diff options
| author | JustOff <Off.Just.Off@gmail.com> | 2019-03-14 19:40:42 +0200 |
|---|---|---|
| committer | JustOff <Off.Just.Off@gmail.com> | 2019-03-14 19:40:42 +0200 |
| commit | 15001512f3cf6ac2b9863071896f0eb63feb454b (patch) | |
| tree | 5f4e6db6450062aa58dfd6ce926e1f7abb5004c5 /layout | |
| parent | 9272e908abddfb9eb4a3875c16e2fc10062b0020 (diff) | |
| download | uxp-15001512f3cf6ac2b9863071896f0eb63feb454b.tar.gz | |
Handle the special case of a flex frame being the absolute containing block correctly from the CSS align code
Diffstat (limited to 'layout')
6 files changed, 148 insertions, 6 deletions
diff --git a/layout/generic/nsAbsoluteContainingBlock.cpp b/layout/generic/nsAbsoluteContainingBlock.cpp index 7c48aae92e..e3c847d01b 100644 --- a/layout/generic/nsAbsoluteContainingBlock.cpp +++ b/layout/generic/nsAbsoluteContainingBlock.cpp @@ -409,14 +409,30 @@ OffsetToAlignedStaticPos(const ReflowInput& aKidReflowInput, ? GetOrthogonalAxis(aAbsPosCBAxis) : aAbsPosCBAxis); + const bool placeholderContainerIsContainingBlock = + aPlaceholderContainer == aKidReflowInput.mCBReflowInput->mFrame; + nsIAtom* parentType = aPlaceholderContainer->GetType(); LogicalSize alignAreaSize(pcWM); if (parentType == nsGkAtoms::flexContainerFrame) { - // The alignment container is the flex container's content box: - alignAreaSize = aPlaceholderContainer->GetLogicalSize(pcWM); - LogicalMargin pcBorderPadding = - aPlaceholderContainer->GetLogicalUsedBorderAndPadding(pcWM); - alignAreaSize -= pcBorderPadding.Size(pcWM); + // We store the frame rect in FinishAndStoreOverflow, which runs _after_ + // reflowing the absolute frames, so handle the special case of the frame + // being the actual containing block here, by getting the size from + // aAbsPosCBSize. + // + // The alignment container is the flex container's content box. + if (placeholderContainerIsContainingBlock) { + alignAreaSize = aAbsPosCBSize.ConvertTo(pcWM, aAbsPosCBWM); + // aAbsPosCBSize is the padding-box, so substract the padding to get the + // content box. + alignAreaSize -= + aPlaceholderContainer->GetLogicalUsedPadding(pcWM).Size(pcWM); + } else { + alignAreaSize = aPlaceholderContainer->GetLogicalSize(pcWM); + LogicalMargin pcBorderPadding = + aPlaceholderContainer->GetLogicalUsedBorderAndPadding(pcWM); + alignAreaSize -= pcBorderPadding.Size(pcWM); + } } else if (parentType == nsGkAtoms::gridContainerFrame) { // This abspos elem's parent is a grid container. Per CSS Grid 10.1 & 10.2: // - If the grid container *also* generates the abspos containing block (a @@ -424,7 +440,7 @@ OffsetToAlignedStaticPos(const ReflowInput& aKidReflowInput, // the alignment container, too. (And its size is aAbsPosCBSize.) // - Otherwise, we use the grid's padding box as the alignment container. // https://drafts.csswg.org/css-grid/#static-position - if (aPlaceholderContainer == aKidReflowInput.mCBReflowInput->mFrame) { + if (placeholderContainerIsContainingBlock) { // The alignment container is the grid area that we're using as the // absolute containing block. alignAreaSize = aAbsPosCBSize.ConvertTo(pcWM, aAbsPosCBWM); diff --git a/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001-ref.html b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001-ref.html new file mode 100644 index 0000000000..08eec8691b --- /dev/null +++ b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001-ref.html @@ -0,0 +1,27 @@ +<!DOCTYPE html>
+<html><head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8"><title>CSS Test Reference</title>
+<meta charset="utf-8">
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<style>
+.parent {
+ position: fixed;
+ top: 0;
+ left: 0;
+ display: block;
+ width: 200px;
+ height: 200px;
+ background: yellow;
+}
+
+.child {
+ position: absolute;
+ left: 50px;
+ top: 50px;
+ width: 100px;
+ height: 100px;
+ background: green;
+}
+</style>
+</head><body><div class="parent"><div class="child"></div></div>
+</body></html>
\ No newline at end of file diff --git a/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001.html b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001.html new file mode 100644 index 0000000000..5f623cb849 --- /dev/null +++ b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001.html @@ -0,0 +1,30 @@ +<!DOCTYPE html>
+<html><head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8"><title>CSS Test: Absolutely positioned children of flex container with CSS align</title>
+<meta charset="utf-8">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#abspos-items">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1386654">
+<link rel="match" href="https://hg.mozilla.org/mozilla-central/raw-file/6538de3b6137/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-001-ref.html">
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<style>
+.parent {
+ position: fixed;
+ top: 0;
+ left: 0;
+ display: flex;
+ align-items: center;
+ justify-content: center;
+ width: 200px;
+ height: 200px;
+ background: yellow;
+}
+
+.child {
+ position: absolute;
+ width: 100px;
+ height: 100px;
+ background: green;
+}
+</style>
+</head><body><div class="parent"><div class="child"></div></div>
+</body></html>
\ No newline at end of file diff --git a/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002-ref.html b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002-ref.html new file mode 100644 index 0000000000..df730047bb --- /dev/null +++ b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002-ref.html @@ -0,0 +1,27 @@ +<!DOCTYPE html>
+<html><head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8"><title>CSS Test Reference</title>
+<meta charset="utf-8">
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<style>
+.parent {
+ position: fixed;
+ top: 0;
+ left: 0;
+ display: block;
+ width: 200px;
+ height: 200px;
+ background: yellow;
+}
+
+.child {
+ position: absolute;
+ left: 60px;
+ top: 60px;
+ width: 100px;
+ height: 100px;
+ background: green;
+}
+</style>
+</head><body><div class="parent"><div class="child"></div></div>
+</body></html>
\ No newline at end of file diff --git a/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002.html b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002.html new file mode 100644 index 0000000000..9e89c5ad0e --- /dev/null +++ b/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002.html @@ -0,0 +1,38 @@ +<!DOCTYPE html>
+<html><head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8"><title>CSS Test: Absolutely positioned children of flex container with CSS align</title>
+<meta charset="utf-8">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#abspos-items">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1386654">
+<link rel="match" href="https://hg.mozilla.org/mozilla-central/raw-file/6538de3b6137/layout/reftests/w3c-css/submitted/flexbox/position-absolute-containing-block-002-ref.html">
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<style>
+.parent {
+ position: fixed;
+ top: 0;
+ left: 0;
+ display: flex;
+ align-items: center;
+ justify-content: center;
+ width: 180px;
+ height: 180px;
+
+ /* Expand the background area to 200px, without touching the content-box,
+ which is what flex absolute children should be aligned relative to. */
+ border-top: 5px solid yellow;
+ padding-top: 15px;
+ border-left: 5px solid yellow;
+ padding-left: 15px;
+
+ background: yellow;
+}
+
+.child {
+ position: absolute;
+ width: 100px;
+ height: 100px;
+ background: green;
+}
+</style>
+</head><body><div class="parent"><div class="child"></div></div>
+</body></html>
\ No newline at end of file diff --git a/layout/reftests/w3c-css/submitted/flexbox/reftest.list b/layout/reftests/w3c-css/submitted/flexbox/reftest.list index fd8bfccc90..3df75aee6d 100644 --- a/layout/reftests/w3c-css/submitted/flexbox/reftest.list +++ b/layout/reftests/w3c-css/submitted/flexbox/reftest.list @@ -211,3 +211,7 @@ fails == flexbox-min-height-auto-002b.html flexbox-min-height-auto-002-ref.html == flexbox-single-line-clamp-1.html flexbox-single-line-clamp-1-ref.html == flexbox-single-line-clamp-2.html flexbox-single-line-clamp-2-ref.html == flexbox-single-line-clamp-3.html flexbox-single-line-clamp-3-ref.html + +# Flexbox as an absolute containing block. +== position-absolute-containing-block-001.html position-absolute-containing-block-001-ref.html +== position-absolute-containing-block-002.html position-absolute-containing-block-002-ref.html |