pterm.c

远程登陆工具软件源码 用于远程登陆unix

/* Ensure that all the cut buffers exist - according to the ICCCM, we must
 * do this before we start using cut buffers.
 */
void init_cutbuffers()
{
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER0, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER1, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER2, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER3, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER4, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER5, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER6, XA_STRING, 8, PropModeAppend, "", 0);
    XChangeProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
		    XA_CUT_BUFFER7, XA_STRING, 8, PropModeAppend, "", 0);
}

/* Store the data in a cut-buffer. */
void store_cutbuffer(char * ptr, int len)
{
    /* ICCCM says we must rotate the buffers before storing to buffer 0. */
    XRotateBuffers(GDK_DISPLAY(), 1);
    XStoreBytes(GDK_DISPLAY(), ptr, len);
}

/* Retrieve data from a cut-buffer.
 * Returned data needs to be freed with XFree().
 */
char * retrieve_cutbuffer(int * nbytes)
{
    char * ptr;
    ptr = XFetchBytes(GDK_DISPLAY(), nbytes);
    if (*nbytes <= 0 && ptr != 0) {
	XFree(ptr);
	ptr = 0;
    }
    return ptr;
}

void write_clip(void *frontend, wchar_t * data, int len, int must_deselect)
{
    struct gui_data *inst = (struct gui_data *)frontend;
    if (inst->pasteout_data)
	sfree(inst->pasteout_data);
    if (inst->pasteout_data_ctext)
	sfree(inst->pasteout_data_ctext);
    if (inst->pasteout_data_utf8)
	sfree(inst->pasteout_data_utf8);

    /*
     * Set up UTF-8 and compound text paste data. This only happens
     * if we aren't in direct-to-font mode using the D800 hack.
     */
    if (!inst->direct_to_font) {
	wchar_t *tmp = data;
	int tmplen = len;
	XTextProperty tp;
	char *list[1];

	inst->pasteout_data_utf8 = snewn(len*6, char);
	inst->pasteout_data_utf8_len = len*6;
	inst->pasteout_data_utf8_len =
	    charset_from_unicode(&tmp, &tmplen, inst->pasteout_data_utf8,
				 inst->pasteout_data_utf8_len,
				 CS_UTF8, NULL, NULL, 0);
	if (inst->pasteout_data_utf8_len == 0) {
	    sfree(inst->pasteout_data_utf8);
	    inst->pasteout_data_utf8 = NULL;
	} else {
	    inst->pasteout_data_utf8 =
		sresize(inst->pasteout_data_utf8,
			inst->pasteout_data_utf8_len + 1, char);
	    inst->pasteout_data_utf8[inst->pasteout_data_utf8_len] = '\0';
	}

	/*
	 * Now let Xlib convert our UTF-8 data into compound text.
	 */
	list[0] = inst->pasteout_data_utf8;
	if (Xutf8TextListToTextProperty(GDK_DISPLAY(), list, 1,
					XCompoundTextStyle, &tp) == 0) {
	    inst->pasteout_data_ctext = snewn(tp.nitems+1, char);
	    memcpy(inst->pasteout_data_ctext, tp.value, tp.nitems);
	    inst->pasteout_data_ctext_len = tp.nitems;
	    XFree(tp.value);
	} else {
            inst->pasteout_data_ctext = NULL;
            inst->pasteout_data_ctext_len = 0;
        }
    } else {
	inst->pasteout_data_utf8 = NULL;
	inst->pasteout_data_utf8_len = 0;
	inst->pasteout_data_ctext = NULL;
	inst->pasteout_data_ctext_len = 0;
    }

    inst->pasteout_data = snewn(len*6, char);
    inst->pasteout_data_len = len*6;
    inst->pasteout_data_len = wc_to_mb(inst->ucsdata.line_codepage, 0,
				       data, len, inst->pasteout_data,
				       inst->pasteout_data_len,
				       NULL, NULL, NULL);
    if (inst->pasteout_data_len == 0) {
	sfree(inst->pasteout_data);
	inst->pasteout_data = NULL;
    } else {
	inst->pasteout_data =
	    sresize(inst->pasteout_data, inst->pasteout_data_len, char);
    }

    store_cutbuffer(inst->pasteout_data, inst->pasteout_data_len);

    if (gtk_selection_owner_set(inst->area, GDK_SELECTION_PRIMARY,
				inst->input_event_time)) {
	gtk_selection_add_target(inst->area, GDK_SELECTION_PRIMARY,
				 GDK_SELECTION_TYPE_STRING, 1);
	if (inst->pasteout_data_ctext)
	    gtk_selection_add_target(inst->area, GDK_SELECTION_PRIMARY,
				     compound_text_atom, 1);
	if (inst->pasteout_data_utf8)
	    gtk_selection_add_target(inst->area, GDK_SELECTION_PRIMARY,
				     utf8_string_atom, 1);
    }

    if (must_deselect)
	term_deselect(inst->term);
}

void selection_get(GtkWidget *widget, GtkSelectionData *seldata,
		   guint info, guint time_stamp, gpointer data)
{
    struct gui_data *inst = (struct gui_data *)data;
    if (seldata->target == utf8_string_atom)
	gtk_selection_data_set(seldata, seldata->target, 8,
			       inst->pasteout_data_utf8,
			       inst->pasteout_data_utf8_len);
    else if (seldata->target == compound_text_atom)
	gtk_selection_data_set(seldata, seldata->target, 8,
			       inst->pasteout_data_ctext,
			       inst->pasteout_data_ctext_len);
    else
	gtk_selection_data_set(seldata, seldata->target, 8,
			       inst->pasteout_data, inst->pasteout_data_len);
}

gint selection_clear(GtkWidget *widget, GdkEventSelection *seldata,
		     gpointer data)
{
    struct gui_data *inst = (struct gui_data *)data;

    term_deselect(inst->term);
    if (inst->pasteout_data)
	sfree(inst->pasteout_data);
    if (inst->pasteout_data_ctext)
	sfree(inst->pasteout_data_ctext);
    if (inst->pasteout_data_utf8)
	sfree(inst->pasteout_data_utf8);
    inst->pasteout_data = NULL;
    inst->pasteout_data_len = 0;
    inst->pasteout_data_ctext = NULL;
    inst->pasteout_data_ctext_len = 0;
    inst->pasteout_data_utf8 = NULL;
    inst->pasteout_data_utf8_len = 0;
    return TRUE;
}

void request_paste(void *frontend)
{
    struct gui_data *inst = (struct gui_data *)frontend;
    /*
     * In Unix, pasting is asynchronous: all we can do at the
     * moment is to call gtk_selection_convert(), and when the data
     * comes back _then_ we can call term_do_paste().
     */

    if (!inst->direct_to_font) {
	/*
	 * First we attempt to retrieve the selection as a UTF-8
	 * string (which we will convert to the correct code page
	 * before sending to the session, of course). If that
	 * fails, selection_received() will be informed and will
	 * fall back to an ordinary string.
	 */
	gtk_selection_convert(inst->area, GDK_SELECTION_PRIMARY,
			      utf8_string_atom,
			      inst->input_event_time);
    } else {
	/*
	 * If we're in direct-to-font mode, we disable UTF-8
	 * pasting, and go straight to ordinary string data.
	 */
	gtk_selection_convert(inst->area, GDK_SELECTION_PRIMARY,
			      GDK_SELECTION_TYPE_STRING,
			      inst->input_event_time);
    }
}

gint idle_paste_func(gpointer data);   /* forward ref */

void selection_received(GtkWidget *widget, GtkSelectionData *seldata,
			guint time, gpointer data)
{
    struct gui_data *inst = (struct gui_data *)data;
    XTextProperty tp;
    char **list;
    char *text;
    int length, count, ret;
    int free_list_required = 0;
    int free_required = 0;
    int charset;

    if (seldata->target == utf8_string_atom && seldata->length <= 0) {
	/*
	 * Failed to get a UTF-8 selection string. Try compound
	 * text next.
	 */
	gtk_selection_convert(inst->area, GDK_SELECTION_PRIMARY,
			      compound_text_atom,
			      inst->input_event_time);
	return;
    }

    if (seldata->target == compound_text_atom && seldata->length <= 0) {
	/*
	 * Failed to get UTF-8 or compound text. Try an ordinary
	 * string.
	 */
	gtk_selection_convert(inst->area, GDK_SELECTION_PRIMARY,
			      GDK_SELECTION_TYPE_STRING,
			      inst->input_event_time);
	return;
    }

    /*
     * If we have data, but it's not of a type we can deal with,
     * we have to ignore the data.
     */
    if (seldata->length > 0 &&
	seldata->type != GDK_SELECTION_TYPE_STRING &&
	seldata->type != compound_text_atom &&
	seldata->type != utf8_string_atom)
	return;

    /*
     * If we have no data, try looking in a cut buffer.
     */
    if (seldata->length <= 0) {
	text = retrieve_cutbuffer(&length);
	if (length == 0)
	    return;
	/* Xterm is rumoured to expect Latin-1, though I havn't checked the
	 * source, so use that as a de-facto standard. */
	charset = CS_ISO8859_1;
	free_required = 1;
    } else {
	/*
	 * Convert COMPOUND_TEXT into UTF-8.
	 */
	if (seldata->type == compound_text_atom) {
	    tp.value = seldata->data;
	    tp.encoding = (Atom) seldata->type;
	    tp.format = seldata->format;
	    tp.nitems = seldata->length;
	    ret = Xutf8TextPropertyToTextList(GDK_DISPLAY(), &tp,
					      &list, &count);
	    if (ret != 0 || count != 1) {
		/*
		 * Compound text failed; fall back to STRING.
		 */
		gtk_selection_convert(inst->area, GDK_SELECTION_PRIMARY,
				      GDK_SELECTION_TYPE_STRING,
				      inst->input_event_time);
		return;
	    }
	    text = list[0];
	    length = strlen(list[0]);
	    charset = CS_UTF8;
	    free_list_required = 1;
	} else {
	    text = (char *)seldata->data;
	    length = seldata->length;
	    charset = (seldata->type == utf8_string_atom ?
		       CS_UTF8 : inst->ucsdata.line_codepage);
	}
    }

    if (inst->pastein_data)
	sfree(inst->pastein_data);

    inst->pastein_data = snewn(length, wchar_t);
    inst->pastein_data_len = length;
    inst->pastein_data_len =
	mb_to_wc(charset, 0, text, length,
		 inst->pastein_data, inst->pastein_data_len);

    term_do_paste(inst->term);

    if (term_paste_pending(inst->term))
	inst->term_paste_idle_id = gtk_idle_add(idle_paste_func, inst);

    if (free_list_required)
	XFreeStringList(list);
    if (free_required)
	XFree(text);
}

gint idle_paste_func(gpointer data)
{
    struct gui_data *inst = (struct gui_data *)data;

    if (term_paste_pending(inst->term))
	term_paste(inst->term);
    else
	gtk_idle_remove(inst->term_paste_idle_id);

    return TRUE;
}


void get_clip(void *frontend, wchar_t ** p, int *len)
{
    struct gui_data *inst = (struct gui_data *)frontend;

    if (p) {
	*p = inst->pastein_data;
	*len = inst->pastein_data_len;
    }
}

static void set_window_titles(struct gui_data *inst)
{
    /*
     * We must always call set_icon_name after calling set_title,
     * since set_title will write both names. Irritating, but such
     * is life.
     */
    gtk_window_set_title(GTK_WINDOW(inst->window), inst->wintitle);
    if (!inst->cfg.win_name_always)
	gdk_window_set_icon_name(inst->window->window, inst->icontitle);
}

void set_title(void *frontend, char *title)
{
    struct gui_data *inst = (struct gui_data *)frontend;
    strncpy(inst->wintitle, title, lenof(inst->wintitle));
    inst->wintitle[lenof(inst->wintitle)-1] = '\0';
    set_window_titles(inst);
}

void set_icon(void *frontend, char *title)
{
    struct gui_data *inst = (struct gui_data *)frontend;
    strncpy(inst->icontitle, title, lenof(inst->icontitle));
    inst->icontitle[lenof(inst->icontitle)-1] = '\0';
    set_window_titles(inst);
}

void set_sbar(void *frontend, int total, int start, int page)
{
    struct gui_data *inst = (struct gui_data *)frontend;
    if (!inst->cfg.scrollbar)
	return;
    inst->sbar_adjust->lower = 0;
    inst->sbar_adjust->upper = total;
    inst->sbar_adjust->value = start;
    inst->sbar_adjust->page_size = page;
    inst->sbar_adjust->step_increment = 1;
    inst->sbar_adjust->page_increment = page/2;
    inst->ignore_sbar = TRUE;
    gtk_adjustment_changed(inst->sbar_adjust);
    inst->ignore_sbar = FALSE;
}

void scrollbar_moved(GtkAdjustment *adj, gpointer data)
{
    struct gui_data *inst = (struct gui_data *)data;

    if (!inst->cfg.scrollbar)
	return;
    if (!inst->ignore_sbar)
	term_scroll(inst->term, 1, (int)adj->value);
}

void sys_cursor(void *frontend, int x, int y)
{
    /*
     * This is meaningless under X.
     */
}

/*
 * This is still called when mode==BELL_VISUAL, even though the
 * visual bell is handled entirely within terminal.c, because we
 * may want to perform additional actions on any kind of bell (for
 * example, taskbar flashing in Windows).
 */
void beep(void *frontend, int mode)
{
    if (mode != BELL_VISUAL)
	gdk_beep();
}

int char_width(Context ctx, int uc)
{
    /*
     * Under X, any fixed-width font really _is_ fixed-width.
     * Double-width characters will be dealt with using a separate
     * font. For the moment we can simply return 1.
     */
    return 1;
}

Context get_ctx(void *frontend)
{
    struct gui_data *inst = (struct gui_data *)frontend;
    struct draw_ctx *dctx;

    if (!inst->area->window)
	return NULL;

    dctx = snew(struct draw_ctx);
    dctx->inst = inst;
    dctx->gc = gdk_gc_new(inst->area->window);
    return dctx;
}

void free_ctx(Context ctx)
{
    struct draw_ctx *dctx = (struct draw_ctx *)ctx;
    /* struct gui_data *inst = dctx->inst; */
    GdkGC *gc = dctx->gc;
    gdk_gc_unref(gc);
    sfree(dctx);
}

/*
 * Draw a line of text in the window, at given character
 * coordinates, in given attributes.
 *