1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "AnimationParser.h"
18
19#include <android-base/stringprintf.h>
20#include <android-base/strings.h>
21
22#include <cutils/klog.h>
23
24#include "animation.h"
25
26#define LOGE(x...) do { KLOG_ERROR("charger", x); } while (0)
27#define LOGW(x...) do { KLOG_WARNING("charger", x); } while (0)
28#define LOGV(x...) do { KLOG_DEBUG("charger", x); } while (0)
29
30namespace android {
31
32// Lines consisting of only whitespace or whitespace followed by '#' can be ignored.
33bool can_ignore_line(const char* str) {
34    for (int i = 0; str[i] != '\0' && str[i] != '#'; i++) {
35        if (!isspace(str[i])) return false;
36    }
37    return true;
38}
39
40bool remove_prefix(const std::string& line, const char* prefix, const char** rest) {
41    const char* str = line.c_str();
42    int start;
43    char c;
44
45    std::string format = base::StringPrintf(" %s%%n%%c", prefix);
46    if (sscanf(str, format.c_str(), &start, &c) != 1) {
47        return false;
48    }
49
50    *rest = &str[start];
51    return true;
52}
53
54bool parse_text_field(const char* in, animation::text_field* field) {
55    int* x = &field->pos_x;
56    int* y = &field->pos_y;
57    int* r = &field->color_r;
58    int* g = &field->color_g;
59    int* b = &field->color_b;
60    int* a = &field->color_a;
61
62    int start = 0, end = 0;
63
64    if (sscanf(in, "c c %d %d %d %d %n%*s%n", r, g, b, a, &start, &end) == 4) {
65        *x = CENTER_VAL;
66        *y = CENTER_VAL;
67    } else if (sscanf(in, "c %d %d %d %d %d %n%*s%n", y, r, g, b, a, &start, &end) == 5) {
68        *x = CENTER_VAL;
69    } else if (sscanf(in, "%d c %d %d %d %d %n%*s%n", x, r, g, b, a, &start, &end) == 5) {
70        *y = CENTER_VAL;
71    } else if (sscanf(in, "%d %d %d %d %d %d %n%*s%n", x, y, r, g, b, a, &start, &end) != 6) {
72        return false;
73    }
74
75    if (end == 0) return false;
76
77    field->font_file.assign(&in[start], end - start);
78
79    return true;
80}
81
82bool parse_animation_desc(const std::string& content, animation* anim) {
83    static constexpr const char* animation_prefix = "animation: ";
84    static constexpr const char* fail_prefix = "fail: ";
85    static constexpr const char* clock_prefix = "clock_display: ";
86    static constexpr const char* percent_prefix = "percent_display: ";
87    static constexpr const char* frame_prefix = "frame: ";
88
89    std::vector<animation::frame> frames;
90
91    for (const auto& line : base::Split(content, "\n")) {
92        animation::frame frame;
93        const char* rest;
94
95        if (can_ignore_line(line.c_str())) {
96            continue;
97        } else if (remove_prefix(line, animation_prefix, &rest)) {
98            int start = 0, end = 0;
99            if (sscanf(rest, "%d %d %n%*s%n", &anim->num_cycles, &anim->first_frame_repeats,
100                    &start, &end) != 2 ||
101                end == 0) {
102                LOGE("Bad animation format: %s\n", line.c_str());
103                return false;
104            } else {
105                anim->animation_file.assign(&rest[start], end - start);
106            }
107        } else if (remove_prefix(line, fail_prefix, &rest)) {
108            anim->fail_file.assign(rest);
109        } else if (remove_prefix(line, clock_prefix, &rest)) {
110            if (!parse_text_field(rest, &anim->text_clock)) {
111                LOGE("Bad clock_display format: %s\n", line.c_str());
112                return false;
113            }
114        } else if (remove_prefix(line, percent_prefix, &rest)) {
115            if (!parse_text_field(rest, &anim->text_percent)) {
116                LOGE("Bad percent_display format: %s\n", line.c_str());
117                return false;
118            }
119        } else if (sscanf(line.c_str(), " frame: %d %d %d",
120                &frame.disp_time, &frame.min_level, &frame.max_level) == 3) {
121            frames.push_back(std::move(frame));
122        } else {
123            LOGE("Malformed animation description line: %s\n", line.c_str());
124            return false;
125        }
126    }
127
128    if (anim->animation_file.empty() || frames.empty()) {
129        LOGE("Bad animation description. Provide the 'animation: ' line and at least one 'frame: ' "
130             "line.\n");
131        return false;
132    }
133
134    anim->num_frames = frames.size();
135    anim->frames = new animation::frame[frames.size()];
136    std::copy(frames.begin(), frames.end(), anim->frames);
137
138    return true;
139}
140
141}  // namespace android
142