103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
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* Copyright (C) 2016 Glyptodon, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h"
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#include "display.h"
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#include "layer.h"
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#include "log.h"
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#include <guacamole/client.h>
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#include <stdlib.h>
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guacenc_layer* guacenc_display_get_layer(guacenc_display* display,
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int index) {
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/* Do not lookup / allocate if index is invalid */
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if (index < 0 || index > GUACENC_DISPLAY_MAX_LAYERS) {
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guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
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return NULL;
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}
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/* Lookup layer, allocating a new layer if necessary */
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guacenc_layer* layer = display->layers[index];
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if (layer == NULL) {
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/* Attempt to allocate layer */
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layer = guacenc_layer_alloc();
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if (layer == NULL) {
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guacenc_log(GUAC_LOG_WARNING, "Layer allocation failed");
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return NULL;
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}
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/* The default layer has no parent */
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if (index == 0)
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layer->parent_index = GUACENC_LAYER_NO_PARENT;
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/* Store layer within display for future retrieval / management */
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display->layers[index] = layer;
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}
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return layer;
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}
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int guacenc_display_get_depth(guacenc_display* display, guacenc_layer* layer) {
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/* Non-existent layers have a depth of 0 */
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if (layer == NULL)
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return 0;
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/* Layers with no parent have a depth of 0 */
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if (layer->parent_index == GUACENC_LAYER_NO_PARENT)
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return 0;
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/* Retrieve parent layer */
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guacenc_layer* parent =
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guacenc_display_get_layer(display, layer->parent_index);
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/* Current layer depth is the depth of the parent + 1 */
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return guacenc_display_get_depth(display, parent) + 1;
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}
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int guacenc_display_free_layer(guacenc_display* display,
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int index) {
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/* Do not lookup / free if index is invalid */
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if (index < 0 || index > GUACENC_DISPLAY_MAX_LAYERS) {
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guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
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return 1;
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}
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/* Free layer (if allocated) */
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guacenc_layer_free(display->layers[index]);
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/* Mark layer as freed */
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display->layers[index] = NULL;
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return 0;
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}
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