ptk-file-icon-renderer.c

台湾人开发的Linux下的文件管理器

/*
*  C Implementation: ptkfileiconrenderer
*
* Description: PtkFileIconRenderer is used to render file icons
*
*
* Author: Hong Jen Yee (PCMan) <pcman.tw (AT) gmail.com>, (C) 2006
*
* Copyright: See COPYING file that comes with this distribution
*
* Part of this class is taken from GtkCellRendererPixbuf written by
* Red Hat, Inc.,  Jonathan Blandford <[e-mail]>
*
*/


#include "ptk-file-icon-renderer.h"

static void
ptk_file_icon_renderer_init ( PtkFileIconRenderer *renderer );

static void
ptk_file_icon_renderer_class_init ( PtkFileIconRendererClass *klass );

static void
ptk_file_icon_renderer_get_property ( GObject *object,
                                      guint param_id,
                                      GValue *value,
                                      GParamSpec *pspec );

static void
ptk_file_icon_renderer_set_property ( GObject *object,
                                      guint param_id,
                                      const GValue *value,
                                      GParamSpec *pspec );

static void
ptk_file_icon_renderer_finalize ( GObject *gobject );


static void
ptk_file_icon_renderer_get_size ( GtkCellRenderer *cell,
                                  GtkWidget *widget,
                                  GdkRectangle *cell_area,
                                  gint *x_offset,
                                  gint *y_offset,
                                  gint *width,
                                  gint *height );


static void
ptk_file_icon_renderer_render ( GtkCellRenderer *cell,
                                GdkWindow *window,
                                GtkWidget *widget,
                                GdkRectangle *background_area,
                                GdkRectangle *cell_area,
                                GdkRectangle *expose_area,
                                guint flags );

enum
{
    PROP_INFO = 1,
    PROP_FLAGS,
    PROP_FOLLOW_STATE
};

static gpointer parent_class;

static GdkPixbuf* link_icon = NULL;

/* GdkPixbuf RGBA C-Source image dump */
#ifdef __SUNPRO_C
#pragma align 4 (link_icon_data)
#endif
#ifdef __GNUC__
static const guint8 link_icon_data[] __attribute__ ((__aligned__ (4))) =
#else
static const guint8 link_icon_data[] =
#endif
    { ""
      /* Pixbuf magic (0x47646b50) */
      "GdkP"
      /* length: header (24) + pixel_data (400) */
      "\0\0\1\250"
      /* pixdata_type (0x1010002) */
      "\1\1\0\2"
      /* rowstride (40) */
      "\0\0\0("
      /* width (10) */
      "\0\0\0\12"
      /* height (10) */
      "\0\0\0\12"
      /* pixel_data: */
      "\200\200\200\377\200\200\200\377\200\200\200\377\200\200\200\377\200"
      "\200\200\377\200\200\200\377\200\200\200\377\200\200\200\377\200\200"
      "\200\377\0\0\0\377\200\200\200\377\377\377\377\377\377\377\377\377\377"
      "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377"
      "\377\377\377\377\377\377\0\0\0\377\200\200\200\377\377\377\377\377\0"
      "\0\0\377\0\0\0\377\0\0\0\377\0\0\0\377\0\0\0\377\377\377\377\377\377"
      "\377\377\377\0\0\0\377\200\200\200\377\377\377\377\377\0\0\0\377\0\0"
      "\0\377\0\0\0\377\0\0\0\377\377\377\377\377\377\377\377\377\377\377\377"
      "\377\0\0\0\377\200\200\200\377\377\377\377\377\0\0\0\377\0\0\0\377\0"
      "\0\0\377\0\0\0\377\0\0\0\377\377\377\377\377\377\377\377\377\0\0\0\377"
      "\200\200\200\377\377\377\377\377\0\0\0\377\0\0\0\377\0\0\0\377\0\0\0"
      "\377\0\0\0\377\0\0\0\377\377\377\377\377\0\0\0\377\200\200\200\377\377"
      "\377\377\377\0\0\0\377\377\377\377\377\377\377\377\377\0\0\0\377\0\0"
      "\0\377\0\0\0\377\377\377\377\377\0\0\0\377\200\200\200\377\377\377\377"
      "\377\377\377\377\377\377\377\377\377\377\377\377\377\0\0\0\377\0\0\0"
      "\377\0\0\0\377\377\377\377\377\0\0\0\377\200\200\200\377\377\377\377"
      "\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377"
      "\377\377\377\377\377\377\377\377\377\377\377\377\0\0\0\377\0\0\0\377"
      "\0\0\0\377\0\0\0\377\0\0\0\377\0\0\0\377\0\0\0\377\0\0\0\377\0\0\0\377"
      "\0\0\0\377\0\0\0\377"
    };


/***************************************************************************
 *
 *  ptk_file_icon_renderer_get_type: here we register our type with
 *                                          the GObject type system if we
 *                                          haven't done so yet. Everything
 *                                          else is done in the callbacks.
 *
 ***************************************************************************/

GType
ptk_file_icon_renderer_get_type ( void )
{
    static GType renderer_type = 0;
    if ( G_UNLIKELY( !renderer_type ) )
    {
        static const GTypeInfo renderer_info =
            {
                sizeof ( PtkFileIconRendererClass ),
                NULL,                                                        /* base_init */
                NULL,                                                        /* base_finalize */
                ( GClassInitFunc ) ptk_file_icon_renderer_class_init,
                NULL,                                                        /* class_finalize */
                NULL,                                                        /* class_data */
                sizeof ( PtkFileIconRenderer ),
                0,                                                           /* n_preallocs */
                ( GInstanceInitFunc ) ptk_file_icon_renderer_init,
            };

        /* Derive from GtkCellRendererPixbuf */
        renderer_type = g_type_register_static ( GTK_TYPE_CELL_RENDERER_PIXBUF,
                                                 "PtkFileIconRenderer",
                                                 &renderer_info,
                                                 0 );
    }

    return renderer_type;
}


/***************************************************************************
 *
 *  ptk_file_icon_renderer_init: set some default properties of the
 *                                      parent (GtkCellRendererPixbuf).
 *
 ***************************************************************************/

static void
ptk_file_icon_renderer_init ( PtkFileIconRenderer *renderer )
{
    if ( !link_icon )
    {
        link_icon = gdk_pixbuf_new_from_inline(
                sizeof(link_icon_data),
                link_icon_data,
                FALSE, NULL );
        g_object_add_weak_pointer( G_OBJECT(link_icon), (gpointer)&link_icon  );
    }
    else
        gdk_pixbuf_ref( (link_icon) );
}


/***************************************************************************
 *
 *  ptk_file_icon_renderer_class_init:
 *
 ***************************************************************************/

static void
ptk_file_icon_renderer_class_init ( PtkFileIconRendererClass *klass )
{
    GtkCellRendererClass * parent_renderer_class = GTK_CELL_RENDERER_CLASS( klass );
    GObjectClass *object_class = G_OBJECT_CLASS( klass );

    parent_class = g_type_class_peek_parent ( klass );
    object_class->finalize = ptk_file_icon_renderer_finalize;

    /* Hook up functions to set and get our
    *   custom cell renderer properties */
    object_class->get_property = ptk_file_icon_renderer_get_property;
    object_class->set_property = ptk_file_icon_renderer_set_property;

    parent_renderer_class->get_size = ptk_file_icon_renderer_get_size;
    parent_renderer_class->render = ptk_file_icon_renderer_render;

    g_object_class_install_property ( object_class,
                                      PROP_INFO,
                                      g_param_spec_pointer ( "info",
                                                             "File info",
                                                             "File info",
                                                             G_PARAM_READWRITE ) );
    g_object_class_install_property ( object_class,
                                      PROP_FOLLOW_STATE,
                                      g_param_spec_boolean ( "follow-state",
                                                             "Follow State",
                                                             "Whether the rendered pixbuf should be "
                                                             "colorized according to the state",
                                                             FALSE,
                                                             G_PARAM_READWRITE ) );
}


/***************************************************************************
 *
 *  ptk_file_icon_renderer_finalize: free any resources here
 *
 ***************************************************************************/

static void
ptk_file_icon_renderer_finalize ( GObject *object )
{
    PtkFileIconRenderer* renderer = PTK_FILE_ICON_RENDERER(object); 
    if( renderer->info )
        vfs_file_info_unref( renderer->info );

    gdk_pixbuf_unref( (link_icon) );
    ( * G_OBJECT_CLASS ( parent_class ) ->finalize ) ( object );
}

/***************************************************************************
 *
 *  ptk_file_icon_renderer_get_property: as it says
 *
 ***************************************************************************/

static void
ptk_file_icon_renderer_get_property ( GObject *object,
                                      guint param_id,
                                      GValue *value,
                                      GParamSpec *psec )
{
    PtkFileIconRenderer * renderer = PTK_FILE_ICON_RENDERER( object );

    switch ( param_id )
    {
        /*    case PROP_FLAGS:
              g_value_set_long(value, renderer->flags);
              break;
        */
    case PROP_INFO:
        if( renderer->info )
            vfs_file_info_ref( renderer->info );
        g_value_set_pointer( value, renderer->info );

    case PROP_FOLLOW_STATE:
        g_value_set_boolean ( value, renderer->follow_state );

    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID ( object, param_id, psec );
        break;
    }
}


/***************************************************************************
 *
 *  ptk_file_icon_renderer_set_property: as it says
 *
 ***************************************************************************/