Attachment 361350 Details for Bug 194271 – Part 1

[patch] Part 1

bug-194271-20190206174416.patch (text/plain), 48.48 KB, created by Wenson Hsieh on 2019-02-06 17:44:17 PST

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Creator: Wenson Hsieh

Created: 2019-02-06 17:44:17 PST

Size: 48.48 KB

patch

obsolete

>Subversion Revision: 240926
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index ad89714ce17a3527e1228d0ac5779ad5d80cd1bd..58435f05f470f10c6f675f8a67566fae08465680 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,66 @@
>+2019-02-05  Wenson Hsieh  <wenson_hsieh@apple.com>
>+
>+        Allow pages to trigger programmatic paste from script on iOS
>+        https://bugs.webkit.org/show_bug.cgi?id=194271
>+        <rdar://problem/47808810>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add support for allowing script to trigger programmatic paste commands. Currently on macOS and iOS, the ability
>+        to trigger programmatic paste (i.e. `document.execCommand('Paste');`) is disabled by default, such that
>+        execCommand is simply a no-op that returns false. This policy is a privacy measure (common among other major
>+        browsers) that prevents untrusted web content from sniffing the content off of the system pasteboard (even on
>+        user interaction, since unintended user interaction isn't altogether rare).
>+
>+        In order to make it possible for web pages to programmatically paste without opening the door to privacy and
>+        security concerns, we make paste commands triggered from bindings present platform UI on iOS, in the form of a
>+        callout bar with the single option to paste. This UI is dismissed upon any user interaction; furthermore, any
>+        user interaction short of explicitly triggering the "Paste" action subsequently prevents the page from executing
>+        the paste (thereby causing execCommand to return false). However, if the paste action is chosen by the user, we
>+        instead follow through with the programmatic paste command.
>+
>+        New tests to come in a followup patch.
>+
>+        * dom/Document.cpp:
>+        (WebCore::Document::hasGrantedProgrammaticClipboardAccess const):
>+        (WebCore::Document::hasDeniedProgrammaticClipboardAccess const):
>+        (WebCore::Document::didRequestProgrammaticClipboardAccess):
>+
>+        Add helpers on Document to update and query programmatic clipboard access state. The programmatic clipboard
>+        access states are "Pending" (i.e. pending a response from the user), "Granted" (the user has granted clipboard
>+        access to the page), or "denied" (the user has prevented the page from reading the contents of the clipboard).
>+
>+        (WebCore::Document::programmaticClipboardAccessTimerFired):
>+        (WebCore::Document::suspendScheduledTasks):
>+
>+        When programmatic clipboard access is granted to a Document, make the decision sticky until the end of the
>+        runloop by resetting the access state to "Pending" on a zero-delay timer.
>+
>+        * dom/Document.h:
>+        * editing/EditorCommand.cpp:
>+        (WebCore::executePaste):
>+        (WebCore::executePasteAndMatchStyle):
>+        (WebCore::executePasteAsPlainText):
>+        (WebCore::executePasteAsQuotation):
>+
>+        When executing a paste command where the source is DOM bindings, try to request programmatic clipboard access as
>+        needed before proceeding with the paste.
>+
>+        (WebCore::supportedPaste):
>+        * loader/EmptyClients.cpp:
>+        * page/EditorClient.h:
>+        * page/Frame.cpp:
>+        (WebCore::Frame::requestProgrammaticClipboardAccess):
>+
>+        Add a helper method that requests access to the clipboard when pasting.
>+
>+        * page/Frame.h:
>+        * page/RuntimeEnabledFeatures.h:
>+        (WebCore::RuntimeEnabledFeatures::programmaticClipboardAccessRequestEnabled const):
>+        (WebCore::RuntimeEnabledFeatures::setProgrammaticClipboardAccessRequestEnabled):
>+
>+        Introduce a new runtime-enabled feature, used to gate requests for programmatic clipboard access.
>+
> 2019-02-04  Wenson Hsieh  <wenson_hsieh@apple.com>
> 
>         [iOS] Unable to make a selection in jsfiddle.net using arrow keys when requesting desktop site
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 9f125cc22a6d892366ad6880335ebfbc70e66e6d..697a2a7f0aa5efb4adde221de857bfc1fd384378 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,116 @@
>+2019-02-06  Wenson Hsieh  <wenson_hsieh@apple.com>
>+
>+        Allow pages to trigger programmatic paste from script on iOS
>+        https://bugs.webkit.org/show_bug.cgi?id=194271
>+        <rdar://problem/47808810>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * Shared/WebPreferences.yaml:
>+        * Shared/WebPreferencesDefaultValues.h:
>+
>+        Add an internal setting to enable or disable programmatic clipboard access requests. This is on by default in
>+        iOS only (excluding watchOS and Apple TV), and is additionally disabled on macOS.
>+
>+        * UIProcess/API/gtk/PageClientImpl.cpp:
>+        (WebKit::PageClientImpl::requestProgrammaticClipboardAccess):
>+        * UIProcess/API/gtk/PageClientImpl.h:
>+        * UIProcess/API/wpe/PageClientImpl.cpp:
>+        (WebKit::PageClientImpl::requestProgrammaticClipboardAccess):
>+        * UIProcess/API/wpe/PageClientImpl.h:
>+        * UIProcess/PageClient.h:
>+        * UIProcess/WebPageProxy.cpp:
>+        (WebKit::WebPageProxy::requestProgrammaticClipboardAccess):
>+        * UIProcess/WebPageProxy.h:
>+        * UIProcess/WebPageProxy.messages.in:
>+        * UIProcess/ios/PageClientImplIOS.h:
>+        * UIProcess/ios/PageClientImplIOS.mm:
>+        (WebKit::PageClientImpl::requestProgrammaticClipboardAccess):
>+
>+        Plumb programmatic clipboard access requests from the web process (WebEditorClient) to the view (WKContentView).
>+        As per usual, this involves WebEditorClient, WebPage, WebPageProxy, PageClient and finally WKContentView.
>+
>+        * UIProcess/ios/WKContentViewInteraction.h:
>+        * UIProcess/ios/WKContentViewInteraction.mm:
>+        (-[WKContentView cleanupInteraction]):
>+        (-[WKContentView resignFirstResponderForWebView]):
>+        (-[WKContentView _webTouchEventsRecognized:]):
>+
>+        Bail from any pending clipboard access handler the moment we start handling touches on the web view.
>+
>+        (-[WKContentView textInteractionGesture:shouldBeginAtPoint:]):
>+        (-[WKContentView canPerformAction:withSender:]):
>+
>+        If we're handling a programmatic paste, always return YES to allow the callout bar to show the "Paste" option.
>+
>+        (-[WKContentView _didHideMenu:]):
>+
>+        If the menu is programmatically hidden by the app while handling a programmatic paste request, immediately
>+        cancel the programmatic paste.
>+
>+        (-[WKContentView pasteForWebView:]):
>+
>+        Adjust -pasteForWebView: on WKContentView to first check whether there's an outstanding programmatic paste
>+        completion handler to invoke, instead of telling the page to execute a paste command.
>+
>+        (-[WKContentView _invokeProgrammaticPasteCompletionHandlerWithResult:]):
>+
>+        Add a helper to take and invoke the current programmatic paste completion handler (if it exists) with the given
>+        result, and then dismiss the shared callout bar. Returns whether or not the paste completion handler exists.
>+        Invoked from various sources of user interaction or significant state changes (e.g. following a web process
>+        crash in -cleanupInteraction).
>+
>+        (-[WKContentView _willPerformAction:sender:]):
>+        (-[WKContentView _didPerformAction:sender:]):
>+
>+        Add hooks to detect when WKContentView is executing an editing action. This is to ensure that the page doesn't
>+        get stuck in a bad state in the case where WKWebView has been subclassed, overrides `-paste:`, and does not
>+        invoke the superclass method (which calls back into `-[WKContentView pasteForWebView:]`). There are a few
>+        possibilities here:
>+        1. WKWebView's `-paste:` action is not overridden. In this case, we will call back into `-pasteForWebView:`,
>+           which will notice that we have a pending paste completion handler and invoke it.
>+        2. WKWebView's `-paste:` action is overridden and does not call back into the content view. In this case, we
>+           will invoke the paste completion handler in `-_didPerformAction:sender:`.
>+        3. WKWebView's `-canPerformAction:withSender:` is overridden to include additional actions. In this case, we may
>+           get a call to invoke a different action selector while waiting for a potential paste action. If this happens,
>+           prevent the programmatic paste in `-_willPerformAction:sender:` prior to handling the other action.
>+
>+        (-[WKContentView handleKeyWebEvent:withCompletionHandler:]):
>+
>+        Dismiss programmatic paste UI upon handling any key event.
>+
>+        (-[WKContentView showGlobalMenuControllerInRect:]):
>+        (-[WKContentView hideGlobalMenuController]):
>+
>+        Helper methods to present and dismiss the global UIMenuController, that accounts for available platform APIs for
>+        presenting or dismissing the menu controller on iOS.
>+
>+        (-[WKContentView _requestProgrammaticClipboardAccessWithElementRect:completionHandler:]):
>+        (-[WKContentView _resetShowingTextStyle:]): Deleted.
>+
>+        Rename this to `-_didHideMenu:`.
>+
>+        * UIProcess/mac/PageClientImplMac.h:
>+        * UIProcess/win/PageClientImpl.cpp:
>+        (WebKit::PageClientImpl::requestProgrammaticClipboardAccess):
>+        * UIProcess/win/PageClientImpl.h:
>+        * WebProcess/WebCoreSupport/WebEditorClient.cpp:
>+        (WebKit::WebEditorClient::requestProgrammaticClipboardAccess):
>+        * WebProcess/WebCoreSupport/WebEditorClient.h:
>+        * WebProcess/WebPage/WebPage.cpp:
>+        (WebKit::WebPage::requestProgrammaticClipboardAccess):
>+
>+        Add more plumbing and method stubs.
>+
>+        (WebKit::WebPage::rectForElementAtInteractionLocation const):
>+        * WebProcess/WebPage/WebPage.h:
>+        * WebProcess/WebPage/ios/WebPageIOS.mm:
>+        (WebKit::WebPage::rectForElementAtInteractionLocation const):
>+        (WebKit::WebPage::rectForElementAtInteractionLocation): Deleted.
>+
>+        Mark this method as const, add a platform-agnostic stub, and adopt it for the purposes of determining where to
>+        position the callout bar when pasting.
>+
> 2019-02-04  Michael Catanzaro  <mcatanzaro@igalia.com>
> 
>         Unreviewed, avoid -Wswitch warnings introduced in r240880
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index 33d630cece425aa3d8e3d8110d2a8f444c91b86d..d9eff3d718f2646651aab1ebad936a7b7780266d 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,15 @@
>+2019-02-05  Wenson Hsieh  <wenson_hsieh@apple.com>
>+
>+        Allow pages to trigger programmatic paste from script on iOS
>+        https://bugs.webkit.org/show_bug.cgi?id=194271
>+        <rdar://problem/47808810>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        See WebCore and WebKit ChangeLogs for more details.
>+
>+        * WebCoreSupport/WebEditorClient.h:
>+
> 2019-02-03  Simon Fraser  <simon.fraser@apple.com>
> 
>         Make setNeedsLayout on the root more explicitly about triggering its side-effects
>diff --git a/Source/WebKitLegacy/win/ChangeLog b/Source/WebKitLegacy/win/ChangeLog
>index ab77a87ccc1c490b92640979310815480a1557ac..3c8b1155201a69ba8eced212b10f0b827def7f4d 100644
>--- a/Source/WebKitLegacy/win/ChangeLog
>+++ b/Source/WebKitLegacy/win/ChangeLog
>@@ -1,3 +1,13 @@
>+2019-02-05  Wenson Hsieh  <wenson_hsieh@apple.com>
>+
>+        Allow pages to trigger programmatic paste from script on iOS
>+        https://bugs.webkit.org/show_bug.cgi?id=194271
>+        <rdar://problem/47808810>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * WebCoreSupport/WebEditorClient.h:
>+
> 2019-02-03  Ryosuke Niwa  <rniwa@webkit.org>
> 
>         Validate navigation policy decisions to avoid crashes in continueLoadAfterNavigationPolicy
>diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
>index 50bccefcde471977ce9bf431e310104a809b9e2a..b116f20eca377a38f1048ccda269f5b648762e16 100644
>--- a/Source/WebCore/dom/Document.cpp
>+++ b/Source/WebCore/dom/Document.cpp
>@@ -64,6 +64,7 @@
> #include "DocumentType.h"
> #include "Editing.h"
> #include "Editor.h"
>+#include "EditorClient.h"
> #include "ElementIterator.h"
> #include "EventHandler.h"
> #include "ExtensionStyleSheets.h"
>@@ -534,6 +535,7 @@ Document::Document(Frame* frame, const URL& url, unsigned documentClasses, unsig
>     , m_isNonRenderedPlaceholder(constructionFlags & NonRenderedPlaceholder)
>     , m_orientationNotifier(currentOrientation(frame))
>     , m_identifier(DocumentIdentifier::generate())
>+    , m_programmaticClipboardAccessResetTimer(*this, &Document::programmaticClipboardAccessTimerFired)
>     , m_undoManager(UndoManager::create(*this))
> {
>     auto addResult = allDocumentsMap().add(m_identifier, this);
>@@ -5492,6 +5494,29 @@ static Editor::Command command(Document* document, const String& commandName, bo
>         userInterface ? CommandFromDOMWithUserInterface : CommandFromDOM);
> }
> 
>+bool Document::hasGrantedProgrammaticClipboardAccess() const
>+{
>+    return m_programmaticClipboardAccess == ProgrammaticClipboardAccess::Granted;
>+}
>+
>+bool Document::hasDeniedProgrammaticClipboardAccess() const
>+{
>+    return m_programmaticClipboardAccess == ProgrammaticClipboardAccess::Denied;
>+}
>+
>+void Document::didRequestProgrammaticClipboardAccess(bool granted)
>+{
>+    m_programmaticClipboardAccess = granted ? ProgrammaticClipboardAccess::Granted : ProgrammaticClipboardAccess::Denied;
>+
>+    if (!m_programmaticClipboardAccessResetTimer.isActive())
>+        m_programmaticClipboardAccessResetTimer.startOneShot(0_s);
>+}
>+
>+void Document::programmaticClipboardAccessTimerFired()
>+{
>+    m_programmaticClipboardAccess = ProgrammaticClipboardAccess::Pending;
>+}
>+
> bool Document::execCommand(const String& commandName, bool userInterface, const String& value)
> {
>     EventQueueScope eventQueueScope;
>@@ -6247,6 +6272,9 @@ void Document::suspendScheduledTasks(ReasonForSuspension reason)
>     m_applyPendingXSLTransformsTimer.stop();
> #endif
> 
>+    m_programmaticClipboardAccessResetTimer.stop();
>+    m_programmaticClipboardAccess = ProgrammaticClipboardAccess::Pending;
>+
>     // Deferring loading and suspending parser is necessary when we need to prevent re-entrant JavaScript execution
>     // (e.g. while displaying an alert).
>     // It is not currently possible to suspend parser unless loading is deferred, because new data arriving from network
>diff --git a/Source/WebCore/dom/Document.h b/Source/WebCore/dom/Document.h
>index 8e2878f4d15ab8515067a3aa5da3f25731102d03..9afd229bf6f182b8eecf6977115c78fb433fe9e9 100644
>--- a/Source/WebCore/dom/Document.h
>+++ b/Source/WebCore/dom/Document.h
>@@ -1550,6 +1550,10 @@ public:
>     void setAlwaysAllowLocalWebarchive() { m_alwaysAllowLocalWebarchive = true; }
>     bool alwaysAllowLocalWebarchive() const { return m_alwaysAllowLocalWebarchive; }
> 
>+    bool hasGrantedProgrammaticClipboardAccess() const;
>+    bool hasDeniedProgrammaticClipboardAccess() const;
>+    void didRequestProgrammaticClipboardAccess(bool granted);
>+
> protected:
>     enum ConstructionFlags { Synthesized = 1, NonRenderedPlaceholder = 1 << 1 };
>     Document(Frame*, const URL&, unsigned = DefaultDocumentClass, unsigned constructionFlags = 0);
>@@ -1684,6 +1688,8 @@ private:
> 
>     bool isBodyPotentiallyScrollable(HTMLBodyElement&);
> 
>+    void programmaticClipboardAccessTimerFired();
>+
>     const Ref<Settings> m_settings;
> 
>     UniqueRef<Quirks> m_quirks;
>@@ -2109,6 +2115,10 @@ private:
> 
>     bool m_alwaysAllowLocalWebarchive { false };
> 
>+    enum class ProgrammaticClipboardAccess : uint8_t { Pending, Denied, Granted };
>+    ProgrammaticClipboardAccess m_programmaticClipboardAccess { ProgrammaticClipboardAccess::Pending };
>+    Timer m_programmaticClipboardAccessResetTimer;
>+
>     Ref<UndoManager> m_undoManager;
> };
> 
>diff --git a/Source/WebCore/editing/EditorCommand.cpp b/Source/WebCore/editing/EditorCommand.cpp
>index 0b3bbb9be69569eb82cf054dc24c715e7e4ad438..c53139706f797ddd3bb608f48634b2638f05931a 100644
>--- a/Source/WebCore/editing/EditorCommand.cpp
>+++ b/Source/WebCore/editing/EditorCommand.cpp
>@@ -53,6 +53,7 @@
> #include "Pasteboard.h"
> #include "RenderBox.h"
> #include "ReplaceSelectionCommand.h"
>+#include "RuntimeEnabledFeatures.h"
> #include "Scrollbar.h"
> #include "Settings.h"
> #include "StyleProperties.h"
>@@ -908,8 +909,13 @@ static bool executePaste(Frame& frame, Event*, EditorCommandSource source, const
>     if (source == CommandFromMenuOrKeyBinding) {
>         UserTypingGestureIndicator typingGestureIndicator(frame);
>         frame.editor().paste();
>-    } else
>-        frame.editor().paste();
>+        return true;
>+    }
>+
>+    if (!frame.requestProgrammaticClipboardAccess())
>+        return false;
>+
>+    frame.editor().paste();
>     return true;
> }
> 
>@@ -934,8 +940,13 @@ static bool executePasteAndMatchStyle(Frame& frame, Event*, EditorCommandSource
>     if (source == CommandFromMenuOrKeyBinding) {
>         UserTypingGestureIndicator typingGestureIndicator(frame);
>         frame.editor().pasteAsPlainText();
>-    } else
>-        frame.editor().pasteAsPlainText();
>+        return true;
>+    }
>+
>+    if (!frame.requestProgrammaticClipboardAccess())
>+        return false;
>+
>+    frame.editor().pasteAsPlainText();
>     return true;
> }
> 
>@@ -944,8 +955,13 @@ static bool executePasteAsPlainText(Frame& frame, Event*, EditorCommandSource so
>     if (source == CommandFromMenuOrKeyBinding) {
>         UserTypingGestureIndicator typingGestureIndicator(frame);
>         frame.editor().pasteAsPlainText();
>-    } else
>-        frame.editor().pasteAsPlainText();
>+        return true;
>+    }
>+
>+    if (!frame.requestProgrammaticClipboardAccess())
>+        return false;
>+
>+    frame.editor().pasteAsPlainText();
>     return true;
> }
> 
>@@ -954,8 +970,13 @@ static bool executePasteAsQuotation(Frame& frame, Event*, EditorCommandSource so
>     if (source == CommandFromMenuOrKeyBinding) {
>         UserTypingGestureIndicator typingGestureIndicator(frame);
>         frame.editor().pasteAsQuotation();
>-    } else
>-        frame.editor().pasteAsQuotation();
>+        return true;
>+    }
>+
>+    if (!frame.requestProgrammaticClipboardAccess())
>+        return false;
>+
>+    frame.editor().pasteAsQuotation();
>     return true;
> }
> 
>@@ -1220,7 +1241,8 @@ static bool supportedPaste(Frame* frame)
>     if (!frame)
>         return false;
> 
>-    bool defaultValue = frame->settings().javaScriptCanAccessClipboard() && frame->settings().DOMPasteAllowed();
>+    auto& settings = frame->settings();
>+    bool defaultValue = (settings.javaScriptCanAccessClipboard() && settings.DOMPasteAllowed()) || RuntimeEnabledFeatures::sharedFeatures().programmaticClipboardAccessRequestEnabled();
> 
>     EditorClient* client = frame->editor().client();
>     return client ? client->canPaste(frame, defaultValue) : defaultValue;
>diff --git a/Source/WebCore/loader/EmptyClients.cpp b/Source/WebCore/loader/EmptyClients.cpp
>index b58322168ff5aa4db2c8b3d4cff89e53be29c96a..e7b84a27536c272e84dd90966a8015d8780d59e7 100644
>--- a/Source/WebCore/loader/EmptyClients.cpp
>+++ b/Source/WebCore/loader/EmptyClients.cpp
>@@ -190,6 +190,8 @@ private:
>     void registerRedoStep(UndoStep&) final;
>     void clearUndoRedoOperations() final { }
> 
>+    bool requestProgrammaticClipboardAccess() final { return false; }
>+
>     bool canCopyCut(Frame*, bool defaultValue) const final { return defaultValue; }
>     bool canPaste(Frame*, bool defaultValue) const final { return defaultValue; }
>     bool canUndo() const final { return false; }
>diff --git a/Source/WebCore/page/EditorClient.h b/Source/WebCore/page/EditorClient.h
>index 37bf1823a98c2d9e52f3d02cbf5bcffaee358c44..ee519df4b9fcc7ab0785cffefb9f94af56cba48a 100644
>--- a/Source/WebCore/page/EditorClient.h
>+++ b/Source/WebCore/page/EditorClient.h
>@@ -98,6 +98,8 @@ public:
>     virtual void requestCandidatesForSelection(const VisibleSelection&) { }
>     virtual void handleAcceptedCandidateWithSoftSpaces(TextCheckingResult) { }
> 
>+    virtual bool requestProgrammaticClipboardAccess() = 0;
>+
>     // Notify an input method that a composition was voluntarily discarded by WebCore, so that it could clean up too.
>     // This function is not called when a composition is closed per a request from an input method.
>     virtual void discardedComposition(Frame*) = 0;
>diff --git a/Source/WebCore/page/Frame.cpp b/Source/WebCore/page/Frame.cpp
>index a4f83b27f0b6ecaf653321d6a554457ece669daa..1f766e2bff7011070c5bafa4ff1ad60e3d8d0a9b 100644
>--- a/Source/WebCore/page/Frame.cpp
>+++ b/Source/WebCore/page/Frame.cpp
>@@ -95,6 +95,7 @@
> #include "TextResourceDecoder.h"
> #include "UserContentController.h"
> #include "UserContentURLPattern.h"
>+#include "UserGestureIndicator.h"
> #include "UserScript.h"
> #include "UserTypingGestureIndicator.h"
> #include "VisibleUnits.h"
>@@ -658,6 +659,32 @@ bool Frame::selectionChangeCallbacksDisabled() const
> }
> #endif // PLATFORM(IOS_FAMILY)
> 
>+bool Frame::requestProgrammaticClipboardAccess()
>+{
>+    if (m_settings->javaScriptCanAccessClipboard() && m_settings->DOMPasteAllowed())
>+        return true;
>+
>+    if (!RuntimeEnabledFeatures::sharedFeatures().programmaticClipboardAccessRequestEnabled() || !UserGestureIndicator::processingUserGesture())
>+        return false;
>+
>+    if (!m_doc)
>+        return false;
>+
>+    if (m_doc->hasGrantedProgrammaticClipboardAccess())
>+        return true;
>+
>+    if (m_doc->hasDeniedProgrammaticClipboardAccess())
>+        return false;
>+
>+    auto* client = m_editor->client();
>+    if (!client)
>+        return false;
>+
>+    bool granted = client->requestProgrammaticClipboardAccess();
>+    m_doc->didRequestProgrammaticClipboardAccess(granted);
>+    return granted;
>+}
>+
> void Frame::setPrinting(bool printing, const FloatSize& pageSize, const FloatSize& originalPageSize, float maximumShrinkRatio, AdjustViewSizeOrNot shouldAdjustViewSize)
> {
>     if (!view())
>diff --git a/Source/WebCore/page/Frame.h b/Source/WebCore/page/Frame.h
>index 8ad13d6e1ccc27a638157d811ab1cf48ce2e2069..fc6c036a6290d46c79c5b8f4fd64b05f735d14f1 100644
>--- a/Source/WebCore/page/Frame.h
>+++ b/Source/WebCore/page/Frame.h
>@@ -175,6 +175,8 @@ public:
>     bool hasHadUserInteraction() const { return m_hasHadUserInteraction; }
>     void setHasHadUserInteraction() { m_hasHadUserInteraction = true; }
> 
>+    bool requestProgrammaticClipboardAccess();
>+
> // ======== All public functions below this point are candidates to move out of Frame into another class. ========
> 
>     WEBCORE_EXPORT void injectUserScripts(UserScriptInjectionTime);
>diff --git a/Source/WebCore/page/RuntimeEnabledFeatures.h b/Source/WebCore/page/RuntimeEnabledFeatures.h
>index 0f7e7a500450a6506df3e28d3ca934fc0cc0763a..d8cac9ae5d84e616f6ec43b041593f70ec1459ef 100644
>--- a/Source/WebCore/page/RuntimeEnabledFeatures.h
>+++ b/Source/WebCore/page/RuntimeEnabledFeatures.h
>@@ -344,6 +344,9 @@ public:
>     bool adClickAttributionEnabled() const { return m_adClickAttributionEnabled; }
>     void setAdClickAttributionEnabled(bool isEnabled) { m_adClickAttributionEnabled = isEnabled; }
> 
>+    bool programmaticClipboardAccessRequestEnabled() const { return m_programmaticClipboardAccessRequestEnabled; }
>+    void setProgrammaticClipboardAccessRequestEnabled(bool enabled) { m_programmaticClipboardAccessRequestEnabled = enabled; }
>+
>     WEBCORE_EXPORT static RuntimeEnabledFeatures& sharedFeatures();
> 
> private:
>@@ -521,6 +524,8 @@ private:
> 
>     bool m_adClickAttributionEnabled { false };
> 
>+    bool m_programmaticClipboardAccessRequestEnabled { false };
>+
>     friend class WTF::NeverDestroyed<RuntimeEnabledFeatures>;
> };
> 
>diff --git a/Source/WebKit/Shared/WebPreferences.yaml b/Source/WebKit/Shared/WebPreferences.yaml
>index cce4ace8356325e7a0a00e523f9e4c992f9152ff..f9500bc1a359cd255a59c4fed74d985f385a7536 100644
>--- a/Source/WebKit/Shared/WebPreferences.yaml
>+++ b/Source/WebKit/Shared/WebPreferences.yaml
>@@ -1534,6 +1534,14 @@ AdClickAttributionEnabled:
>   webcoreBinding: RuntimeEnabledFeatures
>   category: internal
> 
>+ProgrammaticClipboardAccessRequestEnabled:
>+  type: bool
>+  defaultValue: DEFAULT_PROGRAMMATIC_CLIPBOARD_ACCESS_REQUEST_ENABLED
>+  humanReadableName: "Programmatic clipboard access"
>+  humanReadableDescription: "Enable programmatic clipboard access"
>+  webcoreBinding: RuntimeEnabledFeatures
>+  category: internal
>+
> # Deprecated
> 
> ICECandidateFilteringEnabled:
>diff --git a/Source/WebKit/Shared/WebPreferencesDefaultValues.h b/Source/WebKit/Shared/WebPreferencesDefaultValues.h
>index 0a52167c20fa5ae0404734784a49ec91c9106ff7..79502be8d5fea0b20a74643bc244daecebf3ac6a 100644
>--- a/Source/WebKit/Shared/WebPreferencesDefaultValues.h
>+++ b/Source/WebKit/Shared/WebPreferencesDefaultValues.h
>@@ -242,3 +242,9 @@ bool defaultCustomPasteboardDataEnabled();
> #define DEFAULT_INPUT_TYPE_COLOR_ENABLED true
> #define DEFAULT_DATALIST_ELEMENT_ENABLED true
> #endif
>+
>+#if PLATFORM(IOS)
>+#define DEFAULT_PROGRAMMATIC_CLIPBOARD_ACCESS_REQUEST_ENABLED true
>+#else
>+#define DEFAULT_PROGRAMMATIC_CLIPBOARD_ACCESS_REQUEST_ENABLED false
>+#endif
>diff --git a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
>index 317859d75335e7ddca0307204dcce5e4de1e012e..8308dd5d41829c56ad3990b18eace6791a07fcdd 100644
>--- a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
>+++ b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.cpp
>@@ -473,4 +473,9 @@ bool PageClientImpl::decidePolicyForInstallMissingMediaPluginsPermissionRequest(
> }
> #endif
> 
>+void PageClientImpl::requestProgrammaticClipboardAccess(const IntRect&, CompletionHandler<void(bool)>&& completionHandler)
>+{
>+    completionHandler(false);
>+}
>+
> } // namespace WebKit
>diff --git a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h
>index 6dea8f39fd8151d464ce64a15e530ce96f9c4de3..e78475af10aa855bb744f621a9161a08e3dbbc5c 100644
>--- a/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h
>+++ b/Source/WebKit/UIProcess/API/gtk/PageClientImpl.h
>@@ -145,6 +145,8 @@ private:
> 
>     void didFinishProcessingAllPendingMouseEvents() final { }
> 
>+    void requestProgrammaticClipboardAccess(const WebCore::IntRect&, CompletionHandler<void(bool)>&&) final;
>+
> #if ENABLE(VIDEO) && USE(GSTREAMER)
>     bool decidePolicyForInstallMissingMediaPluginsPermissionRequest(InstallMissingMediaPluginsPermissionRequest&) override;
> #endif
>diff --git a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp
>index 22336150feabf8c40638ffa905cc4217b84014fd..45f194bdca4c88acaba34b0cb4dd5c21fad21347 100644
>--- a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp
>+++ b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.cpp
>@@ -384,4 +384,9 @@ void PageClientImpl::beganExitFullScreen(const WebCore::IntRect& /* initialFrame
> 
> #endif // ENABLE(FULLSCREEN_API)
> 
>+void PageClientImpl::requestProgrammaticClipboardAccess(const WebCore::IntRect&, CompletionHandler<void(bool)>&& completionHandler)
>+{
>+    completionHandler(false);
>+}
>+
> } // namespace WebKit
>diff --git a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h
>index b699f29f9b2870a6be0b3ffb44a7896e23f85c46..b2cccc58f291bfaf675b96bef9d7cd0f66b0875d 100644
>--- a/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h
>+++ b/Source/WebKit/UIProcess/API/wpe/PageClientImpl.h
>@@ -143,6 +143,8 @@ private:
> 
>     void didFinishProcessingAllPendingMouseEvents() final { }
> 
>+    void requestProgrammaticClipboardAccess(const WebCore::IntRect&, CompletionHandler<void(bool)>&&) final;
>+
>     WebCore::UserInterfaceLayoutDirection userInterfaceLayoutDirection() override;
> 
>     WKWPE::View& m_view;
>diff --git a/Source/WebKit/UIProcess/PageClient.h b/Source/WebKit/UIProcess/PageClient.h
>index 38c6552bb1e8a95d02a1822387a0228300f0eb80..c96640769a4c90a0eb87e78592e946a8285885cc 100644
>--- a/Source/WebKit/UIProcess/PageClient.h
>+++ b/Source/WebKit/UIProcess/PageClient.h
>@@ -465,6 +465,8 @@ public:
>     virtual void didChangeDragCaretRect(const WebCore::IntRect& previousCaretRect, const WebCore::IntRect& caretRect) = 0;
> #endif
> 
>+    virtual void requestProgrammaticClipboardAccess(const WebCore::IntRect& elementRect, CompletionHandler<void(bool)>&&) = 0;
>+
> #if ENABLE(ATTACHMENT_ELEMENT)
>     virtual void didInsertAttachment(API::Attachment&, const String& source) { }
>     virtual void didRemoveAttachment(API::Attachment&) { }
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.cpp b/Source/WebKit/UIProcess/WebPageProxy.cpp
>index 6a15c801beafdc6ad2d8d5fc42cd707c31d2fbf1..3cfcd0f0cde9f7fe738ccd8cd73af94aef1dcb6a 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.cpp
>+++ b/Source/WebKit/UIProcess/WebPageProxy.cpp
>@@ -5438,6 +5438,11 @@ void WebPageProxy::setNeedsPlainTextQuirk(bool needsPlainTextQuirk)
>     m_needsPlainTextQuirk = needsPlainTextQuirk;
> }
> 
>+void WebPageProxy::requestProgrammaticClipboardAccess(const WebCore::IntRect& elementRect, CompletionHandler<void(bool)>&& completionHandler)
>+{
>+    m_pageClient->requestProgrammaticClipboardAccess(elementRect, WTFMove(completionHandler));
>+}
>+
> // BackForwardList
> 
> void WebPageProxy::backForwardAddItem(BackForwardListItemState&& itemState)
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.h b/Source/WebKit/UIProcess/WebPageProxy.h
>index a7f9c5d18cc3f56974b36c261b85f3668ed77248..5d105d53354f1972610e0ee6e02bfeb6c5eed59f 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.h
>+++ b/Source/WebKit/UIProcess/WebPageProxy.h
>@@ -1650,6 +1650,8 @@ private:
>     void setNeedsHiddenContentEditableQuirk(bool);
>     void setNeedsPlainTextQuirk(bool);
> 
>+    void requestProgrammaticClipboardAccess(const WebCore::IntRect&, CompletionHandler<void(bool)>&&);
>+
>     // Back/Forward list management
>     void backForwardAddItem(BackForwardListItemState&&);
>     void backForwardGoToItem(const WebCore::BackForwardItemIdentifier&, SandboxExtension::Handle&);
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.messages.in b/Source/WebKit/UIProcess/WebPageProxy.messages.in
>index 7875eab4311314a4d87a92207d512e53de28ec71..baa5a79a2dea17d3d771c2a765b930af40cc226c 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.messages.in
>+++ b/Source/WebKit/UIProcess/WebPageProxy.messages.in
>@@ -254,6 +254,7 @@ messages -> WebPageProxy {
>     SetHasHadSelectionChangesFromUserInteraction(bool hasHadUserSelectionChanges)
>     SetNeedsHiddenContentEditableQuirk(bool needsHiddenContentEditableQuirk)
>     SetNeedsPlainTextQuirk(bool needsPlainTextQuirk)
>+    RequestProgrammaticClipboardAccess(WebCore::IntRect elementRect) -> (bool granted) Delayed
> 
>     # Find messages
>     DidCountStringMatches(String string, uint32_t matchCount)
>diff --git a/Source/WebKit/UIProcess/ios/PageClientImplIOS.h b/Source/WebKit/UIProcess/ios/PageClientImplIOS.h
>index a3c6d3af89d506677958704dd901667db41e96e1..2b6c4fd2dd9d6a0ac487ed73dd5464ec7ff1e301 100644
>--- a/Source/WebKit/UIProcess/ios/PageClientImplIOS.h
>+++ b/Source/WebKit/UIProcess/ios/PageClientImplIOS.h
>@@ -224,6 +224,8 @@ private:
>     void requestPasswordForQuickLookDocument(const String& fileName, WTF::Function<void(const String&)>&&) override;
> #endif
> 
>+    void requestProgrammaticClipboardAccess(const WebCore::IntRect& elementRect, CompletionHandler<void(bool)>&&) final;
>+
> #if ENABLE(DATA_INTERACTION)
>     void didPerformDragOperation(bool handled) override;
>     void didHandleDragStartRequest(bool started) override;
>diff --git a/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm b/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm
>index 1509cc27429943acbdc35a68f255f9eebbad6272..5c8d42ba96c69dd9d305e923657238e08e902b37 100644
>--- a/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm
>+++ b/Source/WebKit/UIProcess/ios/PageClientImplIOS.mm
>@@ -837,6 +837,11 @@ void PageClientImpl::requestPasswordForQuickLookDocument(const String& fileName,
> }
> #endif
> 
>+void PageClientImpl::requestProgrammaticClipboardAccess(const WebCore::IntRect& elementRect, CompletionHandler<void(bool)>&& completionHandler)
>+{
>+    [m_contentView _requestProgrammaticClipboardAccessWithElementRect:elementRect completionHandler:WTFMove(completionHandler)];
>+}
>+
> #if HAVE(PENCILKIT)
> RetainPtr<WKDrawingView> PageClientImpl::createDrawingView(WebCore::GraphicsLayer::EmbeddedViewID embeddedViewID)
> {
>diff --git a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h
>index fad0bcbae2833bfe1fd7fc9551f46c857dbdea01..4d8e0a847d06b4b394cf5f22698630e7fa58705d 100644
>--- a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h
>+++ b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.h
>@@ -49,6 +49,7 @@
> #import <WebCore/Color.h>
> #import <WebCore/FloatQuad.h>
> #import <wtf/BlockPtr.h>
>+#import <wtf/CompletionHandler.h>
> #import <wtf/Forward.h>
> #import <wtf/OptionSet.h>
> #import <wtf/Vector.h>
>@@ -317,6 +318,7 @@ struct WKAutoCorrectionData {
>     BOOL _focusRequiresStrongPasswordAssistance;
> 
>     BOOL _hasSetUpInteractions;
>+    CompletionHandler<void(bool)> _programmaticPasteCompletionHandler;
> 
> #if ENABLE(DATA_INTERACTION)
>     WebKit::DragDropInteractionState _dragDropInteractionState;
>@@ -438,6 +440,8 @@ FOR_EACH_PRIVATE_WKCONTENTVIEW_ACTION(DECLARE_WKCONTENTVIEW_ACTION_FOR_WEB_VIEW)
> - (void)_accessibilityClearSelection;
> - (WKFormInputSession *)_formInputSession;
> 
>+- (void)_requestProgrammaticClipboardAccessWithElementRect:(const WebCore::IntRect&)elementRect completionHandler:(CompletionHandler<void(bool)>&&)completionHandler;
>+
> @property (nonatomic, readonly) WebKit::InteractionInformationAtPosition currentPositionInformation;
> - (void)doAfterPositionInformationUpdate:(void (^)(WebKit::InteractionInformationAtPosition))action forRequest:(WebKit::InteractionInformationRequest)request;
> - (BOOL)ensurePositionInformationIsUpToDate:(WebKit::InteractionInformationRequest)request;
>diff --git a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm
>index 2122840b323f43ee08c884407b6eed629d5e4811..e6e6ed706f67f6ef67dd2b2cb21ffc0df14f4144 100644
>--- a/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm
>+++ b/Source/WebKit/UIProcess/ios/WKContentViewInteraction.mm
>@@ -742,7 +742,7 @@ - (void)setupInteraction
> #endif
> 
>     NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
>-    [center addObserver:self selector:@selector(_resetShowingTextStyle:) name:UIMenuControllerDidHideMenuNotification object:nil];
>+    [center addObserver:self selector:@selector(_didHideMenu:) name:UIMenuControllerDidHideMenuNotification object:nil];
>     [center addObserver:self selector:@selector(_keyboardDidRequestDismissal:) name:UIKeyboardPrivateDidRequestDismissalNotification object:nil];
> 
>     _showingTextStyleOptions = NO;
>@@ -888,6 +888,7 @@ - (void)cleanupInteraction
> #if ENABLE(POINTER_EVENTS)
>     [self _resetPanningPreventionFlags];
> #endif
>+    [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
> }
> 
> - (void)_removeDefaultGestureRecognizers
>@@ -1140,8 +1141,10 @@ - (BOOL)resignFirstResponderForWebView
> 
>     bool superDidResign = [super resignFirstResponder];
> 
>-    if (superDidResign)
>+    if (superDidResign) {
>         _page->activityStateDidChange(WebCore::ActivityState::IsFocused);
>+        [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
>+    }
> 
>     return superDidResign;
> }
>@@ -1170,8 +1173,10 @@ - (void)_webTouchEventsRecognized:(UIWebTouchEventsGestureRecognizer *)gestureRe
>     const _UIWebTouchEvent* lastTouchEvent = gestureRecognizer.lastTouchEvent;
> 
>     _lastInteractionLocation = lastTouchEvent->locationInDocumentCoordinates;
>-    if (lastTouchEvent->type == UIWebTouchEventTouchBegin)
>+    if (lastTouchEvent->type == UIWebTouchEventTouchBegin) {
>+        [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
>         _layerTreeTransactionIdAtLastTouchStart = downcast<WebKit::RemoteLayerTreeDrawingAreaProxy>(*_page->drawingArea()).lastCommittedLayerTreeTransactionID();
>+    }
> 
> #if ENABLE(TOUCH_EVENTS)
>     WebKit::NativeWebTouchEvent nativeWebTouchEvent(lastTouchEvent);
>@@ -1988,6 +1993,9 @@ - (BOOL)textInteractionGesture:(UIWKGestureType)gesture shouldBeginAtPoint:(CGPo
>     if (!_webView.configuration._textInteractionGesturesEnabled)
>         return NO;
> 
>+    if (_programmaticPasteCompletionHandler)
>+        return NO;
>+
>     if (_suppressSelectionAssistantReasons)
>         return NO;
> 
>@@ -2413,7 +2421,10 @@ - (NSArray *)supportedPasteboardTypesForCurrentSelection
> #define FORWARD_ACTION_TO_WKWEBVIEW(_action) \
>     - (void)_action:(id)sender \
>     { \
>+        SEL action = @selector(_action:);\
>+        [self _willPerformAction:action sender:sender];\
>         [_webView _action:sender]; \
>+        [self _didPerformAction:action sender:sender];\
>     }
> 
> FOR_EACH_WKCONTENTVIEW_ACTION(FORWARD_ACTION_TO_WKWEBVIEW)
>@@ -2658,11 +2669,17 @@ - (void)tintColorDidChange
> 
> - (BOOL)canPerformAction:(SEL)action withSender:(id)sender
> {
>+    if (_programmaticPasteCompletionHandler)
>+        return action == @selector(paste:);
>+
>     return [_webView canPerformAction:action withSender:sender];
> }
> 
> - (BOOL)canPerformActionForWebView:(SEL)action withSender:(id)sender
> {
>+    if (_programmaticPasteCompletionHandler)
>+        return action == @selector(paste:);
>+
>     if (action == @selector(_nextAccessoryTab:))
>         return hasFocusedElement(_focusedElementInformation) && _focusedElementInformation.hasNextNode;
>     if (action == @selector(_previousAccessoryTab:))
>@@ -2809,10 +2826,11 @@ - (id)targetForActionForWebView:(SEL)action withSender:(id)sender
>     return [super targetForAction:action withSender:sender];
> }
> 
>-- (void)_resetShowingTextStyle:(NSNotification *)notification
>+- (void)_didHideMenu:(NSNotification *)notification
> {
>     _showingTextStyleOptions = NO;
>     [_textSelectionAssistant hideTextStyleOptions];
>+    [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
> }
> 
> - (void)_keyboardDidRequestDismissal:(NSNotification *)notification
>@@ -2834,6 +2852,9 @@ - (void)cutForWebView:(id)sender
> 
> - (void)pasteForWebView:(id)sender
> {
>+    if (sender == UIMenuController.sharedMenuController && [self _invokeProgrammaticPasteCompletionHandlerWithResult:YES])
>+        return;
>+
>     _page->executeEditCommand("paste"_s);
> }
> 
>@@ -2963,6 +2984,28 @@ - (void)_accessibilityClearSelection
>     _page->storeSelectionForAccessibility(false);
> }
> 
>+- (BOOL)_invokeProgrammaticPasteCompletionHandlerWithResult:(BOOL)allowPaste
>+{
>+    if (auto pasteHandler = WTFMove(_programmaticPasteCompletionHandler)) {
>+        [self hideGlobalMenuController];
>+        pasteHandler(allowPaste);
>+        return YES;
>+    }
>+    return NO;
>+}
>+
>+- (void)_willPerformAction:(SEL)action sender:(id)sender
>+{
>+    if (action != @selector(paste:))
>+        [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
>+}
>+
>+- (void)_didPerformAction:(SEL)action sender:(id)sender
>+{
>+    if (action == @selector(paste:))
>+        [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
>+}
>+
> // UIWKInteractionViewProtocol
> 
> static inline WebKit::GestureType toGestureType(UIWKGestureType gestureType)
>@@ -4126,6 +4169,8 @@ - (void)handleKeyWebEvent:(::WebEvent *)theEvent
> 
> - (void)handleKeyWebEvent:(::WebEvent *)theEvent withCompletionHandler:(void (^)(::WebEvent *theEvent, BOOL wasHandled))completionHandler
> {
>+    [self _invokeProgrammaticPasteCompletionHandlerWithResult:NO];
>+
>     _keyWebEventHandler = makeBlockPtr(completionHandler);
>     _page->handleKeyboardEvent(WebKit::NativeWebKeyboardEvent(theEvent));
> }
>@@ -4821,6 +4866,47 @@ - (void)_didUpdateInputMode:(WebCore::InputMode)mode
> #endif
> }
> 
>+- (void)showGlobalMenuControllerInRect:(CGRect)rect
>+{
>+    UIMenuController *controller = UIMenuController.sharedMenuController;
>+#if HAVE(MENU_CONTROLLER_SHOW_HIDE_API)
>+    [controller showMenuFromView:self rect:rect];
>+#else
>+    [controller setTargetRect:rect inView:self];
>+    [controller setMenuVisible:YES animated:YES];
>+#endif
>+}
>+
>+- (void)hideGlobalMenuController
>+{
>+    UIMenuController *controller = UIMenuController.sharedMenuController;
>+#if HAVE(MENU_CONTROLLER_SHOW_HIDE_API)
>+    [controller hideMenuFromView:self];
>+#else
>+    [controller setMenuVisible:NO animated:YES];
>+#endif
>+}
>+
>+- (void)_requestProgrammaticClipboardAccessWithElementRect:(const WebCore::IntRect&)elementRect completionHandler:(CompletionHandler<void(bool)>&&)completionHandler
>+{
>+    if (auto existingCompletionHandler = std::exchange(_programmaticPasteCompletionHandler, WTFMove(completionHandler))) {
>+        ASSERT_NOT_REACHED();
>+        existingCompletionHandler(false);
>+    }
>+
>+    WebCore::IntRect menuControllerRect = elementRect;
>+
>+    const CGFloat maximumElementWidth = 300;
>+    const CGFloat maximumElementHeight = 120;
>+    if (elementRect.isEmpty() || elementRect.width() > maximumElementWidth || elementRect.height() > maximumElementHeight) {
>+        const CGFloat interactionLocationMargin = 10;
>+        menuControllerRect = { WebCore::IntPoint(_lastInteractionLocation), { } };
>+        menuControllerRect.inflate(interactionLocationMargin);
>+    }
>+
>+    [self showGlobalMenuControllerInRect:menuControllerRect];
>+}
>+
> - (void)_didReceiveEditorStateUpdateAfterFocus
> {
>     [self _updateInitialWritingDirectionIfNecessary];
>diff --git a/Source/WebKit/UIProcess/mac/PageClientImplMac.h b/Source/WebKit/UIProcess/mac/PageClientImplMac.h
>index 4707a0202e42a828d5a50ed58be4e30f3a88a0b9..46f6a35b8c3ea8a29c570b4628b559df4f72f603 100644
>--- a/Source/WebKit/UIProcess/mac/PageClientImplMac.h
>+++ b/Source/WebKit/UIProcess/mac/PageClientImplMac.h
>@@ -30,6 +30,7 @@
> #include "CorrectionPanel.h"
> #include "PageClientImplCocoa.h"
> #include "WebFullScreenManagerProxy.h"
>+#include <wtf/CompletionHandler.h>
> #include <wtf/RetainPtr.h>
> 
> @class WKEditorUndoTarget;
>@@ -215,6 +216,8 @@ private:
>     void willRecordNavigationSnapshot(WebBackForwardListItem&) override;
>     void didRemoveNavigationGestureSnapshot() override;
> 
>+    void requestProgrammaticClipboardAccess(const WebCore::IntRect&, CompletionHandler<void(bool)>&& completion) final { completion(false); }
>+
>     NSView *activeView() const;
>     NSWindow *activeWindow() const;
> 
>diff --git a/Source/WebKit/UIProcess/win/PageClientImpl.cpp b/Source/WebKit/UIProcess/win/PageClientImpl.cpp
>index 170c2d7763962af02f32b4f8b5ed029b679f6ff1..4f273cb7a5cf13aa4e10a9210871372b4f8117fb 100644
>--- a/Source/WebKit/UIProcess/win/PageClientImpl.cpp
>+++ b/Source/WebKit/UIProcess/win/PageClientImpl.cpp
>@@ -357,4 +357,9 @@ HWND PageClientImpl::viewWidget()
>     return m_view.window();
> }
> 
>+void PageClientImpl::requestProgrammaticClipboardAccess(const IntRect&, CompletionHandler<void(bool)>&& completionHandler)
>+{
>+    completionHandler(false);
>+}
>+
> } // namespace WebKit
>diff --git a/Source/WebKit/UIProcess/win/PageClientImpl.h b/Source/WebKit/UIProcess/win/PageClientImpl.h
>index 66572bb14058aacff5fac3fdd75106c8b075ef5a..c2fade701c24ae62bb75516f201396b71a8c9202 100644
>--- a/Source/WebKit/UIProcess/win/PageClientImpl.h
>+++ b/Source/WebKit/UIProcess/win/PageClientImpl.h
>@@ -142,6 +142,8 @@ private:
> 
>     void didFinishProcessingAllPendingMouseEvents() final { }
> 
>+    void requestProgrammaticClipboardAccess(const WebCore::IntRect&, CompletionHandler<void(bool)>&&) final;
>+
>     // Members of PageClientImpl class
>     DefaultUndoController m_undoController;
> 
>diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.cpp b/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.cpp
>index 8f2181bebf181c3dcd787fb4b9fbd620c9d00d7f..258f3b76f578468a292124148b5f58429806a70a 100644
>--- a/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.cpp
>+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.cpp
>@@ -359,6 +359,11 @@ void WebEditorClient::redo()
>     m_page->sendSync(Messages::WebPageProxy::ExecuteUndoRedo(UndoOrRedo::Redo), Messages::WebPageProxy::ExecuteUndoRedo::Reply());
> }
> 
>+bool WebEditorClient::requestProgrammaticClipboardAccess()
>+{
>+    return m_page->requestProgrammaticClipboardAccess();
>+}
>+
> #if PLATFORM(WIN)
> void WebEditorClient::handleKeyboardEvent(KeyboardEvent* event)
> {
>diff --git a/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.h b/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.h
>index 4720b71175412a59a229bc47106dab2da3c8756e..cd846faedc851bff60ea30e4e9c5103d4867ee9f 100644
>--- a/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.h
>+++ b/Source/WebKit/WebProcess/WebCoreSupport/WebEditorClient.h
>@@ -89,6 +89,8 @@ private:
>     void registerRedoStep(WebCore::UndoStep&) final;
>     void clearUndoRedoOperations() final;
> 
>+    bool requestProgrammaticClipboardAccess() final;
>+
>     bool canCopyCut(WebCore::Frame*, bool defaultValue) const final;
>     bool canPaste(WebCore::Frame*, bool defaultValue) const final;
>     bool canUndo() const final;
>diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.cpp b/Source/WebKit/WebProcess/WebPage/WebPage.cpp
>index 512128abae0e3c97cf17dbfbbc519b8c42be92e3..6f4d1d77164ff494f20ad34556d826c0c5035da8 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebPage.cpp
>+++ b/Source/WebKit/WebProcess/WebPage/WebPage.cpp
>@@ -6423,6 +6423,15 @@ void WebPage::didCompleteShareSheet(bool wasGranted, ShareSheetCallbackID callba
>     callback(wasGranted);
> }
> 
>+bool WebPage::requestProgrammaticClipboardAccess()
>+{
>+    bool granted = false;
>+    if (!sendSyncWithDelayedReply(Messages::WebPageProxy::RequestProgrammaticClipboardAccess(rectForElementAtInteractionLocation()), Messages::WebPageProxy::RequestProgrammaticClipboardAccess::Reply(granted)))
>+        return false;
>+
>+    return granted;
>+}
>+
> void WebPage::simulateDeviceOrientationChange(double alpha, double beta, double gamma)
> {
> #if ENABLE(DEVICE_ORIENTATION) && PLATFORM(IOS_FAMILY)
>@@ -6496,7 +6505,16 @@ void WebPage::didFinishLoadingApplicationManifest(uint64_t coreCallbackID, const
> void WebPage::updateCurrentModifierState(OptionSet<PlatformEvent::Modifier> modifiers)
> {
>     PlatformKeyboardEvent::setCurrentModifierState(modifiers);
>-}    
>+}
>+
>+#if !PLATFORM(IOS_FAMILY)
>+
>+WebCore::IntRect WebPage::rectForElementAtInteractionLocation() const
>+{
>+    return { };
>+}
>+
>+#endif // !PLATFORM(IOS_FAMILY)
> 
> } // namespace WebKit
> 
>diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.h b/Source/WebKit/WebProcess/WebPage/WebPage.h
>index c711456905f650d73aa3ef51771945d6f2de0b70..af36f227bbe4649e480c037c3627cb035b7aca49 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebPage.h
>+++ b/Source/WebKit/WebProcess/WebPage/WebPage.h
>@@ -657,7 +657,6 @@ public:
>     void setFocusedElementValue(const String&);
>     void setFocusedElementValueAsNumber(double);
>     void setFocusedElementSelectedIndex(uint32_t index, bool allowMultipleSelection);
>-    WebCore::IntRect rectForElementAtInteractionLocation();
>     void updateSelectionAppearance();
>     void getSelectionContext(CallbackID);
>     void handleTwoFingerTapAtPoint(const WebCore::IntPoint&, uint64_t requestID);
>@@ -1144,6 +1143,9 @@ public:
>         return sendSync(WTFMove(message), WTFMove(reply), m_pageID, Seconds::infinity(), IPC::SendSyncOption::InformPlatformProcessWillSuspend);
>     }
> 
>+    bool requestProgrammaticClipboardAccess();
>+    WebCore::IntRect rectForElementAtInteractionLocation() const;
>+
> private:
>     WebPage(uint64_t pageID, WebPageCreationParameters&&);
> 
>diff --git a/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm b/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>index 5d1b1dd90697cf80c4819a2a3e6964041b8eb825..aeca58cd2417834e889ff82892db77368f7d64ca 100644
>--- a/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>+++ b/Source/WebKit/WebProcess/WebPage/ios/WebPageIOS.mm
>@@ -517,7 +517,7 @@ void WebPage::advanceToNextMisspelling(bool)
>     notImplemented();
> }
> 
>-IntRect WebPage::rectForElementAtInteractionLocation()
>+IntRect WebPage::rectForElementAtInteractionLocation() const
> {
>     HitTestResult result = m_page->mainFrame().eventHandler().hitTestResultAtPoint(m_lastInteractionLocation, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::AllowChildFrameContent);
>     Node* hitNode = result.innerNode();
>diff --git a/Source/WebKitLegacy/mac/WebCoreSupport/WebEditorClient.h b/Source/WebKitLegacy/mac/WebCoreSupport/WebEditorClient.h
>index f0f968b7e2b66c891dc14b6c1faaf0b8bbe1d19e..6415c86e4a21baccc13ab947f543d819dcabfc14 100644
>--- a/Source/WebKitLegacy/mac/WebCoreSupport/WebEditorClient.h
>+++ b/Source/WebKitLegacy/mac/WebCoreSupport/WebEditorClient.h
>@@ -81,6 +81,7 @@ private:
>     String replacementURLForResource(Ref<WebCore::SharedBuffer>&& resourceData, const String& mimeType) final;
> 
>     void setInsertionPasteboard(const String&) final;
>+    bool requestProgrammaticClipboardAccess() final { return false; }
> 
> #if USE(APPKIT)
>     void uppercaseWord() final;
>diff --git a/Source/WebKitLegacy/win/WebCoreSupport/WebEditorClient.h b/Source/WebKitLegacy/win/WebCoreSupport/WebEditorClient.h
>index 7a6edde8193613859a31d2f0d2ebb35f822c5d2b..ab7994b19bb1351d00c849deb8094f4866363256 100644
>--- a/Source/WebKitLegacy/win/WebCoreSupport/WebEditorClient.h
>+++ b/Source/WebKitLegacy/win/WebCoreSupport/WebEditorClient.h
>@@ -115,6 +115,8 @@ private:
>     void requestCheckingOfString(WebCore::TextCheckingRequest&, const WebCore::VisibleSelection&) final { }
>     bool performTwoStepDrop(WebCore::DocumentFragment&, WebCore::Range&, bool) final { return false; }
> 
>+    bool requestProgrammaticClipboardAccess() final { return false; }
>+
>     WebCore::TextCheckerClient* textChecker() final { return this; }
> 
>     WebView* m_webView;

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Attachments on bug 194271: 361202 | 361212 | 361252 | 361305 | 361306 | 361316 | 361350 | 361351 | 361397 | 361398 | 361537 | 361547 | 361582 | 361702 | 361837 | 361847