printing.cpp
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/*
* Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "printing.h"
#include "print_job.h"
namespace nfet {
extern std::unique_ptr<flutter::MethodChannel<flutter::EncodableValue>> channel;
Printing::Printing() {}
Printing::~Printing() {}
void Printing::onPageRasterized(std::vector<uint8_t> data,
int width,
int height,
PrintJob* job) {
channel->InvokeMethod(
"onPageRasterized",
std::make_unique<flutter::EncodableValue>(
flutter::EncodableValue(flutter::EncodableMap{
{flutter::EncodableValue("image"), flutter::EncodableValue(data)},
{flutter::EncodableValue("width"),
flutter::EncodableValue(width)},
{flutter::EncodableValue("height"),
flutter::EncodableValue(height)},
{flutter::EncodableValue("job"),
flutter::EncodableValue(job->id())},
})));
}
void Printing::onPageRasterEnd(PrintJob* job, const std::string& error) {
auto map = flutter::EncodableMap{
{flutter::EncodableValue("job"), flutter::EncodableValue(job->id())},
};
if (!error.empty()) {
map[flutter::EncodableValue("error")] = flutter::EncodableValue(error);
}
channel->InvokeMethod(
"onPageRasterEnd",
std::make_unique<flutter::EncodableValue>(flutter::EncodableValue(map)));
}
class OnLayoutResult : public flutter::MethodResult<flutter::EncodableValue> {
public:
OnLayoutResult(PrintJob* job) : job{job} {}
private:
PrintJob* job;
protected:
void SuccessInternal(const flutter::EncodableValue* result) {
auto doc = std::get<std::vector<uint8_t>>(*result);
job->writeJob(doc);
delete job;
}
void ErrorInternal(const std::string& error_code,
const std::string& error_message,
const flutter::EncodableValue* error_details) {
delete job;
}
void NotImplementedInternal() { delete job; }
};
void Printing::onLayout(PrintJob* job,
double pageWidth,
double pageHeight,
double marginLeft,
double marginTop,
double marginRight,
double marginBottom) {
channel->InvokeMethod("onLayout",
std::make_unique<flutter::EncodableValue>(
flutter::EncodableValue(flutter::EncodableMap{
{flutter::EncodableValue("job"),
flutter::EncodableValue(job->id())},
{flutter::EncodableValue("width"),
flutter::EncodableValue(pageWidth)},
{flutter::EncodableValue("height"),
flutter::EncodableValue(pageHeight)},
{flutter::EncodableValue("marginLeft"),
flutter::EncodableValue(marginLeft)},
{flutter::EncodableValue("marginTop"),
flutter::EncodableValue(marginTop)},
{flutter::EncodableValue("marginRight"),
flutter::EncodableValue(marginRight)},
{flutter::EncodableValue("marginBottom"),
flutter::EncodableValue(marginBottom)},
})),
std::make_unique<OnLayoutResult>(job));
}
// send completion status to flutter
void Printing::onCompleted(PrintJob* job,
bool completed,
const std::string& error) {
auto map = flutter::EncodableMap{
{flutter::EncodableValue("job"), flutter::EncodableValue(job->id())},
{flutter::EncodableValue("completed"),
flutter::EncodableValue(completed)},
};
if (!error.empty()) {
map[flutter::EncodableValue("error")] = flutter::EncodableValue(error);
}
channel->InvokeMethod(
"onCompleted",
std::make_unique<flutter::EncodableValue>(flutter::EncodableValue(map)));
}
} // namespace nfet