[gimp] app: behave as if "show all" is disabled in scroll/zoom actions when keeping padding

[Ell <ell src gnome org>]

commit 2d6e80b8ed060bbfe524ef9fce3bd153dd0403fa
Author: Ell <ell_se yahoo com>
Date:   Sun Sep 15 16:22:06 2019 +0300

    app: behave as if "show all" is disabled in scroll/zoom actions when keeping padding

 app/display/gimpdisplayshell-appearance.c |  9 +++++-
 app/display/gimpdisplayshell-callbacks.c  |  2 +-
 app/display/gimpdisplayshell-handlers.c   |  2 +-
 app/display/gimpdisplayshell-scale.c      | 51 ++++++++++++++++++++++++++++---
 app/display/gimpdisplayshell-scale.h      |  6 ++++
 app/display/gimpdisplayshell-scroll.c     | 21 ++++++++++---
 app/display/gimpdisplayshell-scrollbars.c | 30 ++++++++++++++----
 app/display/gimpdisplayshell.c            |  9 ++++++
 app/display/gimpdisplayshell.h            |  2 ++
 app/display/gimpimagewindow.c             | 14 +++++++--
 10 files changed, 125 insertions(+), 21 deletions(-)
---
diff --git a/app/display/gimpdisplayshell-appearance.c b/app/display/gimpdisplayshell-appearance.c
index 80aedc9b8b..6952f7bfe4 100644
--- a/app/display/gimpdisplayshell-appearance.c
+++ b/app/display/gimpdisplayshell-appearance.c
@@ -38,6 +38,8 @@
 #include "gimpdisplayshell-appearance.h"
 #include "gimpdisplayshell-expose.h"
 #include "gimpdisplayshell-selection.h"
+#include "gimpdisplayshell-scroll.h"
+#include "gimpdisplayshell-scrollbars.h"
 #include "gimpimagewindow.h"
 #include "gimpstatusbar.h"
 
@@ -541,7 +543,12 @@ gimp_display_shell_set_padding_in_show_all (GimpDisplayShell *shell,
       g_object_set (options, "padding-in-show-all", keep, NULL);
 
       if (shell->display)
-        gimp_display_shell_expose_full (shell);
+        {
+          gimp_display_shell_scroll_clamp_and_update (shell);
+          gimp_display_shell_scrollbars_update (shell);
+
+          gimp_display_shell_expose_full (shell);
+        }
 
       gimp_display_shell_set_action_active (shell,
                                             "view-padding-color-in-show-all",
diff --git a/app/display/gimpdisplayshell-callbacks.c b/app/display/gimpdisplayshell-callbacks.c
index aed9e92e91..2891bf4e8a 100644
--- a/app/display/gimpdisplayshell-callbacks.c
+++ b/app/display/gimpdisplayshell-callbacks.c
@@ -190,7 +190,7 @@ gimp_display_shell_canvas_tick (GtkWidget     *widget,
           center_horizontally = sw <= shell->disp_width;
           center_vertically   = sh <= shell->disp_height;
 
-          if (! shell->show_all)
+          if (! gimp_display_shell_get_infinite_canvas (shell))
             {
               gimp_display_shell_scroll_center_image (shell,
                                                       center_horizontally,
diff --git a/app/display/gimpdisplayshell-handlers.c b/app/display/gimpdisplayshell-handlers.c
index 5ce0184a5f..2d7e65e89b 100644
--- a/app/display/gimpdisplayshell-handlers.c
+++ b/app/display/gimpdisplayshell-handlers.c
@@ -885,7 +885,7 @@ gimp_display_shell_size_changed_detailed_handler (GimpImage        *image,
                                             shell->offset_x + scaled_previous_origin_x,
                                             shell->offset_y + scaled_previous_origin_y);
 
-      if (! shell->show_all)
+      if (! gimp_display_shell_get_infinite_canvas (shell))
         {
           gimp_display_shell_scroll_center_image (shell,
                                                   horizontally, vertically);
diff --git a/app/display/gimpdisplayshell-scale.c b/app/display/gimpdisplayshell-scale.c
index a44b6d9fc7..8e61eb47ae 100644
--- a/app/display/gimpdisplayshell-scale.c
+++ b/app/display/gimpdisplayshell-scale.c
@@ -275,6 +275,36 @@ gimp_display_shell_scale_get_image_bounds (GimpDisplayShell *shell,
   if (h) *h = y2 - y1;
 }
 
+/**
+ * gimp_display_shell_scale_get_image_unrotated_bounds:
+ * @shell:
+ * @x:
+ * @y:
+ * @w:
+ * @h:
+ *
+ * Gets the screen-space boudning box of the image, after it has
+ * been scaled and scrolled, but before it has been rotated.
+ **/
+void
+gimp_display_shell_scale_get_image_unrotated_bounds (GimpDisplayShell *shell,
+                                                     gint             *x,
+                                                     gint             *y,
+                                                     gint             *w,
+                                                     gint             *h)
+{
+  GimpImage *image;
+
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+
+  image = gimp_display_get_image (shell->display);
+
+  if (x) *x = -shell->offset_x;
+  if (y) *y = -shell->offset_y;
+  if (w) *w = floor (gimp_image_get_width  (image) * shell->scale_x);
+  if (h) *h = floor (gimp_image_get_height (image) * shell->scale_y);
+}
+
 /**
  * gimp_display_shell_scale_get_image_bounding_box:
  * @shell:
@@ -406,7 +436,7 @@ gimp_display_shell_scale_image_is_within_viewport (GimpDisplayShell *shell,
   if (! horizontally) horizontally = &horizontally_dummy;
   if (! vertically)   vertically   = &vertically_dummy;
 
-  if (! shell->show_all)
+  if (! gimp_display_shell_get_infinite_canvas (shell))
     {
       gint sx, sy;
       gint sw, sh;
@@ -1130,7 +1160,19 @@ gimp_display_shell_scale_fit_or_fill (GimpDisplayShell *shell,
   gdouble       current_scale;
   gdouble       zoom_factor;
 
-  bounding_box = gimp_display_shell_get_bounding_box (shell);
+  if (! gimp_display_shell_get_infinite_canvas (shell))
+    {
+      GimpImage *image = gimp_display_get_image (shell->display);
+
+      bounding_box.x      = 0;
+      bounding_box.y      = 0;
+      bounding_box.width  = gimp_image_get_width  (image);
+      bounding_box.height = gimp_image_get_height (image);
+    }
+  else
+    {
+      bounding_box = gimp_display_shell_get_bounding_box (shell);
+    }
 
   gimp_display_shell_transform_bounds (shell,
                                        bounding_box.x,
@@ -1180,7 +1222,8 @@ gimp_display_shell_scale_image_starts_to_fit (GimpDisplayShell *shell,
   if (! horizontally) horizontally = &horizontally_dummy;
 
   /* The image can only start to fit if we zoom out */
-  if (new_scale > current_scale || shell->show_all)
+  if (new_scale > current_scale ||
+      gimp_display_shell_get_infinite_canvas (shell))
     {
       *vertically   = FALSE;
       *horizontally = FALSE;
@@ -1246,7 +1289,7 @@ gimp_display_shell_scale_viewport_coord_almost_centered (GimpDisplayShell *shell
   gint     center_x           = shell->disp_width  / 2;
   gint     center_y           = shell->disp_height / 2;
 
-  if (! shell->show_all)
+  if (! gimp_display_shell_get_infinite_canvas (shell))
     {
       local_horizontally = (x > center_x - ALMOST_CENTERED_THRESHOLD &&
                             x < center_x + ALMOST_CENTERED_THRESHOLD);
diff --git a/app/display/gimpdisplayshell-scale.h b/app/display/gimpdisplayshell-scale.h
index 7f38eb0264..b97f9fb509 100644
--- a/app/display/gimpdisplayshell-scale.h
+++ b/app/display/gimpdisplayshell-scale.h
@@ -34,6 +34,12 @@ void     gimp_display_shell_scale_get_image_bounds   (GimpDisplayShell *shell,
                                                       gint             *y,
                                                       gint             *w,
                                                       gint             *h);
+void     gimp_display_shell_scale_get_image_unrotated_bounds
+                                                     (GimpDisplayShell *shell,
+                                                      gint             *x,
+                                                      gint             *y,
+                                                      gint             *w,
+                                                      gint             *h);
 void     gimp_display_shell_scale_get_image_bounding_box
                                                      (GimpDisplayShell *shell,
                                                       gint             *x,
diff --git a/app/display/gimpdisplayshell-scroll.c b/app/display/gimpdisplayshell-scroll.c
index 453574b2f7..0c340d74a3 100644
--- a/app/display/gimpdisplayshell-scroll.c
+++ b/app/display/gimpdisplayshell-scroll.c
@@ -480,11 +480,22 @@ gimp_display_shell_scroll_center_content (GimpDisplayShell *shell,
       (! vertically && ! horizontally))
     return;
 
-  gimp_display_shell_scale_get_image_bounding_box (shell,
-                                                   &content_x,
-                                                   &content_y,
-                                                   &content_width,
-                                                   &content_height);
+  if (! gimp_display_shell_get_infinite_canvas (shell))
+    {
+      gimp_display_shell_scale_get_image_bounds (shell,
+                                                 &content_x,
+                                                 &content_y,
+                                                 &content_width,
+                                                 &content_height);
+    }
+  else
+    {
+      gimp_display_shell_scale_get_image_bounding_box (shell,
+                                                       &content_x,
+                                                       &content_y,
+                                                       &content_width,
+                                                       &content_height);
+    }
 
   if (shell->disp_width > content_width)
     {
diff --git a/app/display/gimpdisplayshell-scrollbars.c b/app/display/gimpdisplayshell-scrollbars.c
index 58d964eb8a..3696e01843 100644
--- a/app/display/gimpdisplayshell-scrollbars.c
+++ b/app/display/gimpdisplayshell-scrollbars.c
@@ -110,9 +110,18 @@ gimp_display_shell_scrollbars_setup_horizontal (GimpDisplayShell *shell,
                                              &bounds_x,     NULL,
                                              &bounds_width, NULL);
 
-  gimp_display_shell_scale_get_image_bounding_box (shell,
-                                                   &bounding_box_x,     NULL,
-                                                   &bounding_box_width, NULL);
+  if (! gimp_display_shell_get_infinite_canvas (shell))
+    {
+      bounding_box_x     = bounds_x;
+      bounding_box_width = bounds_width;
+    }
+  else
+    {
+      gimp_display_shell_scale_get_image_bounding_box (
+        shell,
+        &bounding_box_x,     NULL,
+        &bounding_box_width, NULL);
+    }
 
   x1 = bounding_box_x;
   x2 = bounding_box_x + bounding_box_width;
@@ -162,9 +171,18 @@ gimp_display_shell_scrollbars_setup_vertical (GimpDisplayShell *shell,
                                              NULL, &bounds_y,
                                              NULL, &bounds_height);
 
-  gimp_display_shell_scale_get_image_bounding_box (shell,
-                                                   NULL, &bounding_box_y,
-                                                   NULL, &bounding_box_height);
+  if (! gimp_display_shell_get_infinite_canvas (shell))
+    {
+      bounding_box_y      = bounds_y;
+      bounding_box_height = bounds_height;
+    }
+  else
+    {
+      gimp_display_shell_scale_get_image_bounding_box (
+        shell,
+        NULL, &bounding_box_y,
+        NULL, &bounding_box_height);
+    }
 
   y1 = bounding_box_y;
   y2 = bounding_box_y + bounding_box_height;
diff --git a/app/display/gimpdisplayshell.c b/app/display/gimpdisplayshell.c
index 779d1bda91..7128562b04 100644
--- a/app/display/gimpdisplayshell.c
+++ b/app/display/gimpdisplayshell.c
@@ -1846,6 +1846,15 @@ gimp_display_shell_get_bounding_box (GimpDisplayShell *shell)
   return bounding_box;
 }
 
+gboolean
+gimp_display_shell_get_infinite_canvas (GimpDisplayShell *shell)
+{
+  g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), FALSE);
+
+  return shell->show_all &&
+         ! gimp_display_shell_get_padding_in_show_all (shell);
+}
+
 void
 gimp_display_shell_update_priority_rect (GimpDisplayShell *shell)
 {
diff --git a/app/display/gimpdisplayshell.h b/app/display/gimpdisplayshell.h
index 52df072758..ff3a7d3048 100644
--- a/app/display/gimpdisplayshell.h
+++ b/app/display/gimpdisplayshell.h
@@ -319,6 +319,8 @@ void              gimp_display_shell_set_show_all  (GimpDisplayShell   *shell,
 GimpPickable    * gimp_display_shell_get_pickable  (GimpDisplayShell   *shell);
 GeglRectangle     gimp_display_shell_get_bounding_box
                                                    (GimpDisplayShell   *shell);
+gboolean          gimp_display_shell_get_infinite_canvas
+                                                   (GimpDisplayShell   *shell);
 
 void              gimp_display_shell_update_priority_rect
                                                    (GimpDisplayShell *shell);
diff --git a/app/display/gimpimagewindow.c b/app/display/gimpimagewindow.c
index f8d206264c..c0df5b276f 100644
--- a/app/display/gimpimagewindow.c
+++ b/app/display/gimpimagewindow.c
@@ -1472,9 +1472,17 @@ gimp_image_window_shrink_wrap (GimpImageWindow *window,
 
   gdk_monitor_get_workarea (monitor, &rect);
 
-  gimp_display_shell_scale_get_image_bounding_box (active_shell,
-                                                   NULL,   NULL,
-                                                   &width, &height);
+  if (! gimp_display_shell_get_infinite_canvas (active_shell))
+    {
+      gimp_display_shell_scale_get_image_size (active_shell,
+                                               &width, &height);
+    }
+  else
+    {
+      gimp_display_shell_scale_get_image_bounding_box (active_shell,
+                                                       NULL,   NULL,
+                                                       &width, &height);
+    }
 
   disp_width  = active_shell->disp_width;
   disp_height = active_shell->disp_height;