ResourceFilter.cpp revision a2bb565db553e3def89a6e010b59f2fd1db98ff4
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        // Ignore any densities. Those are best handled in --preferred-density
45        if ((entry.second & ResTable_config::CONFIG_DENSITY) != 0) {
46            fprintf(stderr, "warning: ignoring flag -c %s. Use --preferred-density instead.\n", entry.first.toString().string());
47            entry.first.density = 0;
48            entry.second &= ~ResTable_config::CONFIG_DENSITY;
49        }
50
51        mConfigMask |= entry.second;
52    }
53
54    return NO_ERROR;
55}
56
57bool
58WeakResourceFilter::match(const ResTable_config& config) const
59{
60    uint32_t mask = mDefault.diff(config);
61    if ((mConfigMask & mask) == 0) {
62        // The two configurations don't have any common axis.
63        return true;
64    }
65
66    uint32_t matchedAxis = 0x0;
67    const size_t N = mConfigs.size();
68    for (size_t i = 0; i < N; i++) {
69        const std::pair<ConfigDescription, uint32_t>& entry = mConfigs[i];
70        uint32_t diff = entry.first.diff(config);
71        if ((diff & entry.second) == 0) {
72            // Mark the axis that was matched.
73            matchedAxis |= entry.second;
74        } else if ((diff & entry.second) == ResTable_config::CONFIG_LOCALE) {
75            // If the locales differ, but the languages are the same and
76            // the locale we are matching only has a language specified,
77            // we match.
78            if (config.language[0] &&
79                    memcmp(config.language, entry.first.language, sizeof(config.language)) == 0) {
80                if (config.country[0] == 0) {
81                    matchedAxis |= ResTable_config::CONFIG_LOCALE;
82                }
83            }
84        } else if ((diff & entry.second) == ResTable_config::CONFIG_SMALLEST_SCREEN_SIZE) {
85            // Special case if the smallest screen width doesn't match. We check that the
86            // config being matched has a smaller screen width than the filter specified.
87            if (config.smallestScreenWidthDp != 0 &&
88                    config.smallestScreenWidthDp < entry.first.smallestScreenWidthDp) {
89                matchedAxis |= ResTable_config::CONFIG_SMALLEST_SCREEN_SIZE;
90            }
91        }
92    }
93    return matchedAxis == (mConfigMask & mask);
94}
95
96status_t
97StrongResourceFilter::parse(const String8& str) {
98    Vector<String8> configStrs = AaptUtil::split(str, ',');
99    ConfigDescription config;
100    mConfigs.clear();
101    for (size_t i = 0; i < configStrs.size(); i++) {
102        if (!AaptConfig::parse(configStrs[i], &config)) {
103            fprintf(stderr, "Invalid configuration: %s\n", configStrs[i].string());
104            return UNKNOWN_ERROR;
105        }
106        mConfigs.insert(config);
107    }
108    return NO_ERROR;
109}
110