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QPDFJob_json: add code to register handlers
This commit is contained in:
Jay Berkenbilt
parent
967a2b9f28
commit
842a9d928e
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@ -1,9 +1,11 @@
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#include <qpdf/QPDFJob.hh>
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#include <qpdf/JSONHandler.hh>
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#include <qpdf/QPDFUsage.hh>
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#include <memory>
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#include <stdexcept>
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#include <sstream>
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#include <cstring>
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static JSON JOB_SCHEMA = JSON::parse(QPDFJob::json_job_schema_v1().c_str());
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@ -21,7 +23,22 @@ namespace
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void usage(std::string const& message);
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void initHandlers();
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JSONHandler jh;
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typedef std::function<void()> bare_arg_handler_t;
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typedef std::function<void(char const*)> param_arg_handler_t;
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void addBare(std::string const& key, bare_arg_handler_t);
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void addParameter(std::string const& key, bool required,
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param_arg_handler_t);
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void addChoices(std::string const& key,
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bool required, char const** choices,
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param_arg_handler_t);
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void beginDict(std::string const& key,
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bare_arg_handler_t start_fn,
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bare_arg_handler_t end_fn);
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void endDict();
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std::list<std::shared_ptr<JSONHandler>> json_handlers;
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JSONHandler* jh; // points to last of json_handlers
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std::shared_ptr<QPDFJob::Config> c_main;
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std::shared_ptr<QPDFJob::CopyAttConfig> c_copy_att;
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std::shared_ptr<QPDFJob::AttConfig> c_att;
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@ -32,72 +49,175 @@ namespace
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}
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Handlers::Handlers(std::shared_ptr<QPDFJob::Config> c_main) :
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jh(nullptr),
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c_main(c_main)
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{
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initHandlers();
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}
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void
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Handlers::usage(std::string const& message)
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{
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throw QPDFUsage(message);
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}
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void
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Handlers::initHandlers()
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{
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# include <qpdf/auto_job_json_init.hh>
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jh.addDictHandlers(
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this->json_handlers.push_back(std::make_shared<JSONHandler>());
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this->jh = this->json_handlers.back().get();
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jh->addDictHandlers(
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[](std::string const&){},
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[this](std::string const&){c_main->checkConfiguration();});
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auto input = std::make_shared<JSONHandler>();
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auto input_file = std::make_shared<JSONHandler>();
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auto input_file_name = std::make_shared<JSONHandler>();
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auto output = std::make_shared<JSONHandler>();
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auto output_file = std::make_shared<JSONHandler>();
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auto output_file_name = std::make_shared<JSONHandler>();
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auto output_options = std::make_shared<JSONHandler>();
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auto output_options_qdf = std::make_shared<JSONHandler>();
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# include <qpdf/auto_job_json_init.hh>
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input->addDictHandlers(
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[](std::string const&){},
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[](std::string const&){});
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input_file->addDictHandlers(
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[](std::string const&){},
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[](std::string const&){});
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output->addDictHandlers(
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[](std::string const&){},
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[](std::string const&){});
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output_file->addDictHandlers(
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[](std::string const&){},
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[](std::string const&){});
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output_options->addDictHandlers(
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[](std::string const&){},
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[](std::string const&){});
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// QXXXQ
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auto empty = [](){};
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beginDict("input", empty, empty);
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beginDict("file", empty, empty);
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addParameter("name", true, [this](char const* p) {
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c_main->inputFile(p);
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});
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endDict(); // input.file
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endDict(); // input
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beginDict("output", empty, empty);
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beginDict("file", empty, empty);
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addParameter("name", true, [this](char const* p) {
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c_main->outputFile(p);
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});
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endDict(); // output.file
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beginDict("options", empty, empty);
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addBare("qdf", [this]() {
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c_main->qdf();
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});
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char const* choices[] = {"disable", "preserve", "generate", 0};
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addChoices("objectStreams", true, choices, [this](char const* p) {
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c_main->objectStreams(p);
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});
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endDict(); // output.options
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endDict(); // output
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// /QXXXQ
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jh.addDictKeyHandler("input", input);
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input->addDictKeyHandler("file", input_file);
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input_file->addDictKeyHandler("name", input_file_name);
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jh.addDictKeyHandler("output", output);
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output->addDictKeyHandler("file", output_file);
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output_file->addDictKeyHandler("name", output_file_name);
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output->addDictKeyHandler("options", output_options);
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output_options->addDictKeyHandler("qdf", output_options_qdf);
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if (this->json_handlers.size() != 1)
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{
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throw std::logic_error("QPDFJob_json: json_handlers size != 1 at end");
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}
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}
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input_file_name->addStringHandler(
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[this](std::string const&, std::string const& v) {
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c_main->inputFile(v.c_str());
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void
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Handlers::addBare(std::string const& key, bare_arg_handler_t fn)
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{
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auto h = std::make_shared<JSONHandler>();
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h->addBoolHandler([this, fn](std::string const& path, bool v){
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if (! v)
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{
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usage(path + ": value must be true");
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}
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else
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{
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fn();
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}
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});
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jh->addDictKeyHandler(key, h);
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}
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void
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Handlers::addParameter(std::string const& key,
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bool required,
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param_arg_handler_t fn)
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{
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auto h = std::make_shared<JSONHandler>();
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h->addStringHandler(
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[fn](std::string const& path, std::string const& parameter){
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fn(parameter.c_str());
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});
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output_file_name->addStringHandler(
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[this](std::string const&, std::string const& v) {
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c_main->outputFile(v.c_str());
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});
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output_options_qdf->addBoolHandler(
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[this](std::string const&, bool v) {
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// QXXXQ require v to be true
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c_main->qdf();
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if (! required)
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{
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h->addNullHandler(
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[fn](std::string const& path){
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fn(nullptr);
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});
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}
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jh->addDictKeyHandler(key, h);
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}
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void
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Handlers::addChoices(std::string const& key,
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bool required, char const** choices,
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param_arg_handler_t fn)
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{
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auto h = std::make_shared<JSONHandler>();
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h->addStringHandler(
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[fn, choices, this](
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std::string const& path, std::string const& parameter){
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char const* p = parameter.c_str();
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bool matches = false;
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for (char const** i = choices; *i; ++i)
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{
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if (strcmp(*i, p) == 0)
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{
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matches = true;
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break;
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}
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}
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if (! matches)
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{
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std::ostringstream msg;
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msg << path + ": unexpected value; expected one of ";
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bool first = true;
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for (char const** i = choices; *i; ++i)
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{
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if (first)
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{
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first = false;
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}
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else
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{
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msg << ", ";
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}
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msg << *i;
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}
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usage(msg.str());
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}
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fn(parameter.c_str());
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});
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if (! required)
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{
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h->addNullHandler(
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[fn](std::string const& path){
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fn(nullptr);
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});
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}
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jh->addDictKeyHandler(key, h);
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}
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void
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Handlers::beginDict(std::string const& key,
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bare_arg_handler_t start_fn,
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bare_arg_handler_t end_fn)
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{
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auto new_jh = std::make_shared<JSONHandler>();
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new_jh->addDictHandlers(
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[start_fn](std::string const&){ start_fn(); },
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[end_fn](std::string const&){ end_fn(); });
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this->jh->addDictKeyHandler(key, new_jh);
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this->json_handlers.push_back(new_jh);
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this->jh = new_jh.get();
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}
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void
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Handlers::endDict()
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{
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this->json_handlers.pop_back();
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this->jh = this->json_handlers.back().get();
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}
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void
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Handlers::handle(JSON& j)
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{
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jh.handle(".", j);
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this->json_handlers.back()->handle(".", j);
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}
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void
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