LibWeb+LibWebView+WebContent: Add traverse_history_by_delta() IPC call

Author: https://github.com/kalenikaliaksandr
Commit: 0c839f0421
Pull-request: https://github.com/SerenityOS/serenity/pull/23952
Reviewed-by: https://github.com/trflynn89

Userland/Libraries/LibWeb/Page/Page.cpp

@@ -79,6 +79,11 @@ void Page::reload()
     top_level_traversable()->reload();
 }
 
+void Page::traverse_the_history_by_delta(int delta)
+{
+    top_level_traversable()->traverse_the_history_by_delta(delta);
+}
+
 Gfx::Palette Page::palette() const
 {
     return m_client->palette();

Userland/Libraries/LibWeb/Page/Page.h

@@ -78,6 +78,8 @@ public:
 
     void reload();
 
+    void traverse_the_history_by_delta(int delta);
+
     CSSPixelPoint device_to_css_point(DevicePixelPoint) const;
     DevicePixelPoint css_to_device_point(CSSPixelPoint) const;
     DevicePixelRect css_to_device_rect(CSSPixelRect) const;

Userland/Libraries/LibWebView/ViewImplementation.cpp

@@ -95,6 +95,11 @@ void ViewImplementation::reload()
     client().async_reload(page_id());
 }
 
+void ViewImplementation::traverse_the_history_by_delta(int delta)
+{
+    client().async_traverse_the_history_by_delta(page_id(), delta);
+}
+
 void ViewImplementation::zoom_in()
 {
     if (m_zoom_level >= ZOOM_MAX_LEVEL)

Userland/Libraries/LibWebView/ViewImplementation.h

@@ -50,6 +50,7 @@ public:
     void load_html(StringView);
     void load_empty_document();
     void reload();
+    void traverse_the_history_by_delta(int delta);
 
     void zoom_in();
     void zoom_out();

Userland/Services/WebContent/ConnectionFromClient.cpp

@@ -162,6 +162,12 @@ void ConnectionFromClient::reload(u64 page_id)
         page->page().reload();
 }
 
+void ConnectionFromClient::traverse_the_history_by_delta(u64 page_id, i32 delta)
+{
+    if (auto page = this->page(page_id); page.has_value())
+        page->page().traverse_the_history_by_delta(delta);
+}
+
 void ConnectionFromClient::set_viewport_rect(u64 page_id, Web::DevicePixelRect const& rect)
 {
     if (auto page = this->page(page_id); page.has_value())

Userland/Services/WebContent/ConnectionFromClient.h

@@ -58,6 +58,7 @@ private:
     virtual void load_url(u64 page_id, URL::URL const&) override;
     virtual void load_html(u64 page_id, ByteString const&) override;
     virtual void reload(u64 page_id) override;
+    virtual void traverse_the_history_by_delta(u64 page_id, i32 delta) override;
     virtual void set_viewport_rect(u64 page_id, Web::DevicePixelRect const&) override;
     virtual void key_event(u64 page_id, Web::KeyEvent const&) override;
     virtual void mouse_event(u64 page_id, Web::MouseEvent const&) override;

Userland/Services/WebContent/WebContentServer.ipc

@@ -25,6 +25,7 @@ endpoint WebContentServer
     load_url(u64 page_id, URL::URL url) =|
     load_html(u64 page_id, ByteString html) =|
     reload(u64 page_id) =|
+    traverse_the_history_by_delta(u64 page_id, i32 delta) =|
 
     add_backing_store(u64 page_id, i32 front_bitmap_id, Gfx::ShareableBitmap front_bitmap, i32 back_bitmap_id, Gfx::ShareableBitmap back_bitmap) =|
     ready_to_paint(u64 page_id) =|