Title: [234680] trunk
Revision
234680
Author
rn...@webkit.org
Date
2018-08-07 16:54:25 -0700 (Tue, 07 Aug 2018)

Log Message

document.open and document.write must throw while the HTML parser is synchronously constructing a custom element
https://bugs.webkit.org/show_bug.cgi?id=187319
<rdar://problem/42843012>

Reviewed by Frédéric Wang.

Source/WebCore:

Make document.open, document.write, document.writeln, and document.close throw InvalidStateError during
a synchronous custom element construction as specified:
https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token
https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#throw-on-dynamic-markup-insertion-counter

Tests: fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html
       fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html

* WebCore.xcodeproj/project.pbxproj:
* dom/Document.cpp:
(WebCore::Document::openForBindings): Throw InvalidStateError when m_throwOnDynamicMarkupInsertionCount is non-zero.
(WebCore::Document::closeForBindings): Ditto.
(WebCore::Document::write): Ditto.
(WebCore::Document::writeln): Ditto.
* dom/Document.h: Re-ordered the related instance variables in the order they appear in the spec, and updated spec URLs.
* dom/ThrowOnDynamicMarkupInsertionCountIncrementer.h: Added.
(WebCore::ThrowOnDynamicMarkupInsertionCountIncrementer): Added.
(WebCore::ThrowOnDynamicMarkupInsertionCountIncrementer::ThrowOnDynamicMarkupInsertionCountIncrementer):
(WebCore::ThrowOnDynamicMarkupInsertionCountIncrementer::~ThrowOnDynamicMarkupInsertionCountIncrementer):
* html/parser/HTMLDocumentParser.cpp:
(WebCore::HTMLDocumentParser::runScriptsForPausedTreeBuilder): Instantiate ThrowOnDynamicMarkupInsertionCountIncrementer.

LayoutTests:

Added W3C style testharness.js tests. The WPT test added by https://github.com/web-platform-tests/wpt/pull/12037
doesn't test nearly as many edge cases.

* fast/custom-elements/resources/navigation-destination.html: Added.
* fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct-expected.txt: Added.
* fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html: Added.
* fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions-expected.txt: Added.
* fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html: Added.

Modified Paths

Added Paths

Diff

Modified: trunk/LayoutTests/ChangeLog (234679 => 234680)


--- trunk/LayoutTests/ChangeLog	2018-08-07 23:46:22 UTC (rev 234679)
+++ trunk/LayoutTests/ChangeLog	2018-08-07 23:54:25 UTC (rev 234680)
@@ -1,3 +1,20 @@
+2018-08-07  Ryosuke Niwa  <rn...@webkit.org>
+
+        document.open and document.write must throw while the HTML parser is synchronously constructing a custom element
+        https://bugs.webkit.org/show_bug.cgi?id=187319
+        <rdar://problem/42843012>
+
+        Reviewed by Frédéric Wang.
+
+        Added W3C style testharness.js tests. The WPT test added by https://github.com/web-platform-tests/wpt/pull/12037
+        doesn't test nearly as many edge cases.
+
+        * fast/custom-elements/resources/navigation-destination.html: Added.
+        * fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct-expected.txt: Added.
+        * fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html: Added.
+        * fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions-expected.txt: Added.
+        * fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html: Added.
+
 2018-08-07  Rob Buis  <rb...@igalia.com>
 
         fetch() with subresource integrity crashes on zero length body

Added: trunk/LayoutTests/fast/custom-elements/resources/navigation-destination.html (0 => 234680)


--- trunk/LayoutTests/fast/custom-elements/resources/navigation-destination.html	                        (rev 0)
+++ trunk/LayoutTests/fast/custom-elements/resources/navigation-destination.html	2018-08-07 23:54:25 UTC (rev 234680)
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+<body>
+<p>Navigated!</p>
+<script>
+parent.postMessage('didNavigate', '*');
+</script>
+</body>
+</html>

Added: trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct-expected.txt (0 => 234680)


--- trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct-expected.txt	2018-08-07 23:54:25 UTC (rev 234680)
@@ -0,0 +1,13 @@
+
+PASS document.open() must throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.open("text/html") must throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.open(URL) must NOT throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.close() must throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.write must throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.writeln must throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.open() of another document must not throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.open("text/html") of another document must not throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.close() of another document must not throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.write of another document must not throw an InvalidStateError when synchronously constructing a custom element 
+PASS document.writeln of another document must not throw an InvalidStateError when synchronously constructing a custom element 
+

Added: trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html (0 => 234680)


--- trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html	                        (rev 0)
+++ trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html	2018-08-07 23:54:25 UTC (rev 234680)
@@ -0,0 +1,117 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Custom Elements: create an element for a token must increment and decrement document's throw-on-dynamic-markup-insertion counter</title>
+<meta name="author" title="Ryosuke Niwa" href=""
+<meta name="assert" content="Invoking document.open, document.write, document.writeln, and document.write must throw an exception when the HTML parser is creating a custom element for a token">
+<meta name="help" content="https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token">
+<meta name="help" content="https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#throw-on-dynamic-markup-insertion-counter">
+<script src=""
+<script src=""
+<script src=""
+</head>
+<body>
+<div id="log"></div>
+<script>
+
+async function construct_custom_element_in_parser(test, call_function)
+{
+    const window = await create_window_in_test(test);
+    const document = window.document;
+
+    document.open();
+
+    let executed = false;
+    let exception = null;
+    class CustomElement extends window.HTMLElement {
+        constructor() {
+            super();
+            try {
+                call_function(document, window);
+            } catch (error) {
+                exception = error;
+            }
+            executed = true;
+        }
+    }
+    window.customElements.define('some-element', CustomElement);
+
+    document.write('<!DOCTYPE html><html><body><some-element></some-element></body></html>');
+    document.close();
+
+    assert_true(executed, 'Must synchronously instantiate a custom element');
+    return {window, document, exception};
+}
+
+promise_test(async function () {
+    const result = await construct_custom_element_in_parser(this, (document) => document.open());
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+}, 'document.open() must throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const result = await construct_custom_element_in_parser(this, (document) => document.open('text/html'));
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+}, 'document.open("text/html") must throw an InvalidStateError when synchronously constructing a custom element');
+
+// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-open-window
+promise_test(async function () {
+    let load_promise = new Promise((resolve) => window._onmessage_ = (event) => resolve(event.data));
+    const result = await construct_custom_element_in_parser(this, (document, window) => document.open('resources/navigation-destination.html', '_self', ''));
+    assert_equals(result.exception, null);
+    assert_equals(await load_promise, 'didNavigate');
+}, 'document.open(URL) must NOT throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const result = await construct_custom_element_in_parser(this, (document) => document.close());
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+}, 'document.close() must throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const result = await construct_custom_element_in_parser(this, (document) => document.write('<b>some text</b>'));
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+    assert_equals(result.document.querySelector('b'), null, 'Must not insert new content');
+    assert_false(result.document.documentElement.innerHTML.includes('some text'), 'Must not insert new content');
+}, 'document.write must throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const result = await construct_custom_element_in_parser(this, (document) => document.writeln('<b>some text</b>'));
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+    assert_equals(result.document.querySelector('b'), null, 'Must not insert new content');
+    assert_false(result.document.documentElement.innerHTML.includes('some text'), 'Must not insert new content');
+}, 'document.writeln must throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await construct_custom_element_in_parser(this, (document) => another_window.document.open());
+    assert_equals(result.exception, null);
+}, 'document.open() of another document must not throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await construct_custom_element_in_parser(this, (document) => another_window.document.open('text/html'));
+    assert_equals(result.exception, null);
+}, 'document.open("text/html") of another document must not throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await construct_custom_element_in_parser(this, (document) => another_window.document.close());
+    assert_equals(result.exception, null);
+}, 'document.close() of another document must not throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await construct_custom_element_in_parser(this, (document) => another_window.document.write('<b>some text</b>'));
+    assert_equals(result.exception, null);
+    assert_equals(another_window.document.querySelector('b').outerHTML, '<b>some text</b>');
+}, 'document.write of another document must not throw an InvalidStateError when synchronously constructing a custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await construct_custom_element_in_parser(this, (document) => another_window.document.writeln('<b>some text</b>'));
+    assert_equals(result.exception, null);
+    assert_equals(another_window.document.querySelector('b').outerHTML, '<b>some text</b>');
+}, 'document.writeln of another document must not throw an InvalidStateError when synchronously constructing a custom element');
+
+</script>
+</body>
+</html>

Added: trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions-expected.txt (0 => 234680)


--- trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions-expected.txt	2018-08-07 23:54:25 UTC (rev 234680)
@@ -0,0 +1,13 @@
+
+PASS document.open() must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.open("text/html") must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.open(URL) must NOT throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.close() must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.write must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.writeln must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.open() of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.open("text/html") of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.close() of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.write of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+PASS document.writeln of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element 
+

Added: trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html (0 => 234680)


--- trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html	                        (rev 0)
+++ trunk/LayoutTests/fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html	2018-08-07 23:54:25 UTC (rev 234680)
@@ -0,0 +1,117 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Custom Elements: create an element for a token must increment and decrement document's throw-on-dynamic-markup-insertion counter</title>
+<meta name="author" title="Ryosuke Niwa" href=""
+<meta name="assert" content="Invoking document.open, document.write, document.writeln, and document.write must throw an exception when the HTML parser is creating a custom element for a token">
+<meta name="help" content="https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token">
+<meta name="help" content="https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#throw-on-dynamic-markup-insertion-counter">
+<script src=""
+<script src=""
+<script src=""
+</head>
+<body>
+<div id="log"></div>
+<script>
+
+async function custom_element_reactions_in_parser(test, call_function)
+{
+    const window = await create_window_in_test(test);
+    const document = window.document;
+
+    document.open();
+
+    let executed = false;
+    let exception = null;
+    class CustomElement extends window.HTMLElement {
+        attributeChangedCallback(name, oldValue, newValue) {
+            try {
+                call_function(document, window);
+            } catch (error) {
+                exception = error;
+            }
+            executed = true;
+        }
+    }
+    CustomElement.observedAttributes = ['title'];
+    window.customElements.define('some-element', CustomElement);
+
+    document.write('<!DOCTYPE html><html><body><some-element title="some title"></some-element></body></html>');
+    document.close();
+
+    assert_true(executed, 'Must immediately process custom element reactions for setting attributes');
+    return {frameElement, window, document, exception};
+}
+
+promise_test(async function () {
+    const result = await custom_element_reactions_in_parser(this, (document) => document.open());
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+}, 'document.open() must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const result = await custom_element_reactions_in_parser(this, (document) => document.open('text/html'));
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+}, 'document.open("text/html") must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-open-window
+promise_test(async function () {
+    let load_promise = new Promise((resolve) => window._onmessage_ = (event) => resolve(event.data));
+    const result = await custom_element_reactions_in_parser(this, (document, window) => document.open('resources/navigation-destination.html', '_self', ''));
+    assert_equals(result.exception, null);
+    assert_equals(await load_promise, 'didNavigate');
+}, 'document.open(URL) must NOT throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const result = await custom_element_reactions_in_parser(this, (document) => document.close());
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+}, 'document.close() must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const result = await custom_element_reactions_in_parser(this, (document) => document.write('<b>some text</b>'));
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+    assert_equals(result.document.querySelector('b'), null, 'Must not insert new content');
+    assert_false(result.document.documentElement.innerHTML.includes('some text'), 'Must not insert new content');
+}, 'document.write must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const result = await custom_element_reactions_in_parser(this, (document) => document.writeln('<b>some text</b>'));
+    assert_throws({name: 'InvalidStateError'}, () => { throw result.exception; }, 'Must throw an InvalidStateError');
+    assert_equals(result.document.querySelector('b'), null, 'Must not insert new content');
+    assert_false(result.document.documentElement.innerHTML.includes('some text'), 'Must not insert new content');
+}, 'document.writeln must throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await custom_element_reactions_in_parser(this, (document) => another_window.document.open());
+    assert_equals(result.exception, null);
+}, 'document.open() of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await custom_element_reactions_in_parser(this, (document) => another_window.document.open('text/html'));
+    assert_equals(result.exception, null);
+}, 'document.open("text/html") of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await custom_element_reactions_in_parser(this, (document) => another_window.document.close());
+    assert_equals(result.exception, null);
+}, 'document.close() of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await custom_element_reactions_in_parser(this, (document) => another_window.document.write('<b>some text</b>'));
+    assert_equals(result.exception, null);
+    assert_equals(another_window.document.querySelector('b').outerHTML, '<b>some text</b>');
+}, 'document.write of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+promise_test(async function () {
+    const another_window = await create_window_in_test(this);
+    const result = await custom_element_reactions_in_parser(this, (document) => another_window.document.writeln('<b>some text</b>'));
+    assert_equals(result.exception, null);
+    assert_equals(another_window.document.querySelector('b').outerHTML, '<b>some text</b>');
+}, 'document.writeln of another document must not throw an InvalidStateError when processing custom element reactions for a synchronous constructed custom element');
+
+</script>
+</body>
+</html>

Modified: trunk/Source/WebCore/ChangeLog (234679 => 234680)


--- trunk/Source/WebCore/ChangeLog	2018-08-07 23:46:22 UTC (rev 234679)
+++ trunk/Source/WebCore/ChangeLog	2018-08-07 23:54:25 UTC (rev 234680)
@@ -1,3 +1,33 @@
+2018-08-07  Ryosuke Niwa  <rn...@webkit.org>
+
+        document.open and document.write must throw while the HTML parser is synchronously constructing a custom element
+        https://bugs.webkit.org/show_bug.cgi?id=187319
+        <rdar://problem/42843012>
+
+        Reviewed by Frédéric Wang.
+
+        Make document.open, document.write, document.writeln, and document.close throw InvalidStateError during
+        a synchronous custom element construction as specified:
+        https://html.spec.whatwg.org/multipage/parsing.html#create-an-element-for-the-token
+        https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#throw-on-dynamic-markup-insertion-counter
+
+        Tests: fast/custom-elements/throw-on-dynamic-markup-insertion-counter-construct.html
+               fast/custom-elements/throw-on-dynamic-markup-insertion-counter-reactions.html
+
+        * WebCore.xcodeproj/project.pbxproj:
+        * dom/Document.cpp:
+        (WebCore::Document::openForBindings): Throw InvalidStateError when m_throwOnDynamicMarkupInsertionCount is non-zero.
+        (WebCore::Document::closeForBindings): Ditto.
+        (WebCore::Document::write): Ditto.
+        (WebCore::Document::writeln): Ditto.
+        * dom/Document.h: Re-ordered the related instance variables in the order they appear in the spec, and updated spec URLs.
+        * dom/ThrowOnDynamicMarkupInsertionCountIncrementer.h: Added.
+        (WebCore::ThrowOnDynamicMarkupInsertionCountIncrementer): Added.
+        (WebCore::ThrowOnDynamicMarkupInsertionCountIncrementer::ThrowOnDynamicMarkupInsertionCountIncrementer):
+        (WebCore::ThrowOnDynamicMarkupInsertionCountIncrementer::~ThrowOnDynamicMarkupInsertionCountIncrementer):
+        * html/parser/HTMLDocumentParser.cpp:
+        (WebCore::HTMLDocumentParser::runScriptsForPausedTreeBuilder): Instantiate ThrowOnDynamicMarkupInsertionCountIncrementer.
+
 2018-08-07  Alex Christensen  <achristen...@webkit.org>
 
         Use 1-byte enum class for Document::StandaloneStatus

Modified: trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj (234679 => 234680)


--- trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj	2018-08-07 23:46:22 UTC (rev 234679)
+++ trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj	2018-08-07 23:54:25 UTC (rev 234680)
@@ -10859,6 +10859,7 @@
 		9B32CDA813DF7FA900F34D13 /* RenderedPosition.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = RenderedPosition.cpp; sourceTree = "<group>"; };
 		9B417062125662B3006B28FC /* ApplyBlockElementCommand.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ApplyBlockElementCommand.h; sourceTree = "<group>"; };
 		9B417063125662B3006B28FC /* ApplyBlockElementCommand.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ApplyBlockElementCommand.cpp; sourceTree = "<group>"; };
+		9B4376EF2117E872009D03A0 /* ThrowOnDynamicMarkupInsertionCountIncrementer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ThrowOnDynamicMarkupInsertionCountIncrementer.h; sourceTree = "<group>"; };
 		9B50B1DC17CD4C0F0087F63C /* FormNamedItem.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FormNamedItem.h; sourceTree = "<group>"; };
 		9B532EA11BA928570038A827 /* SlotAssignment.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = SlotAssignment.cpp; sourceTree = "<group>"; };
 		9B532EA21BA928570038A827 /* SlotAssignment.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SlotAssignment.h; sourceTree = "<group>"; };
@@ -26575,6 +26576,7 @@
 				A77B419F12E675A90054343D /* TextEventInputType.h */,
 				E4D988B517BFEB210084FB88 /* TextNodeTraversal.cpp */,
 				E4D988B317BFD1F60084FB88 /* TextNodeTraversal.h */,
+				9B4376EF2117E872009D03A0 /* ThrowOnDynamicMarkupInsertionCountIncrementer.h */,
 				0F54DD051881D5F5003EEDBB /* Touch.h */,
 				0F54DD061881D5F5003EEDBB /* TouchEvent.h */,
 				0F54DD071881D5F5003EEDBB /* TouchList.h */,

Modified: trunk/Source/WebCore/dom/Document.cpp (234679 => 234680)


--- trunk/Source/WebCore/dom/Document.cpp	2018-08-07 23:46:22 UTC (rev 234679)
+++ trunk/Source/WebCore/dom/Document.cpp	2018-08-07 23:54:25 UTC (rev 234680)
@@ -2609,12 +2609,9 @@
 // FIXME: Add support for the 'type' and 'replace' parameters.
 ExceptionOr<Document&> Document::openForBindings(Document* responsibleDocument, const String&, const String&)
 {
-    if (!isHTMLDocument())
+    if (!isHTMLDocument() || m_throwOnDynamicMarkupInsertionCount)
         return Exception { InvalidStateError };
 
-    // FIXME: This should also throw if "document's throw-on-dynamic-markup-insertion counter is greater than 0".
-    // https://bugs.webkit.org/show_bug.cgi?id=187319
-
     open(responsibleDocument);
     return *this;
 }
@@ -2753,12 +2750,9 @@
     // FIXME: We should follow the specification more closely:
     //        http://www.whatwg.org/specs/web-apps/current-work/#dom-document-close
 
-    if (!isHTMLDocument())
+    if (!isHTMLDocument() || m_throwOnDynamicMarkupInsertionCount)
         return Exception { InvalidStateError };
 
-    // FIXME: This should also throw if "document's throw-on-dynamic-markup-insertion counter is greater than 0".
-    // https://bugs.webkit.org/show_bug.cgi?id=187319
-
     close();
     return { };
 }
@@ -2984,12 +2978,9 @@
 
 ExceptionOr<void> Document::write(Document* responsibleDocument, Vector<String>&& strings)
 {
-    if (!isHTMLDocument())
+    if (!isHTMLDocument() || m_throwOnDynamicMarkupInsertionCount)
         return Exception { InvalidStateError };
 
-    // FIXME: This should also throw if "document's throw-on-dynamic-markup-insertion counter is greater than 0".
-    // https://bugs.webkit.org/show_bug.cgi?id=187319
-
     SegmentedString text;
     for (auto& string : strings)
         text.append(WTFMove(string));
@@ -3001,12 +2992,9 @@
 
 ExceptionOr<void> Document::writeln(Document* responsibleDocument, Vector<String>&& strings)
 {
-    if (!isHTMLDocument())
+    if (!isHTMLDocument() || m_throwOnDynamicMarkupInsertionCount)
         return Exception { InvalidStateError };
 
-    // FIXME: This should also throw if "document's throw-on-dynamic-markup-insertion counter is greater than 0".
-    // https://bugs.webkit.org/show_bug.cgi?id=187319
-
     SegmentedString text;
     for (auto& string : strings)
         text.append(WTFMove(string));

Modified: trunk/Source/WebCore/dom/Document.h (234679 => 234680)


--- trunk/Source/WebCore/dom/Document.h	2018-08-07 23:46:22 UTC (rev 234679)
+++ trunk/Source/WebCore/dom/Document.h	2018-08-07 23:54:25 UTC (rev 234680)
@@ -1480,8 +1480,9 @@
 private:
     friend class DocumentParserYieldToken;
     friend class Node;
+    friend class ThrowOnDynamicMarkupInsertionCountIncrementer;
+    friend class IgnoreOpensDuringUnloadCountIncrementer;
     friend class IgnoreDestructiveWriteCountIncrementer;
-    friend class IgnoreOpensDuringUnloadCountIncrementer;
 
     bool shouldInheritContentSecurityPolicyFromOwner() const;
 
@@ -1854,12 +1855,15 @@
     int m_loadEventDelayCount { 0 };
     unsigned m_lastStyleUpdateSizeForTesting { 0 };
 
-    // https://html.spec.whatwg.org/multipage/webappapis.html#ignore-destructive-writes-counter
-    unsigned m_ignoreDestructiveWriteCount { 0 };
+    // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#throw-on-dynamic-markup-insertion-counter
+    unsigned m_throwOnDynamicMarkupInsertionCount { 0 };
 
-    // https://html.spec.whatwg.org/multipage/webappapis.html#ignore-opens-during-unload-counter
+    // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#ignore-opens-during-unload-counter
     unsigned m_ignoreOpensDuringUnloadCount { 0 };
 
+    // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#ignore-destructive-writes-counter
+    unsigned m_ignoreDestructiveWriteCount { 0 };
+
     unsigned m_activeParserCount { 0 };
     unsigned m_styleRecalcCount { 0 };
 

Added: trunk/Source/WebCore/dom/ThrowOnDynamicMarkupInsertionCountIncrementer.h (0 => 234680)


--- trunk/Source/WebCore/dom/ThrowOnDynamicMarkupInsertionCountIncrementer.h	                        (rev 0)
+++ trunk/Source/WebCore/dom/ThrowOnDynamicMarkupInsertionCountIncrementer.h	2018-08-07 23:54:25 UTC (rev 234680)
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2018 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "Document.h"
+
+namespace WebCore {
+
+class ThrowOnDynamicMarkupInsertionCountIncrementer {
+    WTF_MAKE_NONCOPYABLE(ThrowOnDynamicMarkupInsertionCountIncrementer);
+public:
+    explicit ThrowOnDynamicMarkupInsertionCountIncrementer(Document& document)
+        : m_document(document)
+    {
+        ++document.m_throwOnDynamicMarkupInsertionCount;
+    }
+
+    ~ThrowOnDynamicMarkupInsertionCountIncrementer()
+    {
+        ASSERT(m_document->m_throwOnDynamicMarkupInsertionCount);
+        --m_document->m_throwOnDynamicMarkupInsertionCount;
+    }
+
+private:
+    Ref<Document> m_document;
+};
+    
+} // namespace WebCore

Modified: trunk/Source/WebCore/html/parser/HTMLDocumentParser.cpp (234679 => 234680)


--- trunk/Source/WebCore/html/parser/HTMLDocumentParser.cpp	2018-08-07 23:46:22 UTC (rev 234679)
+++ trunk/Source/WebCore/html/parser/HTMLDocumentParser.cpp	2018-08-07 23:54:25 UTC (rev 234680)
@@ -41,6 +41,7 @@
 #include "LinkLoader.h"
 #include "NavigationScheduler.h"
 #include "ScriptElement.h"
+#include "ThrowOnDynamicMarkupInsertionCountIncrementer.h"
 
 namespace WebCore {
 
@@ -210,6 +211,8 @@
 
         // https://html.spec.whatwg.org/#create-an-element-for-the-token
         {
+            // Prevent document.open/write during reactions by allocating the incrementer before the reactions stack.
+            ThrowOnDynamicMarkupInsertionCountIncrementer incrementer(*document());
             CustomElementReactionStack reactionStack(document()->execState());
             auto& elementInterface = constructionData->elementInterface.get();
             auto newElement = elementInterface.constructElementWithFallback(*document(), constructionData->name);
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