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/**
* vimb - a webkit based vim like browser.
*
* Copyright (C) 2012-2016 Daniel Carl
*
* 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 "completion.h"
#include "config.h"
#include "main.h"
typedef struct {
GtkWidget *win, *tree;
int active; /* number of the current active tree item */
CompletionSelectFunc selfunc;
} Completion;
static gboolean tree_selection_func(GtkTreeSelection *selection,
GtkTreeModel *model, GtkTreePath *path, gboolean selected, gpointer data);
extern struct Vimb vb;
/**
* Stop the completion and reset temporary used data.
*/
void completion_clean(Client *c)
{
Completion *comp = (Completion*)c->comp;
c->mode->flags &= ~FLAG_COMPLETION;
if (comp->win) {
gtk_widget_destroy(comp->win);
comp->win = NULL;
comp->tree = NULL;
}
}
/**
* Free the memory of the completion set on the client.
*/
void completion_cleanup(Client *c)
{
if (c->comp) {
g_slice_free(Completion, c->comp);
c->comp = NULL;
}
}
/**
* Start the completion by creating the required widgets and setting a select
* function.
*/
gboolean completion_create(Client *c, GtkTreeModel *model,
CompletionSelectFunc selfunc, gboolean back)
{
GtkCellRenderer *renderer;
GtkTreeSelection *selection;
GtkTreeViewColumn *column;
GtkRequisition size;
GtkTreePath *path;
GtkTreeIter iter;
int height, width;
Completion *comp = (Completion*)c->comp;
/* if there is only one match - don't build the tree view */
if (gtk_tree_model_iter_n_children(model, NULL) == 1) {
char *value;
path = gtk_tree_path_new_from_indices(0, -1);
if (gtk_tree_model_get_iter(model, &iter, path)) {
gtk_tree_model_get(model, &iter, COMPLETION_STORE_FIRST, &value, -1);
/* call the select function */
selfunc(c, value);
g_free(value);
g_object_unref(model);
return FALSE;
}
}
comp->selfunc = selfunc;
/* prepare the tree view */
comp->win = gtk_scrolled_window_new(NULL, NULL);
comp->tree = gtk_tree_view_new();
GtkCssProvider* provider = gtk_css_provider_get_default();
gtk_css_provider_load_from_data(provider, GUI_STYLE, -1, NULL);
gtk_style_context_add_provider(gtk_widget_get_style_context(comp->tree),
GTK_STYLE_PROVIDER(provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
gtk_box_pack_end(GTK_BOX(gtk_widget_get_parent(GTK_WIDGET(c->statusbar.box))), comp->win, FALSE, FALSE, 0);
gtk_container_add(GTK_CONTAINER(comp->win), comp->tree);
gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(comp->tree), FALSE);
/* we have only on line per item so we can use the faster fixed heigh mode */
gtk_tree_view_set_fixed_height_mode(GTK_TREE_VIEW(comp->tree), TRUE);
gtk_tree_view_set_model(GTK_TREE_VIEW(comp->tree), model);
g_object_unref(model);
/* prepare the selection */
selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(comp->tree));
gtk_tree_selection_set_mode(selection, GTK_SELECTION_BROWSE);
gtk_tree_selection_set_select_function(selection, tree_selection_func, c, NULL);
/* get window dimension */
gtk_window_get_size(GTK_WINDOW(c->window), &width, &height);
/* prepare first column */
column = gtk_tree_view_column_new();
gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
gtk_tree_view_append_column(GTK_TREE_VIEW(comp->tree), column);
renderer = gtk_cell_renderer_text_new();
g_object_set(renderer,
"font-desc", c->config.comp_font,
"ellipsize", PANGO_ELLIPSIZE_MIDDLE,
NULL
);
gtk_tree_view_column_pack_start(column, renderer, TRUE);
gtk_tree_view_column_add_attribute(column, renderer, "text", COMPLETION_STORE_FIRST);
gtk_tree_view_column_set_min_width(column, 2 * width/3);
/* prepare second column */
#ifdef FEATURE_TITLE_IN_COMPLETION
column = gtk_tree_view_column_new();
gtk_tree_view_column_set_sizing(column, GTK_TREE_VIEW_COLUMN_FIXED);
gtk_tree_view_append_column(GTK_TREE_VIEW(comp->tree), column);
renderer = gtk_cell_renderer_text_new();
g_object_set(renderer,
"font-desc", c->config.comp_font,
"ellipsize", PANGO_ELLIPSIZE_END,
NULL
);
gtk_tree_view_column_pack_start(column, renderer, TRUE);
gtk_tree_view_column_add_attribute(column, renderer, "text", COMPLETION_STORE_SECOND);
#endif
/* to set the height for the treeview the tree must be realized first */
gtk_widget_show(comp->tree);
/* this prevents the first item to be placed out of view if the completion
* is shown */
while (gtk_events_pending()) {
gtk_main_iteration();
}
/* use max 1/3 of window height for the completion */
gtk_widget_get_preferred_size(comp->tree, NULL, &size);
height /= 3;
gtk_scrolled_window_set_min_content_height(
GTK_SCROLLED_WINDOW(comp->win),
size.height > height ? height : size.height
);
c->mode->flags |= FLAG_COMPLETION;
/* set to -1 to have the cursor on first or last item set in move_cursor */
comp->active = -1;
completion_next(c, back);
gtk_widget_show(comp->win);
return TRUE;
}
/**
* Initialize the completion system for given client.
*/
void completion_init(Client *c)
{
/* Allocate memory for the completion struct and save it on the client. */
c->comp = g_slice_new0(Completion);
}
/**
* Moves the selection to the next/previous tree item.
* If the end/beginning is reached return false and start on the opposite end
* on the next call.
*/
gboolean completion_next(Client *c, gboolean back)
{
int rows;
GtkTreePath *path;
GtkTreeView *tree = GTK_TREE_VIEW(((Completion*)c->comp)->tree);
Completion *comp = (Completion*)c->comp;
rows = gtk_tree_model_iter_n_children(gtk_tree_view_get_model(tree), NULL);
if (back) {
comp->active--;
/* Step back over the beginning. */
if (comp->active == -1) {
/* Unselect the current item to show the user that the shown
* content is the initial typed content. */
gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(GTK_TREE_VIEW(comp->tree)));
return FALSE;
}
if (comp->active < -1) {
comp->active = rows - 1;
}
} else {
comp->active++;
/* Step over the end. */
if (comp->active == rows) {
gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(GTK_TREE_VIEW(comp->tree)));
return FALSE;
}
if (comp->active >= rows) {
comp->active = 0;
}
}
/* get new path and move cursor to it */
path = gtk_tree_path_new_from_indices(comp->active, -1);
gtk_tree_view_set_cursor(tree, path, NULL, FALSE);
gtk_tree_path_free(path);
return TRUE;
}
/**
* Fills the given list store by matching data of also given src list.
*/
gboolean completion_fill(GtkListStore *store, const char *input, GList *src)
{
gboolean found = FALSE;
GtkTreeIter iter;
/* If no filter input given - copy all entries into the data store. */
if (!input || !*input) {
for (GList *l = src; l; l = l->next) {
gtk_list_store_append(store, &iter);
gtk_list_store_set(store, &iter, COMPLETION_STORE_FIRST, l->data, -1);
found = TRUE;
}
return found;
}
/* If filter input is given - copy matching list entires into data store.
* Strings are compared by prefix matching. */
for (GList *l = src; l; l = l->next) {
char *value = (char*)l->data;
if (g_str_has_prefix(value, input)) {
gtk_list_store_append(store, &iter);
gtk_list_store_set(store, &iter, COMPLETION_STORE_FIRST, l->data, -1);
found = TRUE;
}
}
return found;
}
static gboolean tree_selection_func(GtkTreeSelection *selection,
GtkTreeModel *model, GtkTreePath *path, gboolean selected, gpointer data)
{
char *value;
GtkTreeIter iter;
Completion *comp = (Completion*)((Client*)data)->comp;
/* if not selected means the item is going to be selected which we are
* interested in */
if (!selected && gtk_tree_model_get_iter(model, &iter, path)) {
gtk_tree_model_get(model, &iter, COMPLETION_STORE_FIRST, &value, -1);
comp->selfunc((Client*)data, value);
g_free(value);
/* TODO update comp->active on select by mouse to continue with <Tab>
* or <S-Tab> from selected item on. */
}
return TRUE;
}
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