/**
* Moves the handle layer of the scrollbar to the position indicated within the
* given scrollbar render state, sending any necessary Guacamole instructions
* over the given socket. The handle is the portion of the scrollbar that
* indicates the current scroll value and which the user can click and drag to
* change the value.
*
* @param scrollbar
* The scrollbar associated with the handle being repositioned.
*
* @param state
* The guac_terminal_scrollbar_render_state describing the new scrollbar
* handle position.
*
* @param socket
* The guac_socket over which any instructions necessary to perform the
* render operation should be sent.
*/
static void guac_terminal_scrollbar_move_handle(
guac_terminal_scrollbar* scrollbar,
guac_terminal_scrollbar_render_state* state,
guac_socket* socket) {
/* Send handle position */
guac_protocol_send_move(socket,
scrollbar->handle, scrollbar->container,
state->handle_x,
state->handle_y,
0);
}
/**
* Moves the main scrollbar layer to the position indicated within the given
* scrollbar render state, sending any necessary Guacamole instructions over
* the given socket.
*
* @param scrollbar
* The scrollbar to reposition.
*
* @param state
* The guac_terminal_scrollbar_render_state describing the new scrollbar
* position.
*
* @param socket
* The guac_socket over which any instructions necessary to perform the
* render operation should be sent.
*/
static void guac_terminal_scrollbar_move_container(
guac_terminal_scrollbar* scrollbar,
guac_terminal_scrollbar_render_state* state,
guac_socket* socket) {
/* Send scrollbar position */
guac_protocol_send_move(socket,
scrollbar->container, scrollbar->parent,
state->container_x,
state->container_y,
0);
}
void guac_terminal_display_dup(guac_terminal_display* display, guac_user* user,
guac_socket* socket) {
/* Create default surface */
guac_common_surface_dup(display->display_surface, user, socket);
/* Select layer is a child of the display layer */
guac_protocol_send_move(socket, display->select_layer,
display->display_layer, 0, 0, 0);
/* Send select layer size */
guac_protocol_send_size(socket, display->select_layer,
display->char_width * display->width,
display->char_height * display->height);
}
void guac_terminal_scrollbar_flush(guac_terminal_scrollbar* scrollbar) {
guac_socket* socket = scrollbar->client->socket;
/* Get old state */
int old_value = scrollbar->value;
guac_terminal_scrollbar_render_state* old_state = &scrollbar->render_state;
/* Calculate new state */
int new_value;
guac_terminal_scrollbar_render_state new_state;
calculate_state(scrollbar, &new_state, &new_value);
/* Notify of scroll if value is changing */
if (new_value != old_value && scrollbar->scroll_handler)
scrollbar->scroll_handler(scrollbar, new_value);
/* Reposition container if moved */
if (old_state->container_x != new_state.container_x
|| old_state->container_y != new_state.container_y) {
guac_protocol_send_move(socket,
scrollbar->container, scrollbar->parent,
new_state.container_x,
new_state.container_y,
0);
}
/* Resize and redraw container if size changed */
if (old_state->container_width != new_state.container_width
|| old_state->container_height != new_state.container_height) {
/* Set new size */
guac_protocol_send_size(socket, scrollbar->container,
new_state.container_width,
new_state.container_height);
/* Fill container with solid color */
guac_protocol_send_rect(socket, scrollbar->container, 0, 0,
new_state.container_width,
new_state.container_height);
guac_protocol_send_cfill(socket, GUAC_COMP_SRC, scrollbar->container,
0x40, 0x40, 0x40, 0xFF);
}
/* Reposition handle if moved */
if (old_state->handle_x != new_state.handle_x
|| old_state->handle_y != new_state.handle_y) {
guac_protocol_send_move(socket,
scrollbar->handle, scrollbar->container,
new_state.handle_x,
new_state.handle_y,
0);
}
/* Resize and redraw handle if size changed */
if (old_state->handle_width != new_state.handle_width
|| old_state->handle_height != new_state.handle_height) {
/* Send new size */
guac_protocol_send_size(socket, scrollbar->handle,
new_state.handle_width,
new_state.handle_height);
/* Fill and stroke handle with solid color */
guac_protocol_send_rect(socket, scrollbar->handle, 0, 0,
new_state.handle_width,
new_state.handle_height);
guac_protocol_send_cfill(socket, GUAC_COMP_SRC, scrollbar->handle,
0x80, 0x80, 0x80, 0xFF);
guac_protocol_send_cstroke(socket, GUAC_COMP_OVER, scrollbar->handle,
GUAC_LINE_CAP_SQUARE, GUAC_LINE_JOIN_MITER, 2,
0xA0, 0xA0, 0xA0, 0xFF);
}
/* Store current render state */
scrollbar->render_state = new_state;
}
guac_terminal_display* guac_terminal_display_alloc(guac_client* client,
const char* font_name, int font_size, int dpi,
int foreground, int background) {
PangoFontMap* font_map;
PangoFont* font;
PangoFontMetrics* metrics;
PangoContext* context;
/* Allocate display */
guac_terminal_display* display = malloc(sizeof(guac_terminal_display));
display->client = client;
/* Create default surface */
display->display_layer = guac_client_alloc_layer(client);
display->select_layer = guac_client_alloc_layer(client);
display->display_surface = guac_common_surface_alloc(client,
client->socket, display->display_layer, 0, 0);
/* Select layer is a child of the display layer */
guac_protocol_send_move(client->socket, display->select_layer,
display->display_layer, 0, 0, 0);
/* Get font */
display->font_desc = pango_font_description_new();
pango_font_description_set_family(display->font_desc, font_name);
pango_font_description_set_weight(display->font_desc, PANGO_WEIGHT_NORMAL);
pango_font_description_set_size(display->font_desc,
font_size * PANGO_SCALE * dpi / 96);
font_map = pango_cairo_font_map_get_default();
context = pango_font_map_create_context(font_map);
font = pango_font_map_load_font(font_map, context, display->font_desc);
if (font == NULL) {
guac_client_abort(display->client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Unable to get font \"%s\"", font_name);
return NULL;
}
metrics = pango_font_get_metrics(font, NULL);
if (metrics == NULL) {
guac_client_abort(display->client, GUAC_PROTOCOL_STATUS_SERVER_ERROR,
"Unable to get font metrics for font \"%s\"", font_name);
return NULL;
}
display->default_foreground = display->glyph_foreground = foreground;
display->default_background = display->glyph_background = background;
/* Calculate character dimensions */
display->char_width =
pango_font_metrics_get_approximate_digit_width(metrics) / PANGO_SCALE;
display->char_height =
(pango_font_metrics_get_descent(metrics)
+ pango_font_metrics_get_ascent(metrics)) / PANGO_SCALE;
/* Initially empty */
display->width = 0;
display->height = 0;
display->operations = NULL;
/* Initially nothing selected */
display->text_selected =
display->selection_committed = false;
return display;
}
