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gtk2/gtk/gtkfilesystemmodel.c

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/* GTK - The GIMP Toolkit
* gtkfilesystemmodel.c: GtkTreeModel wrapping a GtkFileSystem
* Copyright (C) 2003, Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkfilesystemmodel.h"
#include <stdlib.h>
#include <string.h>
#include "gtkfilesystem.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtktreedatalist.h"
#include "gtktreednd.h"
#include "gtktreemodel.h"
/*** Structure: how GtkFileSystemModel works
*
* This is a custom GtkTreeModel used to hold a collection of files for GtkFileChooser. There are two use cases:
*
* 1. The model populates itself from a folder, using the GIO file enumerator API. This happens if you use
* _gtk_file_system_model_new_for_directory(). This is the normal usage for showing the contents of a folder.
*
* 2. The caller populates the model by hand, with files not necessarily in the same folder. This happens
* if you use _gtk_file_system_model_new() and then _gtk_file_system_model_add_and_query_file(). This is
* the special kind of usage for “search” and “recent-files”, where the file chooser gives the model the
* files to be displayed.
*
* Internal data structure
* -----------------------
*
* Each file is kept in a FileModelNode structure. Each FileModelNode holds a GFile* and other data. All the
* node structures have the same size, determined at runtime, depending on the number of columns that were passed
* to _gtk_file_system_model_new() or _gtk_file_system_model_new_for_directory() (that is, the size of a node is
* not sizeof (FileModelNode), but rather model->node_size). The last field in the FileModelNode structure,
* node->values[], is an array of GValue, used to hold the data for those columns.
*
* The model stores an array of FileModelNode structures in model->files. This is a GArray where each element is
* model->node_size bytes in size (the model computes that node size when initializing itself). There are
* convenience macros, get_node() and node_index(), to access that array based on an array index or a pointer to
* a node inside the array.
*
* The model accesses files through two of its fields:
*
* model->files - GArray of FileModelNode structures.
*
* model->file_lookup - hash table that maps a GFile* to an index inside the model->files array.
*
* The model->file_lookup hash table is populated lazily. It is both accessed and populated with the
* node_get_for_file() function. The invariant is that the files in model->files[n] for n < g_hash_table_size
* (model->file_lookup) are already added to the hash table. The hash table will get cleared when we re-sort the
* files, as the array will be in a different order and the indexes need to be rebuilt.
*
* Each FileModelNode has a node->visible field, which indicates whether the node is visible in the GtkTreeView.
* A node may be invisible if, for example, it corresponds to a hidden file and the file chooser is not showing
* hidden files. Also, a file filter may be explicitly set onto the model, for example, to only show files that
* match “*.jpg”. In this case, node->filtered_out says whether the node failed the filter. The ultimate
* decision on whether a node is visible or not in the treeview is distilled into the node->visible field.
* The reason for having a separate node->filtered_out field is so that the file chooser can query whether
* a (filtered-out) folder should be made sensitive in the GUI.
*
* Visible rows vs. possibly-invisible nodes
* -----------------------------------------
*
* Since not all nodes in the model->files array may be visible, we need a way to map visible row indexes from
* the treeview to array indexes in our array of files. And thus we introduce a bit of terminology:
*
* index - An index in the model->files array. All variables/fields that represent indexes are either called
* “index” or “i_*”, or simply “i” for things like loop counters.
*
* row - An index in the GtkTreeView, i.e. the index of a row within the outward-facing API of the
* GtkFileSystemModel. However, note that our rows are 1-based, not 0-based, for the reason explained in the
* following paragraph. Variables/fields that represent visible rows are called “row”, or “r_*”, or simply
* “r”.
*
* Each FileModelNode has a node->row field which is the number of visible rows in the treeview, *before and
* including* that node. This means that node->row is 1-based, instead of 0-based --- this makes some code
* simpler, believe it or not :) This also means that when the calling GtkTreeView gives us a GtkTreePath, we
* turn the 0-based treepath into a 1-based row for our purposes. If a node is not visible, it will have the
* same row number as its closest preceding visible node.
*
* We try to compute the node->row fields lazily. A node is said to be “valid” if its node->row is accurate.
* For this, the model keeps a model->n_nodes_valid field which is the count of valid nodes starting from the
* beginning of the model->files array. When a node changes its information, or when a node gets deleted, that
* node and the following ones get invalidated by simply setting model->n_nodes_valid to the array index of the
* node. If the model happens to need a node’s row number and that node is in the model->files array after
* model->n_nodes_valid, then the nodes get re-validated up to the sought node. See node_validate_rows() for
* this logic.
*
* You never access a node->row directly. Instead, call node_get_tree_row(). That function will validate the nodes
* up to the sought one if the node is not valid yet, and it will return a proper 0-based row.
*
* Sorting
* -------
*
* The model implements the GtkTreeSortable interface. To avoid re-sorting
* every time a node gets added (which would lead to O(n^2) performance during
* the initial population of the model), the model can freeze itself (with
* freeze_updates()) during the intial population process. When the model is
* frozen, sorting will not happen. The model will sort itself when the freeze
* count goes back to zero, via corresponding calls to thaw_updates().
*/
/*** DEFINES ***/
/* priority used for all async callbacks in the main loop
* This should be higher than redraw priorities so multiple callbacks
* firing can be handled without intermediate redraws */
#define IO_PRIORITY G_PRIORITY_DEFAULT
/* random number that everyone else seems to use, too */
#define FILES_PER_QUERY 100
typedef struct _FileModelNode FileModelNode;
typedef struct _GtkFileSystemModelClass GtkFileSystemModelClass;
struct _FileModelNode
{
GFile * file; /* file represented by this node or NULL for editable */
GFileInfo * info; /* info for this file or NULL if unknown */
guint row; /* if valid (see model->n_valid_indexes), visible nodes before and including
* this one - see the "Structure" comment above.
*/
guint visible :1; /* if the file is currently visible */
guint filtered_out :1;/* if the file is currently filtered out (i.e. it didn't pass the filters) */
guint frozen_add :1; /* true if the model was frozen and the entry has not been added yet */
GValue values[1]; /* actually n_columns values */
};
struct _GtkFileSystemModel
{
GObject parent_instance;
GFile * dir; /* directory that's displayed */
guint dir_thaw_source;/* GSource id for unfreezing the model */
char * attributes; /* attributes the file info must contain, or NULL for all attributes */
GFileMonitor * dir_monitor; /* directory that is monitored, or NULL if monitoring was not supported */
GCancellable * cancellable; /* cancellable in use for all operations - cancelled on dispose */
GArray * files; /* array of FileModelNode containing all our files */
gsize node_size; /* Size of a FileModelNode structure once its ->values field has n_columns */
guint n_nodes_valid; /* count of valid nodes (i.e. those whose node->row is accurate) */
GHashTable * file_lookup; /* mapping of GFile => array index in model->files
* This hash table doesn't always have the same number of entries as the files array;
* it can get cleared completely when we resort.
* The hash table gets re-populated in node_get_for_file() if this mismatch is
* detected.
*/
guint n_columns; /* number of columns */
GType * column_types; /* types of each column */
GtkFileSystemModelGetValue get_func; /* function to call to fill in values in columns */
gpointer get_data; /* data to pass to get_func */
GtkFileFilter * filter; /* filter to use for deciding which nodes are visible */
int sort_column_id; /* current sorting column */
GtkSortType sort_order; /* current sorting order */
GList * sort_list; /* list of sorting functions */
GtkTreeIterCompareFunc default_sort_func; /* default sort function */
gpointer default_sort_data; /* data to pass to default sort func */
GDestroyNotify default_sort_destroy; /* function to call to destroy default_sort_data */
guint frozen; /* number of times we're frozen */
gboolean filter_on_thaw :1;/* set when filtering needs to happen upon thawing */
gboolean sort_on_thaw :1;/* set when sorting needs to happen upon thawing */
guint show_hidden :1; /* whether to show hidden files */
guint show_folders :1;/* whether to show folders */
guint show_files :1; /* whether to show files */
guint filter_folders :1;/* whether filter applies to folders */
};
#define GTK_FILE_SYSTEM_MODEL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_FILE_SYSTEM_MODEL, GtkFileSystemModelClass))
#define GTK_IS_FILE_SYSTEM_MODEL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_FILE_SYSTEM_MODEL))
#define GTK_FILE_SYSTEM_MODEL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_FILE_SYSTEM_MODEL, GtkFileSystemModelClass))
struct _GtkFileSystemModelClass
{
GObjectClass parent_class;
/* Signals */
void (*finished_loading) (GtkFileSystemModel *model, GError *error);
};
static void freeze_updates (GtkFileSystemModel *model);
static void thaw_updates (GtkFileSystemModel *model);
static guint node_get_for_file (GtkFileSystemModel *model,
GFile *file);
static void add_file (GtkFileSystemModel *model,
GFile *file,
GFileInfo *info);
static void remove_file (GtkFileSystemModel *model,
GFile *file);
/* iter setup:
* @user_data: the model
* @user_data2: GUINT_TO_POINTER of array index of current entry
*
* All other fields are unused. Note that the array index does not corrspond
* 1:1 with the path index as entries might not be visible.
*/
#define ITER_INDEX(iter) GPOINTER_TO_UINT((iter)->user_data2)
#define ITER_IS_VALID(model, iter) ((model) == (iter)->user_data)
#define ITER_INIT_FROM_INDEX(model, _iter, _index) G_STMT_START {\
g_assert (_index < (model)->files->len); \
(_iter)->user_data = (model); \
(_iter)->user_data2 = GUINT_TO_POINTER (_index); \
}G_STMT_END
/*** FileModelNode ***/
/* Get a FileModelNode structure given an index in the model->files array of nodes */
#define get_node(_model, _index) ((FileModelNode *) ((_model)->files->data + (_index) * (_model)->node_size))
/* Get an index within the model->files array of nodes, given a FileModelNode* */
#define node_index(_model, _node) (((gchar *) (_node) - (_model)->files->data) / (_model)->node_size)
/* @up_to_index: smallest model->files array index that will be valid after this call
* @up_to_row: smallest node->row that will be valid after this call
*
* If you want to validate up to an index or up to a row, specify the index or
* the row you want and specify G_MAXUINT for the other argument. Pass
* G_MAXUINT for both arguments for “validate everything”.
*/
static void
node_validate_rows (GtkFileSystemModel *model, guint up_to_index, guint up_to_row)
{
guint i, row;
if (model->files->len == 0)
return;
up_to_index = MIN (up_to_index, model->files->len - 1);
i = model->n_nodes_valid;
if (i != 0)
row = get_node (model, i - 1)->row;
else
row = 0;
while (i <= up_to_index && row <= up_to_row)
{
FileModelNode *node = get_node (model, i);
if (node->visible)
row++;
node->row = row;
i++;
}
model->n_nodes_valid = i;
}
static guint
node_get_tree_row (GtkFileSystemModel *model, guint index)
{
if (model->n_nodes_valid <= index)
node_validate_rows (model, index, G_MAXUINT);
return get_node (model, index)->row - 1;
}
static void
node_invalidate_index (GtkFileSystemModel *model, guint id)
{
model->n_nodes_valid = MIN (model->n_nodes_valid, id);
}
static GtkTreePath *
tree_path_new_from_node (GtkFileSystemModel *model, guint id)
{
guint r = node_get_tree_row (model, id);
g_assert (r < model->files->len);
return gtk_tree_path_new_from_indices (r, -1);
}
static void
emit_row_inserted_for_node (GtkFileSystemModel *model, guint id)
{
GtkTreePath *path;
GtkTreeIter iter;
path = tree_path_new_from_node (model, id);
ITER_INIT_FROM_INDEX (model, &iter, id);
gtk_tree_model_row_inserted (GTK_TREE_MODEL (model), path, &iter);
gtk_tree_path_free (path);
}
static void
emit_row_changed_for_node (GtkFileSystemModel *model, guint id)
{
GtkTreePath *path;
GtkTreeIter iter;
path = tree_path_new_from_node (model, id);
ITER_INIT_FROM_INDEX (model, &iter, id);
gtk_tree_model_row_changed (GTK_TREE_MODEL (model), path, &iter);
gtk_tree_path_free (path);
}
static void
emit_row_deleted_for_row (GtkFileSystemModel *model, guint row)
{
GtkTreePath *path;
path = gtk_tree_path_new_from_indices (row, -1);
gtk_tree_model_row_deleted (GTK_TREE_MODEL (model), path);
gtk_tree_path_free (path);
}
static void
node_set_visible_and_filtered_out (GtkFileSystemModel *model, guint id, gboolean visible, gboolean filtered_out)
{
FileModelNode *node = get_node (model, id);
/* Filteredness */
if (node->filtered_out != filtered_out)
{
node->filtered_out = filtered_out;
if (node->visible && visible)
emit_row_changed_for_node (model, id);
}
/* Visibility */
if (node->visible == visible ||
node->frozen_add)
return;
if (visible)
{
node->visible = TRUE;
node_invalidate_index (model, id);
emit_row_inserted_for_node (model, id);
}
else
{
guint row;
row = node_get_tree_row (model, id);
g_assert (row < model->files->len);
node->visible = FALSE;
node_invalidate_index (model, id);
emit_row_deleted_for_row (model, row);
}
}
static gboolean
node_should_be_filtered_out (GtkFileSystemModel *model, guint id)
{
FileModelNode *node = get_node (model, id);
GtkFileFilterInfo filter_info = { 0, };
GtkFileFilterFlags required;
gboolean result;
char *mime_type = NULL;
char *filename = NULL;
char *uri = NULL;
if (node->info == NULL)
return TRUE;
if (model->filter == NULL)
return FALSE;
/* fill info */
required = gtk_file_filter_get_needed (model->filter);
filter_info.contains = GTK_FILE_FILTER_DISPLAY_NAME;
filter_info.display_name = g_file_info_get_display_name (node->info);
if (required & GTK_FILE_FILTER_MIME_TYPE)
{
const char *s = g_file_info_get_content_type (node->info);
if (s)
{
mime_type = g_content_type_get_mime_type (s);
if (mime_type)
{
filter_info.mime_type = mime_type;
filter_info.contains |= GTK_FILE_FILTER_MIME_TYPE;
}
}
}
if (required & GTK_FILE_FILTER_FILENAME)
{
filename = g_file_get_path (node->file);
if (filename)
{
filter_info.filename = filename;
filter_info.contains |= GTK_FILE_FILTER_FILENAME;
}
}
if (required & GTK_FILE_FILTER_URI)
{
uri = g_file_get_uri (node->file);
if (uri)
{
filter_info.uri = uri;
filter_info.contains |= GTK_FILE_FILTER_URI;
}
}
result = !gtk_file_filter_filter (model->filter, &filter_info);
g_free (mime_type);
g_free (filename);
g_free (uri);
return result;
}
static gboolean
node_should_be_visible (GtkFileSystemModel *model, guint id, gboolean filtered_out)
{
FileModelNode *node = get_node (model, id);
gboolean result;
if (node->info == NULL)
return FALSE;
if (!model->show_hidden &&
(g_file_info_get_is_hidden (node->info) || g_file_info_get_is_backup (node->info)))
return FALSE;
if (_gtk_file_info_consider_as_directory (node->info))
{
if (!model->show_folders)
return FALSE;
if (!model->filter_folders)
return TRUE;
}
else
{
if (!model->show_files)
return FALSE;
}
result = !filtered_out;
return result;
}
static void
node_compute_visibility_and_filters (GtkFileSystemModel *model, guint id)
{
gboolean filtered_out;
gboolean visible;
filtered_out = node_should_be_filtered_out (model, id);
visible = node_should_be_visible (model, id, filtered_out);
node_set_visible_and_filtered_out (model, id, visible, filtered_out);
}
/*** GtkTreeModel ***/
static GtkTreeModelFlags
gtk_file_system_model_get_flags (GtkTreeModel *tree_model)
{
/* GTK_TREE_MODEL_ITERS_PERSIST doesn't work with arrays :( */
return GTK_TREE_MODEL_LIST_ONLY;
}
static gint
gtk_file_system_model_get_n_columns (GtkTreeModel *tree_model)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
return model->n_columns;
}
static GType
gtk_file_system_model_get_column_type (GtkTreeModel *tree_model,
gint i)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
g_return_val_if_fail (i >= 0 && (guint) i < model->n_columns, G_TYPE_NONE);
return model->column_types[i];
}
static int
compare_indices (gconstpointer key, gconstpointer _node)
{
const FileModelNode *node = _node;
return GPOINTER_TO_UINT (key) - node->row;
}
static gboolean
gtk_file_system_model_iter_nth_child (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent,
gint n)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
char *node;
guint id;
guint row_to_find;
g_return_val_if_fail (n >= 0, FALSE);
if (parent != NULL)
return FALSE;
row_to_find = n + 1; /* plus one as our node->row numbers are 1-based; see the "Structure" comment at the beginning */
if (model->n_nodes_valid > 0 &&
get_node (model, model->n_nodes_valid - 1)->row >= row_to_find)
{
/* Fast path - the nodes are valid up to the sought one.
*
* First, find a node with the sought row number...*/
node = bsearch (GUINT_TO_POINTER (row_to_find),
model->files->data,
model->n_nodes_valid,
model->node_size,
compare_indices);
if (node == NULL)
return FALSE;
/* ... Second, back up until we find the first visible node with that row number */
id = node_index (model, node);
while (!get_node (model, id)->visible)
id--;
g_assert (get_node (model, id)->row == row_to_find);
}
else
{
/* Slow path - the nodes need to be validated up to the sought one */
node_validate_rows (model, G_MAXUINT, n); /* note that this is really "n", not row_to_find - see node_validate_rows() */
id = model->n_nodes_valid - 1;
if (model->n_nodes_valid == 0 || get_node (model, id)->row != row_to_find)
return FALSE;
}
ITER_INIT_FROM_INDEX (model, iter, id);
return TRUE;
}
static gboolean
gtk_file_system_model_get_iter (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreePath *path)
{
g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE);
if (gtk_tree_path_get_depth (path) > 1)
return FALSE;
return gtk_file_system_model_iter_nth_child (tree_model,
iter,
NULL,
gtk_tree_path_get_indices (path)[0]);
}
static GtkTreePath *
gtk_file_system_model_get_path (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
g_return_val_if_fail (ITER_IS_VALID (model, iter), NULL);
return tree_path_new_from_node (model, ITER_INDEX (iter));
}
static void
gtk_file_system_model_get_value (GtkTreeModel *tree_model,
GtkTreeIter *iter,
gint column,
GValue *value)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
const GValue *original;
g_return_if_fail ((guint) column < model->n_columns);
g_return_if_fail (ITER_IS_VALID (model, iter));
original = _gtk_file_system_model_get_value (model, iter, column);
if (original)
{
g_value_init (value, G_VALUE_TYPE (original));
g_value_copy (original, value);
}
else
g_value_init (value, model->column_types[column]);
}
static gboolean
gtk_file_system_model_iter_next (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
guint i;
g_return_val_if_fail (ITER_IS_VALID (model, iter), FALSE);
for (i = ITER_INDEX (iter) + 1; i < model->files->len; i++)
{
FileModelNode *node = get_node (model, i);
if (node->visible)
{
ITER_INIT_FROM_INDEX (model, iter, i);
return TRUE;
}
}
return FALSE;
}
static gboolean
gtk_file_system_model_iter_children (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent)
{
return FALSE;
}
static gboolean
gtk_file_system_model_iter_has_child (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
return FALSE;
}
static gint
gtk_file_system_model_iter_n_children (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (tree_model);
if (iter)
return 0;
return node_get_tree_row (model, model->files->len - 1) + 1;
}
static gboolean
gtk_file_system_model_iter_parent (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *child)
{
return FALSE;
}
static void
gtk_file_system_model_ref_node (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
/* nothing to do */
}
static void
gtk_file_system_model_unref_node (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
/* nothing to do */
}
static void
gtk_file_system_model_iface_init (GtkTreeModelIface *iface)
{
iface->get_flags = gtk_file_system_model_get_flags;
iface->get_n_columns = gtk_file_system_model_get_n_columns;
iface->get_column_type = gtk_file_system_model_get_column_type;
iface->get_iter = gtk_file_system_model_get_iter;
iface->get_path = gtk_file_system_model_get_path;
iface->get_value = gtk_file_system_model_get_value;
iface->iter_next = gtk_file_system_model_iter_next;
iface->iter_children = gtk_file_system_model_iter_children;
iface->iter_has_child = gtk_file_system_model_iter_has_child;
iface->iter_n_children = gtk_file_system_model_iter_n_children;
iface->iter_nth_child = gtk_file_system_model_iter_nth_child;
iface->iter_parent = gtk_file_system_model_iter_parent;
iface->ref_node = gtk_file_system_model_ref_node;
iface->unref_node = gtk_file_system_model_unref_node;
}
/*** GtkTreeSortable ***/
typedef struct _SortData SortData;
struct _SortData {
GtkFileSystemModel * model;
GtkTreeIterCompareFunc func;
gpointer data;
int order; /* -1 to invert sort order or 1 to keep it */
};
/* returns FALSE if no sort necessary */
static gboolean
sort_data_init (SortData *data, GtkFileSystemModel *model)
{
GtkTreeDataSortHeader *header;
if (model->files->len <= 2)
return FALSE;
switch (model->sort_column_id)
{
case GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID:
if (!model->default_sort_func)
return FALSE;
data->func = model->default_sort_func;
data->data = model->default_sort_data;
break;
case GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID:
return FALSE;
default:
header = _gtk_tree_data_list_get_header (model->sort_list, model->sort_column_id);
if (header == NULL)
return FALSE;
data->func = header->func;
data->data = header->data;
break;
}
data->order = model->sort_order == GTK_SORT_DESCENDING ? -1 : 1;
data->model = model;
return TRUE;
}
static int
compare_array_element (gconstpointer a, gconstpointer b, gpointer user_data)
{
SortData *data = user_data;
GtkTreeIter itera, iterb;
ITER_INIT_FROM_INDEX (data->model, &itera, node_index (data->model, a));
ITER_INIT_FROM_INDEX (data->model, &iterb, node_index (data->model, b));
return data->func (GTK_TREE_MODEL (data->model), &itera, &iterb, data->data) * data->order;
}
static void
gtk_file_system_model_sort (GtkFileSystemModel *model)
{
SortData data;
if (model->frozen)
{
model->sort_on_thaw = TRUE;
return;
}
if (sort_data_init (&data, model))
{
GtkTreePath *path;
guint i;
guint r, n_visible_rows;
node_validate_rows (model, G_MAXUINT, G_MAXUINT);
n_visible_rows = node_get_tree_row (model, model->files->len - 1) + 1;
model->n_nodes_valid = 0;
g_hash_table_remove_all (model->file_lookup);
g_qsort_with_data (get_node (model, 1), /* start at index 1; don't sort the editable row */
model->files->len - 1,
model->node_size,
compare_array_element,
&data);
g_assert (model->n_nodes_valid == 0);
g_assert (g_hash_table_size (model->file_lookup) == 0);
if (n_visible_rows)
{
int *new_order = g_new (int, n_visible_rows);
r = 0;
for (i = 0; i < model->files->len; i++)
{
FileModelNode *node = get_node (model, i);
if (!node->visible)
{
node->row = r;
continue;
}
new_order[r] = node->row - 1;
r++;
node->row = r;
}
g_assert (r == n_visible_rows);
path = gtk_tree_path_new ();
gtk_tree_model_rows_reordered (GTK_TREE_MODEL (model),
path,
NULL,
new_order);
gtk_tree_path_free (path);
g_free (new_order);
}
}
model->sort_on_thaw = FALSE;
}
static void
gtk_file_system_model_sort_node (GtkFileSystemModel *model, guint node)
{
/* FIXME: improve */
gtk_file_system_model_sort (model);
}
static gboolean
gtk_file_system_model_get_sort_column_id (GtkTreeSortable *sortable,
gint *sort_column_id,
GtkSortType *order)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (sortable);
if (sort_column_id)
*sort_column_id = model->sort_column_id;
if (order)
*order = model->sort_order;
if (model->sort_column_id == GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID ||
model->sort_column_id == GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID)
return FALSE;
return TRUE;
}
static void
gtk_file_system_model_set_sort_column_id (GtkTreeSortable *sortable,
gint sort_column_id,
GtkSortType order)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (sortable);
if ((model->sort_column_id == sort_column_id) &&
(model->sort_order == order))
return;
if (sort_column_id != GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID)
{
if (sort_column_id != GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID)
{
GtkTreeDataSortHeader *header = NULL;
header = _gtk_tree_data_list_get_header (model->sort_list,
sort_column_id);
/* We want to make sure that we have a function */
g_return_if_fail (header != NULL);
g_return_if_fail (header->func != NULL);
}
else
{
g_return_if_fail (model->default_sort_func != NULL);
}
}
model->sort_column_id = sort_column_id;
model->sort_order = order;
gtk_tree_sortable_sort_column_changed (sortable);
gtk_file_system_model_sort (model);
}
static void
gtk_file_system_model_set_sort_func (GtkTreeSortable *sortable,
gint sort_column_id,
GtkTreeIterCompareFunc func,
gpointer data,
GDestroyNotify destroy)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (sortable);
model->sort_list = _gtk_tree_data_list_set_header (model->sort_list,
sort_column_id,
func, data, destroy);
if (model->sort_column_id == sort_column_id)
gtk_file_system_model_sort (model);
}
static void
gtk_file_system_model_set_default_sort_func (GtkTreeSortable *sortable,
GtkTreeIterCompareFunc func,
gpointer data,
GDestroyNotify destroy)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (sortable);
if (model->default_sort_destroy)
{
GDestroyNotify d = model->default_sort_destroy;
model->default_sort_destroy = NULL;
d (model->default_sort_data);
}
model->default_sort_func = func;
model->default_sort_data = data;
model->default_sort_destroy = destroy;
if (model->sort_column_id == GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID)
gtk_file_system_model_sort (model);
}
static gboolean
gtk_file_system_model_has_default_sort_func (GtkTreeSortable *sortable)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (sortable);
return (model->default_sort_func != NULL);
}
static void
gtk_file_system_model_sortable_init (GtkTreeSortableIface *iface)
{
iface->get_sort_column_id = gtk_file_system_model_get_sort_column_id;
iface->set_sort_column_id = gtk_file_system_model_set_sort_column_id;
iface->set_sort_func = gtk_file_system_model_set_sort_func;
iface->set_default_sort_func = gtk_file_system_model_set_default_sort_func;
iface->has_default_sort_func = gtk_file_system_model_has_default_sort_func;
}
/*** GtkTreeDragSource ***/
static gboolean
drag_source_row_draggable (GtkTreeDragSource *drag_source,
GtkTreePath *path)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (drag_source);
GtkTreeIter iter;
if (!gtk_file_system_model_get_iter (GTK_TREE_MODEL (model), &iter, path))
return FALSE;
return ITER_INDEX (&iter) != 0;
}
static gboolean
drag_source_drag_data_get (GtkTreeDragSource *drag_source,
GtkTreePath *path,
GtkSelectionData *selection_data)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (drag_source);
FileModelNode *node;
GtkTreeIter iter;
char *uris[2];
if (!gtk_file_system_model_get_iter (GTK_TREE_MODEL (model), &iter, path))
return FALSE;
node = get_node (model, ITER_INDEX (&iter));
if (node->file == NULL)
return FALSE;
uris[0] = g_file_get_uri (node->file);
uris[1] = NULL;
gtk_selection_data_set_uris (selection_data, uris);
g_free (uris[0]);
return TRUE;
}
static void
drag_source_iface_init (GtkTreeDragSourceIface *iface)
{
iface->row_draggable = drag_source_row_draggable;
iface->drag_data_get = drag_source_drag_data_get;
iface->drag_data_delete = NULL;
}
/*** GtkFileSystemModel ***/
/* Signal IDs */
enum {
FINISHED_LOADING,
LAST_SIGNAL
};
static guint file_system_model_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_CODE (GtkFileSystemModel, _gtk_file_system_model, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_MODEL,
gtk_file_system_model_iface_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_SORTABLE,
gtk_file_system_model_sortable_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_SOURCE,
drag_source_iface_init))
static void
gtk_file_system_model_dispose (GObject *object)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (object);
if (model->dir_thaw_source)
{
g_source_remove (model->dir_thaw_source);
model->dir_thaw_source = 0;
}
g_cancellable_cancel (model->cancellable);
if (model->dir_monitor)
g_file_monitor_cancel (model->dir_monitor);
G_OBJECT_CLASS (_gtk_file_system_model_parent_class)->dispose (object);
}
static void
gtk_file_system_model_finalize (GObject *object)
{
GtkFileSystemModel *model = GTK_FILE_SYSTEM_MODEL (object);
guint i;
for (i = 0; i < model->files->len; i++)
{
int v;
FileModelNode *node = get_node (model, i);
if (node->file)
g_object_unref (node->file);
if (node->info)
g_object_unref (node->info);
for (v = 0; v < model->n_columns; v++)
if (G_VALUE_TYPE (&node->values[v]) != G_TYPE_INVALID)
g_value_unset (&node->values[v]);
}
g_array_free (model->files, TRUE);
g_object_unref (model->cancellable);
g_free (model->attributes);
if (model->dir)
g_object_unref (model->dir);
if (model->dir_monitor)
g_object_unref (model->dir_monitor);
g_hash_table_destroy (model->file_lookup);
if (model->filter)
g_object_unref (model->filter);
g_slice_free1 (sizeof (GType) * model->n_columns, model->column_types);
_gtk_tree_data_list_header_free (model->sort_list);
if (model->default_sort_destroy)
model->default_sort_destroy (model->default_sort_data);
G_OBJECT_CLASS (_gtk_file_system_model_parent_class)->finalize (object);
}
static void
_gtk_file_system_model_class_init (GtkFileSystemModelClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
gobject_class->finalize = gtk_file_system_model_finalize;
gobject_class->dispose = gtk_file_system_model_dispose;
file_system_model_signals[FINISHED_LOADING] =
g_signal_new (I_("finished-loading"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkFileSystemModelClass, finished_loading),
NULL, NULL,
_gtk_marshal_VOID__POINTER,
G_TYPE_NONE, 1, G_TYPE_POINTER);
}
static void
_gtk_file_system_model_init (GtkFileSystemModel *model)
{
model->show_files = TRUE;
model->show_folders = TRUE;
model->show_hidden = FALSE;
model->filter_folders = FALSE;
model->sort_column_id = GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID;
model->file_lookup = g_hash_table_new (g_file_hash, (GEqualFunc) g_file_equal);
model->cancellable = g_cancellable_new ();
}
/*** API ***/
static void
gtk_file_system_model_closed_enumerator (GObject *object, GAsyncResult *res, gpointer data)
{
g_file_enumerator_close_finish (G_FILE_ENUMERATOR (object), res, NULL);
}
static gboolean
thaw_func (gpointer data)
{
GtkFileSystemModel *model = data;
thaw_updates (model);
model->dir_thaw_source = 0;
return FALSE;
}
static void
gtk_file_system_model_got_files (GObject *object, GAsyncResult *res, gpointer data)
{
GFileEnumerator *enumerator = G_FILE_ENUMERATOR (object);
GtkFileSystemModel *model = data;
GList *walk, *files;
GError *error = NULL;
gdk_threads_enter ();
files = g_file_enumerator_next_files_finish (enumerator, res, &error);
if (files)
{
if (model->dir_thaw_source == 0)
{
freeze_updates (model);
model->dir_thaw_source = gdk_threads_add_timeout_full (IO_PRIORITY + 1,
50,
thaw_func,
model,
NULL);
g_source_set_name_by_id (model->dir_thaw_source, "[gtk+] thaw_func");
}
for (walk = files; walk; walk = walk->next)
{
const char *name;
GFileInfo *info;
GFile *file;
info = walk->data;
name = g_file_info_get_name (info);
if (name == NULL)
{
/* Shouldn't happen, but the APIs allow it */
g_object_unref (info);
continue;
}
file = g_file_get_child (model->dir, name);
add_file (model, file, info);
g_object_unref (file);
g_object_unref (info);
}
g_list_free (files);
g_file_enumerator_next_files_async (enumerator,
g_file_is_native (model->dir) ? 50 * FILES_PER_QUERY : FILES_PER_QUERY,
IO_PRIORITY,
model->cancellable,
gtk_file_system_model_got_files,
model);
}
else
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
g_file_enumerator_close_async (enumerator,
IO_PRIORITY,
model->cancellable,
gtk_file_system_model_closed_enumerator,
NULL);
if (model->dir_thaw_source != 0)
{
g_source_remove (model->dir_thaw_source);
model->dir_thaw_source = 0;
thaw_updates (model);
}
g_signal_emit (model, file_system_model_signals[FINISHED_LOADING], 0, error);
}
if (error)
g_error_free (error);
}
gdk_threads_leave ();
}
static void
gtk_file_system_model_query_done (GObject * object,
GAsyncResult *res,
gpointer data)
{
GtkFileSystemModel *model = data; /* only a valid pointer if not cancelled */
GFile *file = G_FILE (object);
GFileInfo *info;
guint id;
info = g_file_query_info_finish (file, res, NULL);
if (info == NULL)
return;
gdk_threads_enter ();
_gtk_file_system_model_update_file (model, file, info);
id = node_get_for_file (model, file);
gtk_file_system_model_sort_node (model, id);
g_object_unref (info);
gdk_threads_leave ();
}
static void
gtk_file_system_model_monitor_change (GFileMonitor * monitor,
GFile * file,
GFile * other_file,
GFileMonitorEvent type,
GtkFileSystemModel *model)
{
switch (type)
{
case G_FILE_MONITOR_EVENT_CREATED:
case G_FILE_MONITOR_EVENT_CHANGED:
case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
/* We can treat all of these the same way */
g_file_query_info_async (file,
model->attributes,
G_FILE_QUERY_INFO_NONE,
IO_PRIORITY,
model->cancellable,
gtk_file_system_model_query_done,
model);
break;
case G_FILE_MONITOR_EVENT_DELETED:
gdk_threads_enter ();
remove_file (model, file);
gdk_threads_leave ();
break;
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
/* FIXME: use freeze/thaw with this somehow? */
case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
case G_FILE_MONITOR_EVENT_UNMOUNTED:
default:
/* ignore these */
break;
}
}
static void
gtk_file_system_model_got_enumerator (GObject *dir, GAsyncResult *res, gpointer data)
{
GtkFileSystemModel *model = data;
GFileEnumerator *enumerator;
GError *error = NULL;
gdk_threads_enter ();
enumerator = g_file_enumerate_children_finish (G_FILE (dir), res, &error);
if (enumerator == NULL)
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
g_signal_emit (model, file_system_model_signals[FINISHED_LOADING], 0, error);
g_error_free (error);
}
}
else
{
g_file_enumerator_next_files_async (enumerator,
g_file_is_native (model->dir) ? 50 * FILES_PER_QUERY : FILES_PER_QUERY,
IO_PRIORITY,
model->cancellable,
gtk_file_system_model_got_files,
model);
g_object_unref (enumerator);
model->dir_monitor = g_file_monitor_directory (model->dir,
G_FILE_MONITOR_NONE,
model->cancellable,
NULL); /* we don't mind if directory monitoring isn't supported, so the GError is NULL here */
if (model->dir_monitor)
g_signal_connect (model->dir_monitor,
"changed",
G_CALLBACK (gtk_file_system_model_monitor_change),
model);
}
gdk_threads_leave ();
}
static void
gtk_file_system_model_set_n_columns (GtkFileSystemModel *model,
gint n_columns,
va_list args)
{
guint i;
g_assert (model->files == NULL);
g_assert (n_columns > 0);
model->n_columns = n_columns;
model->column_types = g_slice_alloc (sizeof (GType) * n_columns);
model->node_size = sizeof (FileModelNode) + sizeof (GValue) * (n_columns - 1); /* minus 1 because FileModelNode.values[] has a default size of 1 */
for (i = 0; i < (guint) n_columns; i++)
{
GType type = va_arg (args, GType);
if (! _gtk_tree_data_list_check_type (type))
{
g_error ("%s: type %s cannot be a column type for GtkFileSystemModel\n", G_STRLOC, g_type_name (type));
return; /* not reached */
}
model->column_types[i] = type;
}
model->sort_list = _gtk_tree_data_list_header_new (n_columns, model->column_types);
model->files = g_array_sized_new (FALSE, FALSE, model->node_size, FILES_PER_QUERY);
/* add editable node at start */
g_array_set_size (model->files, 1);
memset (get_node (model, 0), 0, model->node_size);
}
static void
gtk_file_system_model_set_directory (GtkFileSystemModel *model,
GFile * dir,
const gchar * attributes)
{
g_assert (G_IS_FILE (dir));
model->dir = g_object_ref (dir);
model->attributes = g_strdup (attributes);
g_file_enumerate_children_async (model->dir,
attributes,
G_FILE_QUERY_INFO_NONE,
IO_PRIORITY,
model->cancellable,
gtk_file_system_model_got_enumerator,
model);
}
static GtkFileSystemModel *
_gtk_file_system_model_new_valist (GtkFileSystemModelGetValue get_func,
gpointer get_data,
guint n_columns,
va_list args)
{
GtkFileSystemModel *model;
model = g_object_new (GTK_TYPE_FILE_SYSTEM_MODEL, NULL);
model->get_func = get_func;
model->get_data = get_data;
gtk_file_system_model_set_n_columns (model, n_columns, args);
return model;
}
/**
* _gtk_file_system_model_new:
* @get_func: function to call for getting a value
* @get_data: user data argument passed to @get_func
* @n_columns: number of columns
* @...: @n_columns #GType types for the columns
*
* Creates a new #GtkFileSystemModel object. You need to add files
* to the list using _gtk_file_system_model_add_and_query_file()
* or _gtk_file_system_model_update_file().
*
* Returns: the newly created #GtkFileSystemModel
**/
GtkFileSystemModel *
_gtk_file_system_model_new (GtkFileSystemModelGetValue get_func,
gpointer get_data,
guint n_columns,
...)
{
GtkFileSystemModel *model;
va_list args;
g_return_val_if_fail (get_func != NULL, NULL);
g_return_val_if_fail (n_columns > 0, NULL);
va_start (args, n_columns);
model = _gtk_file_system_model_new_valist (get_func, get_data, n_columns, args);
va_end (args);
return model;
}
/**
* _gtk_file_system_model_new_for_directory:
* @directory: the directory to show.
* @attributes: (allow-none): attributes to immediately load or %NULL for all
* @get_func: function that the model should call to query data about a file
* @get_data: user data to pass to the @get_func
* @n_columns: number of columns
* @...: @n_columns #GType types for the columns
*
* Creates a new #GtkFileSystemModel object. The #GtkFileSystemModel
* object wraps the given @directory as a #GtkTreeModel.
* The model will query the given directory with the given @attributes
* and add all files inside the directory automatically. If supported,
* it will also monitor the drectory and update the model's
* contents to reflect changes, if the @directory supports monitoring.
*
* Returns: the newly created #GtkFileSystemModel
**/
GtkFileSystemModel *
_gtk_file_system_model_new_for_directory (GFile * dir,
const gchar * attributes,
GtkFileSystemModelGetValue get_func,
gpointer get_data,
guint n_columns,
...)
{
GtkFileSystemModel *model;
va_list args;
g_return_val_if_fail (G_IS_FILE (dir), NULL);
g_return_val_if_fail (get_func != NULL, NULL);
g_return_val_if_fail (n_columns > 0, NULL);
va_start (args, n_columns);
model = _gtk_file_system_model_new_valist (get_func, get_data, n_columns, args);
va_end (args);
gtk_file_system_model_set_directory (model, dir, attributes);
return model;
}
static void
gtk_file_system_model_refilter_all (GtkFileSystemModel *model)
{
guint i;
if (model->frozen)
{
model->filter_on_thaw = TRUE;
return;
}
freeze_updates (model);
/* start at index 1, don't change the editable */
for (i = 1; i < model->files->len; i++)
node_compute_visibility_and_filters (model, i);
model->filter_on_thaw = FALSE;
thaw_updates (model);
}
/**
* _gtk_file_system_model_set_show_hidden:
* @model: a #GtkFileSystemModel
* @show_hidden: whether hidden files should be displayed
*
* Sets whether hidden files should be included in the #GtkTreeModel
* for display.
**/
void
_gtk_file_system_model_set_show_hidden (GtkFileSystemModel *model,
gboolean show_hidden)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
show_hidden = show_hidden != FALSE;
if (show_hidden != model->show_hidden)
{
model->show_hidden = show_hidden;
gtk_file_system_model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_set_show_folders:
* @model: a #GtkFileSystemModel
* @show_folders: whether folders should be displayed
*
* Sets whether folders should be included in the #GtkTreeModel for
* display.
**/
void
_gtk_file_system_model_set_show_folders (GtkFileSystemModel *model,
gboolean show_folders)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
show_folders = show_folders != FALSE;
if (show_folders != model->show_folders)
{
model->show_folders = show_folders;
gtk_file_system_model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_set_show_files:
* @model: a #GtkFileSystemModel
* @show_files: whether files (as opposed to folders) should
* be displayed.
*
* Sets whether files (as opposed to folders) should be included
* in the #GtkTreeModel for display.
**/
void
_gtk_file_system_model_set_show_files (GtkFileSystemModel *model,
gboolean show_files)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
show_files = show_files != FALSE;
if (show_files != model->show_files)
{
model->show_files = show_files;
gtk_file_system_model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_set_filter_folders:
* @model: a #GtkFileSystemModel
* @filter_folders: whether the filter applies to folders
*
* Sets whether the filter set by _gtk_file_system_model_set_filter()
* applies to folders. By default, it does not and folders are always
* visible.
**/
void
_gtk_file_system_model_set_filter_folders (GtkFileSystemModel *model,
gboolean filter_folders)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
filter_folders = filter_folders != FALSE;
if (filter_folders != model->filter_folders)
{
model->filter_folders = filter_folders;
gtk_file_system_model_refilter_all (model);
}
}
/**
* _gtk_file_system_model_get_cancellable:
* @model: the model
*
* Gets the cancellable used by the @model. This is the cancellable used
* internally by the @model that will be cancelled when @model is
* disposed. So you can use it for operations that should be cancelled
* when the model goes away.
*
* Returns: The cancellable used by @model
**/
GCancellable *
_gtk_file_system_model_get_cancellable (GtkFileSystemModel *model)
{
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), NULL);
return model->cancellable;
}
/**
* _gtk_file_system_model_iter_is_visible:
* @model: the model
* @iter: a valid iterator
*
* Checks if the iterator is visible. A visible iterator references
* a row that is currently exposed using the #GtkTreeModel API. If
* the iterator is invisible, it references a file that is not shown
* for some reason, such as being filtered out by the current filter or
* being a hidden file.
*
* Returns: %TRUE if the iterator is visible
**/
gboolean
_gtk_file_system_model_iter_is_visible (GtkFileSystemModel *model,
GtkTreeIter *iter)
{
FileModelNode *node;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
node = get_node (model, ITER_INDEX (iter));
return node->visible;
}
/**
* _gtk_file_system_model_iter_is_filtered_out:
* @model: the model
* @iter: a valid iterator
*
* Checks if the iterator is filtered out. This is only useful for rows
* that refer to folders, as those are always visible regardless
* of what the current filter says. This function lets you see
* the results of the filter.
*
* Returns: %TRUE if the iterator passed the current filter; %FALSE if the
* filter would not have let the row pass.
**/
gboolean
_gtk_file_system_model_iter_is_filtered_out (GtkFileSystemModel *model,
GtkTreeIter *iter)
{
FileModelNode *node;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
node = get_node (model, ITER_INDEX (iter));
return node->filtered_out;
}
/**
* _gtk_file_system_model_get_info:
* @model: a #GtkFileSystemModel
* @iter: a #GtkTreeIter pointing to a row of @model
*
* Gets the #GFileInfo-struct for a particular row
* of @model.
*
* Returns: a #GFileInfo-struct. This value
* is owned by @model and must not be modified or freed.
* If you want to keep the information for later use,
* you must take a reference, since the #GFileInfo-struct may be
* freed on later changes to the file system. If you have
* called _gtk_file_system_model_add_editable() and the @iter
* corresponds to the row that this function returned, the
* return value will be NULL.
**/
GFileInfo *
_gtk_file_system_model_get_info (GtkFileSystemModel *model,
GtkTreeIter *iter)
{
FileModelNode *node;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), NULL);
g_return_val_if_fail (iter != NULL, NULL);
node = get_node (model, ITER_INDEX (iter));
g_assert (node->info == NULL || G_IS_FILE_INFO (node->info));
return node->info;
}
/**
* _gtk_file_system_model_get_file:
* @model: a #GtkFileSystemModel
* @iter: a #GtkTreeIter pointing to a row of @model
*
* Gets the file for a particular row in @model.
*
* Returns: the file. This object is owned by @model and
* or freed. If you want to save the path for later use,
* you must take a ref, since the object may be freed
* on later changes to the file system.
**/
GFile *
_gtk_file_system_model_get_file (GtkFileSystemModel *model,
GtkTreeIter *iter)
{
FileModelNode *node;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), NULL);
node = get_node (model, ITER_INDEX (iter));
return node->file;
}
/**
* _gtk_file_system_model_get_value:
* @model: a #GtkFileSystemModel
* @iter: a #GtkTreeIter pointing to a row of @model
* @column: the column to get the value for
*
* Gets the value associated with the given row @iter and @column.
* If no value is available yet and the default value should be used,
* %NULL is returned.
* This is a performance optimization for the calls
* gtk_tree_model_get() or gtk_tree_model_get_value(), which copy
* the value and spend a considerable amount of time in iterator
* lookups. Both of which are slow.
*
* Returns: a pointer to the actual value as stored in @model or %NULL
* if no value available yet.
**/
const GValue *
_gtk_file_system_model_get_value (GtkFileSystemModel *model,
GtkTreeIter * iter,
int column)
{
FileModelNode *node;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), NULL);
g_return_val_if_fail (column >= 0 && (guint) column < model->n_columns, NULL);
node = get_node (model, ITER_INDEX (iter));
if (!G_VALUE_TYPE (&node->values[column]))
{
g_value_init (&node->values[column], model->column_types[column]);
if (!model->get_func (model,
node->file,
node->info,
column,
&node->values[column],
model->get_data))
{
g_value_unset (&node->values[column]);
return NULL;
}
}
return &node->values[column];
}
static guint
node_get_for_file (GtkFileSystemModel *model,
GFile * file)
{
guint i;
i = GPOINTER_TO_UINT (g_hash_table_lookup (model->file_lookup, file));
if (i != 0)
return i;
/* Node 0 is the editable row and has no associated file or entry in the table, so we start counting from 1.
*
* The invariant here is that the files in model->files[n] for n < g_hash_table_size (model->file_lookup)
* are already added to the hash table. The table can get cleared when we re-sort; this loop merely rebuilds
* our (file -> index) mapping on demand.
*
* If we exit the loop, the next pending batch of mappings will be resolved when this function gets called again
* with another file that is not yet in the mapping.
*/
for (i = g_hash_table_size (model->file_lookup) + 1; i < model->files->len; i++)
{
FileModelNode *node = get_node (model, i);
g_hash_table_insert (model->file_lookup, node->file, GUINT_TO_POINTER (i));
if (g_file_equal (node->file, file))
return i;
}
return 0;
}
/**
* _gtk_file_system_model_get_iter_for_file:
* @model: the model
* @iter: the iterator to be initialized
* @file: the file to look up
*
* Initializes @iter to point to the row used for @file, if @file is part
* of the model. Note that upon successful return, @iter may point to an
* invisible row in the @model. Use
* _gtk_file_system_model_iter_is_visible() to make sure it is visible to
* the tree view.
*
* Returns: %TRUE if file is part of the model and @iter was initialized
**/
gboolean
_gtk_file_system_model_get_iter_for_file (GtkFileSystemModel *model,
GtkTreeIter *iter,
GFile * file)
{
guint i;
g_return_val_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (G_IS_FILE (file), FALSE);
i = node_get_for_file (model, file);
if (i == 0)
return FALSE;
ITER_INIT_FROM_INDEX (model, iter, i);
return TRUE;
}
/* When an element is added or removed to the model->files array, we need to
* update the model->file_lookup mappings of (node, index), as the indexes
* change. This function adds the specified increment to the index in that pair
* if the index is equal or after the specified id. We use this to slide the
* mappings up or down when a node is added or removed, respectively.
*/
static void
adjust_file_lookup (GtkFileSystemModel *model, guint id, int increment)
{
GHashTableIter iter;
gpointer key;
gpointer value;
g_hash_table_iter_init (&iter, model->file_lookup);
while (g_hash_table_iter_next (&iter, &key, &value))
{
guint index = GPOINTER_TO_UINT (value);
if (index >= id)
{
index += increment;
g_hash_table_iter_replace (&iter, GUINT_TO_POINTER (index));
}
}
}
/**
* add_file:
* @model: the model
* @file: the file to add
* @info: the information to associate with the file
*
* Adds the given @file with its associated @info to the @model.
* If the model is frozen, the file will only show up after it is thawn.
**/
static void
add_file (GtkFileSystemModel *model,
GFile *file,
GFileInfo *info)
{
FileModelNode *node;
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (G_IS_FILE_INFO (info));
node = g_slice_alloc0 (model->node_size);
node->file = g_object_ref (file);
if (info)
node->info = g_object_ref (info);
node->frozen_add = model->frozen ? TRUE : FALSE;
g_array_append_vals (model->files, node, 1);
g_slice_free1 (model->node_size, node);
if (!model->frozen)
node_compute_visibility_and_filters (model, model->files->len -1);
gtk_file_system_model_sort_node (model, model->files->len -1);
}
/**
* remove_file:
* @model: the model
* @file: file to remove from the model. The file must have been
* added to the model previously
*
* Removes the given file from the model. If the file is not part of
* @model, this function does nothing.
**/
static void
remove_file (GtkFileSystemModel *model,
GFile *file)
{
FileModelNode *node;
guint id;
guint row;
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (G_IS_FILE (file));
id = node_get_for_file (model, file);
if (id == 0)
return;
node = get_node (model, id);
row = node_get_tree_row (model, id);
node_invalidate_index (model, id);
g_hash_table_remove (model->file_lookup, file);
g_object_unref (node->file);
adjust_file_lookup (model, id, -1);
if (node->info)
g_object_unref (node->info);
g_array_remove_index (model->files, id);
/* We don't need to resort, as removing a row doesn't change the sorting order of the other rows */
emit_row_deleted_for_row (model, row);
}
/**
* _gtk_file_system_model_update_file:
* @model: the model
* @file: the file
* @info: the new file info
*
* Tells the file system model that the file changed and that the
* new @info should be used for it now. If the file is not part of
* @model, it will get added automatically.
**/
void
_gtk_file_system_model_update_file (GtkFileSystemModel *model,
GFile *file,
GFileInfo *info)
{
FileModelNode *node;
guint i, id;
GFileInfo *old_info;
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (G_IS_FILE_INFO (info));
id = node_get_for_file (model, file);
if (id == 0)
{
add_file (model, file, info);
id = node_get_for_file (model, file);
}
node = get_node (model, id);
old_info = node->info;
node->info = g_object_ref (info);
if (old_info)
g_object_unref (old_info);
for (i = 0; i < model->n_columns; i++)
{
if (G_VALUE_TYPE (&node->values[i]))
g_value_unset (&node->values[i]);
}
if (node->visible)
emit_row_changed_for_node (model, id);
}
/**
* _gtk_file_system_model_set_filter:
* @mode: a #GtkFileSystemModel
* @filter: (allow-none): %NULL or filter to use
*
* Sets a filter to be used for deciding if a row should be visible or not.
* Whether this filter applies to directories can be toggled with
* _gtk_file_system_model_set_filter_folders().
**/
void
_gtk_file_system_model_set_filter (GtkFileSystemModel *model,
GtkFileFilter * filter)
{
GtkFileFilter *old_filter;
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (filter == NULL || GTK_IS_FILE_FILTER (filter));
if (filter)
g_object_ref (filter);
old_filter = model->filter;
model->filter = filter;
if (old_filter)
g_object_unref (old_filter);
gtk_file_system_model_refilter_all (model);
}
/**
* _gtk_file_system_model_add_editable:
* @model: a #GtkFileSystemModel
* @iter: Location to return the iter corresponding to the editable row
*
* Adds an “empty” row at the beginning of the model. This does not refer to
* any file, but is a temporary placeholder for a file name that the user will
* type when a corresponding cell is made editable. When your code is done
* using this temporary row, call _gtk_file_system_model_remove_editable().
**/
void
_gtk_file_system_model_add_editable (GtkFileSystemModel *model, GtkTreeIter *iter)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (!get_node (model, 0)->visible);
node_set_visible_and_filtered_out (model, 0, TRUE, FALSE);
ITER_INIT_FROM_INDEX (model, iter, 0);
}
/**
* _gtk_file_system_model_remove_editable:
* @model: a #GtkFileSystemModel
*
* Removes the “empty” row at the beginning of the model that was
* created with _gtk_file_system_model_add_editable(). You should call
* this function when your code is finished editing this temporary row.
**/
void
_gtk_file_system_model_remove_editable (GtkFileSystemModel *model)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (get_node (model, 0)->visible);
node_set_visible_and_filtered_out (model, 0, FALSE, FALSE);
}
/**
* freeze_updates:
* @model: a #GtkFileSystemModel
*
* Freezes most updates on the model, so that performing multiple operations on
* the files in the model do not cause any events. Use thaw_updates() to resume
* proper operations. It is fine to call this function multiple times as long as
* freeze and thaw calls are balanced.
**/
static void
freeze_updates (GtkFileSystemModel *model)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
model->frozen++;
}
/**
* thaw_updates:
* @model: a #GtkFileSystemModel
*
* Undoes the effect of a previous call to freeze_updates()
**/
static void
thaw_updates (GtkFileSystemModel *model)
{
gboolean stuff_added;
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (model->frozen > 0);
model->frozen--;
if (model->frozen > 0)
return;
stuff_added = get_node (model, model->files->len - 1)->frozen_add;
if (model->filter_on_thaw)
gtk_file_system_model_refilter_all (model);
if (model->sort_on_thaw)
gtk_file_system_model_sort (model);
if (stuff_added)
{
guint i;
for (i = 0; i < model->files->len; i++)
{
FileModelNode *node = get_node (model, i);
if (!node->frozen_add)
continue;
node->frozen_add = FALSE;
node_compute_visibility_and_filters (model, i);
}
}
}
/**
* _gtk_file_system_model_clear_cache:
* @model: a #GtkFileSystemModel
* @column: the column to clear or -1 for all columns
*
* Clears the cached values in the model for the given @column. Use
* this function whenever your get_value function would return different
* values for a column.
* The file chooser uses this for example when the icon theme changes to
* invalidate the cached pixbufs.
**/
void
_gtk_file_system_model_clear_cache (GtkFileSystemModel *model,
int column)
{
guint i;
int start, end;
gboolean changed;
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (column >= -1 && (guint) column < model->n_columns);
if (column > -1)
{
start = column;
end = column + 1;
}
else
{
start = 0;
end = model->n_columns;
}
for (i = 0; i < model->files->len; i++)
{
FileModelNode *node = get_node (model, i);
changed = FALSE;
for (column = start; column < end; column++)
{
if (!G_VALUE_TYPE (&node->values[column]))
continue;
g_value_unset (&node->values[column]);
changed = TRUE;
}
if (changed && node->visible)
emit_row_changed_for_node (model, i);
}
/* FIXME: resort? */
}
/**
* _gtk_file_system_model_add_and_query_file:
* @model: a #GtkFileSystemModel
* @file: the file to add
* @attributes: attributes to query before adding the file
*
* This is a conenience function that calls g_file_query_info_async() on
* the given file, and when successful, adds it to the model.
* Upon failure, the @file is discarded.
**/
void
_gtk_file_system_model_add_and_query_file (GtkFileSystemModel *model,
GFile * file,
const char * attributes)
{
g_return_if_fail (GTK_IS_FILE_SYSTEM_MODEL (model));
g_return_if_fail (G_IS_FILE (file));
g_return_if_fail (attributes != NULL);
g_file_query_info_async (file,
attributes,
G_FILE_QUERY_INFO_NONE,
IO_PRIORITY,
model->cancellable,
gtk_file_system_model_query_done,
model);
}
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