[evince/wip/gpoo/use-monitor-for-window-size] shell: Use monitor instead of screen to determine window size

[Germán Poo-Caamaño <gpoo src gnome org>]

commit 40aa4463060064f46ce290a80528baafc20eaf13
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Mon Nov 12 12:23:39 2018 -0300

    shell: Use monitor instead of screen to determine window size
    
    Replace gdk_screen_width/height deprecated API
    
    Fixes #757

 shell/ev-window.c | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)
---
diff --git a/shell/ev-window.c b/shell/ev-window.c
index c107e0ab..fcfd6fd5 100644
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -1280,6 +1280,31 @@ setup_model_from_metadata (EvWindow *window)
        }
 }
 
+static void
+monitor_get_dimesions (EvWindow *ev_window,
+                       gint     *width,
+                       gint     *height)
+{
+       GdkDisplay  *display;
+       GdkWindow   *gdk_window;
+       GdkMonitor  *monitor;
+       GdkRectangle geometry;
+
+       *width = 0;
+       *height = 0;
+
+       display = gtk_widget_get_display (GTK_WIDGET (ev_window));
+       gdk_window = gtk_widget_get_window (GTK_WIDGET (ev_window));
+
+       if (gdk_window) {
+               monitor = gdk_display_get_monitor_at_window (display,
+                                                            gdk_window);
+               gdk_monitor_get_workarea (monitor, &geometry);
+               *width = geometry.width;
+               *height = geometry.height;
+       }
+}
+
 static void
 setup_document_from_metadata (EvWindow *window)
 {
@@ -1320,9 +1345,10 @@ setup_document_from_metadata (EvWindow *window)
        if (width_ratio > 0. && height_ratio > 0.) {
                gdouble    document_width;
                gdouble    document_height;
-               GdkScreen *screen;
                gint       request_width;
                gint       request_height;
+               gint       monitor_width;
+               gint       monitor_height;
 
                ev_document_get_max_page_size (priv->document,
                                               &document_width, &document_height);
@@ -1330,10 +1356,10 @@ setup_document_from_metadata (EvWindow *window)
                request_width = (gint)(width_ratio * document_width + 0.5);
                request_height = (gint)(height_ratio * document_height + 0.5);
 
-               screen = gtk_window_get_screen (GTK_WINDOW (window));
-               if (screen) {
-                       request_width = MIN (request_width, gdk_screen_get_width (screen));
-                       request_height = MIN (request_height, gdk_screen_get_height (screen));
+               monitor_get_dimesions (window, &monitor_width, &monitor_height);
+               if (monitor_width > 0 && monitor_height > 0) {
+                       request_width = MIN (request_width, monitor_width);
+                       request_height = MIN (request_height, monitor_height);
                }
 
                if (request_width > 0 && request_height > 0) {