initial commit

yup, i definitely wrote all of this in a single commit

1 files changed, 341 insertions, 0 deletions

diff --git a/src/widgets/limit-container.c b/src/widgets/limit-container.c
new file mode 100644
index 0000000..d0686ef
--- /dev/null
+++ b/src/widgets/limit-container.c
@@ -0,0 +1,341 @@
+#include "widgets/limit-container.h"
+
+//
+// FoobarLimitContainer:
+//
+// A container which uses the natural size requested by the child as its minimum size, but only up to a certain point.
+//
+// This is useful because gtk_scrolled_window_set_max_content_height doesn't seem to be doing what I understand it to
+// do. This way, we can set propagate_natural_height to TRUE and then limit the height through this container.
+//
+
+struct _FoobarLimitContainer
+{
+	GtkWidget  parent_instance;
+	GtkWidget* child;
+	gint       max_width;
+	gint       max_height;
+};
+
+enum
+{
+	PROP_CHILD = 1,
+	PROP_MAX_WIDTH,
+	PROP_MAX_HEIGHT,
+	N_PROPS,
+};
+
+static GParamSpec* props[N_PROPS] = { 0 };
+
+static void               foobar_limit_container_class_init      ( FoobarLimitContainerClass* klass );
+static void               foobar_limit_container_init            ( FoobarLimitContainer*      self );
+static void               foobar_limit_container_get_property    ( GObject*                   object,
+                                                                   guint                      prop_id,
+                                                                   GValue*                    value,
+                                                                   GParamSpec*                pspec );
+static void               foobar_limit_container_set_property    ( GObject*                   object,
+                                                                   guint                      prop_id,
+                                                                   GValue const*              value,
+                                                                   GParamSpec*                pspec );
+static void               foobar_limit_container_dispose         ( GObject*                   object );
+static GtkSizeRequestMode foobar_limit_container_get_request_mode( GtkWidget*                 widget );
+static void               foobar_limit_container_measure         ( GtkWidget*                 widget,
+                                                                   GtkOrientation             orientation,
+                                                                   int                        for_size,
+                                                                   int*                       minimum,
+                                                                   int*                       natural,
+                                                                   int*                       minimum_baseline,
+                                                                   int*                       natural_baseline );
+static void               foobar_limit_container_size_allocate   ( GtkWidget*                 widget,
+                                                                   int                        width,
+                                                                   int                        height,
+                                                                   int                        baseline );
+
+G_DEFINE_FINAL_TYPE( FoobarLimitContainer, foobar_limit_container, GTK_TYPE_WIDGET )
+
+// ---------------------------------------------------------------------------------------------------------------------
+// Widget Implementation
+// ---------------------------------------------------------------------------------------------------------------------
+
+//
+// Static initialization for limit containers.
+//
+void foobar_limit_container_class_init( FoobarLimitContainerClass* klass )
+{
+	GtkWidgetClass* widget_klass = GTK_WIDGET_CLASS( klass );
+	widget_klass->get_request_mode = foobar_limit_container_get_request_mode;
+	widget_klass->measure = foobar_limit_container_measure;
+	widget_klass->size_allocate = foobar_limit_container_size_allocate;
+	gtk_widget_class_set_css_name( widget_klass, "limit-container" );
+
+	GObjectClass* object_klass = G_OBJECT_CLASS( klass );
+	object_klass->get_property = foobar_limit_container_get_property;
+	object_klass->set_property = foobar_limit_container_set_property;
+	object_klass->dispose = foobar_limit_container_dispose;
+
+	props[PROP_CHILD] = g_param_spec_object(
+		"child",
+		"Child",
+		"Child widget for the panel item.",
+		GTK_TYPE_WIDGET,
+		G_PARAM_READWRITE );
+	props[PROP_MAX_WIDTH] = g_param_spec_int(
+		"max-width",
+		"Max Width",
+		"The maximum natural width supported as a minimum size.",
+		0,
+		INT_MAX,
+		0,
+		G_PARAM_READWRITE );
+	props[PROP_MAX_HEIGHT] = g_param_spec_int(
+		"max-height",
+		"Max Height",
+		"The maximum natural height supported as a minimum size.",
+		0,
+		INT_MAX,
+		0,
+		G_PARAM_READWRITE );
+	g_object_class_install_properties( object_klass, N_PROPS, props );
+}
+
+//
+// Instance initialization for limit containers.
+//
+void foobar_limit_container_init( FoobarLimitContainer* self )
+{
+	(void)self;
+}
+
+//
+// Property getter implementation, mapping a property id to a method.
+//
+void foobar_limit_container_get_property(
+	GObject*    object,
+	guint       prop_id,
+	GValue*     value,
+	GParamSpec* pspec )
+{
+	FoobarLimitContainer* self = (FoobarLimitContainer*)object;
+
+	switch ( prop_id )
+	{
+		case PROP_CHILD:
+			g_value_set_object( value, foobar_limit_container_get_child( self ) );
+			break;
+		case PROP_MAX_WIDTH:
+			g_value_set_int( value, foobar_limit_container_get_max_width( self ) );
+			break;
+		case PROP_MAX_HEIGHT:
+			g_value_set_int( value, foobar_limit_container_get_max_height( self ) );
+			break;
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID( object, prop_id, pspec );
+			break;
+	}
+}
+
+//
+// Property setter implementation, mapping a property id to a method.
+//
+void foobar_limit_container_set_property(
+	GObject*      object,
+	guint         prop_id,
+	GValue const* value,
+	GParamSpec*   pspec )
+{
+	FoobarLimitContainer* self = (FoobarLimitContainer*)object;
+
+	switch ( prop_id )
+	{
+		case PROP_CHILD:
+			foobar_limit_container_set_child( self, g_value_get_object( value ) );
+			break;
+		case PROP_MAX_WIDTH:
+			foobar_limit_container_set_max_width( self, g_value_get_int( value ) );
+			break;
+		case PROP_MAX_HEIGHT:
+			foobar_limit_container_set_max_height( self, g_value_get_int( value ) );
+			break;
+		default:
+			G_OBJECT_WARN_INVALID_PROPERTY_ID( object, prop_id, pspec );
+			break;
+	}
+}
+
+//
+// Instance de-initialization for limit containers.
+//
+void foobar_limit_container_dispose( GObject* object )
+{
+	FoobarLimitContainer* self = (FoobarLimitContainer*)object;
+
+	g_clear_pointer( &self->child, gtk_widget_unparent );
+
+	G_OBJECT_CLASS( foobar_limit_container_parent_class )->dispose( object );
+}
+
+//
+// Determine the size request mode used to measure the widget.
+//
+// This implementation just forwards the request mode from the child widget.
+//
+GtkSizeRequestMode foobar_limit_container_get_request_mode( GtkWidget* widget )
+{
+	FoobarLimitContainer* self = (FoobarLimitContainer*)widget;
+	if ( !self->child ) { return GTK_SIZE_REQUEST_CONSTANT_SIZE; }
+
+	return gtk_widget_get_request_mode( self->child );
+}
+
+//
+// Compute the requested size of the widget.
+//
+void foobar_limit_container_measure(
+	GtkWidget*     widget,
+	GtkOrientation orientation,
+	int            for_size,
+	int*           minimum,
+	int*           natural,
+	int*           minimum_baseline,
+	int*           natural_baseline )
+{
+	FoobarLimitContainer* self = (FoobarLimitContainer*)widget;
+	if ( !self->child )
+	{
+		*minimum = 0;
+		*natural = 0;
+		*minimum_baseline = 0;
+		*natural_baseline = 0;
+		return;
+	}
+
+	gtk_widget_measure( self->child, orientation, for_size, minimum, natural, minimum_baseline, natural_baseline );
+	gint natural_minimum = *natural;
+	switch ( orientation )
+	{
+		case GTK_ORIENTATION_HORIZONTAL:
+			natural_minimum = MIN( natural_minimum, self->max_width );
+			break;
+		case GTK_ORIENTATION_VERTICAL:
+			natural_minimum = MIN( natural_minimum, self->max_height );
+			break;
+		default:
+			g_warn_if_reached( );
+			break;
+	}
+	*minimum = MAX( *minimum, natural_minimum );
+}
+
+//
+// Arrange the child widget.
+//
+void foobar_limit_container_size_allocate(
+	GtkWidget* widget,
+	int        width,
+	int        height,
+	int        baseline )
+{
+	FoobarLimitContainer* self = (FoobarLimitContainer*)widget;
+	if ( !self->child ) { return; }
+
+	gtk_widget_allocate( self->child, width, height, baseline, NULL );
+}
+
+// ---------------------------------------------------------------------------------------------------------------------
+// Public API
+// ---------------------------------------------------------------------------------------------------------------------
+
+//
+// Create a new limit container instance.
+//
+GtkWidget* foobar_limit_container_new( void )
+{
+	return g_object_new( FOOBAR_TYPE_LIMIT_CONTAINER, NULL );
+}
+
+//
+// Get the container's child widget.
+//
+GtkWidget* foobar_limit_container_get_child( FoobarLimitContainer* self )
+{
+	g_return_val_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ), NULL );
+	return self->child;
+}
+
+//
+// Get the maximum natural width of the child to use as the minimum width for this container.
+//
+gint foobar_limit_container_get_max_width( FoobarLimitContainer* self )
+{
+	g_return_val_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ), 0 );
+	return self->max_width;
+}
+
+//
+// Get the maximum natural height of the child to use as the minimum height for this container.
+//
+gint foobar_limit_container_get_max_height( FoobarLimitContainer* self )
+{
+	g_return_val_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ), 0 );
+	return self->max_height;
+}
+
+//
+// Update the container's child widget.
+//
+void foobar_limit_container_set_child(
+	FoobarLimitContainer* self,
+	GtkWidget*            child )
+{
+	g_return_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ) );
+	g_return_if_fail( child == NULL || self->child == child || gtk_widget_get_parent( child ) == NULL );
+
+	if ( self->child != child )
+	{
+		g_clear_pointer( &self->child, gtk_widget_unparent );
+
+		if ( child )
+		{
+			self->child = child;
+			gtk_widget_set_parent( child, GTK_WIDGET( self ) );
+		}
+
+		g_object_notify_by_pspec( G_OBJECT( self ), props[PROP_CHILD] );
+	}
+}
+
+//
+// Update the maximum natural width of the child to use as the minimum width for this container.
+//
+void foobar_limit_container_set_max_width(
+	FoobarLimitContainer* self,
+	gint                  value )
+{
+	g_return_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ) );
+	g_return_if_fail( value >= 0 );
+
+	if ( self->max_width != value )
+	{
+		self->max_width = value;
+		gtk_widget_queue_resize( GTK_WIDGET( self ) );
+		g_object_notify_by_pspec( G_OBJECT( self ), props[PROP_MAX_WIDTH] );
+	}
+}
+
+//
+// Update the maximum natural height of the child to use as the minimum height for this container.
+//
+void foobar_limit_container_set_max_height(
+	FoobarLimitContainer* self,
+	gint                  value )
+{
+	g_return_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ) );
+	g_return_if_fail( value >= 0 );
+
+	if ( self->max_height != value )
+	{
+		self->max_height = value;
+		gtk_widget_queue_resize( GTK_WIDGET( self ) );
+		g_object_notify_by_pspec( G_OBJECT( self ), props[PROP_MAX_HEIGHT] );
+	}
+}
\ No newline at end of file