContext);
 
+  /** Whether this block has an effective align-content property */
+  bool IsAligned() const {
+    return StylePosition()->mAlignContent.primary !=
+           mozilla::StyleAlignFlags::NORMAL;
+  }
+
+  nscoord GetAlignContentShift() const {
+    return IsAligned() ? GetProperty(AlignContentShift()) : 0;
+  }
+
   /**
    * For text-wrap:balance, we iteratively try reflowing with adjusted inline
    * size to find the "best" result (the tightest size that can be applied
@@ -848,13 +866,24 @@ class nsBlockFrame : public nsContainerFrame {
                                       LineIterator aLine,
                                       bool* aKeepReflowGoing);
 
+  /**
+   * Indicates if we need to compute a page name for the next page when pushing
+   * a truncated line.
+   *
+   * Using a value of No saves work when a new page name has already been set
+   * with nsCSSFrameConstructor::SetNextPageContentFramePageName.
+   */
+  enum class ComputeNewPageNameIfNeeded : uint8_t { Yes, No };
+
   /**
    * Push aLine (and any after it), since it cannot be placed on this
    * page/column.  Set aKeepReflowGoing to false and set
    * flag aState.mReflowStatus as incomplete.
    */
   void PushTruncatedLine(BlockReflowState& aState, LineIterator aLine,
-                         bool* aKeepReflowGoing);
+                         bool* aKeepReflowGoing,
+                         ComputeNewPageNameIfNeeded aComputeNewPageName =
+                             ComputeNewPageNameIfNeeded::Yes);
 
   void SplitLine(BlockReflowState& aState, nsLineLayout& aLineLayout,
                  LineIterator aLine, nsIFrame* aFrame,
-- 
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