GUAC-803: Separate scrollbar graphical update from state update.
This commit is contained in:
parent
1218a18bf4
commit
0f4e45e39d
@ -51,6 +51,18 @@ guac_terminal_scrollbar* guac_terminal_scrollbar_alloc(guac_client* client,
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scrollbar->parent_height = 0;
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scrollbar->parent_height = 0;
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scrollbar->visible_area = 0;
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scrollbar->visible_area = 0;
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/* Init handle render state */
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scrollbar->render_state.handle_x = 0;
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scrollbar->render_state.handle_y = 0;
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scrollbar->render_state.handle_width = 0;
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scrollbar->render_state.handle_height = 0;
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/* Init container render state */
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scrollbar->render_state.container_x = 0;
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scrollbar->render_state.container_y = 0;
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scrollbar->render_state.container_width = 0;
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scrollbar->render_state.container_height = 0;
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/* Allocate and init layers */
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/* Allocate and init layers */
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scrollbar->container = guac_client_alloc_layer(client);
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scrollbar->container = guac_client_alloc_layer(client);
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scrollbar->handle = guac_client_alloc_layer(client);
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scrollbar->handle = guac_client_alloc_layer(client);
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@ -75,53 +87,155 @@ void guac_terminal_scrollbar_free(guac_terminal_scrollbar* scrollbar) {
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}
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}
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/**
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/**
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* Updates the position and size of the scrollbar handle relative to the
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* Calculates the render state of the scroll bar, given its minimum, maximum,
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* current scrollbar value, bounds, and parent layer dimensions.
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* and current values. This render state will not be reflected graphically
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* unless the scrollbar is flushed.
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*
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*
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* @param scrollbar
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* @param scrollbar
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* The scrollbar whose handle should be updated.
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* The scrollbar whose render state should be calculated.
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*
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* @param render_state
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* A pointer to an existing guac_terminal_scrollbar_render_state that will
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* be populated with the calculated result.
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*/
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*/
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static void __update_handle(guac_terminal_scrollbar* scrollbar) {
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static void calculate_render_state(guac_terminal_scrollbar* scrollbar,
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guac_terminal_scrollbar_render_state* render_state) {
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/* Calculate container dimensions */
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render_state->container_width = GUAC_TERMINAL_SCROLLBAR_WIDTH;
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render_state->container_height = scrollbar->parent_height;
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/* Calculate container position */
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render_state->container_x = scrollbar->parent_width
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- render_state->container_width;
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render_state->container_y = 0;
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/* Calculate handle dimensions */
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render_state->handle_width = render_state->container_width
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- GUAC_TERMINAL_SCROLLBAR_PADDING*2;
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/* Handle can be no bigger than the scrollbar itself */
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int max_handle_height = render_state->container_height
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- GUAC_TERMINAL_SCROLLBAR_PADDING*2;
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/* Calculate legal delta between scroll values */
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int scroll_delta;
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if (scrollbar->max > scrollbar->min)
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scroll_delta = scrollbar->max - scrollbar->min;
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else
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scroll_delta = 0;
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/* Scale handle relative to visible area vs. scrolling region size */
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int proportional_height = max_handle_height
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* scrollbar->visible_area
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/ (scroll_delta + scrollbar->visible_area);
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/* Ensure handle is no smaller than minimum height */
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if (proportional_height > GUAC_TERMINAL_SCROLLBAR_MIN_HEIGHT)
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render_state->handle_height = proportional_height;
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else
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render_state->handle_height = GUAC_TERMINAL_SCROLLBAR_MIN_HEIGHT;
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/* Ensure handle is no larger than maximum height */
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if (render_state->handle_height > max_handle_height)
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render_state->handle_height = max_handle_height;
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/* Calculate handle position */
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render_state->handle_x = GUAC_TERMINAL_SCROLLBAR_PADDING;
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/* Handle Y position is relative to current scroll value */
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if (scroll_delta > 0)
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render_state->handle_y = GUAC_TERMINAL_SCROLLBAR_PADDING
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+ (max_handle_height - render_state->handle_height)
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* (scrollbar->value - scrollbar->min)
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/ scroll_delta;
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/* ... unless there is only one possible scroll value */
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else
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render_state->handle_y = GUAC_TERMINAL_SCROLLBAR_PADDING;
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}
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void guac_terminal_scrollbar_flush(guac_terminal_scrollbar* scrollbar) {
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guac_socket* socket = scrollbar->client->socket;
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guac_socket* socket = scrollbar->client->socket;
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/* Skip if no scrolling region at all */
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/* Get old render state */
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if (scrollbar->min >= scrollbar->max)
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guac_terminal_scrollbar_render_state* old_state = &scrollbar->render_state;
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return;
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int region_size = scrollbar->max - scrollbar->min;
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/* Calculate new render state */
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guac_terminal_scrollbar_render_state new_state;
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calculate_render_state(scrollbar, &new_state);
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/* Calculate handle dimensions */
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/* Reposition container if moved */
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int handle_width = GUAC_TERMINAL_SCROLLBAR_WIDTH - GUAC_TERMINAL_SCROLLBAR_PADDING*2;
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if (old_state->container_x != new_state.container_x
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int handle_height = GUAC_TERMINAL_SCROLLBAR_MIN_HEIGHT;
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|| old_state->container_y != new_state.container_y) {
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/* Size handle relative to visible area */
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guac_protocol_send_move(socket,
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int padded_container_height = (scrollbar->parent_height - GUAC_TERMINAL_SCROLLBAR_PADDING*2);
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scrollbar->container, scrollbar->parent,
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int proportional_height = padded_container_height * scrollbar->visible_area / (region_size + scrollbar->visible_area);
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new_state.container_x,
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if (proportional_height > handle_height)
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new_state.container_y,
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handle_height = proportional_height;
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0);
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/* Calculate handle position and dimensions */
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}
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int handle_x = GUAC_TERMINAL_SCROLLBAR_PADDING;
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int handle_y = GUAC_TERMINAL_SCROLLBAR_PADDING
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+ (padded_container_height - handle_height) * (scrollbar->value - scrollbar->min) / region_size;
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/* Reposition handle relative to container and current value */
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/* Resize and redraw container if size changed */
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guac_protocol_send_move(socket,
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if (old_state->container_width != new_state.container_width
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scrollbar->handle, scrollbar->container,
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|| old_state->container_height != new_state.container_height) {
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handle_x, handle_y, 0);
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/* Resize handle relative to scrollable area */
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/* Set new size */
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guac_protocol_send_size(socket, scrollbar->handle,
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guac_protocol_send_size(socket, scrollbar->container,
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handle_width, handle_height);
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new_state.container_width,
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new_state.container_height);
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/* Fill handle with solid color */
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/* Fill container with solid color */
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guac_protocol_send_rect(socket, scrollbar->handle, 0, 0, handle_width, handle_height);
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guac_protocol_send_rect(socket, scrollbar->container, 0, 0,
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guac_protocol_send_cfill(socket, GUAC_COMP_SRC, scrollbar->handle,
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new_state.container_width,
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0x80, 0x80, 0x80, 0xFF);
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new_state.container_height);
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guac_protocol_send_cstroke(socket, GUAC_COMP_OVER, scrollbar->handle,
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GUAC_LINE_CAP_SQUARE, GUAC_LINE_JOIN_MITER, 2,
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guac_protocol_send_cfill(socket, GUAC_COMP_SRC, scrollbar->container,
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0xA0, 0xA0, 0xA0, 0xFF);
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0x40, 0x40, 0x40, 0xFF);
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}
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/* Reposition handle if moved */
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if (old_state->handle_x != new_state.handle_x
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|| old_state->handle_y != new_state.handle_y) {
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guac_protocol_send_move(socket,
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scrollbar->handle, scrollbar->container,
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new_state.handle_x,
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new_state.handle_y,
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0);
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}
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/* Resize and redraw handle if size changed */
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if (old_state->handle_width != new_state.handle_width
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|| old_state->handle_height != new_state.handle_height) {
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/* Send new size */
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guac_protocol_send_size(socket, scrollbar->handle,
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new_state.handle_width,
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new_state.handle_height);
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/* Fill and stroke handle with solid color */
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guac_protocol_send_rect(socket, scrollbar->handle, 0, 0,
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new_state.handle_width,
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new_state.handle_height);
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guac_protocol_send_cfill(socket, GUAC_COMP_SRC, scrollbar->handle,
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0x80, 0x80, 0x80, 0xFF);
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guac_protocol_send_cstroke(socket, GUAC_COMP_OVER, scrollbar->handle,
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GUAC_LINE_CAP_SQUARE, GUAC_LINE_JOIN_MITER, 2,
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0xA0, 0xA0, 0xA0, 0xFF);
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}
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/* Store current render state */
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scrollbar->render_state = new_state;
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}
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}
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@ -138,9 +252,6 @@ void guac_terminal_scrollbar_set_bounds(guac_terminal_scrollbar* scrollbar,
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scrollbar->min = min;
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scrollbar->min = min;
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scrollbar->max = max;
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scrollbar->max = max;
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/* Update handle position and size */
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__update_handle(scrollbar);
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}
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}
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void guac_terminal_scrollbar_set_value(guac_terminal_scrollbar* scrollbar,
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void guac_terminal_scrollbar_set_value(guac_terminal_scrollbar* scrollbar,
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@ -155,44 +266,15 @@ void guac_terminal_scrollbar_set_value(guac_terminal_scrollbar* scrollbar,
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/* Update value */
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/* Update value */
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scrollbar->value = value;
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scrollbar->value = value;
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/* Update handle position and size */
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__update_handle(scrollbar);
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}
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}
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void guac_terminal_scrollbar_parent_resized(guac_terminal_scrollbar* scrollbar,
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void guac_terminal_scrollbar_parent_resized(guac_terminal_scrollbar* scrollbar,
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int parent_width, int parent_height, int visible_area) {
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int parent_width, int parent_height, int visible_area) {
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guac_socket* socket = scrollbar->client->socket;
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/* Calculate container position and dimensions */
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int container_x = parent_width - GUAC_TERMINAL_SCROLLBAR_WIDTH;
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int container_y = 0;
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int container_width = GUAC_TERMINAL_SCROLLBAR_WIDTH;
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int container_height = parent_height;
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/* Reposition container relative to parent dimensions */
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guac_protocol_send_move(socket,
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scrollbar->container, scrollbar->parent,
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container_x, container_y, 0);
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/* Resize to fit within parent */
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guac_protocol_send_size(socket, scrollbar->container,
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container_width, container_height);
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/* Fill container with solid color */
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guac_protocol_send_rect(socket, scrollbar->container, 0, 0,
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container_width, container_height);
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guac_protocol_send_cfill(socket, GUAC_COMP_SRC, scrollbar->container,
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0x40, 0x40, 0x40, 0xFF);
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/* Assign new dimensions */
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/* Assign new dimensions */
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scrollbar->parent_width = parent_width;
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scrollbar->parent_width = parent_width;
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scrollbar->parent_height = parent_height;
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scrollbar->parent_height = parent_height;
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scrollbar->visible_area = visible_area;
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scrollbar->visible_area = visible_area;
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/* Update handle position and size */
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__update_handle(scrollbar);
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}
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}
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@ -44,6 +44,58 @@
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*/
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*/
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#define GUAC_TERMINAL_SCROLLBAR_MIN_HEIGHT 64
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#define GUAC_TERMINAL_SCROLLBAR_MIN_HEIGHT 64
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/**
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* The state of all scrollbar components, describing all variable aspects of
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* the scrollbar's appearance.
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*/
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typedef struct guac_terminal_scrollbar_render_state {
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/**
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* The current X-coordinate of the upper-left corner of the scrollbar's
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* handle. This value will be relative to the scrollbar's containing layer.
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*/
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int handle_x;
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/**
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* The current Y-coordinate of the upper-left corner of the scrollbar's
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* handle. This value will be relative to the scrollbar's containing layer.
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*/
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int handle_y;
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/**
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* The width of the scrollbar's handle.
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*/
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int handle_width;
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/**
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* The height of the scrollbar's handle.
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*/
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int handle_height;
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/**
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* The current X-coordinate of the upper-left corner of the scrollbar's
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* containing layer.
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*/
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int container_x;
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/**
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* The current Y-coordinate of the upper-left corner of the scrollbar's
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* containing layer.
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*/
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int container_y;
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/**
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* The width of the scrollbar's containing layer.
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*/
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int container_width;
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/**
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* The height of the scrollbar's containing layer.
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*/
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int container_height;
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} guac_terminal_scrollbar_render_state;
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/**
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/**
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* A scrollbar, made up of a containing layer and inner draggable handle. The
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* A scrollbar, made up of a containing layer and inner draggable handle. The
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* position of the handle within the layer represents the value of the
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* position of the handle within the layer represents the value of the
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@ -102,6 +154,11 @@ typedef struct guac_terminal_scrollbar {
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*/
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*/
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int value;
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int value;
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/**
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* The current state of all variable, visible parts of the scrollbar.
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*/
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guac_terminal_scrollbar_render_state render_state;
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} guac_terminal_scrollbar;
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} guac_terminal_scrollbar;
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/**
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/**
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@ -145,6 +202,18 @@ guac_terminal_scrollbar* guac_terminal_scrollbar_alloc(guac_client* client,
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*/
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*/
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void guac_terminal_scrollbar_free(guac_terminal_scrollbar* scrollbar);
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void guac_terminal_scrollbar_free(guac_terminal_scrollbar* scrollbar);
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/**
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* Flushes the render state of the given scrollbar, updating the remote display
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* accordingly.
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*
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* This may cause instructions to be written to the client's socket, but the
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* client's socket will not be automatically flushed.
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*
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* @param scrollbar
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* The scrollbar whose render state is to be flushed.
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*/
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void guac_terminal_scrollbar_flush(guac_terminal_scrollbar* scrollbar);
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/**
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/**
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* Sets the minimum and maximum allowed scroll values of the given scrollbar
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* Sets the minimum and maximum allowed scroll values of the given scrollbar
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* to the given values. If necessary, the current value of the scrollbar will
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* to the given values. If necessary, the current value of the scrollbar will
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@ -682,6 +682,8 @@ void guac_terminal_scroll_display_down(guac_terminal* terminal,
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}
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}
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guac_terminal_display_flush(terminal->display);
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guac_terminal_display_flush(terminal->display);
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guac_terminal_scrollbar_flush(terminal->scrollbar);
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guac_protocol_send_sync(terminal->client->socket,
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guac_protocol_send_sync(terminal->client->socket,
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terminal->client->last_sent_timestamp);
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terminal->client->last_sent_timestamp);
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guac_socket_flush(terminal->client->socket);
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guac_socket_flush(terminal->client->socket);
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@ -747,6 +749,8 @@ void guac_terminal_scroll_display_up(guac_terminal* terminal,
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}
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}
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guac_terminal_display_flush(terminal->display);
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guac_terminal_display_flush(terminal->display);
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guac_terminal_scrollbar_flush(terminal->scrollbar);
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guac_protocol_send_sync(terminal->client->socket,
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guac_protocol_send_sync(terminal->client->socket,
|
||||||
terminal->client->last_sent_timestamp);
|
terminal->client->last_sent_timestamp);
|
||||||
guac_socket_flush(terminal->client->socket);
|
guac_socket_flush(terminal->client->socket);
|
||||||
@ -1170,6 +1174,7 @@ int guac_terminal_resize(guac_terminal* terminal, int width, int height) {
|
|||||||
|
|
||||||
/* If terminal size hasn't changed, still need to flush */
|
/* If terminal size hasn't changed, still need to flush */
|
||||||
else {
|
else {
|
||||||
|
guac_terminal_scrollbar_flush(terminal->scrollbar);
|
||||||
guac_protocol_send_sync(socket, client->last_sent_timestamp);
|
guac_protocol_send_sync(socket, client->last_sent_timestamp);
|
||||||
guac_socket_flush(socket);
|
guac_socket_flush(socket);
|
||||||
}
|
}
|
||||||
@ -1181,6 +1186,7 @@ int guac_terminal_resize(guac_terminal* terminal, int width, int height) {
|
|||||||
void guac_terminal_flush(guac_terminal* terminal) {
|
void guac_terminal_flush(guac_terminal* terminal) {
|
||||||
guac_terminal_commit_cursor(terminal);
|
guac_terminal_commit_cursor(terminal);
|
||||||
guac_terminal_display_flush(terminal->display);
|
guac_terminal_display_flush(terminal->display);
|
||||||
|
guac_terminal_scrollbar_flush(terminal->scrollbar);
|
||||||
}
|
}
|
||||||
|
|
||||||
void guac_terminal_lock(guac_terminal* terminal) {
|
void guac_terminal_lock(guac_terminal* terminal) {
|
||||||
|
Loading…
Reference in New Issue
Block a user