[evince/wip/link-preview: 2/2] libview: Adjust preview size and contents' position

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

commit 2c920c622a660bf622a017dbf675d27348977c95
Author: Henry Gebhardt <hsggebhardt gmail com>
Date:   Sun Dec 2 22:25:18 2018 -0500

    libview: Adjust preview size and contents' position
    
    Makes the preview as wide as possible, and tries to put the link
    slightly above the center of the preview.
    
    Fixes #662

 libview/ev-view.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)
---
diff --git a/libview/ev-view.c b/libview/ev-view.c
index d03a1e7c..d57b2a61 100644
--- a/libview/ev-view.c
+++ b/libview/ev-view.c
@@ -4936,15 +4936,21 @@ static void
 link_preview_show_thumbnail (GdkPixbuf *pixbuf, EvView *view)
 {
        GtkWidget *popover = view->link_preview.popover;
-       gdouble         left = view->link_preview.left;
-       gdouble         top = view->link_preview.top;
-       int             width = MIN(gdk_pixbuf_get_width (pixbuf) - left, gtk_widget_get_allocated_width 
(GTK_WIDGET (view)));
-       int             height = MIN (gdk_pixbuf_get_height (pixbuf) - top, 365);
-       GdkPixbuf       *thumbnail_slice;
+       GdkPixbuf *thumbnail_slice;
        GtkWidget *image_view;
+       gdouble    x = view->link_preview.left;
+       gdouble    y = view->link_preview.top;
+       gint       pwidth = gdk_pixbuf_get_width (pixbuf);
+       gint       pheight = gdk_pixbuf_get_height (pixbuf);
+       gint       vwidth = gtk_widget_get_allocated_width (GTK_WIDGET (view));
+       gint       vheight = gtk_widget_get_allocated_height (GTK_WIDGET (view));
+       gint       width = MIN (pwidth, vwidth);
+       gint       height = MIN (pheight, (int)(vheight / 3.0));
+       gint       left = MIN (MAX (0, (int)(x - width * 0.5)), pwidth - width);
+       gint       top = MIN (MAX (0, (int)(y - height * 0.3)), pheight - height);
 
        thumbnail_slice = gdk_pixbuf_new_subpixbuf (pixbuf,
-                                                   (int)left, (int)top,
+                                                   left, top,
                                                    width, height);
        image_view = gtk_image_new_from_pixbuf (thumbnail_slice);