vte.c

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/*
 *      vte.c - this file is part of Geany, a fast and lightweight IDE
 *
 *      Copyright 2005 The Geany contributors
 *
 *      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 2 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, write to the Free Software Foundation, Inc.,
 *      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
/*
 * Virtual Terminal Emulation setup and handling code, using the libvte plugin library.
 */
 
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
 
#ifdef HAVE_VTE
 
#include "vte.h"
 
#include "callbacks.h"
#include "document.h"
#include "geanyobject.h"
#include "msgwindow.h"
#include "prefs.h"
#include "sciwrappers.h"
#include "support.h"
#include "ui_utils.h"
#include "utils.h"
#include "keybindings.h"
 
/* include stdlib.h AND unistd.h, because on GNU/Linux pid_t seems to be
 * in stdlib.h, on FreeBSD in unistd.h, sys/types.h is needed for C89 */
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
 
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
 
 
VteInfo vte_info = { FALSE, FALSE, FALSE, NULL, NULL };
VteConfig *vc;
 
static GPid pid = 0;
static gboolean clean = TRUE;
static GModule *module = NULL;
static struct VteFunctions *vf;
static gchar *gtk_menu_key_accel = NULL;
static GtkWidget *terminal_label = NULL;
static guint terminal_label_update_source = 0;
 
/* use vte wordchars to select paths */
static const gchar VTE_WORDCHARS[] = "-A-Za-z0-9,./?%&#:_";
static const gchar VTE_ADDITIONAL_WORDCHARS[] = "-,./?%&#:_";
 
 
/* Incomplete VteTerminal struct from vte/vte.h. */
typedef struct _VteTerminal VteTerminal;
struct _VteTerminal
{
    GtkWidget widget;
    GtkAdjustment *adjustment;
};
 
#define VTE_TERMINAL(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), VTE_TYPE_TERMINAL, VteTerminal))
#define VTE_TYPE_TERMINAL (vf->vte_terminal_get_type())
 
typedef enum {
    VTE_CURSOR_BLINK_SYSTEM,
    VTE_CURSOR_BLINK_ON,
    VTE_CURSOR_BLINK_OFF
} VteTerminalCursorBlinkMode;
 
typedef enum {
    /* we don't care for the other possible values */
    VTE_PTY_DEFAULT = 0
} VtePtyFlags;
 
 
/* Holds function pointers we need to access the VTE API. */
struct VteFunctions
{
    guint (*vte_get_major_version) (void);
    guint (*vte_get_minor_version) (void);
    GtkWidget* (*vte_terminal_new) (void);
    pid_t (*vte_terminal_fork_command) (VteTerminal *terminal, const char *command, char **argv,
                                        char **envv, const char *directory, gboolean lastlog,
                                        gboolean utmp, gboolean wtmp);
    gboolean (*vte_terminal_spawn_sync) (VteTerminal *terminal, VtePtyFlags pty_flags,
                                         const char *working_directory, char **argv, char **envv,
                                         GSpawnFlags spawn_flags, GSpawnChildSetupFunc child_setup,
                                         gpointer child_setup_data, GPid *child_pid,
                                         GCancellable *cancellable, GError **error);
    void (*vte_terminal_set_size) (VteTerminal *terminal, glong columns, glong rows);
    void (*vte_terminal_set_word_chars) (VteTerminal *terminal, const char *spec);
    void (*vte_terminal_set_word_char_exceptions) (VteTerminal *terminal, const char *exceptions);
    void (*vte_terminal_set_mouse_autohide) (VteTerminal *terminal, gboolean setting);
    void (*vte_terminal_reset) (VteTerminal *terminal, gboolean full, gboolean clear_history);
    GType (*vte_terminal_get_type) (void);
    void (*vte_terminal_set_scroll_on_output) (VteTerminal *terminal, gboolean scroll);
    void (*vte_terminal_set_scroll_on_keystroke) (VteTerminal *terminal, gboolean scroll);
    void (*vte_terminal_set_font) (VteTerminal *terminal, const PangoFontDescription *font_desc);
    void (*vte_terminal_set_scrollback_lines) (VteTerminal *terminal, glong lines);
    gboolean (*vte_terminal_get_has_selection) (VteTerminal *terminal);
    void (*vte_terminal_copy_clipboard) (VteTerminal *terminal);
    void (*vte_terminal_paste_clipboard) (VteTerminal *terminal);
    void (*vte_terminal_set_color_foreground) (VteTerminal *terminal, const GdkColor *foreground);
    void (*vte_terminal_set_color_bold) (VteTerminal *terminal, const GdkColor *foreground);
    void (*vte_terminal_set_color_background) (VteTerminal *terminal, const GdkColor *background);
    void (*vte_terminal_feed_child) (VteTerminal *terminal, const char *data, glong length);
    void (*vte_terminal_im_append_menuitems) (VteTerminal *terminal, GtkMenuShell *menushell);
    void (*vte_terminal_set_cursor_blink_mode) (VteTerminal *terminal,
                                                VteTerminalCursorBlinkMode mode);
    void (*vte_terminal_set_cursor_blinks) (VteTerminal *terminal, gboolean blink);
    void (*vte_terminal_select_all) (VteTerminal *terminal);
    void (*vte_terminal_set_audible_bell) (VteTerminal *terminal, gboolean is_audible);
    GtkAdjustment* (*vte_terminal_get_adjustment) (VteTerminal *terminal);
 
    /* hack for the VTE 2.91 API using GdkRGBA: we wrap the API to keep using GdkColor on our side */
    void (*vte_terminal_set_color_foreground_rgba) (VteTerminal *terminal, const GdkRGBA *foreground);
    void (*vte_terminal_set_color_bold_rgba) (VteTerminal *terminal, const GdkRGBA *foreground);
    void (*vte_terminal_set_color_background_rgba) (VteTerminal *terminal, const GdkRGBA *background);
};
 
 
static void create_vte(void);
static void vte_start(GtkWidget *widget);
static void vte_restart(GtkWidget *widget);
static gboolean vte_button_pressed(GtkWidget *widget, GdkEventButton *event, gpointer user_data);
static gboolean vte_keyrelease_cb(GtkWidget *widget, GdkEventKey *event, gpointer data);
static gboolean vte_keypress_cb(GtkWidget *widget, GdkEventKey *event, gpointer data);
static gboolean vte_register_symbols(GModule *module);
static void vte_popup_menu_clicked(GtkMenuItem *menuitem, gpointer user_data);
static GtkWidget *vte_create_popup_menu(void);
static void vte_commit_cb(VteTerminal *vte, gchar *arg1, guint arg2, gpointer user_data);
static void vte_drag_data_received(GtkWidget *widget, GdkDragContext *drag_context,
                                   gint x, gint y, GtkSelectionData *data, guint info, guint ltime);
 
 
enum
{
    POPUP_COPY,
    POPUP_PASTE,
    POPUP_SELECTALL,
    POPUP_CHANGEPATH,
    POPUP_RESTARTTERMINAL,
    POPUP_PREFERENCES,
    TARGET_UTF8_STRING = 0,
    TARGET_TEXT,
    TARGET_COMPOUND_TEXT,
    TARGET_STRING,
    TARGET_TEXT_PLAIN
};
 
static const GtkTargetEntry dnd_targets[] =
{
  { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  { "TEXT", 0, TARGET_TEXT },
  { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  { "STRING", 0, TARGET_STRING },
  { "text/plain", 0, TARGET_TEXT_PLAIN },
};
 
 
/* replacement for vte_terminal_get_adjustment() when it's not available */
static GtkAdjustment *default_vte_terminal_get_adjustment(VteTerminal *vte)
{
    if (GTK_IS_SCROLLABLE(vte))
        return gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(vte));
    /* this is only valid in < 0.38, 0.38 broke ABI */
    return vte->adjustment;
}
 
 
/* Wrap VTE 2.91 API using GdkRGBA with GdkColor so we use a single API on our side */
 
static void rgba_from_color(GdkRGBA *rgba, const GdkColor *color)
{
    rgba->red = color->red / 65535.0;
    rgba->green = color->green / 65535.0;
    rgba->blue = color->blue / 65535.0;
    rgba->alpha = 1.0;
}
 
#define WRAP_RGBA_SETTER(name) \
    static void wrap_##name(VteTerminal *terminal, const GdkColor *color) \
    { \
        GdkRGBA rgba; \
        rgba_from_color(&rgba, color); \
        vf->name##_rgba(terminal, &rgba); \
    }
 
WRAP_RGBA_SETTER(vte_terminal_set_color_background)
WRAP_RGBA_SETTER(vte_terminal_set_color_bold)
WRAP_RGBA_SETTER(vte_terminal_set_color_foreground)
 
#undef WRAP_RGBA_SETTER
 
 
static gchar **vte_get_child_environment(void)
{
    const gchar *exclude_vars[] = {"COLUMNS", "LINES", "TERM", "TERM_PROGRAM", NULL};
 
    return utils_copy_environment(exclude_vars, "TERM", "xterm", NULL);
}
 
 
static void override_menu_key(void)
{
    if (gtk_menu_key_accel == NULL) /* for restoring the default value */
        g_object_get(G_OBJECT(gtk_settings_get_default()),
            "gtk-menu-bar-accel", &gtk_menu_key_accel, NULL);
 
    if (vc->ignore_menu_bar_accel)
        gtk_settings_set_string_property(gtk_settings_get_default(),
            "gtk-menu-bar-accel", "<Shift><Control><Mod1><Mod2><Mod3><Mod4><Mod5>F10", "Geany");
    else
        gtk_settings_set_string_property(gtk_settings_get_default(),
            "gtk-menu-bar-accel", gtk_menu_key_accel, "Geany");
}
 
 
static void on_startup_complete(G_GNUC_UNUSED GObject *dummy)
{
    GeanyDocument *doc = document_get_current();
 
    if (doc)
        vte_cwd((doc->real_path != NULL) ? doc->real_path : doc->file_name, FALSE);
}
 
 
void vte_init(void)
{
    if (vte_info.have_vte == FALSE)
    {   /* vte_info.have_vte can be false even if VTE is compiled in, think of command line option */
        geany_debug("Disabling terminal support");
        return;
    }
 
    if (!EMPTY(vte_info.lib_vte))
    {
        module = g_module_open(vte_info.lib_vte, G_MODULE_BIND_LAZY);
    }
#ifdef VTE_MODULE_PATH
    else
    {
        module = g_module_open(VTE_MODULE_PATH, G_MODULE_BIND_LAZY);
    }
#endif
 
    if (module == NULL)
    {
        gint i;
        const gchar *sonames[] = {
#ifdef __APPLE__
            "libvte-2.91.0.dylib", "libvte-2.91.dylib",
            "libvte2_90.9.dylib", "libvte2_90.dylib",
#endif
            "libvte-2.91.so", "libvte-2.91.so.0",
            "libvte2_90.so", "libvte2_90.so.9",
            NULL
        };
 
        for (i = 0; sonames[i] != NULL && module == NULL; i++)
        {
            module = g_module_open(sonames[i], G_MODULE_BIND_LAZY);
        }
    }
 
    if (module == NULL)
    {
        vte_info.have_vte = FALSE;
        geany_debug("Could not load libvte.so, embedded terminal support disabled");
        return;
    }
    else
    {
        geany_debug("Loaded libvte from %s", g_module_name(module));
        vf = g_new0(struct VteFunctions, 1);
        if (vte_register_symbols(module))
            vte_info.have_vte = TRUE;
        else
        {
            vte_info.have_vte = FALSE;
            g_free(vf);
            /* FIXME: is closing the module safe? see vte_close() and test on FreeBSD */
            /*g_module_close(module);*/
            module = NULL;
            return;
        }
    }
 
    create_vte();
 
    /* setup the F10 menu override (so it works before the widget is first realised). */
    override_menu_key();
 
    g_signal_connect(geany_object, "geany-startup-complete", G_CALLBACK(on_startup_complete), NULL);
}
 
 
static void on_vte_realize(void)
{
    /* the vte widget has to be realised before color changes take effect */
    vte_apply_user_settings();
 
    if (vf->vte_terminal_im_append_menuitems && vc->im_submenu)
        vf->vte_terminal_im_append_menuitems(VTE_TERMINAL(vc->vte), GTK_MENU_SHELL(vc->im_submenu));
}
 
 
static gboolean vte_start_idle(G_GNUC_UNUSED gpointer user_data)
{
    vte_start(vc->vte);
    return FALSE;
}
 
 
static void create_vte(void)
{
    GtkWidget *vte, *scrollbar, *hbox;
 
    vc->vte = vte = vf->vte_terminal_new();
    scrollbar = gtk_scrollbar_new(GTK_ORIENTATION_VERTICAL, vf->vte_terminal_get_adjustment(VTE_TERMINAL(vte)));
    gtk_widget_set_can_focus(scrollbar, FALSE);
 
    /* create menu now so copy/paste shortcuts work */
    vc->menu = vte_create_popup_menu();
    g_object_ref_sink(vc->menu);
 
    hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
    gtk_box_pack_start(GTK_BOX(hbox), vte, TRUE, TRUE, 0);
    gtk_box_pack_start(GTK_BOX(hbox), scrollbar, FALSE, FALSE, 0);
 
    /* set the default widget size first to prevent VTE expanding too much,
     * sometimes causing the hscrollbar to be too big or out of view. */
    gtk_widget_set_size_request(GTK_WIDGET(vte), 10, 10);
    vf->vte_terminal_set_size(VTE_TERMINAL(vte), 30, 1);
 
    vf->vte_terminal_set_mouse_autohide(VTE_TERMINAL(vte), TRUE);
    if (vf->vte_terminal_set_word_chars)
        vf->vte_terminal_set_word_chars(VTE_TERMINAL(vte), VTE_WORDCHARS);
    else if (vf->vte_terminal_set_word_char_exceptions)
        vf->vte_terminal_set_word_char_exceptions(VTE_TERMINAL(vte), VTE_ADDITIONAL_WORDCHARS);
 
    gtk_drag_dest_set(vte, GTK_DEST_DEFAULT_ALL,
        dnd_targets, G_N_ELEMENTS(dnd_targets), GDK_ACTION_COPY);
 
    g_signal_connect(vte, "child-exited", G_CALLBACK(vte_start), NULL);
    g_signal_connect(vte, "button-press-event", G_CALLBACK(vte_button_pressed), NULL);
    g_signal_connect(vte, "event", G_CALLBACK(vte_keypress_cb), NULL);
    g_signal_connect(vte, "key-release-event", G_CALLBACK(vte_keyrelease_cb), NULL);
    g_signal_connect(vte, "commit", G_CALLBACK(vte_commit_cb), NULL);
    g_signal_connect(vte, "motion-notify-event", G_CALLBACK(on_motion_event), NULL);
    g_signal_connect(vte, "drag-data-received", G_CALLBACK(vte_drag_data_received), NULL);
 
    /* start shell on idle otherwise the initial prompt can get corrupted */
    g_idle_add(vte_start_idle, NULL);
 
    gtk_widget_show_all(hbox);
    terminal_label = gtk_label_new(_("Terminal"));
    gtk_notebook_insert_page(GTK_NOTEBOOK(msgwindow.notebook), hbox, terminal_label, MSG_VTE);
 
    g_signal_connect_after(vte, "realize", G_CALLBACK(on_vte_realize), NULL);
}
 
 
void vte_close(void)
{
    /* free the vte widget before unloading vte module
     * this prevents a segfault on X close window if the message window is hidden */
    g_signal_handlers_disconnect_by_func(vc->vte, G_CALLBACK(vte_start), NULL);
    gtk_widget_destroy(vc->vte);
    gtk_widget_destroy(vc->menu);
    g_object_unref(vc->menu);
    g_free(vc->shell);
    g_free(vc->font);
    g_free(vc->send_cmd_prefix);
    g_free(vc);
    g_free(vf);
    g_free(gtk_menu_key_accel);
    /* Don't unload the module explicitly because it causes a segfault on FreeBSD. The segfault
     * happens when the app really exits, not directly on g_module_close(). This still needs to
     * be investigated. */
    /*g_module_close(module); */
}
 
 
static gboolean set_dirty_idle(gpointer user_data)
{
    gtk_widget_set_name(terminal_label, "geany-terminal-dirty");
    terminal_label_update_source = 0;
    return FALSE;
}
 
 
static void set_clean(gboolean value)
{
    if (clean != value)
    {
        if (terminal_label)
        {
            if (terminal_label_update_source > 0)
            {
                g_source_remove(terminal_label_update_source);
                terminal_label_update_source = 0;
            }
            if (value)
                gtk_widget_set_name(terminal_label, NULL);
            else
                terminal_label_update_source = g_timeout_add(150, set_dirty_idle, NULL);
        }
        clean = value;
    }
}
 
 
static gboolean vte_keyrelease_cb(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
    if (ui_is_keyval_enter_or_return(event->keyval) ||
        ((event->keyval == GDK_KEY_c) && (event->state & GDK_CONTROL_MASK)))
    {
        /* assume any text on the prompt has been executed when pressing Enter/Return */
        set_clean(TRUE);
    }
    return FALSE;
}
 
 
static gboolean vte_keypress_cb(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
    if (vc->enable_bash_keys)
        return FALSE;   /* Ctrl-[CD] will be handled by the VTE itself */
 
    if (event->type != GDK_KEY_RELEASE)
        return FALSE;
 
    if ((event->keyval == GDK_KEY_c ||
        event->keyval == GDK_KEY_d ||
        event->keyval == GDK_KEY_C ||
        event->keyval == GDK_KEY_D) &&
        event->state & GDK_CONTROL_MASK &&
        ! (event->state & GDK_SHIFT_MASK) && ! (event->state & GDK_MOD1_MASK))
    {
        vte_restart(widget);
        return TRUE;
    }
    return FALSE;
}
 
 
static void vte_commit_cb(VteTerminal *vte, gchar *arg1, guint arg2, gpointer user_data)
{
    set_clean(FALSE);
}
 
 
static void vte_start(GtkWidget *widget)
{
    /* split the shell command line, so arguments will work too */
    gchar **argv = g_strsplit(vc->shell, " ", -1);
 
    if (argv != NULL)
    {
        gchar **env = vte_get_child_environment();
 
        if (vf->vte_terminal_spawn_sync)
        {
            if (! vf->vte_terminal_spawn_sync(VTE_TERMINAL(widget), VTE_PTY_DEFAULT,
                                              vte_info.dir, argv, env, 0, NULL, NULL,
                                              &pid, NULL, NULL))
            {
                pid = -1;
            }
        }
        else
        {
            pid = vf->vte_terminal_fork_command(VTE_TERMINAL(widget), argv[0], argv, env,
                                                vte_info.dir, TRUE, TRUE, TRUE);
        }
        g_strfreev(env);
        g_strfreev(argv);
    }
    else
        pid = 0; /* use 0 as invalid pid */
 
    set_clean(TRUE);
}
 
 
static void vte_restart(GtkWidget *widget)
{
    vte_get_working_directory(); /* try to keep the working directory when restarting the VTE */
    if (pid > 0)
    {
        kill(pid, SIGINT);
        pid = 0;
    }
    vf->vte_terminal_reset(VTE_TERMINAL(widget), TRUE, TRUE);
    vte_start(widget);
    set_clean(TRUE);
}
 
 
static gboolean vte_button_pressed(GtkWidget *widget, GdkEventButton *event, gpointer user_data)
{
    if (event->button == 3)
    {
        gtk_widget_grab_focus(vc->vte);
        gtk_menu_popup(GTK_MENU(vc->menu), NULL, NULL, NULL, NULL, event->button, event->time);
        return TRUE;
    }
    else if (event->button == 2)
    {
        gtk_widget_grab_focus(widget);
    }
    return FALSE;
}
 
 
static void vte_set_cursor_blink_mode(void)
{
    if (vf->vte_terminal_set_cursor_blink_mode != NULL)
        /* vte >= 0.17.1 */
        vf->vte_terminal_set_cursor_blink_mode(VTE_TERMINAL(vc->vte),
            (vc->cursor_blinks) ? VTE_CURSOR_BLINK_ON : VTE_CURSOR_BLINK_OFF);
    else
        /* vte < 0.17.1 */
        vf->vte_terminal_set_cursor_blinks(VTE_TERMINAL(vc->vte), vc->cursor_blinks);
}
 
 
static gboolean vte_is_2_91(void)
{
    guint major = vf->vte_get_major_version ? vf->vte_get_major_version() : 0;
    guint minor = vf->vte_get_minor_version ? vf->vte_get_minor_version() : 0;
 
    /* 2.91 API started at 0.38 */
    return ((major > 0 || (major == 0 && minor >= 38)) ||
            /* 0.38 doesn't have runtime version checks, so check a symbol that didn't exist before */
            vf->vte_terminal_spawn_sync != NULL);
}
 
 
static gboolean vte_register_symbols(GModule *mod)
{
    #define BIND_SYMBOL_FULL(name, dest) \
        g_module_symbol(mod, name, (void*)(dest))
    #define BIND_SYMBOL(field) \
        BIND_SYMBOL_FULL(#field, &vf->field)
    #define BIND_REQUIRED_SYMBOL_FULL(name, dest) \
        G_STMT_START { \
            if (! BIND_SYMBOL_FULL(name, dest)) \
            { \
                g_critical(_("invalid VTE library \"%s\": missing symbol \"%s\""), \
                        g_module_name(mod), name); \
                return FALSE; \
            } \
        } G_STMT_END
    #define BIND_REQUIRED_SYMBOL(field) \
        BIND_REQUIRED_SYMBOL_FULL(#field, &vf->field)
    #define BIND_REQUIRED_SYMBOL_RGBA_WRAPPED(field) \
        G_STMT_START { \
            BIND_REQUIRED_SYMBOL_FULL(#field, &vf->field##_rgba); \
            vf->field = wrap_##field; \
        } G_STMT_END
 
    BIND_SYMBOL(vte_get_major_version);
    BIND_SYMBOL(vte_get_minor_version);
    BIND_REQUIRED_SYMBOL(vte_terminal_new);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_size);
    if (! BIND_SYMBOL(vte_terminal_spawn_sync))
        /* vte_terminal_spawn_sync() is available only in 0.38 */
        BIND_REQUIRED_SYMBOL(vte_terminal_fork_command);
    /* 0.38 removed vte_terminal_set_word_chars() */
    BIND_SYMBOL(vte_terminal_set_word_chars);
    /* 0.40 introduced it under a different API */
    BIND_SYMBOL(vte_terminal_set_word_char_exceptions);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_mouse_autohide);
    BIND_REQUIRED_SYMBOL(vte_terminal_reset);
    BIND_REQUIRED_SYMBOL(vte_terminal_get_type);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_scroll_on_output);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_scroll_on_keystroke);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_font);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_scrollback_lines);
    BIND_REQUIRED_SYMBOL(vte_terminal_get_has_selection);
    BIND_REQUIRED_SYMBOL(vte_terminal_copy_clipboard);
    BIND_REQUIRED_SYMBOL(vte_terminal_paste_clipboard);
 
    if (vte_is_2_91())
    {
        BIND_REQUIRED_SYMBOL_RGBA_WRAPPED(vte_terminal_set_color_foreground);
        BIND_REQUIRED_SYMBOL_RGBA_WRAPPED(vte_terminal_set_color_bold);
        BIND_REQUIRED_SYMBOL_RGBA_WRAPPED(vte_terminal_set_color_background);
    }
    else
    {
        BIND_REQUIRED_SYMBOL(vte_terminal_set_color_foreground);
        BIND_REQUIRED_SYMBOL(vte_terminal_set_color_bold);
        BIND_REQUIRED_SYMBOL(vte_terminal_set_color_background);
    }
    BIND_REQUIRED_SYMBOL(vte_terminal_feed_child);
    BIND_SYMBOL(vte_terminal_im_append_menuitems);
    if (! BIND_SYMBOL(vte_terminal_set_cursor_blink_mode))
        /* vte_terminal_set_cursor_blink_mode() is only available since 0.17.1, so if we don't find
         * this symbol, we are probably on an older version and use the old API instead */
        BIND_REQUIRED_SYMBOL(vte_terminal_set_cursor_blinks);
    BIND_REQUIRED_SYMBOL(vte_terminal_select_all);
    BIND_REQUIRED_SYMBOL(vte_terminal_set_audible_bell);
    if (! BIND_SYMBOL(vte_terminal_get_adjustment))
        /* vte_terminal_get_adjustment() is available since 0.9 and removed in 0.38 */
        vf->vte_terminal_get_adjustment = default_vte_terminal_get_adjustment;
 
    #undef BIND_REQUIRED_SYMBOL_RGBA_WRAPPED
    #undef BIND_REQUIRED_SYMBOL
    #undef BIND_REQUIRED_SYMBOL_FULL
    #undef BIND_SYMBOL
    #undef BIND_SYMBOL_FULL
 
    return TRUE;
}
 
 
void vte_apply_user_settings(void)
{
    PangoFontDescription *font_desc;
 
    if (! ui_prefs.msgwindow_visible)
        return;
 
    vf->vte_terminal_set_scrollback_lines(VTE_TERMINAL(vc->vte), vc->scrollback_lines);
    vf->vte_terminal_set_scroll_on_keystroke(VTE_TERMINAL(vc->vte), vc->scroll_on_key);
    vf->vte_terminal_set_scroll_on_output(VTE_TERMINAL(vc->vte), vc->scroll_on_out);
    font_desc = pango_font_description_from_string(vc->font);
    vf->vte_terminal_set_font(VTE_TERMINAL(vc->vte), font_desc);
    pango_font_description_free(font_desc);
    vf->vte_terminal_set_color_foreground(VTE_TERMINAL(vc->vte), &vc->colour_fore);
    vf->vte_terminal_set_color_bold(VTE_TERMINAL(vc->vte), &vc->colour_fore);
    vf->vte_terminal_set_color_background(VTE_TERMINAL(vc->vte), &vc->colour_back);
    vf->vte_terminal_set_audible_bell(VTE_TERMINAL(vc->vte), prefs.beep_on_errors);
    vte_set_cursor_blink_mode();
 
    override_menu_key();
}
 
 
static void vte_popup_menu_clicked(GtkMenuItem *menuitem, gpointer user_data)
{
    switch (GPOINTER_TO_INT(user_data))
    {
        case POPUP_COPY:
        {
            if (vf->vte_terminal_get_has_selection(VTE_TERMINAL(vc->vte)))
                vf->vte_terminal_copy_clipboard(VTE_TERMINAL(vc->vte));
            break;
        }
        case POPUP_PASTE:
        {
            vf->vte_terminal_paste_clipboard(VTE_TERMINAL(vc->vte));
            break;
        }
        case POPUP_SELECTALL:
        {
            vte_select_all();
            break;
        }
        case POPUP_CHANGEPATH:
        {
            GeanyDocument *doc = document_get_current();
            if (doc != NULL)
                vte_cwd(doc->file_name, TRUE);
            break;
        }
        case POPUP_RESTARTTERMINAL:
        {
            vte_restart(vc->vte);
            break;
        }
        case POPUP_PREFERENCES:
        {
            GtkWidget *notebook, *tab_page;
 
            prefs_show_dialog();
 
            notebook = ui_lookup_widget(ui_widgets.prefs_dialog, "notebook2");
            tab_page = ui_lookup_widget(ui_widgets.prefs_dialog, "frame_term");
 
            gtk_notebook_set_current_page(GTK_NOTEBOOK(notebook),
                gtk_notebook_page_num(GTK_NOTEBOOK(notebook), GTK_WIDGET(tab_page)));
 
            break;
        }
    }
}
 
 
static GtkWidget *vte_create_popup_menu(void)
{
    GtkWidget *menu, *item;
    GtkAccelGroup *accel_group;
    gboolean show_im_menu = TRUE;
 
    menu = gtk_menu_new();
 
    accel_group = gtk_accel_group_new();
    gtk_window_add_accel_group(GTK_WINDOW(main_widgets.window), accel_group);
 
    item = gtk_image_menu_item_new_from_stock(GTK_STOCK_COPY, NULL);
    gtk_widget_add_accelerator(item, "activate", accel_group,
        GDK_KEY_c, GEANY_PRIMARY_MOD_MASK | GDK_SHIFT_MASK, GTK_ACCEL_VISIBLE);
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
    g_signal_connect(item, "activate", G_CALLBACK(vte_popup_menu_clicked), GINT_TO_POINTER(POPUP_COPY));
 
    item = gtk_image_menu_item_new_from_stock(GTK_STOCK_PASTE, NULL);
    gtk_widget_add_accelerator(item, "activate", accel_group,
        GDK_KEY_v, GEANY_PRIMARY_MOD_MASK | GDK_SHIFT_MASK, GTK_ACCEL_VISIBLE);
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
    g_signal_connect(item, "activate", G_CALLBACK(vte_popup_menu_clicked), GINT_TO_POINTER(POPUP_PASTE));
 
    item = gtk_separator_menu_item_new();
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
 
    item = gtk_image_menu_item_new_from_stock(GTK_STOCK_SELECT_ALL, NULL);
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
    g_signal_connect(item, "activate", G_CALLBACK(vte_popup_menu_clicked), GINT_TO_POINTER(POPUP_SELECTALL));
 
    item = gtk_separator_menu_item_new();
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
 
    item = gtk_image_menu_item_new_with_mnemonic(_("_Set Path From Document"));
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
    g_signal_connect(item, "activate", G_CALLBACK(vte_popup_menu_clicked), GINT_TO_POINTER(POPUP_CHANGEPATH));
 
    item = gtk_image_menu_item_new_with_mnemonic(_("_Restart Terminal"));
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
    g_signal_connect(item, "activate", G_CALLBACK(vte_popup_menu_clicked), GINT_TO_POINTER(POPUP_RESTARTTERMINAL));
 
    item = gtk_separator_menu_item_new();
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
 
    item = gtk_image_menu_item_new_from_stock(GTK_STOCK_PREFERENCES, NULL);
    gtk_widget_show(item);
    gtk_container_add(GTK_CONTAINER(menu), item);
    g_signal_connect(item, "activate", G_CALLBACK(vte_popup_menu_clicked), GINT_TO_POINTER(POPUP_PREFERENCES));
 
    msgwin_menu_add_common_items(GTK_MENU(menu));
 
    /* VTE 2.91 doesn't have IM context items, and GTK >= 3.10 doesn't show them anyway */
    if (! vf->vte_terminal_im_append_menuitems || gtk_check_version(3, 10, 0) == NULL)
        show_im_menu = FALSE;
    else /* otherwise, query the setting */
        g_object_get(gtk_settings_get_default(), "gtk-show-input-method-menu", &show_im_menu, NULL);
 
    if (! show_im_menu)
        vc->im_submenu = NULL;
    else
    {
        item = gtk_separator_menu_item_new();
        gtk_widget_show(item);
        gtk_container_add(GTK_CONTAINER(menu), item);
 
        /* the IM submenu should always be the last item to be consistent with other GTK popup menus */
        vc->im_submenu = gtk_menu_new();
 
        item = gtk_image_menu_item_new_with_mnemonic(_("_Input Methods"));
        gtk_widget_show(item);
        gtk_container_add(GTK_CONTAINER(menu), item);
 
        gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), vc->im_submenu);
        /* submenu populated after vte realized */
    }
 
    return menu;
}
 
 
/* If the command could be executed, TRUE is returned, FALSE otherwise (i.e. there was some text
 * on the prompt). */
gboolean vte_send_cmd(const gchar *cmd)
{
    if (clean)
    {
        vf->vte_terminal_feed_child(VTE_TERMINAL(vc->vte), cmd, strlen(cmd));
        set_clean(TRUE); /* vte_terminal_feed_child() also marks the vte as not clean */
        return TRUE;
    }
    else
        return FALSE;
}
 
 
/* Taken from Terminal by os-cillation: terminal_screen_get_working_directory, thanks.
 * Determines the working directory using various OS-specific mechanisms and stores the determined
 * directory in vte_info.dir. Note: vte_info.dir contains the real path. */
const gchar *vte_get_working_directory(void)
{
    if (pid > 0)
    {
        gchar  buffer[4096 + 1];
        gchar *file = g_strdup_printf("/proc/%d/cwd", pid);
        gint   length = readlink(file, buffer, sizeof(buffer));
 
        if (length > 0 && *buffer == '/')
        {
            buffer[length] = '\0';
            g_free(vte_info.dir);
            vte_info.dir = g_strdup(buffer);
        }
        else if (length == 0)
        {
            gchar *cwd = g_get_current_dir();
 
            if (cwd != NULL)
            {
                if (chdir(file) == 0)
                {
                    g_free(vte_info.dir);
                    vte_info.dir = g_get_current_dir();
                    if (chdir(cwd) != 0)
                        geany_debug("%s: %s", G_STRFUNC, g_strerror(errno));
                }
                g_free(cwd);
            }
        }
        g_free(file);
    }
 
    return vte_info.dir;
}
 
 
/* Changes the current working directory of the VTE to the path of the given filename.
 * filename is expected to be in UTF-8 encoding.
 * filename can also be a path, then it is used directly.
 * If force is set to TRUE, it will always change the cwd
 */
void vte_cwd(const gchar *filename, gboolean force)
{
    if (vte_info.have_vte && (vc->follow_path || force) &&
        filename != NULL && g_path_is_absolute(filename))
    {
        gchar *path;
 
        if (g_file_test(filename, G_FILE_TEST_IS_DIR))
            path = g_strdup(filename);
        else
            path = g_path_get_dirname(filename);
 
        vte_get_working_directory(); /* refresh vte_info.dir */
        if (! utils_str_equal(path, vte_info.dir))
        {
            /* use g_shell_quote to avoid problems with spaces, '!' or something else in path */
            gchar *quoted_path = g_shell_quote(path);
            gchar *cmd = g_strconcat(vc->send_cmd_prefix, "cd ", quoted_path, "\n", NULL);
            if (! vte_send_cmd(cmd))
            {
                const gchar *msg = _("Directory not changed because the terminal may contain some input (press Ctrl+C or Enter to clear it).");
                ui_set_statusbar(FALSE, "%s", msg);
                geany_debug("%s", msg);
            }
            g_free(quoted_path);
            g_free(cmd);
        }
        g_free(path);
    }
}
 
 
static void vte_drag_data_received(GtkWidget *widget, GdkDragContext *drag_context,
                                   gint x, gint y, GtkSelectionData *data, guint info, guint ltime)
{
    if (info == TARGET_TEXT_PLAIN)
    {
        if (gtk_selection_data_get_format(data) == 8 && gtk_selection_data_get_length(data) > 0)
            vf->vte_terminal_feed_child(VTE_TERMINAL(widget),
                (const gchar*) gtk_selection_data_get_data(data),
                gtk_selection_data_get_length(data));
    }
    else
    {
        gchar *text = (gchar*) gtk_selection_data_get_text(data);
        if (!EMPTY(text))
            vf->vte_terminal_feed_child(VTE_TERMINAL(widget), text, strlen(text));
        g_free(text);
    }
    gtk_drag_finish(drag_context, TRUE, FALSE, ltime);
}
 
 
static void on_check_run_in_vte_toggled(GtkToggleButton *togglebutton, GtkWidget *user_data)
{
    g_return_if_fail(GTK_IS_WIDGET(user_data));
    gtk_widget_set_sensitive(user_data, gtk_toggle_button_get_active(togglebutton));
}
 
 
static void on_term_font_set(GtkFontButton *widget, gpointer user_data)
{
    const gchar *fontbtn = gtk_font_button_get_font_name(widget);
 
    if (! utils_str_equal(fontbtn, vc->font))
    {
        SETPTR(vc->font, g_strdup(gtk_font_button_get_font_name(widget)));
        vte_apply_user_settings();
    }
}
 
 
static void on_term_fg_color_set(GtkColorButton *widget, gpointer user_data)
{
    gtk_color_button_get_color(widget, &vc->colour_fore);
}
 
 
static void on_term_bg_color_set(GtkColorButton *widget, gpointer user_data)
{
    gtk_color_button_get_color(widget, &vc->colour_back);
}
 
 
void vte_append_preferences_tab(void)
{
    if (vte_info.have_vte)
    {
        GtkWidget *frame_term, *button_shell, *entry_shell;
        GtkWidget *check_run_in_vte, *check_skip_script;
        GtkWidget *font_button, *fg_color_button, *bg_color_button;
 
        button_shell = GTK_WIDGET(ui_lookup_widget(ui_widgets.prefs_dialog, "button_term_shell"));
        entry_shell = GTK_WIDGET(ui_lookup_widget(ui_widgets.prefs_dialog, "entry_shell"));
        ui_setup_open_button_callback(button_shell, NULL,
            GTK_FILE_CHOOSER_ACTION_OPEN, GTK_ENTRY(entry_shell));
 
        check_skip_script = GTK_WIDGET(ui_lookup_widget(ui_widgets.prefs_dialog, "check_skip_script"));
        gtk_widget_set_sensitive(check_skip_script, vc->run_in_vte);
 
        check_run_in_vte = GTK_WIDGET(ui_lookup_widget(ui_widgets.prefs_dialog, "check_run_in_vte"));
        g_signal_connect(G_OBJECT(check_run_in_vte), "toggled",
            G_CALLBACK(on_check_run_in_vte_toggled), check_skip_script);
 
        font_button = ui_lookup_widget(ui_widgets.prefs_dialog, "font_term");
        g_signal_connect(font_button, "font-set",  G_CALLBACK(on_term_font_set), NULL);
 
        fg_color_button = ui_lookup_widget(ui_widgets.prefs_dialog, "color_fore");
        g_signal_connect(fg_color_button, "color-set", G_CALLBACK(on_term_fg_color_set), NULL);
 
        bg_color_button = ui_lookup_widget(ui_widgets.prefs_dialog, "color_back");
        g_signal_connect(bg_color_button, "color-set", G_CALLBACK(on_term_bg_color_set), NULL);
 
        frame_term = ui_lookup_widget(ui_widgets.prefs_dialog, "frame_term");
        gtk_widget_show_all(frame_term);
    }
}
 
 
void vte_select_all(void)
{
    if (vf->vte_terminal_select_all != NULL)
        vf->vte_terminal_select_all(VTE_TERMINAL(vc->vte));
}
 
 
void vte_send_selection_to_vte(void)
{
    GeanyDocument *doc;
    gchar *text;
    gsize len;
 
    doc = document_get_current();
    g_return_if_fail(doc != NULL);
 
    if (sci_has_selection(doc->editor->sci))
    {
        text = sci_get_selection_contents(doc->editor->sci);
    }
    else
    {   /* Get the current line */
        gint line_num = sci_get_current_line(doc->editor->sci);
        text = sci_get_line(doc->editor->sci, line_num);
    }
 
    len = strlen(text);
 
    if (vc->send_selection_unsafe)
    {   /* Explicitly append a trailing newline character to get the command executed,
           this is disabled by default as it could cause all sorts of damage. */
        if (text[len-1] != '\n' && text[len-1] != '\r')
        {
            SETPTR(text, g_strconcat(text, "\n", NULL));
            len++;
        }
    }
    else
    {   /* Make sure there is no newline character at the end to prevent unwanted execution */
        while (text[len-1] == '\n' || text[len-1] == '\r')
        {
            text[len-1] = '\0';
            len--;
        }
    }
 
    vf->vte_terminal_feed_child(VTE_TERMINAL(vc->vte), text, len);
 
    /* show the VTE */
    gtk_notebook_set_current_page(GTK_NOTEBOOK(msgwindow.notebook), MSG_VTE);
    gtk_widget_grab_focus(vc->vte);
    msgwin_show_hide(TRUE);
 
    g_free(text);
}
 
 
#endif