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[PATCH 1/4] gui: New type PsppireEmptyListStore.


From: Ben Pfaff
Subject: [PATCH 1/4] gui: New type PsppireEmptyListStore.
Date: Fri, 20 Apr 2012 22:11:52 -0700

PsppireEmptyListStore is an GtkTreeModel implementation that has a
client-specified number of rows and zero columns.  It is a useful model for
GtkTreeView or PsppSheetView when the client can easily synthesize cell
data using a callback set with gtk_tree_view_column_set_cell_data_func().
In that situation, GtkListStore can be wasteful (because it uses a lot of
memory to store what does not need to be stored) and situation-specific
custom models require additional boilerplate.

This commit also modified the text data import dialog code to use
PsppireEmptyListStore.  Future commits will add other users.
---
 src/ui/gui/automake.mk                |    2 +
 src/ui/gui/psppire-empty-list-store.c |  369 +++++++++++++++++++++++++++++++++
 src/ui/gui/psppire-empty-list-store.h |   68 ++++++
 src/ui/gui/text-data-import-dialog.c  |  348 +++++--------------------------
 4 files changed, 491 insertions(+), 296 deletions(-)
 create mode 100644 src/ui/gui/psppire-empty-list-store.c
 create mode 100644 src/ui/gui/psppire-empty-list-store.h

diff --git a/src/ui/gui/automake.mk b/src/ui/gui/automake.mk
index 75ca28a..4b26278 100644
--- a/src/ui/gui/automake.mk
+++ b/src/ui/gui/automake.mk
@@ -232,6 +232,8 @@ src_ui_gui_psppire_SOURCES = \
        src/ui/gui/psppire-dict.h \
        src/ui/gui/psppire-dictview.c \
        src/ui/gui/psppire-dictview.h \
+       src/ui/gui/psppire-empty-list-store.c \
+       src/ui/gui/psppire-empty-list-store.h \
        src/ui/gui/psppire-encoding-selector.c \
        src/ui/gui/psppire-encoding-selector.h \
        src/ui/gui/psppire-hbuttonbox.h \
diff --git a/src/ui/gui/psppire-empty-list-store.c 
b/src/ui/gui/psppire-empty-list-store.c
new file mode 100644
index 0000000..b7bc569
--- /dev/null
+++ b/src/ui/gui/psppire-empty-list-store.c
@@ -0,0 +1,369 @@
+/* PSPPIRE - a graphical user interface for PSPP.
+   Copyright (C) 2011, 2012 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include "psppire-empty-list-store.h"
+
+static void psppire_empty_list_store_class_init (PsppireEmptyListStoreClass *);
+static void psppire_empty_list_store_init (PsppireEmptyListStore *);
+
+/* GtkTreeModel interface. */
+static void gtk_tree_model_interface_init (GtkTreeModelIface *iface);
+static GtkTreeModelFlags empty_list_store_get_flags (GtkTreeModel *tree_model);
+static gint empty_list_store_get_n_columns (GtkTreeModel *tree_model);
+static GType empty_list_store_get_column_type (GtkTreeModel *tree_model,
+                                               gint          index_);
+static gboolean empty_list_store_get_iter (GtkTreeModel *tree_model,
+                                           GtkTreeIter  *iter,
+                                           GtkTreePath  *path);
+static GtkTreePath * empty_list_store_get_path (GtkTreeModel *tree_model,
+                                                GtkTreeIter  *iter);
+static void empty_list_store_get_value (GtkTreeModel *tree_model,
+                                        GtkTreeIter  *iter,
+                                        gint          column,
+                                        GValue       *value);
+static gboolean empty_list_store_iter_next (GtkTreeModel *tree_model,
+                                            GtkTreeIter  *iter);
+static gboolean empty_list_store_iter_children (GtkTreeModel *tree_model,
+                                                GtkTreeIter  *iter,
+                                                GtkTreeIter  *parent);
+static gboolean empty_list_store_iter_has_child (GtkTreeModel *tree_model,
+                                                 GtkTreeIter  *iter);
+static gint empty_list_store_iter_n_children (GtkTreeModel *tree_model,
+                                              GtkTreeIter  *iter);
+static gboolean empty_list_store_iter_nth_child (GtkTreeModel *tree_model,
+                                                 GtkTreeIter  *iter,
+                                                 GtkTreeIter  *parent,
+                                                 gint          n);
+static gboolean empty_list_store_iter_parent (GtkTreeModel *tree_model,
+                                              GtkTreeIter  *iter,
+                                              GtkTreeIter  *child);
+
+GType
+psppire_empty_list_store_get_type (void)
+{
+  static GType type = 0;
+  if (!type)
+    {
+      static const GTypeInfo psppire_empty_list_store_info =
+        {
+          sizeof(PsppireEmptyListStoreClass),
+          NULL,    /* base init */
+          NULL,    /* base finalize */
+          (GClassInitFunc) psppire_empty_list_store_class_init,
+          NULL,    /* class finalize */
+          NULL,    /* class data */
+          sizeof(PsppireEmptyListStore),
+          0,    /* n_preallocs, ignored since 2.10 */
+          (GInstanceInitFunc) psppire_empty_list_store_init,
+          NULL
+        };
+      static const GInterfaceInfo gtk_tree_model_info =
+        {
+          (GInterfaceInitFunc) gtk_tree_model_interface_init,
+          (GInterfaceFinalizeFunc) NULL,
+          NULL
+        };
+      type = g_type_register_static (G_TYPE_OBJECT,
+                                 "PsppireEmptyListStore",
+                                 &psppire_empty_list_store_info, 0);
+      g_type_add_interface_static (type, GTK_TYPE_TREE_MODEL,
+                                   &gtk_tree_model_info);
+    }
+  return type;
+}
+
+enum
+  {
+    PROP_0,
+    PROP_N_ROWS
+  };
+
+static void
+psppire_empty_list_store_set_property (GObject      *object,
+                                       guint         prop_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  PsppireEmptyListStore *obj = PSPPIRE_EMPTY_LIST_STORE (object);
+
+  switch (prop_id)
+    {
+    case PROP_N_ROWS:
+      obj->n_rows = g_value_get_int (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+psppire_empty_list_store_get_property (GObject      *object,
+                                       guint         prop_id,
+                                       GValue       *value,
+                                       GParamSpec   *pspec)
+{
+  PsppireEmptyListStore *obj = PSPPIRE_EMPTY_LIST_STORE (object);
+
+  switch (prop_id)
+    {
+    case PROP_N_ROWS:
+      g_value_set_int (value, obj->n_rows);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+psppire_empty_list_store_class_init (PsppireEmptyListStoreClass *class)
+{
+  GObjectClass *gobject_class;
+  gobject_class = G_OBJECT_CLASS (class);
+
+  gobject_class->set_property = psppire_empty_list_store_set_property;
+  gobject_class->get_property = psppire_empty_list_store_get_property;
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_N_ROWS,
+                                   g_param_spec_int ("n-rows",
+                                                    ("Number of rows"),
+                                                    ("Number of rows in 
GtkTreeModel"),
+                                                    0,
+                                                    G_MAXINT,
+                                                    0,
+                                                    G_PARAM_READWRITE));
+}
+
+static void
+psppire_empty_list_store_init (PsppireEmptyListStore *obj)
+{
+  obj->n_rows = 0;
+}
+
+PsppireEmptyListStore *
+psppire_empty_list_store_new (gint n_rows)
+{
+  return PSPPIRE_EMPTY_LIST_STORE (g_object_new (PSPPIRE_TYPE_EMPTY_LIST_STORE,
+                                                 "n-rows", n_rows,
+                                                 NULL));
+}
+
+gint
+psppire_empty_list_store_get_n_rows (const PsppireEmptyListStore *obj)
+{
+  return obj->n_rows;
+}
+
+void
+psppire_empty_list_store_set_n_rows (PsppireEmptyListStore *obj,
+                                     gint n_rows)
+{
+  obj->n_rows = n_rows;
+}
+
+void
+psppire_empty_list_store_row_inserted (PsppireEmptyListStore *obj,
+                                       gint row)
+{
+  GtkTreeModel *tree_model = GTK_TREE_MODEL (obj);
+  GtkTreeIter iter;
+  GtkTreePath *path;
+
+  path = gtk_tree_path_new_from_indices (row, -1);
+  gtk_tree_model_get_iter (tree_model, &iter, path);
+  gtk_tree_model_row_inserted (tree_model, path, &iter);
+  gtk_tree_path_free (path);
+}
+
+void
+psppire_empty_list_store_row_deleted (PsppireEmptyListStore *obj,
+                                      gint row)
+{
+  GtkTreeModel *tree_model = GTK_TREE_MODEL (obj);
+  GtkTreePath *path;
+
+  path = gtk_tree_path_new_from_indices (row, -1);
+  gtk_tree_model_row_deleted (tree_model, path);
+  gtk_tree_path_free (path);
+}
+
+/* GtkTreeModel interface. */
+
+/* Random number used in 'stamp' member of GtkTreeIter. */
+#define TREE_MODEL_STAMP 0x10c44c13
+
+static gboolean
+empty_list_store_init_iter (GtkTreeModel *model, gint idx, GtkTreeIter *iter)
+{
+  const PsppireEmptyListStore *store = PSPPIRE_EMPTY_LIST_STORE (model);
+
+  if (idx < 0 || idx >= store->n_rows)
+    {
+      iter->stamp = 0;
+      iter->user_data = GINT_TO_POINTER (-1);
+      return FALSE;
+    }
+  else
+    {
+      iter->stamp = TREE_MODEL_STAMP;
+      iter->user_data = GINT_TO_POINTER (idx);
+      return TRUE;
+    }
+}
+
+static void
+gtk_tree_model_interface_init (GtkTreeModelIface *iface)
+{
+  g_return_if_fail (iface != NULL);
+
+  iface->get_flags = empty_list_store_get_flags;
+  iface->get_n_columns = empty_list_store_get_n_columns;
+  iface->get_column_type = empty_list_store_get_column_type;
+  iface->get_iter = empty_list_store_get_iter;
+  iface->get_path = empty_list_store_get_path;
+  iface->get_value = empty_list_store_get_value;
+  iface->iter_next = empty_list_store_iter_next;
+  iface->iter_children = empty_list_store_iter_children;
+  iface->iter_has_child = empty_list_store_iter_has_child;
+  iface->iter_n_children = empty_list_store_iter_n_children;
+  iface->iter_nth_child = empty_list_store_iter_nth_child;
+  iface->iter_parent = empty_list_store_iter_parent;
+}
+
+static GtkTreeModelFlags
+empty_list_store_get_flags (GtkTreeModel *tree_model G_GNUC_UNUSED)
+{
+  return GTK_TREE_MODEL_LIST_ONLY;
+}
+
+static gint
+empty_list_store_get_n_columns (GtkTreeModel *tree_model G_GNUC_UNUSED)
+{
+  return 0;
+}
+
+static GType
+empty_list_store_get_column_type (GtkTreeModel *tree_model,
+                                  gint          index_)
+{
+  g_return_val_if_reached (G_TYPE_NONE);
+}
+
+static gboolean
+empty_list_store_get_iter (GtkTreeModel *tree_model,
+                           GtkTreeIter  *iter,
+                           GtkTreePath  *path)
+{
+  gint *indices, depth;
+
+  g_return_val_if_fail (path, FALSE);
+
+  indices = gtk_tree_path_get_indices (path);
+  depth = gtk_tree_path_get_depth (path);
+
+  g_return_val_if_fail (depth == 1, FALSE);
+
+  return empty_list_store_init_iter (tree_model, indices[0], iter);
+}
+
+static GtkTreePath *
+empty_list_store_get_path (GtkTreeModel *tree_model,
+                           GtkTreeIter  *iter)
+{
+  GtkTreePath *path;
+
+  g_return_val_if_fail (iter->stamp == TREE_MODEL_STAMP, FALSE);
+
+  path = gtk_tree_path_new ();
+  gtk_tree_path_append_index (path, GPOINTER_TO_INT (iter->user_data));
+
+  return path;
+}
+
+static void
+empty_list_store_get_value (GtkTreeModel *tree_model,
+                            GtkTreeIter  *iter,
+                            gint          column,
+                            GValue       *value)
+{
+  g_return_if_reached ();
+}
+
+static gboolean
+empty_list_store_iter_next (GtkTreeModel *tree_model,
+                            GtkTreeIter  *iter)
+{
+  gint idx;
+
+  g_return_val_if_fail (iter->stamp == TREE_MODEL_STAMP, FALSE);
+
+  idx = GPOINTER_TO_INT (iter->user_data);
+  return empty_list_store_init_iter (tree_model, idx + (idx >= 0), iter);
+}
+
+static gboolean
+empty_list_store_iter_children (GtkTreeModel *tree_model,
+                                GtkTreeIter  *iter,
+                                GtkTreeIter  *parent)
+{
+  return FALSE;
+}
+
+static gboolean
+empty_list_store_iter_has_child (GtkTreeModel *tree_model,
+                                 GtkTreeIter  *iter)
+{
+  return FALSE;
+}
+
+static gint
+empty_list_store_iter_n_children (GtkTreeModel *tree_model,
+                                  GtkTreeIter  *iter)
+{
+  return iter == NULL ? PSPPIRE_EMPTY_LIST_STORE (tree_model)->n_rows : 0;
+}
+
+static gboolean
+empty_list_store_iter_nth_child (GtkTreeModel *tree_model,
+                                 GtkTreeIter  *iter,
+                                 GtkTreeIter  *parent,
+                                 gint          n)
+{
+  g_return_val_if_fail (parent == NULL, FALSE);
+
+  return empty_list_store_init_iter (tree_model, n, iter);
+}
+
+static gboolean
+empty_list_store_iter_parent (GtkTreeModel *tree_model,
+                              GtkTreeIter  *iter,
+                              GtkTreeIter  *child)
+{
+  return FALSE;
+}
+
+gint
+empty_list_store_iter_to_row (const GtkTreeIter *iter)
+{
+  g_return_val_if_fail (iter->stamp == TREE_MODEL_STAMP, 0);
+  return GPOINTER_TO_INT (iter->user_data);
+}
diff --git a/src/ui/gui/psppire-empty-list-store.h 
b/src/ui/gui/psppire-empty-list-store.h
new file mode 100644
index 0000000..ae6d36c
--- /dev/null
+++ b/src/ui/gui/psppire-empty-list-store.h
@@ -0,0 +1,68 @@
+/* PSPPIRE - a graphical user interface for PSPP.
+   Copyright (C) 2011, 2012 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef PSPPIRE_EMPTY_LIST_STORE_H
+#define PSPPIRE_EMPTY_LIST_STORE_H 1
+
+/* PsppireEmptyListStore is an GtkTreeModel implementation that has a
+   client-specified number of rows and zero columns.  It is a useful model for
+   GtkTreeView or PsppSheetView when the client can easily synthesize cell data
+   using a callback set with gtk_tree_view_column_set_cell_data_func().  In
+   that situation, GtkListStore can be wasteful (because it uses a lot of
+   memory to store what does not need to be stored) and situation-specific
+   custom models require additional boilerplate. */
+
+#include <glib-object.h>
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define PSPPIRE_TYPE_EMPTY_LIST_STORE             
(psppire_empty_list_store_get_type())
+#define PSPPIRE_EMPTY_LIST_STORE(obj)             (G_TYPE_CHECK_INSTANCE_CAST 
((obj),PSPPIRE_TYPE_EMPTY_LIST_STORE,PsppireEmptyListStore))
+#define PSPPIRE_EMPTY_LIST_STORE_CLASS(class)     (G_TYPE_CHECK_CLASS_CAST 
((class),PSPPIRE_TYPE_EMPTY_LIST_STORE,PsppireEmptyListStoreClass))
+#define PSPPIRE_IS_EMPTY_LIST_STORE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE 
((obj),PSPPIRE_TYPE_EMPTY_LIST_STORE))
+#define PSPPIRE_IS_EMPTY_LIST_STORE_CLASS(class)  (G_TYPE_CHECK_CLASS_TYPE 
((class),PSPPIRE_TYPE_EMPTY_LIST_STORE))
+#define PSPPIRE_EMPTY_LIST_STORE_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS 
((obj),PSPPIRE_TYPE_EMPTY_LIST_STORE,PsppireEmptyListStoreClass))
+
+typedef struct _PsppireEmptyListStore      PsppireEmptyListStore;
+typedef struct _PsppireEmptyListStoreClass PsppireEmptyListStoreClass;
+
+struct _PsppireEmptyListStore {
+  GObject parent;
+  gint n_rows;
+};
+
+struct _PsppireEmptyListStoreClass {
+  GObjectClass parent_class;
+};
+
+GType psppire_empty_list_store_get_type (void) G_GNUC_CONST;
+PsppireEmptyListStore* psppire_empty_list_store_new (gint n_rows);
+
+gint psppire_empty_list_store_get_n_rows (const PsppireEmptyListStore *);
+void psppire_empty_list_store_set_n_rows (PsppireEmptyListStore *,
+                                          gint n_rows);
+
+void psppire_empty_list_store_row_inserted (PsppireEmptyListStore *,
+                                            gint row);
+void psppire_empty_list_store_row_deleted (PsppireEmptyListStore *,
+                                           gint row);
+
+gint empty_list_store_iter_to_row (const GtkTreeIter *);
+
+G_END_DECLS
+
+#endif /* PSPPIRE_EMPTY_LIST_STORE_H */
diff --git a/src/ui/gui/text-data-import-dialog.c 
b/src/ui/gui/text-data-import-dialog.c
index 7c9603d..10dc626 100644
--- a/src/ui/gui/text-data-import-dialog.c
+++ b/src/ui/gui/text-data-import-dialog.c
@@ -41,33 +41,20 @@
 #include "ui/gui/builder-wrapper.h"
 #include "ui/gui/psppire-data-window.h"
 #include "ui/gui/psppire-dialog.h"
+#include "ui/gui/psppire-empty-list-store.h"
 #include "ui/gui/psppire-var-sheet.h"
 #include "ui/gui/psppire-var-store.h"
 #include "ui/gui/psppire-scanf.h"
 #include "ui/syntax-gen.h"
 
 #include "gl/error.h"
+#include "gl/intprops.h"
 #include "gl/xalloc.h"
 
 #include "gettext.h"
 #define _(msgid) gettext (msgid)
 #define N_(msgid) msgid
 
-
-/* TextImportModel, a GtkTreeModel used by the text data import
-   dialog. */
-enum
-  {
-    TEXT_IMPORT_MODEL_COLUMN_LINE_NUMBER, /* 1-based line number in file */
-    TEXT_IMPORT_MODEL_COLUMN_LINE,        /* The line from the file. */
-  };
-typedef struct TextImportModel TextImportModel;
-typedef struct TextImportModelClass TextImportModelClass;
-
-TextImportModel *text_import_model_new (struct string *lines, size_t line_cnt,
-                                        size_t first_line);
-gint text_import_model_iter_to_row (const GtkTreeIter *);
-
 struct import_assistant;
 
 /* The file to be imported. */
@@ -898,6 +885,23 @@ reset_first_line_page (struct import_assistant *ia)
   set_first_line (ia);
 }
 
+static void
+render_line (GtkTreeViewColumn *tree_column,
+             GtkCellRenderer *cell,
+             GtkTreeModel *tree_model,
+             GtkTreeIter *iter,
+             gpointer data)
+{
+  gint row = empty_list_store_iter_to_row (iter);
+  struct string *lines;
+
+  lines = g_object_get_data (G_OBJECT (tree_model), "lines");
+  g_return_if_fail (lines != NULL);
+
+  g_object_set (cell, "text", ds_cstr (&lines[row]), NULL);
+}
+
+
 /* Creates and returns a tree view that contains each of the
    lines in IA's file as a row. */
 static GtkTreeView *
@@ -912,12 +916,10 @@ create_lines_tree_view (GtkContainer *parent, struct 
import_assistant *ia)
 
   make_tree_view (ia, 0, &tree_view);
 
-  column = gtk_tree_view_column_new_with_attributes 
-    (
-     title, ia->asst.fixed_renderer,
-     "text", TEXT_IMPORT_MODEL_COLUMN_LINE,
-     (void *) NULL
-     );
+  column = gtk_tree_view_column_new_with_attributes (
+     title, ia->asst.fixed_renderer, (void *) NULL);
+  gtk_tree_view_column_set_cell_data_func (column, ia->asst.fixed_renderer,
+                                           render_line, NULL, NULL);
   gtk_tree_view_column_set_sizing (column, GTK_TREE_VIEW_COLUMN_FIXED);
 
   max_line_length = 0;
@@ -1537,7 +1539,7 @@ render_input_cell (GtkTreeViewColumn *tree_column, 
GtkCellRenderer *cell,
 
   column = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_column),
                                                "column-number"));
-  row = text_import_model_iter_to_row (iter) + ia->first_line.skip_lines;
+  row = empty_list_store_iter_to_row (iter) + ia->first_line.skip_lines;
   field = ia->separators.columns[column].contents[row];
   if (field.string != NULL)
     {
@@ -1851,7 +1853,7 @@ render_output_cell (GtkTreeViewColumn *tree_column,
   bool ok;
 
   ok = parse_field (ia,
-                    (text_import_model_iter_to_row (iter)
+                    (empty_list_store_iter_to_row (iter)
                      + ia->first_line.skip_lines),
                     GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_column),
                                                         "column-number")),
@@ -1935,7 +1937,7 @@ get_tooltip_location (GtkWidget *widget, gint wx, gint wy,
   if (!ok)
     return FALSE;
 
-  *row = text_import_model_iter_to_row (&iter) + ia->first_line.skip_lines;
+  *row = empty_list_store_iter_to_row (&iter) + ia->first_line.skip_lines;
   return TRUE;
 }
 
@@ -1947,27 +1949,47 @@ make_tree_view (const struct import_assistant *ia,
   GtkTreeModel *model;
 
   *tree_view = GTK_TREE_VIEW (gtk_tree_view_new ());
-  model = GTK_TREE_MODEL (text_import_model_new (
-                            ia->file.lines + first_line,
-                            ia->file.line_cnt - first_line, first_line));
+  model = GTK_TREE_MODEL (psppire_empty_list_store_new (
+                            ia->file.line_cnt - first_line));
+  g_object_set_data (G_OBJECT (model), "lines", ia->file.lines + first_line);
+  g_object_set_data (G_OBJECT (model), "first-line",
+                     GINT_TO_POINTER (first_line));
   gtk_tree_view_set_model (*tree_view, model);
 
   add_line_number_column (ia, *tree_view);
 }
 
 static void
+render_line_number (GtkTreeViewColumn *tree_column,
+                    GtkCellRenderer *cell,
+                    GtkTreeModel *tree_model,
+                    GtkTreeIter *iter,
+                    gpointer data)
+{
+  gint row = empty_list_store_iter_to_row (iter);
+  char s[INT_BUFSIZE_BOUND (int)];
+  int first_line;
+
+  first_line = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (tree_model),
+                                                   "first-line"));
+  sprintf (s, "%d", first_line + row);
+  g_object_set (cell, "text", s, NULL);
+}
+
+static void
 add_line_number_column (const struct import_assistant *ia,
                         GtkTreeView *treeview)
 {
   GtkTreeViewColumn *column;
 
   column = gtk_tree_view_column_new_with_attributes (
-                                                    _("Line"), 
ia->asst.prop_renderer,
-    "text", TEXT_IMPORT_MODEL_COLUMN_LINE_NUMBER,
-    (void *) NULL);
+    _("Line"), ia->asst.prop_renderer, (void *) NULL);
   gtk_tree_view_column_set_sizing (column, GTK_TREE_VIEW_COLUMN_FIXED);
   gtk_tree_view_column_set_fixed_width (
     column, get_monospace_width (treeview, ia->asst.prop_renderer, 5));
+  gtk_tree_view_column_set_resizable (column, TRUE);
+  gtk_tree_view_column_set_cell_data_func (column, ia->asst.prop_renderer,
+                                           render_line_number, NULL, NULL);
   gtk_tree_view_append_column (treeview, column);
 }
 
@@ -2083,272 +2105,6 @@ escape_underscores (const char *in)
 
   return out;
 }
-
-/* TextImportModel, a GtkTreeModel implementation used by some
-   pages of the assistant. */
-
-#define G_TYPE_TEXT_IMPORT_MODEL (text_import_model_get_type ())
-#define TEXT_IMPORT_MODEL(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), 
G_TYPE_TEXT_IMPORT_MODEL, TextImportModel))
-#define TEXT_IMPORT_MODEL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), 
G_TYPE_TEXT_IMPORT_MODEL, TextImportModelClass))
-#define IS_TEXT_IMPORT_MODEL(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), 
G_TYPE_TEXT_IMPORT_MODEL))
-#define IS_TEXT_IMPORT_MODEL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), 
G_TYPE_TEXT_IMPORT_MODEL))
-#define TEXT_IMPORT_MODEL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), 
G_TYPE_TEXT_IMPORT_MODEL, TextImportModelClass))
-
-/* Random number used in 'stamp' member of GtkTreeIter. */
-#define TREE_MODEL_STAMP 0x7efd67d3
-
-struct TextImportModel
-{
-  GObject             parent;
-  struct string *lines;
-  size_t line_cnt;
-  size_t first_line;
-};
-
-struct TextImportModelClass
-{
-  GObjectClass parent_class;
-};
-
-GType text_import_model_get_type (void);
-static void text_import_model_tree_model_init (gpointer iface, gpointer data);
-
-GType
-text_import_model_get_type (void)
-{
-  static GType object_type = 0;
-
-  if (!object_type)
-    {
-      static const GTypeInfo object_info = {
-       sizeof (TextImportModelClass),
-       (GBaseInitFunc) NULL,
-       (GBaseFinalizeFunc) NULL,
-       NULL,   /* class_init */
-       NULL,   /* class_finalize */
-       NULL,   /* class_data */
-       sizeof (TextImportModel),
-       0,      /* n_preallocs */
-       NULL,   /* instance_init */
-      };
-
-      static const GInterfaceInfo tree_model_info = {
-       text_import_model_tree_model_init,
-       NULL,
-       NULL
-      };
-
-      object_type = g_type_register_static (G_TYPE_OBJECT,
-                                           "TextImportModel",
-                                           &object_info, 0);
-
-      g_type_add_interface_static (object_type, GTK_TYPE_TREE_MODEL,
-                                  &tree_model_info);
-
-
-    }
-
-  return object_type;
-}
-
-
-/* Creates and returns a new TextImportModel that contains the
-   LINE_CNT lines in LINES.  The lines before FIRST_LINE in LINES
-   are not part of the model, but they are included in the line
-   numbers in the TEXT_IMPORT_MODEL_COLUMN_LINE_NUMBER column.
-
-   The caller retains responsibility for freeing LINES and must
-   ensure that its lifetime and that of the strings that it
-   contains exceeds that of the TextImportModel. */
-TextImportModel *
-text_import_model_new (struct string *lines, size_t line_cnt,
-                       size_t first_line)
-{
-  TextImportModel *new_text_import_model
-    = g_object_new (G_TYPE_TEXT_IMPORT_MODEL, NULL);
-  new_text_import_model->lines = lines;
-  new_text_import_model->line_cnt = line_cnt;
-  new_text_import_model->first_line = first_line;
-  return new_text_import_model;
-}
-
-
-static gboolean
-tree_model_iter_has_child  (GtkTreeModel *tree_model,
-                           GtkTreeIter  *iter)
-{
-  return FALSE;
-}
-
-static gboolean
-tree_model_iter_parent (GtkTreeModel *tree_model,
-                       GtkTreeIter *iter,
-                       GtkTreeIter *child)
-{
-  return TRUE;
-}
-
-static GtkTreeModelFlags
-tree_model_get_flags (GtkTreeModel *model)
-{
-  g_return_val_if_fail (IS_TEXT_IMPORT_MODEL (model), (GtkTreeModelFlags) 0);
-
-  return GTK_TREE_MODEL_LIST_ONLY | GTK_TREE_MODEL_ITERS_PERSIST;
-}
-
-
-static gint
-tree_model_n_columns (GtkTreeModel *model)
-{
-  return 2;
-}
-
-static GType
-tree_model_column_type (GtkTreeModel *model, gint index)
-{
-  return (index == TEXT_IMPORT_MODEL_COLUMN_LINE_NUMBER ? G_TYPE_INT
-          : index == TEXT_IMPORT_MODEL_COLUMN_LINE ? G_TYPE_STRING
-          : -1);
-}
-
-static gboolean
-init_iter (TextImportModel *list, gint idx, GtkTreeIter *iter)
-{
-  if (idx < 0 || idx >= list->line_cnt)
-    {
-      iter->stamp = 0;
-      iter->user_data = GINT_TO_POINTER (-1);
-      return FALSE;
-    }
-  else
-    {
-      iter->stamp = TREE_MODEL_STAMP;
-      iter->user_data = GINT_TO_POINTER (idx);
-      return TRUE;
-    }
-}
-
-static gboolean
-tree_model_get_iter (GtkTreeModel *model, GtkTreeIter *iter, GtkTreePath *path)
-{
-  gint *indices, depth;
-
-  TextImportModel *list = TEXT_IMPORT_MODEL (model);
-
-  g_return_val_if_fail (path, FALSE);
-
-  indices = gtk_tree_path_get_indices (path);
-  depth = gtk_tree_path_get_depth (path);
-
-  g_return_val_if_fail (depth == 1, FALSE);
-
-  return init_iter (list, indices[0], iter);
-}
-
-
-static gboolean
-tree_model_iter_next (GtkTreeModel *model, GtkTreeIter *iter)
-{
-  TextImportModel *list = TEXT_IMPORT_MODEL (model);
-  gint idx;
-
-  assert (iter->stamp == TREE_MODEL_STAMP);
-
-  idx = GPOINTER_TO_INT (iter->user_data);
-  return init_iter (list, idx == -1 ? -1 : idx + 1, iter);
-}
-
-static GtkTreePath *
-tree_model_get_path (GtkTreeModel *model, GtkTreeIter *iter)
-{
-  GtkTreePath *path;
-
-  g_return_val_if_fail (iter->stamp == TREE_MODEL_STAMP, FALSE);
-
-  path = gtk_tree_path_new ();
-  gtk_tree_path_append_index (path, GPOINTER_TO_INT (iter->user_data));
-
-  return path;
-}
-
-static void
-tree_model_get_value (GtkTreeModel *model, GtkTreeIter *iter,
-                     gint column, GValue *value)
-{
-  TextImportModel *list = TEXT_IMPORT_MODEL (model);
-  gint idx;
-
-  g_return_if_fail (iter->stamp == TREE_MODEL_STAMP);
-
-  idx = GPOINTER_TO_INT (iter->user_data);
-  assert (idx >= 0 && idx < list->line_cnt);
-
-  if (column == 0)
-    {
-      g_value_init (value, G_TYPE_INT);
-      g_value_set_int (value, idx + list->first_line + 1);
-    }
-  else
-    {
-      g_value_init (value, G_TYPE_STRING);
-      g_value_set_static_string (value, ds_cstr (&list->lines[idx]));
-    }
-}
-
-static gboolean
-tree_model_iter_children (GtkTreeModel *tree_model,
-                         GtkTreeIter *iter,
-                         GtkTreeIter *parent)
-{
-  return FALSE;
-}
-
-static gint
-tree_model_n_children (GtkTreeModel *model, GtkTreeIter  *iter)
-{
-  TextImportModel *list = TEXT_IMPORT_MODEL (model);
-
-  return iter == NULL ? list->line_cnt : 0;
-}
-
-static gboolean
-tree_model_nth_child (GtkTreeModel *model, GtkTreeIter *iter,
-                     GtkTreeIter *parent, gint n)
-{
-  TextImportModel *list = TEXT_IMPORT_MODEL (model);
-  g_return_val_if_fail (IS_TEXT_IMPORT_MODEL (model), FALSE);
-
-  if (parent)
-    return FALSE;
-  return init_iter (list, n, iter);
-}
-
-static void
-text_import_model_tree_model_init (gpointer iface_, gpointer data UNUSED)
-{
-  GtkTreeModelIface *iface = (GtkTreeModelIface *) iface_;
-
-  iface->get_flags = tree_model_get_flags;
-  iface->get_n_columns = tree_model_n_columns;
-  iface->get_column_type = tree_model_column_type;
-  iface->get_iter = tree_model_get_iter;
-  iface->iter_next = tree_model_iter_next;
-  iface->get_path = tree_model_get_path;
-  iface->get_value = tree_model_get_value;
-
-  iface->iter_children = tree_model_iter_children;
-  iface->iter_has_child = tree_model_iter_has_child;
-  iface->iter_n_children = tree_model_n_children;
-  iface->iter_nth_child = tree_model_nth_child;
-  iface->iter_parent = tree_model_iter_parent;
-}
-
-gint
-text_import_model_iter_to_row (const GtkTreeIter *iter)
-{
-  assert (iter->stamp == TREE_MODEL_STAMP);
-  return GPOINTER_TO_INT (iter->user_data);
-}
 
 /* Increments the "watch cursor" level, setting the cursor for
    the assistant window to a watch face to indicate to the user
-- 
1.7.2.5




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