xdpw: added a screencast chooser (#396)

* xdpw: added a screencast chooser
* xdpw: output screenshots
* xdpw: toplevel screenshots (by @soreau)
---------

Co-authored-by: Scott Moreau <oreaus@gmail.com>

Author: trigg

data/meson.build

@@ -15,4 +15,6 @@ install_data(join_paths('icons', 'scalable', 'wayfire.svg'), install_dir: join_p
 
 install_data('wf-locker', install_dir:'/etc/pam.d/')
 
+install_data('xdpw/wayfire', install_dir: '/etc/xdg/xdg-desktop-portal-wlr/')
+
 subdir('css')

data/xdpw/wayfire

@@ -0,0 +1,3 @@
+[screencast]
+chooser_cmd=wf-stream-chooser
+chooser_type=simple

proto/meson.build

@@ -1,5 +1,4 @@
-wl_protocol_dir = wayland_protos.get_pkgconfig_variable('pkgdatadir')
-
+wl_protocol_dir = wayland_protos.get_variable(pkgconfig: 'pkgdatadir', internal: 'pkgdatadir')
 wayland_scanner = find_program('wayland-scanner')
 
 wayland_scanner_code = generator(
@@ -15,25 +14,26 @@ wayland_scanner_client = generator(
 )
 
 client_protocols = [
-    'wlr-foreign-toplevel-management-unstable-v1.xml',
-    'wlr-screencopy.xml',
-    wayfire.get_pkgconfig_variable('pkgdatadir') / 'unstable' / 'wayfire-shell-unstable-v2.xml',
+    [wl_protocol_dir, 'unstable/xdg-output/xdg-output-unstable-v1.xml'],
+    [wl_protocol_dir, 'unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml'],
+    [wl_protocol_dir, 'staging/ext-foreign-toplevel-list/ext-foreign-toplevel-list-v1.xml'],
+    [wl_protocol_dir, 'staging/ext-image-capture-source/ext-image-capture-source-v1.xml'],
+    [wl_protocol_dir, 'staging/ext-image-copy-capture/ext-image-copy-capture-v1.xml'],
+	'wlr-foreign-toplevel-management-unstable-v1.xml',
+	'wlr-screencopy.xml',
+	wayfire.get_pkgconfig_variable('pkgdatadir') / 'unstable' / 'wayfire-shell-unstable-v2.xml',
 ]
 
-if gbm.found() and drm.found() and not get_option('live-previews-dmabuf').disabled()
-    client_protocols += [join_paths(wl_protocol_dir, 'unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml')]
-endif
-
-wl_protos_src = []
+wl_protos_client_src = []
 wl_protos_headers = []
 
 foreach p : client_protocols
 	xml = join_paths(p)
+	wl_protos_client_src += wayland_scanner_code.process(xml)
 	wl_protos_headers += wayland_scanner_client.process(xml)
-	wl_protos_src += wayland_scanner_code.process(xml)
 endforeach
 
-lib_wl_protos = static_library('wl_protos', wl_protos_src + wl_protos_headers,
+lib_wl_protos = static_library('wl_protos', wl_protos_client_src + wl_protos_headers,
 	dependencies: [wayland_client]) # for the include directory
 
 wf_protos = declare_dependency(

src/meson.build

@@ -4,6 +4,7 @@ subdir('background')
 subdir('dock')
 subdir('locker')
 subdir('locker-pin')
+subdir('stream-chooser')
 
 pkgconfig = import('pkgconfig')
 pkgconfig.generate(

src/stream-chooser/mainlayout.cpp

@@ -0,0 +1,29 @@
+#include "mainlayout.hpp"
+void MainLayout::allocate_vfunc(const Gtk::Widget& widget, int width, int height, int baseline)
+{
+    Gtk::Widget& widget_not_const = const_cast<Gtk::Widget&>(widget);
+
+    auto inner = widget_not_const.get_children()[0];
+    auto alloc = Gtk::Allocation();
+    alloc.set_height(height / 2);
+    alloc.set_width(width / 2);
+    alloc.set_y(height / 4);
+    alloc.set_x(width / 4);
+    inner->size_allocate(alloc, -1);
+}
+
+void MainLayout::measure_vfunc(const Gtk::Widget& widget, Gtk::Orientation orientation,
+    int for_size, int& minimum, int& natural, int& minimum_baseline,
+    int& natural_baseline) const
+{
+    // Answer 1:1 aspect ratio
+    minimum = std::min(for_size, 300);
+    natural = std::min(for_size, 2000);
+    minimum_baseline = -1;
+    natural_baseline = -1;
+}
+
+Gtk::SizeRequestMode MainLayout::get_request_mode_vfunc(const Gtk::Widget& widget) const
+{
+    return Gtk::SizeRequestMode::WIDTH_FOR_HEIGHT;
+}

src/stream-chooser/mainlayout.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <gtkmm.h>
+#include <wf-option-wrap.hpp>
+
+
+class MainLayout : public Gtk::LayoutManager
+{
+  protected:
+    void allocate_vfunc(const Gtk::Widget& widget, int width, int height, int baseline) override;
+    void measure_vfunc(const Gtk::Widget& widget, Gtk::Orientation orientation, int for_size, int& minimum,
+        int& natural, int& minimum_baseline, int& natural_baseline) const override;
+    Gtk::SizeRequestMode get_request_mode_vfunc(const Gtk::Widget& widget) const override;
+    std::shared_ptr<Gtk::LayoutManager> layout;
+
+  public:
+    MainLayout()
+    {}
+};

src/stream-chooser/meson.build

@@ -0,0 +1,20 @@
+deps = [
+  gtkmm,
+  wf_protos,
+  wfconfig,
+  libutil,
+  gtklayershell,
+]
+
+executable(
+  'wf-stream-chooser',
+  [
+    'stream-chooser.cpp',
+    'toplevelwidget.cpp',
+    'outputwidget.cpp',
+    'toplevellayout.cpp',
+    'mainlayout.cpp',
+  ],
+  dependencies: deps,
+  install: true,
+)