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add token replacement system

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fixes #212
This commit is contained in:
Konstantin Käfer
2014-05-30 21:05:25 +02:00
parent da29a16370
commit c5fd7a0cdd
2 changed files with 49 additions and 28 deletions
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39
src/map/tile_parser.cpp
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@@ -16,6 +16,8 @@
#include <llmr/util/std.hpp>
#include <llmr/util/utf.hpp>
#include <regex>
using namespace llmr;
TileParser::TileParser(const std::string &data, VectorTileData &tile,
@@ -182,6 +184,9 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer &laye
tile.textVertexBuffer, tile.triangleElementsBuffer, bucket_desc, placement);
util::utf8_to_utf32 ucs4conv;
std::regex token_regex("\\{\\{(\\w+)\\}\\}");
const auto tokens_end = std::sregex_token_iterator();
std::vector<std::pair<std::u32string, pbf>> labels;
@@ -195,18 +200,34 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer &laye
return nullptr;
VectorTileFeature feature{feature_pbf, layer};
auto it_prop = feature.properties.find(bucket_desc.geometry.field);
if (it_prop == feature.properties.end()) {
// feature does not have the correct property
if (debug::labelTextMissingWarning) {
fprintf(stderr,
"[WARNING] feature doesn't have property '%s' required for labelling\n",
bucket_desc.geometry.field.c_str());
const std::string &field = bucket_desc.geometry.field;
std::string source_string;
source_string.reserve(field.size());
bool token = false;
for (auto token_it = std::sregex_token_iterator(field.begin(), field.end(), token_regex, {-1, 1}); token_it != tokens_end; ++token_it, token = !token) {
if (!token_it->matched) {
continue;
}
if (token) {
auto it_prop = feature.properties.find(token_it->str());
if (it_prop == feature.properties.end()) {
// feature does not have the correct property
if (debug::labelTextMissingWarning) {
fprintf(stderr,
"[WARNING] feature doesn't have property '%s' required for labelling\n",
token_it->str().c_str());
}
continue;
}
source_string += toString(it_prop->second);
} else {
source_string += token_it->str();
}
continue;
}
const std::u32string string = ucs4conv.convert(toString(it_prop->second));
const std::u32string string = ucs4conv.convert(source_string);
// Loop through all characters of this text and collect unique codepoints.
for (uint32_t chr : string) {