89 lines
2.5 KiB
C++
89 lines
2.5 KiB
C++
#include "buffer_utils.hh"
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#include "event_manager.hh"
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#include <sys/select.h>
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namespace Kakoune
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{
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CharCount get_column(const Buffer& buffer,
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CharCount tabstop, ByteCoord coord)
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{
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auto& line = buffer[coord.line];
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auto col = 0_char;
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for (auto it = line.begin();
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it != line.end() and coord.column > (int)(it - line.begin());
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it = utf8::next(it, line.end()))
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{
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if (*it == '\t')
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col = (col / tabstop + 1) * tabstop;
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else
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++col;
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}
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return col;
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}
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Buffer* create_fifo_buffer(String name, int fd, bool scroll)
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{
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Buffer* buffer = new Buffer(std::move(name), Buffer::Flags::Fifo | Buffer::Flags::NoUndo);
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auto watcher = new FDWatcher(fd, [buffer, scroll](FDWatcher& watcher) {
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constexpr size_t buffer_size = 2048;
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char data[buffer_size];
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const int fifo = watcher.fd();
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timeval tv{ 0, 0 };
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fd_set rfds;
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ssize_t count = 0;
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do
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{
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count = read(fifo, data, buffer_size);
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auto pos = buffer->end()-1;
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bool prevent_scrolling = pos == buffer->begin() and not scroll;
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if (prevent_scrolling)
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++pos;
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buffer->insert(pos, String(data, data+count));
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if (count > 0 and prevent_scrolling)
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{
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buffer->erase(buffer->begin(), buffer->begin()+1);
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// in the other case, the buffer will have automatically
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// inserted a \n to guarantee its invariant.
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if (data[count-1] == '\n')
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buffer->insert(buffer->end(), "\n");
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}
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FD_ZERO(&rfds);
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FD_SET(fifo, &rfds);
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}
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while (count > 0 and select(fifo+1, &rfds, nullptr, nullptr, &tv) == 1);
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if (count <= 0)
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{
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kak_assert(buffer->flags() & Buffer::Flags::Fifo);
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buffer->flags() &= ~Buffer::Flags::Fifo;
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buffer->flags() &= ~Buffer::Flags::NoUndo;
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close(fifo);
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buffer->run_hook_in_own_context("BufCloseFifo", "");
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delete &watcher;
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}
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});
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buffer->hooks().add_hook("BufClose", "",
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[buffer, watcher](const String&, const Context&) {
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// Check if fifo is still alive, else watcher is already dead
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if (buffer->flags() & Buffer::Flags::Fifo)
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{
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close(watcher->fd());
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buffer->run_hook_in_own_context("BufCloseFifo", "");
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delete watcher;
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}
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});
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return buffer;
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}
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}
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