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desktop-canvas-view: scale desktop workarea

The problem is that in the function canvas_container_set_workarea the screen width
and height are in "application pixels" while the workarea ones are in "device
pixels" so when the scaling is > 1, the margins are not properly setted.

We need to scale-down the workarea geometries to "application pixels".

https://bugzilla.gnome.org/show_bug.cgi?id=769302

origin commit:
https://gitlab.gnome.org/GNOME/nautilus/commit/315a55df
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azzar1 authored and lukefromdc committed Jul 30, 2016
1 parent 37ebfa8 commit 35eb4160b389bce690202122f4c5d802e226a0d4
Showing with 8 additions and 4 deletions.
  1. +8 −4 src/file-manager/fm-desktop-icon-view.c
@@ -115,19 +115,23 @@ icon_container_set_workarea (CajaIconContainer *icon_container,
{
int left, right, top, bottom;
int screen_width, screen_height;
int scale;
int i;

left = right = top = bottom = 0;

screen_width = WidthOfScreen (gdk_x11_screen_get_xscreen (screen));
screen_height = HeightOfScreen (gdk_x11_screen_get_xscreen (screen));

scale = gdk_window_get_scale_factor (gdk_screen_get_root_window (screen));
scale = scale ? scale : 1;

for (i = 0; i < n_items; i += 4)
{
int x = workareas [i];
int y = workareas [i + 1];
int width = workareas [i + 2];
int height = workareas [i + 3];
int x = workareas [i] / scale;
int y = workareas [i + 1] / scale;
int width = workareas [i + 2] / scale;
int height = workareas [i + 3] / scale;

if ((x + width) > screen_width || (y + height) > screen_height)
continue;

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