[UnifiedPDF] PDFPluginBase should send cursor updates to the web page

https://bugs.webkit.org/show_bug.cgi?id=264913
rdar://118483364

Reviewed by Tim Horton.

In preparation to get cursor updates working for `UnifiedPDFPlugin`, we
should move `PDFPlugin::notifyCursorChanged` up into the `PDFPluginBase`
structure. We should be doing the same (trivial) amount of work for both
PDF plugin types to send cursor updates to the web page.

* Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.h:
* Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm:
(toWebCoreCursorType):
(-[WKPDFLayerControllerDelegate setMouseCursor:]):
(WebKit::PDFPlugin::notifySelectionChanged):
(WebKit::coreCursor): Deleted.
(WebKit::PDFPlugin::notifyCursorChanged): Deleted.
* Source/WebKit/WebProcess/Plugins/PDF/PDFPluginBase.h:
* Source/WebKit/WebProcess/Plugins/PDF/PDFPluginBase.mm:
(WebKit::PDFPluginBase::notifyCursorChanged):

Canonical link: https://commits.webkit.org/270863@main

Author: aprotyas

Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.h

@@ -98,7 +98,6 @@ class PDFPlugin final : public PDFPluginBase {
     void notifyDisplayModeChanged(int);
 
     void notifySelectionChanged(PDFSelection *);
-    void notifyCursorChanged(uint64_t /* PDFLayerControllerCursorType */);
 
     // HUD Actions.
 #if ENABLE(PDF_HUD)

Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm

@@ -428,6 +428,18 @@ - (id)initWithPDFPlugin:(WebKit::PDFPlugin *)plugin;
 
 @end
 
+static WebCore::Cursor::Type toWebCoreCursorType(PDFLayerControllerCursorType cursorType)
+{
+    switch (cursorType) {
+    case kPDFLayerControllerCursorTypePointer: return WebCore::Cursor::Type::Pointer;
+    case kPDFLayerControllerCursorTypeHand: return WebCore::Cursor::Type::Hand;
+    case kPDFLayerControllerCursorTypeIBeam: return WebCore::Cursor::Type::IBeam;
+    }
+
+    RELEASE_ASSERT_NOT_REACHED();
+    return WebCore::Cursor::Type::Pointer;
+}
+
 @implementation WKPDFLayerControllerDelegate
 
 @synthesize pdfPlugin = _pdfPlugin;
@@ -519,7 +531,7 @@ - (void)pdfLayerController:(PDFLayerController *)pdfLayerController didUpdateLay
 
 - (void)setMouseCursor:(PDFLayerControllerCursorType)cursorType
 {
-    _pdfPlugin->notifyCursorChanged(cursorType);
+    _pdfPlugin->notifyCursorChanged(toWebCoreCursorType(cursorType));
 }
 
 - (void)didChangeAnnotationState
@@ -2292,27 +2304,6 @@ static bool getEventTypeFromWebEvent(const WebEvent& event, NSEventType& eventTy
     m_frame->page()->didChangeSelection(*m_frame->coreLocalFrame());
 }
 
-static const WebCore::Cursor& coreCursor(PDFLayerControllerCursorType type)
-{
-    switch (type) {
-    case kPDFLayerControllerCursorTypeHand:
-        return WebCore::handCursor();
-    case kPDFLayerControllerCursorTypeIBeam:
-        return WebCore::iBeamCursor();
-    case kPDFLayerControllerCursorTypePointer:
-    default:
-        return WebCore::pointerCursor();
-    }
-}
-
-void PDFPlugin::notifyCursorChanged(uint64_t type)
-{
-    if (!m_frame || !m_frame->page())
-        return;
-
-    m_frame->page()->send(Messages::WebPageProxy::SetCursor(coreCursor(static_cast<PDFLayerControllerCursorType>(type))));
-}
-
 String PDFPlugin::getSelectionString() const
 {
     return [[m_pdfLayerController currentSelection] string];

Source/WebKit/WebProcess/Plugins/PDF/PDFPluginBase.h

@@ -54,6 +54,7 @@ class HTMLPlugInElement;
 class ResourceResponse;
 class Scrollbar;
 class SharedBuffer;
+enum class PlatformCursorType : uint8_t;
 }
 
 namespace WebKit {
@@ -167,6 +168,8 @@ class PDFPluginBase : public ThreadSafeRefCounted<PDFPluginBase>, public WebCore
     virtual void openWithPreview(CompletionHandler<void(const String&, FrameInfoData&&, const IPC::DataReference&, const String&)>&&) = 0;
 #endif
 
+    void notifyCursorChanged(WebCore::PlatformCursorType);
+
 protected:
     explicit PDFPluginBase(WebCore::HTMLPlugInElement&);
 

Source/WebKit/WebProcess/Plugins/PDF/PDFPluginBase.mm

@@ -28,14 +28,17 @@
 
 #if ENABLE(PDF_PLUGIN)
 
+#import "MessageSenderInlines.h"
 #import "PluginView.h"
 #import "WebEventConversion.h"
 #import "WebFrame.h"
 #import "WebPage.h"
+#import "WebPageProxyMessages.h"
 #import <CoreFoundation/CoreFoundation.h>
 #import <WebCore/AXObjectCache.h>
 #import <WebCore/ArchiveResource.h>
 #import <WebCore/Chrome.h>
+#import <WebCore/Cursor.h>
 #import <WebCore/Document.h>
 #import <WebCore/FocusController.h>
 #import <WebCore/Frame.h>
@@ -558,6 +561,14 @@
 
 #endif // ENABLE(PDF_HUD)
 
+void PDFPluginBase::notifyCursorChanged(WebCore::PlatformCursorType cursorType)
+{
+    if (!m_frame || !m_frame->page())
+        return;
+
+    m_frame->protectedPage()->send(Messages::WebPageProxy::SetCursor(WebCore::Cursor::fromType(cursorType)));
+}
+
 } // namespace WebKit
 
 #endif // ENABLE(PDF_PLUGIN)