[evince] Move get_screen_dpi to libdocument

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 8ee88d8e916cb126a0a12e4816b9d1043cbd6472
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Sun Feb 21 12:29:24 2010 +0100

    Move get_screen_dpi to libdocument

 libdocument/ev-document-misc.c |   15 +++++++++++++++
 libdocument/ev-document-misc.h |    2 ++
 shell/ev-utils.c               |   18 ------------------
 shell/ev-utils.h               |    2 --
 shell/ev-window.c              |   22 ++++++++++++++++------
 5 files changed, 33 insertions(+), 26 deletions(-)
---
diff --git a/libdocument/ev-document-misc.c b/libdocument/ev-document-misc.c
index 14bc3a3..0a23394 100644
--- a/libdocument/ev-document-misc.c
+++ b/libdocument/ev-document-misc.c
@@ -21,6 +21,7 @@
 #include <config.h>
 
 #include <string.h>
+#include <math.h>
 
 #include <gtk/gtk.h>
 
@@ -363,3 +364,17 @@ ev_document_misc_invert_pixbuf (GdkPixbuf *pixbuf)
 		}
 	}
 }
+
+gdouble
+ev_document_misc_get_screen_dpi (GdkScreen *screen)
+{
+	gdouble dp, di;
+
+	/*diagonal in pixels*/
+	dp = hypot (gdk_screen_get_width (screen), gdk_screen_get_height (screen));
+
+	/*diagonal in inches*/
+	di = hypot (gdk_screen_get_width_mm(screen), gdk_screen_get_height_mm (screen)) / 25.4;
+
+	return (dp / di);
+}
diff --git a/libdocument/ev-document-misc.h b/libdocument/ev-document-misc.h
index 8e92983..61d070d 100644
--- a/libdocument/ev-document-misc.h
+++ b/libdocument/ev-document-misc.h
@@ -54,6 +54,8 @@ cairo_surface_t *ev_document_misc_surface_rotate_and_scale (cairo_surface_t *sur
 void             ev_document_misc_invert_surface (cairo_surface_t *surface);
 void		 ev_document_misc_invert_pixbuf  (GdkPixbuf       *pixbuf);
 
+gdouble          ev_document_misc_get_screen_dpi (GdkScreen *screen);
+
 G_END_DECLS
 
 #endif /* EV_DOCUMENT_MISC_H */
diff --git a/shell/ev-utils.c b/shell/ev-utils.c
index d77e91f..8c94f6e 100644
--- a/shell/ev-utils.c
+++ b/shell/ev-utils.c
@@ -303,24 +303,6 @@ get_num_monitors (GtkWindow *window)
 	return gdk_screen_get_n_monitors (screen);
 }
 
-gdouble
-get_screen_dpi (GtkWindow *window)
-{
-	GdkScreen *screen;
-	gdouble    dp, di;
-
-	screen = gtk_window_get_screen (window);
-
-	/*diagonal in pixels*/
-	dp = hypot (gdk_screen_get_width (screen), gdk_screen_get_height (screen));
-
-	/*diagonal in inches*/
-	di = hypot (gdk_screen_get_width_mm(screen), gdk_screen_get_height_mm (screen)) / 25.4;
-
-	return (dp / di);
-}
-
-
 void           
 file_chooser_dialog_add_writable_pixbuf_formats (GtkFileChooser *chooser)
 {
diff --git a/shell/ev-utils.h b/shell/ev-utils.h
index f7c58a7..513f51b 100644
--- a/shell/ev-utils.h
+++ b/shell/ev-utils.h
@@ -39,8 +39,6 @@ void 			ev_gui_menu_position_tree_selection (GtkMenu   *menu,
 
 gint 			get_num_monitors (GtkWindow * window);
 
-gdouble 		get_screen_dpi (GtkWindow * window);
-
 void           		file_chooser_dialog_add_writable_pixbuf_formats (GtkFileChooser *chooser);
 GdkPixbufFormat* 	get_gdk_pixbuf_format_by_extension (gchar *uri);
 
diff --git a/shell/ev-window.c b/shell/ev-window.c
index 2725739..93f674b 100644
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -62,6 +62,7 @@
 #include "ev-document-thumbnails.h"
 #include "ev-document-annotations.h"
 #include "ev-document-type-builtins.h"
+#include "ev-document-misc.h"
 #include "ev-file-exporter.h"
 #include "ev-file-helpers.h"
 #include "ev-file-monitor.h"
@@ -321,6 +322,15 @@ static guint ev_window_n_copies = 0;
 
 G_DEFINE_TYPE (EvWindow, ev_window, GTK_TYPE_WINDOW)
 
+static gdouble
+get_screen_dpi (EvWindow *window)
+{
+	GdkScreen *screen;
+
+	screen = gtk_window_get_screen (GTK_WINDOW (window));
+	return ev_document_misc_get_screen_dpi (screen);
+}
+
 static void
 ev_window_set_action_sensitive (EvWindow   *ev_window,
 		    	        const char *name,
@@ -497,7 +507,7 @@ ev_window_update_actions (EvWindow *ev_window)
 						      ZOOM_CONTROL_ACTION);
 
 		real_zoom = ev_document_model_get_scale (ev_window->priv->model);
-		real_zoom *= 72.0 / get_screen_dpi (GTK_WINDOW (ev_window));
+		real_zoom *= 72.0 / get_screen_dpi (ev_window);
 		zoom = ephy_zoom_get_nearest_zoom_level (real_zoom);
 
 		ephy_zoom_action_set_zoom_level (EPHY_ZOOM_ACTION (action), zoom);
@@ -982,7 +992,7 @@ setup_model_from_metadata (EvWindow *window)
 	/* Zoom */
 	if (ev_document_model_get_sizing_mode (window->priv->model) == EV_SIZING_FREE &&
 	    ev_metadata_get_double (window->priv->metadata, "zoom", &zoom)) {
-		zoom *= get_screen_dpi (GTK_WINDOW (window)) / 72.0;
+		zoom *= get_screen_dpi (window) / 72.0;
 		ev_document_model_set_scale (window->priv->model, zoom);
 	}
 
@@ -3711,7 +3721,7 @@ ev_window_screen_changed (GtkWidget *widget,
 		return;
 
 	ev_window_setup_gtk_settings (window);
-	dpi = get_screen_dpi (GTK_WINDOW (window));
+	dpi = get_screen_dpi (window);
 	ev_document_model_set_min_scale (priv->model, MIN_SCALE * dpi / 72.0);
 	ev_document_model_set_max_scale (priv->model, MAX_SCALE * dpi / 72.0);
 
@@ -4067,7 +4077,7 @@ ev_window_zoom_changed_cb (EvDocumentModel *model, GParamSpec *pspec, EvWindow *
 		gdouble zoom;
 
 		zoom = ev_document_model_get_scale (model);
-		zoom *= 72.0 / get_screen_dpi (GTK_WINDOW (ev_window));
+		zoom *= 72.0 / get_screen_dpi (ev_window);
 		ev_metadata_set_double (ev_window->priv->metadata, "zoom", zoom);
 	}
 }
@@ -4685,7 +4695,7 @@ zoom_control_changed_cb (EphyZoomAction *action,
 
 	if (mode == EV_SIZING_FREE) {
 		ev_document_model_set_scale (ev_window->priv->model,
-					     zoom * get_screen_dpi (GTK_WINDOW (ev_window)) / 72.0);
+					     zoom * get_screen_dpi (ev_window) / 72.0);
 	}
 }
 
@@ -6272,7 +6282,7 @@ ev_window_init (EvWindow *ev_window)
 
 	ev_window->priv->view = ev_view_new ();
 	ev_view_set_model (EV_VIEW (ev_window->priv->view), ev_window->priv->model);
-	dpi = get_screen_dpi (GTK_WINDOW (ev_window));
+	dpi = get_screen_dpi (ev_window);
 	ev_document_model_set_min_scale (ev_window->priv->model, MIN_SCALE * dpi / 72.0);
 	ev_document_model_set_max_scale (ev_window->priv->model, MAX_SCALE * dpi / 72.0);
 	ev_window->priv->password_view = ev_password_view_new (GTK_WINDOW (ev_window));