PixelPaint: Allow pasting a copied bitmap as a new layer :^)

Applications/PixelPaint/Image.cpp

@@ -71,6 +71,8 @@ void Image::add_layer(NonnullRefPtr<Layer> layer)
 
     for (auto* client : m_clients)
         client->image_did_add_layer(m_layers.size() - 1);
+
+    did_modify_layer_stack();
 }
 
 size_t Image::index_of(const Layer& layer) const

Applications/PixelPaint/Layer.cpp

@@ -41,6 +41,17 @@ RefPtr<Layer> Layer::create_with_size(Image& image, const Gfx::IntSize& size, co
     return adopt(*new Layer(image, size, name));
 }
 
+RefPtr<Layer> Layer::create_with_bitmap(Image& image, const Gfx::Bitmap& bitmap, const String& name)
+{
+    if (bitmap.size().is_empty())
+        return nullptr;
+
+    if (bitmap.size().width() > 16384 || bitmap.size().height() > 16384)
+        return nullptr;
+
+    return adopt(*new Layer(image, bitmap, name));
+}
+
 Layer::Layer(Image& image, const Gfx::IntSize& size, const String& name)
     : m_image(image)
     , m_name(name)
@@ -48,6 +59,13 @@ Layer::Layer(Image& image, const Gfx::IntSize& size, const String& name)
     m_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGBA32, size);
 }
 
+Layer::Layer(Image& image, const Gfx::Bitmap& bitmap, const String& name)
+    : m_image(image)
+    , m_name(name)
+    , m_bitmap(bitmap)
+{
+}
+
 void Layer::did_modify_bitmap(Image& image)
 {
     image.layer_did_modify_bitmap({}, *this);

Applications/PixelPaint/Layer.h

@@ -45,6 +45,7 @@ class Layer
 
 public:
     static RefPtr<Layer> create_with_size(Image&, const Gfx::IntSize&, const String& name);
+    static RefPtr<Layer> create_with_bitmap(Image&, const Gfx::Bitmap&, const String& name);
 
     ~Layer() { }
 
@@ -75,7 +76,8 @@ public:
     void set_opacity_percent(int);
 
 private:
-    explicit Layer(Image&, const Gfx::IntSize&, const String& name);
+    Layer(Image&, const Gfx::IntSize&, const String& name);
+    Layer(Image&, const Gfx::Bitmap&, const String& name);
 
     Image& m_image;
 

Applications/PixelPaint/main.cpp

@@ -42,6 +42,7 @@
 #include <LibGUI/Action.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/BoxLayout.h>
+#include <LibGUI/Clipboard.h>
 #include <LibGUI/FilePicker.h>
 #include <LibGUI/Icon.h>
 #include <LibGUI/Menu.h>
@@ -126,7 +127,17 @@ int main(int argc, char** argv)
         return;
     }));
 
-    menubar->add_menu("Edit");
+    auto& edit_menu = menubar->add_menu("Edit");
+    edit_menu.add_action(GUI::CommonActions::make_paste_action([&](auto&) {
+
+        ASSERT(image_editor.image());
+        auto bitmap = GUI::Clipboard::the().bitmap();
+        if (!bitmap)
+            return;
+
+        auto layer = PixelPaint::Layer::create_with_bitmap(*image_editor.image(), *bitmap, "Pasted layer");
+        image_editor.image()->add_layer(layer.release_nonnull());
+    }));
 
     auto& tool_menu = menubar->add_menu("Tool");
     toolbox.for_each_tool([&](auto& tool) {