Aegisub/aegisub/libaegisub/common/progress.cpp

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// Copyright (c) 2011, Niels Martin Hansen <nielsm@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// $Id$
/// @file progress.cpp
/// @brief Progress bars.
/// @ingroup libaegisub
#ifndef LAG_PRE
#include <string>
#endif
#include "libaegisub/progress.h"
namespace agi {
class NullProgressSink : public ProgressSink {
public:
virtual void set_progress(int steps, int max) { }
virtual void set_operation(const std::string &operation) { }
virtual bool get_cancelled() const { return false; }
};
ProgressSink * NullProgressSinkFactory::create_progress_sink(const std::string &title) const {
return new NullProgressSink;
}
class StdioProgressSink : public ProgressSink {
private:
FILE *file;
std::string operation;
float progress;
void print();
public:
StdioProgressSink(FILE *file, const std::string &title);
virtual ~StdioProgressSink();
virtual void set_progress(int steps, int max);
virtual void set_operation(const std::string &operation);
virtual bool get_cancelled() const { return false; } // or maybe see if there is an ESC waiting or get a ^C sent flag
};
ProgressSink * StdioProgressSinkFactory::create_progress_sink(const std::string &title) const {
return new StdioProgressSink(file, title);
}
StdioProgressSink::StdioProgressSink(FILE *file, const std::string &title)
: file(file)
, operation(title)
, progress(0) {
fprintf(file, "=== %s ===\n", title.c_str());
print();
}
StdioProgressSink::~StdioProgressSink()
{
fprintf(file, "\n -===-\n");
}
void StdioProgressSink::set_progress(int steps, int max) {
assert(steps >= 0);
assert(steps <= max);
float old_progress = progress;
progress = (100.f * steps)/max;
if (fabs(progress-old_progress) > 0.8)
{
print();
}
}
void StdioProgressSink::set_operation(const std::string &operation) {
this->operation = operation;
print();
}
void StdioProgressSink::print() {
fprintf(file, "%s: %.1f%%\r", operation.c_str(), progress);
}
} // namespace agi