100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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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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