150 lines
4.4 KiB
C++
150 lines
4.4 KiB
C++
#include "buffer_utils.hh"
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#include "buffer_manager.hh"
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#include "event_manager.hh"
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#include <unistd.h>
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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_buffer_from_data(StringView data, StringView name,
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Buffer::Flags flags, time_t fs_timestamp)
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{
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bool bom = false, crlf = false;
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const char* pos = data.begin();
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if (data.length() >= 3 and
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data[0] == '\xEF' and data[1] == '\xBB' and data[2] == '\xBF')
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{
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bom = true;
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pos = data.begin() + 3;
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}
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std::vector<String> lines;
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while (pos < data.end())
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{
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const char* line_end = pos;
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while (line_end < data.end() and *line_end != '\r' and *line_end != '\n')
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++line_end;
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// this should happen only when opening a file which has no
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// end of line as last character.
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if (line_end == data.end())
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{
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lines.emplace_back(pos, line_end);
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lines.back() += '\n';
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break;
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}
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lines.emplace_back(pos, line_end + 1);
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lines.back().back() = '\n';
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if (line_end+1 != data.end() and *line_end == '\r' and *(line_end+1) == '\n')
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{
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crlf = true;
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pos = line_end + 2;
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}
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else
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pos = line_end + 1;
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}
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Buffer* buffer = BufferManager::instance().get_buffer_ifp(name);
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if (buffer)
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buffer->reload(std::move(lines), fs_timestamp);
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else
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buffer = new Buffer{name, flags, std::move(lines), fs_timestamp};
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OptionManager& options = buffer->options();
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options.get_local_option("eolformat").set<String>(crlf ? "crlf" : "lf");
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options.get_local_option("BOM").set<String>(bom ? "utf-8" : "no");
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return buffer;
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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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// if we read data slower than it arrives in the fifo, limiting the
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// iteration number allows us to go back go back to the event loop and
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// handle other events sources (such as input)
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size_t loops = 16;
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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 (--loops and count > 0 and
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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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