medit/moo/mooterm/mooterm.c

/*
 *   mooterm/mooterm.c
 *
 *   Copyright (C) 2004-2005 by Yevgen Muntyan <muntyan@math.tamu.edu>
 *
 *   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.
 *
 *   See COPYING file that comes with this distribution.
 */

#define MOOTERM_COMPILATION
#include "mooterm/mooterm-private.h"
#include "mooterm/mootermparser.h"
#include "mooterm/mootermpt.h"
#include "mooterm/mootermbuffer-private.h"
#include "mooutils/moocompat.h"
#include "mooutils/moomarshals.h"


static void moo_term_finalize               (GObject        *object);

static void moo_term_realize                (GtkWidget          *widget);
static void moo_term_size_allocate          (GtkWidget          *widget,
                                             GtkAllocation      *allocation);

static gboolean moo_term_popup_menu         (GtkWidget          *widget);
static gboolean moo_term_scroll             (GtkWidget          *widget,
                                             GdkEventScroll     *event);

static void     moo_term_set_scroll_adjustments (GtkWidget      *widget,
                                                 GtkAdjustment  *hadj,
                                                 GtkAdjustment  *vadj);

static void     update_adjustment               (MooTerm        *term);
static void     update_adjustment_value         (MooTerm        *term);
static void     adjustment_value_changed        (MooTerm        *term);
static void     queue_adjustment_changed        (MooTerm        *term,
                                                 gboolean        now);
static void     queue_adjustment_value_changed  (MooTerm        *term,
                                                 gboolean        now);
static gboolean emit_adjustment_changed         (MooTerm        *term);
static gboolean emit_adjustment_value_changed   (MooTerm        *term);
static void     scroll_abs                      (MooTerm        *term,
                                                 guint           line,
                                                 gboolean        update_adj);
static void     scroll_to_bottom                (MooTerm        *term,
                                                 gboolean        update_adj);

static void     scrollback_changed              (MooTerm        *term,
                                                 GParamSpec     *pspec,
                                                 MooTermBuffer  *buf);
static void     width_changed                   (MooTerm        *term,
                                                 GParamSpec     *pspec);
static void     height_changed                  (MooTerm        *term,
                                                 GParamSpec     *pspec);

static void     im_preedit_start                (MooTerm        *term);
static void     im_preedit_end                  (MooTerm        *term);

static void     child_died                      (MooTerm        *term);


enum {
    SET_SCROLL_ADJUSTMENTS,
    SET_WINDOW_TITLE,
    SET_ICON_NAME,
    BELL,
    CHILD_DIED,
    POPULATE_POPUP,
    LAST_SIGNAL
};

enum {
    PROP_0 = 0,
    LAST_PROP
};


/* MOO_TYPE_TERM */
G_DEFINE_TYPE (MooTerm, moo_term, GTK_TYPE_WIDGET)
static guint signals[LAST_SIGNAL];


static void moo_term_class_init (MooTermClass *klass)
{
    GObjectClass   *gobject_class = G_OBJECT_CLASS (klass);
    GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

    gobject_class->finalize = moo_term_finalize;

    widget_class->realize = moo_term_realize;
    widget_class->size_allocate = moo_term_size_allocate;
    widget_class->expose_event = moo_term_expose_event;
    widget_class->key_press_event = moo_term_key_press;
    widget_class->key_release_event = moo_term_key_release;
    widget_class->popup_menu = moo_term_popup_menu;
    widget_class->scroll_event = moo_term_scroll;
    widget_class->button_press_event = moo_term_button_press;
    widget_class->button_release_event = moo_term_button_release;
    widget_class->motion_notify_event = moo_term_motion_notify;

    klass->set_scroll_adjustments = moo_term_set_scroll_adjustments;

    signals[SET_SCROLL_ADJUSTMENTS] =
            g_signal_new ("set-scroll-adjustments",
                          G_OBJECT_CLASS_TYPE (gobject_class),
                          G_SIGNAL_RUN_LAST,
                          G_STRUCT_OFFSET (MooTermClass, set_scroll_adjustments),
                          NULL, NULL,
                          _moo_marshal_VOID__OBJECT_OBJECT,
                          G_TYPE_NONE, 2,
                          GTK_TYPE_ADJUSTMENT,
                          GTK_TYPE_ADJUSTMENT);
    widget_class->set_scroll_adjustments_signal = signals[SET_SCROLL_ADJUSTMENTS];

    signals[SET_WINDOW_TITLE] =
            g_signal_new ("set-window-title",
                          G_OBJECT_CLASS_TYPE (gobject_class),
                          G_SIGNAL_RUN_LAST,
                          G_STRUCT_OFFSET (MooTermClass, set_window_title),
                          NULL, NULL,
                          _moo_marshal_VOID__STRING,
                          G_TYPE_NONE, 1,
                          G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);

    signals[SET_ICON_NAME] =
            g_signal_new ("set-icon-name",
                          G_OBJECT_CLASS_TYPE (gobject_class),
                          G_SIGNAL_RUN_LAST,
                          G_STRUCT_OFFSET (MooTermClass, set_icon_name),
                          NULL, NULL,
                          _moo_marshal_VOID__STRING,
                          G_TYPE_NONE, 1,
                          G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);

    signals[BELL] =
            g_signal_new ("bell",
                          G_OBJECT_CLASS_TYPE (gobject_class),
                          G_SIGNAL_RUN_LAST,
                          G_STRUCT_OFFSET (MooTermClass, bell),
                          NULL, NULL,
                          _moo_marshal_VOID__VOID,
                          G_TYPE_NONE, 0);

    signals[CHILD_DIED] =
            g_signal_new ("child-died",
                          G_OBJECT_CLASS_TYPE (gobject_class),
                          G_SIGNAL_RUN_LAST,
                          G_STRUCT_OFFSET (MooTermClass, child_died),
                          NULL, NULL,
                          _moo_marshal_VOID__VOID,
                          G_TYPE_NONE, 0);

    signals[POPULATE_POPUP] =
            g_signal_new ("populate-popup",
                          G_OBJECT_CLASS_TYPE (gobject_class),
                          G_SIGNAL_RUN_LAST,
                          G_STRUCT_OFFSET (MooTermClass, populate_popup),
                          NULL, NULL,
                          _moo_marshal_VOID__OBJECT,
                          G_TYPE_NONE, 1,
                          GTK_TYPE_MENU);
}


static void moo_term_init                   (MooTerm        *term)
{
    term->priv = g_new0 (MooTermPrivate, 1);

    term->priv->pt = moo_term_pt_new (term);
    g_signal_connect_swapped (term->priv->pt, "child-died",
                              G_CALLBACK (child_died), term);

    term->priv->parser = moo_term_parser_new (term);

    term->priv->primary_buffer = moo_term_buffer_new (80, 24);
    term->priv->alternate_buffer = moo_term_buffer_new (80, 24);
    term->priv->buffer = term->priv->primary_buffer;

    term->priv->width = 80;
    term->priv->height = 24;

    term->priv->selection = term_selection_new ();

    term->priv->cursor_visible = TRUE;

    term->priv->settings.hide_pointer_on_keypress = TRUE;
    term->priv->settings.meta_sends_escape = TRUE;
    term->priv->settings.scroll_on_keystroke = TRUE;
    term->priv->settings.backspace_binding = MOO_TERM_ERASE_AUTO;
    term->priv->settings.delete_binding = MOO_TERM_ERASE_AUTO;

    term->priv->pointer_visible = TRUE;

    set_default_modes (term->priv->modes);
    set_default_modes (term->priv->saved_modes);

    g_signal_connect_swapped (term->priv->primary_buffer,
                              "notify::scrollback",
                              G_CALLBACK (scrollback_changed),
                              term);
    g_signal_connect_swapped (term->priv->alternate_buffer,
                              "notify::scrollback",
                              G_CALLBACK (scrollback_changed),
                              term);

    g_signal_connect_swapped (term->priv->buffer,
                              "notify::screen-width",
                              G_CALLBACK (width_changed),
                              term);
    g_signal_connect_swapped (term->priv->buffer,
                              "notify::screen-height",
                              G_CALLBACK (height_changed),
                              term);

    g_signal_connect_swapped (term->priv->primary_buffer,
                              "changed",
                              G_CALLBACK (moo_term_buf_content_changed),
                              term);
    g_signal_connect_swapped (term->priv->alternate_buffer,
                              "changed",
                              G_CALLBACK (moo_term_buf_content_changed),
                              term);

    g_signal_connect_swapped (term->priv->primary_buffer,
                              "cursor-moved",
                              G_CALLBACK (moo_term_cursor_moved),
                              term);
    g_signal_connect_swapped (term->priv->alternate_buffer,
                              "cursor-moved",
                              G_CALLBACK (moo_term_cursor_moved),
                              term);

    g_signal_connect_swapped (term->priv->primary_buffer,
                              "feed-child",
                              G_CALLBACK (moo_term_feed_child),
                              term);
    g_signal_connect_swapped (term->priv->alternate_buffer,
                              "feed-child",
                              G_CALLBACK (moo_term_feed_child),
                              term);
}


static void moo_term_finalize               (GObject        *object)
{
    guint i, j;
    MooTerm *term = MOO_TERM (object);

    g_object_unref (term->priv->pt);
    moo_term_parser_free (term->priv->parser);

    g_object_unref (term->priv->primary_buffer);
    g_object_unref (term->priv->alternate_buffer);

    term_selection_free (term->priv->selection);
    term_font_info_free (term->priv->font_info);

    g_object_unref (term->priv->back_pixmap);

    if (term->priv->changed_content)
        gdk_region_destroy (term->priv->changed_content);

    if (term->priv->pending_expose)
        g_source_remove (term->priv->pending_expose);

    g_object_unref (term->priv->clip);
    g_object_unref (term->priv->layout);

    g_object_unref (term->priv->im);

    if (term->priv->adjustment)
        g_object_unref (term->priv->adjustment);

    for (i = 0; i < POINTERS_NUM; ++i)
        if (term->priv->pointer[i])
            gdk_cursor_unref (term->priv->pointer[i]);

    /* TODO TODO TODO */
    for (i = 0; i < 1; ++i)
        for (j = 0; j <= MOO_TERM_COLOR_MAX; ++j)
    {
        g_object_unref (term->priv->fg[i][j]);
        g_object_unref (term->priv->bg[i][j]);
    }
    g_object_unref (term->priv->fg[1][MOO_TERM_COLOR_MAX]);
    g_object_unref (term->priv->bg[1][MOO_TERM_COLOR_MAX]);
    g_object_unref (term->priv->fg[2][MOO_TERM_COLOR_MAX]);
    g_object_unref (term->priv->bg[2][MOO_TERM_COLOR_MAX]);

    g_free (term->priv);
    G_OBJECT_CLASS (moo_term_parent_class)->finalize (object);
}


static void moo_term_size_allocate          (GtkWidget          *widget,
                                             GtkAllocation      *allocation)
{
    int old_width, old_height;
    MooTerm *term = MOO_TERM (widget);

    old_width = widget->allocation.width;
    old_height = widget->allocation.height;
    widget->allocation = *allocation;

    if (GTK_WIDGET_REALIZED (widget))
    {
        gdk_window_move_resize (widget->window,
                                allocation->x, allocation->y,
                                allocation->width, allocation->height);

        if (old_width != allocation->width || old_height != allocation->height)
            moo_term_size_changed (term);
    }
}


static void moo_term_realize                (GtkWidget          *widget)
{
    MooTerm *term;
    GdkWindowAttr attributes;
    gint attributes_mask;
    GdkDisplay *display;
    GdkBitmap *empty_bitmap;
    GdkColor useless = {0, 0, 0, 0};
    char invisible_cursor_bits[] = { 0x0 };

    term = MOO_TERM (widget);

    empty_bitmap = gdk_bitmap_create_from_data (NULL, invisible_cursor_bits, 1, 1);
    term->priv->pointer[POINTER_NONE] =
            gdk_cursor_new_from_pixmap (empty_bitmap,
                                        empty_bitmap,
                                        &useless,
                                        &useless, 0, 0);

    display = gtk_widget_get_display (widget);
    term->priv->pointer[POINTER_TEXT] =
            gdk_cursor_new_for_display (display, GDK_XTERM);
    term->priv->pointer[POINTER_NORMAL] = NULL;

    attributes.window_type = GDK_WINDOW_CHILD;
    attributes.x = widget->allocation.x;
    attributes.y = widget->allocation.y;
    attributes.width = widget->allocation.width;
    attributes.height = widget->allocation.height;
    attributes.wclass = GDK_INPUT_OUTPUT;
    attributes.visual = gtk_widget_get_visual (widget);
    attributes.colormap = gtk_widget_get_colormap (widget);
    attributes.cursor = term->priv->pointer[POINTER_TEXT];
    attributes.event_mask = gtk_widget_get_events (widget) |
            GDK_EXPOSURE_MASK |
            GDK_BUTTON_PRESS_MASK |
            GDK_BUTTON_RELEASE_MASK |
            GDK_POINTER_MOTION_HINT_MASK |
            GDK_POINTER_MOTION_MASK |
            GDK_KEY_PRESS_MASK |
            GDK_KEY_RELEASE_MASK;
    attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL |
            GDK_WA_COLORMAP | GDK_WA_CURSOR;

    GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED | GTK_CAN_FOCUS | GTK_CAN_DEFAULT);
    widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
                                     &attributes, attributes_mask);
    gdk_window_set_user_data (widget->window, widget);

    widget->style = gtk_style_attach (widget->style, widget->window);

    gtk_widget_set_double_buffered (widget, FALSE);

    moo_term_setup_palette (term);
    moo_term_init_font_stuff (term);
    moo_term_init_back_pixmap (term);
    moo_term_size_changed (term);

    gdk_window_set_background (widget->window, &(widget->style->white));

    term->priv->im = gtk_im_multicontext_new ();
    gtk_im_context_set_client_window (term->priv->im, widget->window);
    gtk_im_context_set_use_preedit (term->priv->im, FALSE);
    g_signal_connect (term->priv->im, "commit",
                      G_CALLBACK (moo_term_im_commit), term);
    g_signal_connect_swapped (term->priv->im, "preedit-start",
                              G_CALLBACK (im_preedit_start), term);
    g_signal_connect_swapped (term->priv->im, "preedit-end",
                              G_CALLBACK (im_preedit_end), term);
    gtk_im_context_focus_in (term->priv->im);
}


static void     im_preedit_start    (MooTerm        *term)
{
    term->priv->im_preedit_active = TRUE;
}


static void     im_preedit_end      (MooTerm        *term)
{
    term->priv->im_preedit_active = FALSE;
}


static void     child_died                      (MooTerm        *term)
{
    g_signal_emit (term, signals[CHILD_DIED], 0);
}


static void     moo_term_set_scroll_adjustments (GtkWidget      *widget,
                                                 G_GNUC_UNUSED GtkAdjustment  *hadj,
                                                 GtkAdjustment  *vadj)
{
    moo_term_set_adjustment (MOO_TERM (widget), vadj);
}


void             moo_term_set_adjustment    (MooTerm        *term,
                                             GtkAdjustment  *vadj)
{
    if (term->priv->adjustment == vadj)
        return;

    if (term->priv->adjustment)
    {
        g_signal_handlers_disconnect_by_func (term->priv->adjustment,
                                              (gpointer) adjustment_value_changed,
                                              term);
        g_object_unref (term->priv->adjustment);
    }

    term->priv->adjustment = vadj;

    if (term->priv->adjustment)
    {
        g_object_ref (term->priv->adjustment);
        gtk_object_sink (GTK_OBJECT (term->priv->adjustment));

        update_adjustment (term);
        g_signal_connect_swapped (term->priv->adjustment,
                                  "value-changed",
                                  G_CALLBACK (adjustment_value_changed),
                                  term);
    }
}


static void     scrollback_changed              (MooTerm        *term,
                                                 G_GNUC_UNUSED GParamSpec *pspec,
                                                 MooTermBuffer  *buf)
{
    g_assert (!strcmp (pspec->name, "scrollback"));

    if (buf == term->priv->buffer)
    {
        guint scrollback = buf_scrollback (term->priv->buffer);

        if (term->priv->_scrolled && term->priv->_top_line > scrollback)
            scroll_to_bottom (term, TRUE);
        else
            update_adjustment (term);
    }
}


static void     width_changed                   (MooTerm        *term,
                                                 G_GNUC_UNUSED GParamSpec *pspec)
{
    g_assert (!strcmp (pspec->name, "screen-width"));

    term->priv->width = buf_screen_width (term->priv->buffer);

    if (GTK_WIDGET_REALIZED (term))
        moo_term_resize_back_pixmap (term);

    term_selection_set_width (term, term->priv->width);
    term_selection_clear (term);
}


static void     height_changed                  (MooTerm        *term,
                                                 G_GNUC_UNUSED GParamSpec *pspec)
{
    guint scrollback = buf_scrollback (term->priv->buffer);

    g_assert (!strcmp (pspec->name, "screen-height"));

    term->priv->height = buf_screen_height (term->priv->buffer);

    if (!term->priv->_scrolled || term->priv->_top_line > scrollback)
        scroll_to_bottom (term, TRUE);
    else
        update_adjustment (term);

    if (GTK_WIDGET_REALIZED (term))
        moo_term_resize_back_pixmap (term);

    term_selection_clear (term);
    moo_term_invalidate_all (term);
}


#define equal(a, b) (ABS((a)-(b)) < 0.4)

static void     update_adjustment               (MooTerm        *term)
{
    double upper, value, page_size;
    GtkAdjustment *adj = term->priv->adjustment;
    gboolean now = FALSE;

    if (!adj)
        return;

    upper = buf_total_height (term->priv->buffer);
    value = term_top_line (term);
    page_size = term->priv->height;

    if ((ABS (upper - term->priv->adjustment->upper) >
         ADJUSTMENT_DELTA * page_size) ||
         (ABS (value - term->priv->adjustment->value) >
         ADJUSTMENT_DELTA * page_size))
    {
        now = TRUE;
    }

    if (!equal (adj->lower, 0.0) || !equal (adj->upper, upper) ||
         !equal (adj->value, value) || !equal (adj->page_size, page_size) ||
         !equal (adj->page_increment, page_size) || !equal (adj->step_increment, 1.0))
    {
        adj->lower = 0.0;
        adj->upper = upper;
        adj->value = value;
        adj->page_size = page_size;
        adj->page_increment = page_size;
        adj->step_increment = 1.0;

        queue_adjustment_changed (term, now);
    }
}


static void     update_adjustment_value         (MooTerm        *term)
{
    double value = term_top_line (term);
    gboolean now = FALSE;

    if (!term->priv->adjustment)
        return;

    if (ABS (value - term->priv->adjustment->value) >
         ADJUSTMENT_DELTA * term->priv->height)
    {
        now = TRUE;
    }

    if (!equal (term->priv->adjustment->value, value))
    {
        term->priv->adjustment->value = value;
        queue_adjustment_value_changed (term, now);
    }
}


static void     adjustment_value_changed        (MooTerm        *term)
{
    guint val, real_val;

    g_assert (term->priv->adjustment != NULL);

    val = term->priv->adjustment->value;
    real_val = term_top_line (term);

    if (val == real_val)
        return;

    g_return_if_fail (val <= buf_scrollback (term->priv->buffer));

    scroll_abs (term, val, FALSE);
}


static void     queue_adjustment_changed        (MooTerm        *term,
                                                 gboolean        now)
{
    if (now)
    {
        if (term->priv->pending_adjustment_changed)
            g_source_remove (term->priv->pending_adjustment_changed);
        term->priv->pending_adjustment_changed = 0;
        emit_adjustment_changed (term);
    }
    else if (!term->priv->pending_adjustment_changed)
    {
        term->priv->pending_adjustment_changed =
                g_idle_add_full (ADJUSTMENT_PRIORITY,
                                 (GSourceFunc) emit_adjustment_changed,
                                 term,
                                 NULL);
    }
}


static void     queue_adjustment_value_changed  (MooTerm        *term,
                                                 gboolean        now)
{
    if (now)
    {
        if (term->priv->pending_adjustment_value_changed)
            g_source_remove (term->priv->pending_adjustment_value_changed);
        term->priv->pending_adjustment_value_changed = 0;
        emit_adjustment_value_changed (term);
    }
    else if (!term->priv->pending_adjustment_value_changed)
    {
        term->priv->pending_adjustment_value_changed =
                g_idle_add_full(ADJUSTMENT_PRIORITY,
                                (GSourceFunc) emit_adjustment_value_changed,
                                term,
                                NULL);
    }
}


static gboolean emit_adjustment_changed         (MooTerm        *term)
{
    term->priv->pending_adjustment_changed = 0;
    gtk_adjustment_changed (term->priv->adjustment);
    return FALSE;
}


static gboolean emit_adjustment_value_changed   (MooTerm        *term)
{
    term->priv->pending_adjustment_value_changed = 0;
    gtk_adjustment_value_changed (term->priv->adjustment);
    return FALSE;
}


static void     scroll_abs                      (MooTerm        *term,
                                                 guint           line,
                                                 gboolean        update_adj)
{
    if (term_top_line (term) == line)
    {
        if (update_adj)
            update_adjustment_value (term);

        return;
    }

    if (line >= buf_scrollback (term->priv->buffer))
        return scroll_to_bottom (term, update_adj);

    term->priv->_top_line = line;
    term->priv->_scrolled = TRUE;

    moo_term_invalidate_content_all (term);
    moo_term_invalidate_all (term);

    if (update_adj)
        update_adjustment_value (term);
}


static void     scroll_to_bottom                (MooTerm        *term,
                                                 gboolean        update_adj)
{
    guint scrollback = buf_scrollback (term->priv->buffer);
    gboolean update_full = FALSE;

    if (!term->priv->_scrolled && term->priv->_top_line <= scrollback)
    {
        if (update_adj)
            update_adjustment_value (term);
        return;
    }

    if (term->priv->_top_line > scrollback)
    {
        term->priv->_top_line = scrollback;
        update_full = TRUE;
    }

    term->priv->_scrolled = FALSE;

    moo_term_invalidate_content_all (term);
    moo_term_invalidate_all (term);

    if (update_full)
        update_adjustment (term);
    else if (update_adj)
        update_adjustment_value (term);
}


void        moo_term_size_changed       (MooTerm        *term)
{
    GtkWidget *widget = GTK_WIDGET (term);
    TermFontInfo *font_info = term->priv->font_info;
    guint width, height;
    guint old_width, old_height;

    width = widget->allocation.width / font_info->width;
    height = widget->allocation.height / font_info->height;
    old_width = term->priv->width;
    old_height = term->priv->height;

    if (width == old_width && height == old_height)
        return;

    moo_term_buffer_set_screen_size (term->priv->primary_buffer,
                                     width, height);
    moo_term_buffer_set_screen_size (term->priv->alternate_buffer,
                                     width, height);
    moo_term_pt_set_size (term->priv->pt, width, height);
}


gboolean         moo_term_fork_command      (MooTerm        *term,
                                             const char     *cmd,
                                             const char     *working_dir,
                                             char          **envp)
{
    g_return_val_if_fail (MOO_IS_TERM (term), FALSE);

    return moo_term_pt_fork_command (term->priv->pt,
                                     cmd, working_dir, envp);
}


void             moo_term_feed_child        (MooTerm        *term,
                                             const char     *string,
                                             int             len)
{
    g_return_if_fail (MOO_IS_TERM (term) && string != NULL);
    moo_term_pt_write (term->priv->pt, string, len);
}


void             moo_term_copy_clipboard    (MooTerm        *term)
{
    char *text = term_selection_get_text (term);

    if (text && *text)
        gtk_clipboard_set_text (gtk_clipboard_get (GDK_SELECTION_CLIPBOARD),
                                text, -1);

    if (text)
    {
        g_assert (*text);
        g_free (text);
    }
}


void             moo_term_ctrl_c            (MooTerm        *term)
{
    moo_term_pt_send_intr (term->priv->pt);
}


void             moo_term_paste_clipboard   (MooTerm        *term)
{
    GtkClipboard *cb;
    char *text;

    g_return_if_fail (MOO_IS_TERM (term));

    cb = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
    text = gtk_clipboard_wait_for_text (cb);

    if (text)
    {
        moo_term_pt_write (term->priv->pt, text, -1);
        g_free (text);
    }
}


void            moo_term_feed               (MooTerm        *term,
                                             const char     *data,
                                             int             len)
{
    if (!len)
        return;

    g_return_if_fail (data != NULL);

    if (len < 0)
        len = strlen (data);

    moo_term_parser_parse (term->priv->parser, data, len);
}


void             moo_term_scroll_to_top     (MooTerm        *term)
{
    scroll_abs (term, 0, TRUE);
}

void             moo_term_scroll_to_bottom  (MooTerm        *term)
{
    scroll_to_bottom (term, TRUE);
}

void             moo_term_scroll_lines      (MooTerm        *term,
                                             int             lines)
{
    int top = term_top_line (term);

    top += lines;

    if (top < 0)
        top = 0;

    scroll_abs (term, top, TRUE);
}

void             moo_term_scroll_pages      (MooTerm        *term,
                                             int             pages)
{
    int top = term_top_line (term);

    top += pages * term->priv->height;

    if (top < 0)
        top = 0;

    scroll_abs (term, top, TRUE);
}


void        moo_term_set_window_title       (MooTerm        *term,
                                             const char     *title)
{
    g_signal_emit (term, signals[SET_WINDOW_TITLE], 0, title);
}


void        moo_term_set_icon_name          (MooTerm        *term,
                                             const char     *title)
{
    g_signal_emit (term, signals[SET_ICON_NAME], 0, title);
}


void        moo_term_bell                   (MooTerm    *term)
{
    g_signal_emit (term, signals[BELL], 0);
}


void        moo_term_decid                  (MooTerm    *term)
{
    moo_term_feed_child (term, TERM_VT_DECID_STRING, -1);
}


void        moo_term_set_dec_modes          (MooTerm    *term,
                                             int        *modes,
                                             guint       n_modes,
                                             gboolean    set)
{
    guint i;

    g_return_if_fail (n_modes != 0); /* ??? */

    for (i = 0; i < n_modes; ++i)
    {
        int mode = -1;

        switch (modes[i])
        {
            case 47:
                moo_term_set_alternate_buffer (term, set);
                break;

            default:
                GET_DEC_MODE (modes[i], mode);

                if (mode >= 0)
                    moo_term_set_mode (term, mode, set);
        }
    }
}


void        moo_term_save_dec_modes         (MooTerm    *term,
                                             int        *modes,
                                             guint       n_modes)
{
    guint i;

    g_return_if_fail (n_modes != 0); /* ??? */

    for (i = 0; i < n_modes; ++i)
    {
        int mode = -1;

        GET_DEC_MODE (modes[i], mode);

        if (mode >= 0)
            term->priv->saved_modes[mode] = term->priv->modes[mode];
    }
}


void        moo_term_restore_dec_modes      (MooTerm    *term,
                                             int        *modes,
                                             guint       n_modes)
{
    guint i;

    g_return_if_fail (n_modes != 0); /* ??? */

    for (i = 0; i < n_modes; ++i)
    {
        int mode = -1;

        GET_DEC_MODE (modes[i], mode);

        if (mode >= 0)
            moo_term_set_mode (term, mode, term->priv->saved_modes[mode]);
    }
}


void        moo_term_set_ansi_modes         (MooTerm    *term,
                                             int        *modes,
                                             guint       n_modes,
                                             gboolean    set)
{
    guint i;

    g_return_if_fail (n_modes != 0); /* ??? */

    for (i = 0; i < n_modes; ++i)
    {
        int mode = -1;

        GET_ANSI_MODE (modes[i], mode);

        if (mode >= 0)
            moo_term_set_mode (term, mode, set);
    }
}


void        moo_term_set_mode               (MooTerm    *term,
                                             int         mode,
                                             gboolean    set)
{
#if 1
    switch (mode)
    {
        case MODE_DECSCNM:
            g_message ("set MODE_DECSCNM %s", set ? "TRUE" : "FALSE");
            break;
#if 0
        case MODE_DECTCEM:
            g_message ("set MODE_DECTCEM %s", set ? "TRUE" : "FALSE");
            break;
#endif
        case MODE_CA:
            g_message ("set MODE_CA %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_REVERSE_WRAPAROUND:
            g_message ("set MODE_REVERSE_WRAPAROUND %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_PRESS_TRACKING:
            g_message ("set MODE_PRESS_TRACKING %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_PRESS_AND_RELEASE_TRACKING:
            g_message ("set MODE_PRESS_AND_RELEASE_TRACKING %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_HILITE_MOUSE_TRACKING:
            g_message ("set MODE_HILITE_MOUSE_TRACKING %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_SRM:
            g_message ("set MODE_SRM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_LNM:
            g_message ("set MODE_LNM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECNKM:
            g_message ("set MODE_DECNKM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECCKM:
            g_message ("set MODE_DECCKM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECANM:
            g_message ("set MODE_DECANM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECBKM:
            g_message ("set MODE_DECBKM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECKPM:
            g_message ("set MODE_DECKPM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_IRM:
            g_message ("set MODE_IRM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECOM:
            g_message ("set MODE_DECOM %s", set ? "TRUE" : "FALSE");
            break;
        case MODE_DECAWM:
            g_message ("set MODE_DECAWM %s", set ? "TRUE" : "FALSE");
            break;
    }
#endif

    switch (mode)
    {
        case MODE_DECSCNM:
            term->priv->modes[mode] = set;
            moo_term_buffer_set_mode (term->priv->buffer, mode, set);
            moo_term_invert_colors (term, set);
            break;

        case MODE_DECTCEM:
            term->priv->modes[mode] = set;
            moo_term_buffer_set_mode (term->priv->buffer, mode, set);
            moo_term_set_cursor_visible (term, set);
            break;

        case MODE_CA:
            term->priv->modes[mode] = set;
            moo_term_buffer_set_mode (term->priv->buffer, mode, set);
            moo_term_set_ca_mode (term, set);
            break;

        case MODE_PRESS_TRACKING:
        case MODE_PRESS_AND_RELEASE_TRACKING:
        case MODE_HILITE_MOUSE_TRACKING:
            if (set)
                moo_term_set_mouse_tracking (term, mode);
            else
                moo_term_set_mouse_tracking (term, -1);
            term->priv->modes[mode] = set;
            moo_term_buffer_set_mode (term->priv->buffer, mode, set);
            break;

        /* these do not require anything special, just record the value */
        case MODE_SRM:
        case MODE_LNM:
        case MODE_DECNKM:
        case MODE_DECCKM:
        case MODE_DECANM:
        case MODE_DECBKM:
        case MODE_DECKPM:
        case MODE_REVERSE_WRAPAROUND:
            term->priv->modes[mode] = set;
            moo_term_buffer_set_mode (term->priv->buffer, mode, set);
            break;

        /* these are ignored */
        case MODE_IRM:
        case MODE_DECOM:
        case MODE_DECAWM:
            term->priv->modes[mode] = set;
            moo_term_buffer_set_mode (term->priv->buffer, mode, set);
            break;

        default:
            g_warning ("%s: unknown mode %d", G_STRFUNC, mode);
    }
}


void        moo_term_set_ca_mode            (MooTerm    *term,
                                             gboolean    set)
{
    TERM_IMPLEMENT_ME;
}


void        moo_term_set_alternate_buffer   (MooTerm        *term,
                                             gboolean        alternate)
{
    TERM_IMPLEMENT_ME;
}


void        moo_term_da1                    (MooTerm    *term)
{
    moo_term_feed_child (term, "\233?64;1;c", -1);

    /*
    1   132 columns
    2   Printer port
    4   Sixel
    6   Selective erase
    7   Soft character set (DRCS)       TODO
    8   User-defined keys (UDKs)        TODO
    9   National replacement character sets (NRCS)
        (International terminal only)   TODO
    12  Yugoslavian (SCS)
    15  Technical character set         TODO
    18  Windowing capability            TODO
    21  Horizontal scrolling            TODO
    23  Greek
    24  Turkish
    42  ISO Latin-2 character set
    44  PCTerm                          TODO
    45  Soft key map                    TODO
    46  ASCII emulation                 TODO
    */
}

void        moo_term_da2                    (MooTerm    *term)
{
    /* TODO */
    moo_term_feed_child (term, "\233>61;20;1;c", -1);
}

void        moo_term_da3                    (MooTerm    *term)
{
    /* TODO */
    moo_term_feed_child (term, "\220!|FFFFFFFF\234", -1);
}


#define make_DECRQSS(c)                                  \
    answer = g_strdup_printf ("\220%s$r" FINAL_##c "\234", ps)

void        moo_term_setting_request        (MooTerm    *term,
                                             int         setting)
{
    DECRQSSCode code = setting;
    char *ps = NULL, *answer = NULL;

    switch (code)
    {
        case CODE_DECSASD:       /* Select Active Status Display*/
            ps = g_strdup ("0");
            make_DECRQSS (DECSASD);
            break;
        case CODE_DECSCL:        /* Set Conformance Level */
            ps = g_strdup ("61");
            make_DECRQSS (DECSCL);
            break;
        case CODE_DECSCPP:       /* Set Columns Per Page */
            ps = g_strdup_printf ("%d", term->priv->width);
            make_DECRQSS (DECSCPP);
            break;
        case CODE_DECSLPP:       /* Set Lines Per Page */
            ps = g_strdup_printf ("%d", term->priv->height);
            make_DECRQSS (DECSLPP);
            break;
        case CODE_DECSNLS:       /* Set Number of Lines per Screen */
            ps = g_strdup_printf ("%d", term->priv->height);
            make_DECRQSS (DECSNLS);
            break;
        case CODE_DECSTBM:       /* Set Top and Bottom Margins */
            ps = g_strdup_printf ("%d;%d",
                                  term->priv->buffer->priv->top_margin + 1,
                                  term->priv->buffer->priv->bottom_margin + 1);
            make_DECRQSS (DECSTBM);
            break;
    }

    moo_term_feed_child (term, answer, -1);
    g_free (answer);
    g_free (ps);
}


void        moo_term_reset                  (MooTerm    *term)
{
    moo_term_buffer_freeze_changed_notify (term->priv->primary_buffer);
    moo_term_buffer_freeze_cursor_notify (term->priv->primary_buffer);

    term->priv->buffer = term->priv->primary_buffer;
    moo_term_buffer_reset (term->priv->primary_buffer);
    moo_term_buffer_reset (term->priv->alternate_buffer);
    set_default_modes (term->priv->modes);
    set_default_modes (term->priv->saved_modes);

    moo_term_buffer_thaw_changed_notify (term->priv->primary_buffer);
    moo_term_buffer_thaw_cursor_notify (term->priv->primary_buffer);
    moo_term_buffer_changed (term->priv->primary_buffer);
    moo_term_buffer_cursor_moved (term->priv->primary_buffer);
}


void        moo_term_soft_reset             (MooTerm    *term)
{
    moo_term_buffer_freeze_changed_notify (term->priv->buffer);
    moo_term_buffer_freeze_cursor_notify (term->priv->buffer);

    moo_term_buffer_soft_reset (term->priv->buffer);
    set_default_modes (term->priv->modes);
    set_default_modes (term->priv->saved_modes);

    moo_term_buffer_thaw_changed_notify (term->priv->primary_buffer);
    moo_term_buffer_thaw_cursor_notify (term->priv->primary_buffer);
    moo_term_buffer_changed (term->priv->primary_buffer);
    moo_term_buffer_cursor_moved (term->priv->primary_buffer);
}


void        moo_term_dsr                    (MooTerm    *term,
                                             int         type,
                                             int         arg,
                                             gboolean    extended)
{
    char *answer = NULL;
    MooTermBuffer *buf = term->priv->buffer;

    switch (type)
    {
        case 6:
            if (extended)
                answer = g_strdup_printf ("\233%d;%d;0R",
                                          buf_cursor_row (buf) + 1,
                                          buf_cursor_col (buf) + 1);
            else
                answer = g_strdup_printf ("\233%d;%dR",
                                          buf_cursor_row (buf) + 1,
                                          buf_cursor_col (buf) + 1);
            break;

            break;
        case 75:
            answer = g_strdup ("\233?70n");
            break;
        case 26:
            answer = g_strdup ("\233?27;1;0;5n");
            break;
        case 62:
            answer = g_strdup ("\2330*{");
            break;
        case 63:
            if (arg > 0)
                answer = g_strdup_printf ("\220%d!~30303030\234", arg);
            else
                answer = g_strdup ("\220!~30303030\234");
            break;
        case 5:
            answer = g_strdup ("\2330n");
            break;
        case 15:
            answer = g_strdup ("\233?13n");
            break;
        case 25:
            answer = g_strdup ("\233?21n");
            break;

        default:
            g_warning ("%s: unknown request", G_STRFUNC);
    }

    if (answer)
    {
        moo_term_feed_child (term, answer, -1);
        g_free (answer);
    }
}


void        moo_term_update_pointer         (MooTerm        *term)
{
    if (term->priv->pointer_visible)
    {
        if (term->priv->tracking_mouse)
            gdk_window_set_cursor (GTK_WIDGET(term)->window,
                                   term->priv->pointer[POINTER_NORMAL]);
        else
            gdk_window_set_cursor (GTK_WIDGET(term)->window,
                                   term->priv->pointer[POINTER_TEXT]);
    }
    else
    {
        gdk_window_set_cursor (GTK_WIDGET(term)->window,
                               term->priv->pointer[POINTER_NONE]);
    }
}


void        moo_term_set_pointer_visible    (MooTerm        *term,
                                             gboolean        visible)
{
    g_return_if_fail (GTK_WIDGET_REALIZED (term));

    if (visible != term->priv->pointer_visible)
    {
        term->priv->pointer_visible = visible;
        moo_term_update_pointer (term);
    }
}


static gboolean moo_term_popup_menu         (GtkWidget      *widget)
{
    moo_term_do_popup_menu (MOO_TERM (widget), NULL);
    return TRUE;
}


static void menu_position_func (G_GNUC_UNUSED GtkMenu     *menu,
                                gint        *px,
                                gint        *py,
                                gboolean    *push_in,
                                MooTerm     *term)
{
    guint cursor_row, cursor_col;
    GdkWindow *window;

    window = GTK_WIDGET(term)->window;
    gdk_window_get_origin (window, px, py);

    cursor_col = buf_cursor_col (term->priv->buffer);
    cursor_row = buf_cursor_row (term->priv->buffer);
    cursor_row += buf_scrollback (term->priv->buffer);

    if (cursor_row >= term_top_line (term))
    {
        cursor_row -= term_top_line (term);
        *px += (cursor_col + 1) * term_char_width (term);
        *py += (cursor_row + 1) * term_char_height (term);
    }
    else
    {
        int x, y, width, height;
        GdkModifierType mask;
        gdk_window_get_pointer (window, &x, &y, &mask);
        gdk_drawable_get_size (GDK_DRAWABLE (window), &width, &height);
        *px += CLAMP (x, 2, width - 2);
        *py += CLAMP (x, 2, height - 2);
    }

    *push_in = TRUE;
}


void        moo_term_do_popup_menu          (MooTerm        *term,
                                             GdkEventButton *event)
{
    GtkWidget *menu;

    menu = gtk_menu_new ();
    g_signal_connect (menu, "deactivate",
                      G_CALLBACK (gtk_widget_destroy), NULL);

    /* TODO: add copy/paste */
    g_signal_emit (term, signals[POPULATE_POPUP], 0, menu);

    if (event)
        gtk_menu_popup (GTK_MENU (menu), NULL, NULL, NULL, NULL,
                        event->button, event->time);
    else
        gtk_menu_popup (GTK_MENU (menu), NULL, NULL,
                        (GtkMenuPositionFunc) menu_position_func,
                        term, 0, gtk_get_current_event_time ());
}


static gboolean moo_term_scroll             (GtkWidget      *widget,
                                             GdkEventScroll *event)
{
    switch (event->direction)
    {
        case GDK_SCROLL_UP:
            moo_term_scroll_lines (MOO_TERM (widget), -SCROLL_GRANULARITY);
            return TRUE;

        case GDK_SCROLL_DOWN:
            moo_term_scroll_lines (MOO_TERM (widget), SCROLL_GRANULARITY);
            return TRUE;

        default:
            return FALSE;
    }
}