ResourceFilter.cpp revision a5cc002bfe7ca8a6536549189b44e7143c8611dc 
1//
2// Copyright 2014 The Android Open Source Project
3//
4// Build resource files from raw assets.
5//
6
7#include "ResourceFilter.h"
8#include "AaptUtil.h"
9#include "AaptConfig.h"
10
11status_t
12WeakResourceFilter::parse(const String8& str)
13{
14    Vector<String8> configStrs = AaptUtil::split(str, ',');
15    const size_t N = configStrs.size();
16    mConfigs.clear();
17    mConfigMask = 0;
18    mConfigs.resize(N);
19    for (size_t i = 0; i < N; i++) {
20        const String8& part = configStrs[i];
21        if (part == "en_XA") {
22            mContainsPseudoAccented = true;
23        } else if (part == "ar_XB") {
24            mContainsPseudoBidi = true;
25        }
26
27        std::pair<ConfigDescription, uint32_t>& entry = mConfigs.editItemAt(i);
28
29        AaptLocaleValue val;
30        if (val.initFromFilterString(part)) {
31            // For backwards compatibility, we accept configurations that
32            // only specify locale in the standard 'en_US' format.
33            val.writeTo(&entry.first);
34        } else if (!AaptConfig::parse(part, &entry.first)) {
35            fprintf(stderr, "Invalid configuration: %s\n", part.string());
36            return UNKNOWN_ERROR;
37        }
38
39        entry.second = mDefault.diff(entry.first);
40
41        // Ignore the version
42        entry.second &= ~ResTable_config::CONFIG_VERSION;
43
44        mConfigMask |= entry.second;
45    }
46
47    return NO_ERROR;
48}
49
50bool
51WeakResourceFilter::match(const ResTable_config& config) const
52{
53    uint32_t mask = mDefault.diff(config);
54    if ((mConfigMask & mask) == 0) {
55        // The two configurations don't have any common axis.
56        return true;
57    }
58
59    uint32_t matchedAxis = 0x0;
60    const size_t N = mConfigs.size();
61    for (size_t i = 0; i < N; i++) {
62        const std::pair<ConfigDescription, uint32_t>& entry = mConfigs[i];
63        uint32_t diff = entry.first.diff(config);
64        if ((diff & entry.second) == 0) {
65            // Mark the axis that was matched.
66            matchedAxis |= entry.second;
67        } else if ((diff & entry.second) == ResTable_config::CONFIG_LOCALE) {
68            // If the locales differ, but the languages are the same and
69            // the locale we are matching only has a language specified,
70            // we match.
71            if (config.language[0] &&
72                    memcmp(config.language, entry.first.language, sizeof(config.language)) == 0) {
73                if (config.country[0] == 0) {
74                    matchedAxis |= ResTable_config::CONFIG_LOCALE;
75                }
76            }
77        } else if ((diff & entry.second) == ResTable_config::CONFIG_SMALLEST_SCREEN_SIZE) {
78            // Special case if the smallest screen width doesn't match. We check that the
79            // config being matched has a smaller screen width than the filter specified.
80            if (config.smallestScreenWidthDp != 0 &&
81                    config.smallestScreenWidthDp < entry.first.smallestScreenWidthDp) {
82                matchedAxis |= ResTable_config::CONFIG_SMALLEST_SCREEN_SIZE;
83            }
84        }
85    }
86    return matchedAxis == (mConfigMask & mask);
87}
88
89status_t
90StrongResourceFilter::parse(const String8& str) {
91    Vector<String8> configStrs = AaptUtil::split(str, ',');
92    ConfigDescription config;
93    mConfigs.clear();
94    for (size_t i = 0; i < configStrs.size(); i++) {
95        if (!AaptConfig::parse(configStrs[i], &config)) {
96            fprintf(stderr, "Invalid configuration: %s\n", configStrs[i].string());
97            return UNKNOWN_ERROR;
98        }
99        mConfigs.insert(config);
100    }
101    return NO_ERROR;
102}
103