[evince/30-null-page-in-thumbnail-display-desirable] sidebar-thumbnails: Remove TreeView implementation

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

commit bb8beaff24e0ef6970883d70311bb938f302e770
Author: Germán Poo-Caamaño <gpoo gnome org>
Date:   Mon Jan 7 16:33:53 2019 -0300

    sidebar-thumbnails: Remove TreeView implementation
    
    Since commit 6480c703, there should not be performance
    issues that make the treeview workaround to be in the code
    anymore. Not at least one we can perceive.
    
    Additionally, the GtkTreeView implementation of thumbnails
    is subpar with the GtkIconView.

 shell/ev-sidebar-thumbnails.c | 144 ++++++------------------------------------
 1 file changed, 19 insertions(+), 125 deletions(-)
---
diff --git a/shell/ev-sidebar-thumbnails.c b/shell/ev-sidebar-thumbnails.c
index 7aa20077..8311eca4 100644
--- a/shell/ev-sidebar-thumbnails.c
+++ b/shell/ev-sidebar-thumbnails.c
@@ -42,10 +42,6 @@
 
 #define THUMBNAIL_WIDTH 100
 
-/* The IconView doesn't scale nearly as well as the TreeView, so we arbitrarily
- * limit its use */
-#define MAX_ICON_VIEW_PAGE_COUNT 1500
-
 typedef struct _EvThumbsSize
 {
        gint width;
@@ -62,7 +58,6 @@ typedef struct _EvThumbsSizeCache {
 struct _EvSidebarThumbnailsPrivate {
        GtkWidget *swindow;
        GtkWidget *icon_view;
-       GtkWidget *tree_view;
        GtkAdjustment *vadjustment;
        GtkListStore *list_store;
        GHashTable *loading_icons;
@@ -231,37 +226,21 @@ ev_sidebar_thumbnails_page_is_in_visible_range (EvSidebarThumbnails *sidebar,
         GtkTreePath *path;
         GtkTreePath *start, *end;
         gboolean     retval;
+        GList *selection;
 
-        if (sidebar->priv->tree_view) {
-                GtkTreeSelection *selection;
-                GtkTreeIter       iter;
-
-                selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (sidebar->priv->tree_view));
-                if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
-                        return FALSE;
-
-                path = gtk_tree_model_get_path (GTK_TREE_MODEL (sidebar->priv->list_store), &iter);
-                if (!gtk_tree_view_get_visible_range (GTK_TREE_VIEW (sidebar->priv->tree_view), &start, 
&end)) {
-                        gtk_tree_path_free (path);
-                        return FALSE;
-                }
-        } else {
-                GList *selection;
-
-                selection = gtk_icon_view_get_selected_items (GTK_ICON_VIEW (sidebar->priv->icon_view));
-                if (!selection)
-                        return FALSE;
+        selection = gtk_icon_view_get_selected_items (GTK_ICON_VIEW (sidebar->priv->icon_view));
+        if (!selection)
+                return FALSE;
 
-                path = (GtkTreePath *)selection->data;
+        path = (GtkTreePath *)selection->data;
 
-                /* We don't handle or expect multiple selection. */
-                g_assert (selection->next == NULL);
-                g_list_free (selection);
+        /* We don't handle or expect multiple selection. */
+        g_assert (selection->next == NULL);
+        g_list_free (selection);
 
-                if (!gtk_icon_view_get_visible_range (GTK_ICON_VIEW (sidebar->priv->icon_view), &start, 
&end)) {
-                        gtk_tree_path_free (path);
-                        return FALSE;
-                }
+        if (!gtk_icon_view_get_visible_range (GTK_ICON_VIEW (sidebar->priv->icon_view), &start, &end)) {
+                gtk_tree_path_free (path);
+                return FALSE;
         }
 
         retval = gtk_tree_path_compare (path, start) >= 0 && gtk_tree_path_compare (path, end) <= 0;
@@ -301,10 +280,7 @@ ev_sidebar_thumbnails_get_property (GObject    *object,
 
        switch (prop_id) {
        case PROP_WIDGET:
-               if (sidebar->priv->tree_view)
-                       g_value_set_object (value, sidebar->priv->tree_view);
-               else
-                       g_value_set_object (value, sidebar->priv->icon_view);
+               g_value_set_object (value, sidebar->priv->icon_view);
                break;
        default:
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -620,23 +596,7 @@ adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 
        value = gtk_adjustment_get_value (priv->vadjustment);
        
-       if (priv->tree_view) {
-               if (! gtk_widget_get_realized (priv->tree_view))
-                       return;
-
-               gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
-                                                                0, (int) value,
-                                                                NULL, &wy1);
-               gtk_tree_view_convert_tree_to_bin_window_coords (GTK_TREE_VIEW (priv->tree_view),
-                                                                0, (int) (value + page_size),
-                                                                NULL, &wy2);
-               gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
-                                              1, wy1 + 1, &path,
-                                              NULL, NULL, NULL);
-               gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
-                                              1, wy2 -1, &path2,
-                                              NULL, NULL, NULL);
-       } else if (priv->icon_view) {
+       if (priv->icon_view) {
                if (! gtk_widget_get_realized (priv->icon_view))
                        return;
                if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
@@ -751,35 +711,6 @@ ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
        ev_document_model_set_page (priv->model, page);
 }
 
-static void
-ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
-{
-       EvSidebarThumbnailsPrivate *priv;
-       GtkTreeSelection *selection;
-       GtkCellRenderer *renderer;
-
-       priv = ev_sidebar_thumbnails->priv;
-       priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
-
-       selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
-       g_signal_connect (selection, "changed",
-                         G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
-       gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
-       renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
-                                "xpad", 2,
-                                "ypad", 2,
-                                NULL);
-       gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
-                                                    NULL, renderer,
-                                                    "surface", 1,
-                                                    NULL);
-       gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
-                                                    NULL, gtk_cell_renderer_text_new (),
-                                                    "markup", 0, NULL);
-       gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
-       gtk_widget_show (priv->tree_view);
-}
-
 static void
 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 {
@@ -828,14 +759,6 @@ ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
        gtk_widget_show (priv->icon_view);
 }
 
-static gboolean
-ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
-{
-       EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
-
-       return (ev_document_get_n_pages (priv->document) <= MAX_ICON_VIEW_PAGE_COUNT);
-}
-
 static void
 ev_sidebar_thumbnails_device_scale_factor_changed_cb (EvSidebarThumbnails *sidebar_thumbnails,
                                                       GParamSpec          *pspec)
@@ -905,7 +828,6 @@ static void
 ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
                                        gint                 page)
 {
-       GtkTreeView *tree_view;
        GtkTreePath *path;
 
        if (sidebar->priv->blank_first_dual_mode)
@@ -913,11 +835,7 @@ ev_sidebar_thumbnails_set_current_page (EvSidebarThumbnails *sidebar,
 
        path = gtk_tree_path_new_from_indices (page, -1);
 
-       if (sidebar->priv->tree_view) {
-               tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
-               gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
-               gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
-       } else if (sidebar->priv->icon_view) {
+       if (sidebar->priv->icon_view) {
 
                g_signal_handlers_block_by_func
                        (sidebar->priv->icon_view,
@@ -1032,10 +950,7 @@ thumbnail_job_completed_callback (EvJobThumbnail      *job,
                            -1);
         cairo_surface_destroy (surface);
 
-       if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails))
-               gtk_widget_queue_draw (priv->icon_view);
-       else
-               gtk_widget_queue_draw (priv->tree_view);
+       gtk_widget_queue_draw (priv->icon_view);
 }
 
 static void
@@ -1068,29 +983,11 @@ ev_sidebar_thumbnails_document_changed_cb (EvDocumentModel     *model,
        ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
        ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 
-       /* Create the view widget, and remove the old one, if needed */
-       if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
-               if (priv->tree_view) {
-                       gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
-                       priv->tree_view = NULL;
-               }
-
-               if (! priv->icon_view) {
-                       ev_sidebar_init_icon_view (sidebar_thumbnails);
-                       g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
-               } else {
-                       gtk_widget_queue_resize (priv->icon_view);
-               }
+       if (! priv->icon_view) {
+               ev_sidebar_init_icon_view (sidebar_thumbnails);
+               g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
        } else {
-               if (priv->icon_view) {
-                       gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
-                       priv->icon_view = NULL;
-               }
-
-               if (! priv->tree_view) {
-                       ev_sidebar_init_tree_view (sidebar_thumbnails);
-                       g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
-               }
+               gtk_widget_queue_resize (priv->icon_view);
        }
 
        /* Connect to the signal and trigger a fake callback */
@@ -1236,9 +1133,6 @@ ev_sidebar_thumbnails_is_two_columns (EvSidebarThumbnails *sidebar)
         gint margin, column_spacing, item_padding, thumbnail_width;
         static gint frame_horizontal_width;
 
-        if (!ev_sidebar_thumbnails_use_icon_view (sidebar))
-                return FALSE;
-
         priv = sidebar->priv;
         icon_view = GTK_ICON_VIEW (priv->icon_view);