Impl xcb cursor manager.

3 files changed, 44 insertions, 4 deletions

diff --git a/src/platform/gui/xcb/CMakeLists.txt b/src/platform/gui/xcb/CMakeLists.txt
index 15bf1a79..fa5cc0bf 100644
--- a/src/platform/gui/xcb/CMakeLists.txt
+++ b/src/platform/gui/xcb/CMakeLists.txt
@@ -1,5 +1,6 @@
 find_library(LIBRARY_CAIRO cairo REQUIRED)
 find_library(LIBRARY_XCB xcb REQUIRED)
+find_library(LIBRARY_XCB_CURSOR xcb-cursor REQUIRED)
 add_library(CruPlatformGuiXcb
 	Cursor.cpp
 	Keyboard.cpp
@@ -8,5 +9,5 @@ add_library(CruPlatformGuiXcb
 )
 target_link_libraries(CruPlatformGuiXcb PUBLIC
 	CruPlatformGui CruPlatformGraphicsCairo
-	${LIBRARY_XCB} ${LIBRARY_CAIRO}
+	${LIBRARY_XCB} ${LIBRARY_XCB_CURSOR} ${LIBRARY_CAIRO}
 )
diff --git a/src/platform/gui/xcb/Cursor.cpp b/src/platform/gui/xcb/Cursor.cpp
index 7bc73f6d..5582c6a6 100644
--- a/src/platform/gui/xcb/Cursor.cpp
+++ b/src/platform/gui/xcb/Cursor.cpp
@@ -1,12 +1,13 @@
 #include "cru/platform/gui/xcb/Cursor.h"
-#include "cru/base/Base.h"
+#include "cru/base/Exception.h"
+#include "cru/platform/gui/Cursor.h"
 #include "cru/platform/gui/xcb/UiApplication.h"
 
 #include <xcb/xcb.h>
+#include <xcb/xcb_cursor.h>
+#include <memory>
 
 namespace cru::platform::gui::xcb {
-XcbCursor* XcbCursor::LoadXCursor(io::Stream* stream) { NotImplemented(); }
-
 XcbCursor::XcbCursor(XcbUiApplication* application, xcb_cursor_t cursor,
                      bool auto_free)
     : application_(application), cursor_(cursor), auto_free_(auto_free) {}
@@ -19,4 +20,35 @@ XcbCursor::~XcbCursor() {
 
 xcb_cursor_t XcbCursor::GetXcbCursor() { return cursor_; }
 
+XcbCursorManager::XcbCursorManager(XcbUiApplication* application)
+    : application_(application) {
+  auto code = xcb_cursor_context_new(application->GetXcbConnection(),
+                                     application->GetFirstXcbScreen(),
+                                     &xcb_cursor_context_);
+  if (code != 0) {
+    throw PlatformException("Failed to call xcb_cursor_context_new.");
+  }
+
+  cursors_[SystemCursorType::Arrow] =
+      std::make_shared<XcbCursor>(application_, XCB_CURSOR_NONE, false);
+  cursors_[SystemCursorType::Hand] = LoadXCursor("pointer");
+  cursors_[SystemCursorType::IBeam] = LoadXCursor("ibeam");
+}
+
+XcbCursorManager::~XcbCursorManager() {
+  xcb_cursor_context_free(xcb_cursor_context_);
+}
+
+std::shared_ptr<ICursor> XcbCursorManager::GetSystemCursor(
+    SystemCursorType type) {
+  return cursors_[type];
+}
+
+std::shared_ptr<XcbCursor> XcbCursorManager::LoadXCursor(
+    std::string_view name) {
+  return std::make_shared<XcbCursor>(
+      application_, xcb_cursor_load_cursor(xcb_cursor_context_, name.data()),
+      true);
+}
+
 }  // namespace cru::platform::gui::xcb
diff --git a/src/platform/gui/xcb/UiApplication.cpp b/src/platform/gui/xcb/UiApplication.cpp
index 74b20bd7..b95e669a 100644
--- a/src/platform/gui/xcb/UiApplication.cpp
+++ b/src/platform/gui/xcb/UiApplication.cpp
@@ -2,6 +2,7 @@
 
 #include "cru/platform/graphics/cairo/CairoGraphicsFactory.h"
 #include "cru/platform/gui/Window.h"
+#include "cru/platform/gui/xcb/Cursor.h"
 #include "cru/platform/gui/xcb/Window.h"
 
 #include <poll.h>
@@ -30,9 +31,13 @@ XcbUiApplication::XcbUiApplication(
   const xcb_setup_t *setup = xcb_get_setup(connection);
   xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup);
   this->screen_ = iter.data;
+
+  cursor_manager_ = new XcbCursorManager(this);
 }
 
 XcbUiApplication::~XcbUiApplication() {
+  delete cursor_manager_;
+
   xcb_disconnect(this->xcb_connection_);
   if (release_cairo_factory_) {
     delete cairo_factory_;
@@ -137,6 +142,8 @@ XcbUiApplication::GetGraphicsFactory() {
   return cairo_factory_;
 }
 
+ICursorManager *XcbUiApplication::GetCursorManager() { return cursor_manager_; }
+
 IMenu *XcbUiApplication::GetApplicationMenu() { return nullptr; }
 
 void XcbUiApplication::RegisterWindow(XcbWindow *window) {