tools/aapt/ResourceFilter.cpp

//
// Copyright 2011 The Android Open Source Project
//
// Build resource files from raw assets.
//

#include "ResourceFilter.h"

status_t
ResourceFilter::parse(const char* arg)
{
    if (arg == NULL) {
        return 0;
    }

    const char* p = arg;
    const char* q;

    while (true) {
        q = strchr(p, ',');
        if (q == NULL) {
            q = p + strlen(p);
        }

        String8 part(p, q-p);

        if (part == "en_XA") {
            mContainsPseudoAccented = true;
        } else if (part == "ar_XB") {
            mContainsPseudoBidi = true;
        }
        int axis;
        AxisValue value;
        if (!AaptGroupEntry::parseFilterNamePart(part, &axis, &value)) {
            fprintf(stderr, "Invalid configuration: %s\n", arg);
            fprintf(stderr, "                       ");
            for (int i=0; i<p-arg; i++) {
                fprintf(stderr, " ");
            }
            for (int i=0; i<q-p; i++) {
                fprintf(stderr, "^");
            }
            fprintf(stderr, "\n");
            return 1;
        }

        ssize_t index = mData.indexOfKey(axis);
        if (index < 0) {
            mData.add(axis, SortedVector<AxisValue>());
        }
        SortedVector<AxisValue>& sv = mData.editValueFor(axis);
        sv.add(value);

        // If it's a locale with a region, script or variant, we should also match an
        // unmodified locale of the same language
        if (axis == AXIS_LOCALE) {
            if (value.localeValue.region[0] || value.localeValue.script[0] ||
                value.localeValue.variant[0]) {
                AxisValue copy;
                memcpy(copy.localeValue.language, value.localeValue.language,
                       sizeof(value.localeValue.language));
                sv.add(copy);
            }
        }
        p = q;
        if (!*p) break;
        p++;
    }

    return NO_ERROR;
}

bool
ResourceFilter::isEmpty() const
{
    return mData.size() == 0;
}

bool
ResourceFilter::match(int axis, const AxisValue& value) const
{
    if (value.intValue == 0 && (value.localeValue.language[0] == 0)) {
        // they didn't specify anything so take everything
        return true;
    }
    ssize_t index = mData.indexOfKey(axis);
    if (index < 0) {
        // we didn't request anything on this axis so take everything
        return true;
    }
    const SortedVector<AxisValue>& sv = mData.valueAt(index);
    return sv.indexOf(value) >= 0;
}

bool
ResourceFilter::match(int axis, const ResTable_config& config) const
{
    return match(axis, AaptGroupEntry::getConfigValueForAxis(config, axis));
}

bool
ResourceFilter::match(const ResTable_config& config) const
{
    for (int i=AXIS_START; i<=AXIS_END; i++) {
        if (!match(i, AaptGroupEntry::getConfigValueForAxis(config, i))) {
            return false;
        }
    }
    return true;
}

const SortedVector<AxisValue>* ResourceFilter::configsForAxis(int axis) const
{
    ssize_t index = mData.indexOfKey(axis);
    if (index < 0) {
        return NULL;
    }
    return &mData.valueAt(index);
}