[nautilus] files-view: disable the reset zoom button by default

[Ernestas Kulik <ernestask src gnome org>]

commit b295aa54469d3fe8fa79c8e07041f20dfe324140
Author: Diana Grecu <dianagrecu07 gmail com>
Date:   Sat May 13 12:16:11 2017 +0300

    files-view: disable the reset zoom button by default
    
    The reset zoom button is sensitive even though the zoom percentage is already at
    100%.
    
    Let the button be inactive if the zoom percentage is already at 100%.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771481

 src/nautilus-canvas-view.c          |   13 +++++++++++++
 src/nautilus-files-view.c           |   12 +++++++++++-
 src/nautilus-files-view.h           |    2 ++
 src/nautilus-list-view.c            |   13 +++++++++++++
 src/nautilus-view-icon-controller.c |   13 +++++++++++++
 5 files changed, 52 insertions(+), 1 deletions(-)
---
diff --git a/src/nautilus-canvas-view.c b/src/nautilus-canvas-view.c
index 6bc726a..5b2683b 100644
--- a/src/nautilus-canvas-view.c
+++ b/src/nautilus-canvas-view.c
@@ -950,6 +950,18 @@ nautilus_canvas_view_get_zoom_level_percentage (NautilusFilesView *view)
 }
 
 static gboolean
+nautilus_canvas_view_is_zoom_level_default (NautilusFilesView *view)
+{
+    guint icon_size;
+    NautilusCanvasZoomLevel zoom_level;
+
+    zoom_level = nautilus_canvas_view_get_zoom_level (view);
+    icon_size = nautilus_canvas_container_get_icon_size_for_zoom_level (zoom_level);
+
+    return icon_size == NAUTILUS_CANVAS_ICON_SIZE_LARGE;
+}
+
+static gboolean
 nautilus_canvas_view_is_empty (NautilusFilesView *view)
 {
     g_assert (NAUTILUS_IS_CANVAS_VIEW (view));
@@ -2015,6 +2027,7 @@ nautilus_canvas_view_class_init (NautilusCanvasViewClass *klass)
     nautilus_files_view_class->can_zoom_in = nautilus_canvas_view_can_zoom_in;
     nautilus_files_view_class->can_zoom_out = nautilus_canvas_view_can_zoom_out;
     nautilus_files_view_class->get_zoom_level_percentage = nautilus_canvas_view_get_zoom_level_percentage;
+    nautilus_files_view_class->is_zoom_level_default = nautilus_canvas_view_is_zoom_level_default;
     nautilus_files_view_class->clear = nautilus_canvas_view_clear;
     nautilus_files_view_class->end_loading = nautilus_canvas_view_end_loading;
     nautilus_files_view_class->file_changed = nautilus_canvas_view_file_changed;
diff --git a/src/nautilus-files-view.c b/src/nautilus-files-view.c
index 89edede..3d56913 100644
--- a/src/nautilus-files-view.c
+++ b/src/nautilus-files-view.c
@@ -854,6 +854,14 @@ nautilus_files_view_get_zoom_level_percentage (NautilusFilesView *view)
     return NAUTILUS_FILES_VIEW_CLASS (G_OBJECT_GET_CLASS (view))->get_zoom_level_percentage (view);
 }
 
+static gboolean
+nautilus_files_view_is_zoom_level_default (NautilusFilesView *view)
+{
+    g_return_val_if_fail (NAUTILUS_IS_FILES_VIEW (view), FALSE);
+
+    return NAUTILUS_FILES_VIEW_CLASS (G_OBJECT_GET_CLASS (view))->is_zoom_level_default (view);
+}
+
 gboolean
 nautilus_files_view_is_searching (NautilusView *view)
 {
@@ -7364,6 +7372,7 @@ real_update_actions_state (NautilusFilesView *view)
     GList *selection, *l;
     NautilusFile *file;
     gint selection_count;
+    gboolean zoom_level_is_default;
     gboolean selection_contains_special_link;
     gboolean selection_contains_desktop_or_home_dir;
     gboolean selection_contains_recent;
@@ -7407,6 +7416,7 @@ real_update_actions_state (NautilusFilesView *view)
                              (!nautilus_file_can_write (NAUTILUS_FILE (selection->data)) &&
                               !nautilus_file_has_activation_uri (NAUTILUS_FILE (selection->data)));
     selection_all_in_trash = all_in_trash (selection);
+    zoom_level_is_default = nautilus_files_view_is_zoom_level_default (view);
 
     is_read_only = nautilus_files_view_is_read_only (view);
     can_create_files = nautilus_files_view_supports_creating_files (view);
@@ -7725,7 +7735,7 @@ real_update_actions_state (NautilusFilesView *view)
     action = g_action_map_lookup_action (G_ACTION_MAP (view_action_group),
                                          "zoom-standard");
     g_simple_action_set_enabled (G_SIMPLE_ACTION (action),
-                                 nautilus_files_view_supports_zooming (view));
+                                 nautilus_files_view_supports_zooming (view) && !zoom_level_is_default);
     action = g_action_map_lookup_action (G_ACTION_MAP (view_action_group),
                                          "zoom-to-level");
     g_simple_action_set_enabled (G_SIMPLE_ACTION (action),
diff --git a/src/nautilus-files-view.h b/src/nautilus-files-view.h
index aff0133..b38bb33 100644
--- a/src/nautilus-files-view.h
+++ b/src/nautilus-files-view.h
@@ -170,6 +170,8 @@ struct _NautilusFilesViewClass {
         /* The current zoom level as a percentage of the default (0, 1] */
         gfloat   (* get_zoom_level_percentage) (NautilusFilesView *view);
 
+        gboolean (*is_zoom_level_default)      (NautilusFilesView *view);
+
         /* reveal_selection is a function pointer that subclasses may
          * override to make sure the selected items are sufficiently
          * apparent to the user (e.g., scrolled into view). By default,
diff --git a/src/nautilus-list-view.c b/src/nautilus-list-view.c
index 14a074a..36c0c08 100644
--- a/src/nautilus-list-view.c
+++ b/src/nautilus-list-view.c
@@ -3170,6 +3170,18 @@ nautilus_list_view_get_zoom_level_percentage (NautilusFilesView *view)
     return (gfloat) icon_size / NAUTILUS_LIST_ICON_SIZE_STANDARD;
 }
 
+static gboolean
+nautilus_list_view_is_zoom_level_default (NautilusFilesView *view)
+{
+    NautilusListView *list_view;
+    guint icon_size;
+
+    list_view = NAUTILUS_LIST_VIEW (view);
+    icon_size = nautilus_list_model_get_icon_size_for_zoom_level (list_view->details->zoom_level);
+
+    return icon_size == NAUTILUS_LIST_ICON_SIZE_STANDARD;
+}
+
 static void
 nautilus_list_view_click_policy_changed (NautilusFilesView *directory_view)
 {
@@ -3560,6 +3572,7 @@ nautilus_list_view_class_init (NautilusListViewClass *class)
     nautilus_files_view_class->can_zoom_in = nautilus_list_view_can_zoom_in;
     nautilus_files_view_class->can_zoom_out = nautilus_list_view_can_zoom_out;
     nautilus_files_view_class->get_zoom_level_percentage = nautilus_list_view_get_zoom_level_percentage;
+    nautilus_files_view_class->is_zoom_level_default = nautilus_list_view_is_zoom_level_default;
     nautilus_files_view_class->click_policy_changed = nautilus_list_view_click_policy_changed;
     nautilus_files_view_class->clear = nautilus_list_view_clear;
     nautilus_files_view_class->file_changed = nautilus_list_view_file_changed;
diff --git a/src/nautilus-view-icon-controller.c b/src/nautilus-view-icon-controller.c
index e7308a2..f6199ba 100644
--- a/src/nautilus-view-icon-controller.c
+++ b/src/nautilus-view-icon-controller.c
@@ -570,6 +570,18 @@ real_get_zoom_level_percentage (NautilusFilesView *files_view)
 }
 
 static gboolean
+real_is_zoom_level_default (NautilusFilesView *files_view)
+{
+    NautilusViewIconController *self;
+    guint icon_size;
+
+    self = NAUTILUS_VIEW_ICON_CONTROLLER (files_view);
+    icon_size = get_icon_size_for_zoom_level (self->zoom_level);
+
+    return icon_size == NAUTILUS_CANVAS_ICON_SIZE_LARGE;
+}
+
+static gboolean
 real_can_zoom_in (NautilusFilesView *files_view)
 {
     return TRUE;
@@ -909,6 +921,7 @@ nautilus_view_icon_controller_class_init (NautilusViewIconControllerClass *klass
     files_view_class->select_first = real_select_first;
     files_view_class->restore_standard_zoom_level = real_restore_standard_zoom_level;
     files_view_class->get_zoom_level_percentage = real_get_zoom_level_percentage;
+    files_view_class->is_zoom_level_default = real_is_zoom_level_default;
     files_view_class->compute_rename_popover_pointing_to = real_compute_rename_popover_pointing_to;
 }