Handle terminal resize

src/file_stream.cpp

@@ -84,8 +84,6 @@ bool FileStream::nextFile() {
 
 void FileStream::readCb(ev::io &w, int revents) {
   if (!file_reader.read(**current_file)) {
-    size_t block_lines =
-        (config.block_lines < 0) ? terminal.getHeight() : config.block_lines;
     if (file_reader.linesRead() >= block_lines) {
       io_watcher.stop();
       on_read(file_reader);
@@ -122,6 +120,8 @@ void FileStream::read(std::function<void(const Text &text)> _on_read,
   on_read = _on_read;
   on_end = _on_end;
   direction = _direction;
+  block_lines =
+      (config.block_lines < 0) ? terminal.getHeight() : config.block_lines;
 
   (**current_file).newPage(direction);
   file_reader.reset(direction);

src/file_stream.h

@@ -51,6 +51,7 @@ class FileStream {
   std::function<void()> on_end;
   FileIO::Direction direction;
   bool end_reached = false;
+  size_t block_lines;
 
   void readCb(ev::io &w, int revents);
   bool nextFile();

src/terminal.cpp

@@ -84,6 +84,11 @@ Terminal::Terminal(const Config &config)
 
     color_pairs[std::make_pair(default_fg, default_bg)] = 0;
   }
+  onKeyPress([this](int cmd) {
+    if (cmd == KEY_RESIZE) {
+      getmaxyx(stdscr, height, width);
+    }
+  });
 }
 
 Terminal::~Terminal() {
@@ -211,16 +216,19 @@ void Terminal::stop() const {
 }
 
 void Terminal::inputCb(ev::io &w, int revents) {
-  on_key_press(getch());
+  int key = getch();
+  for (auto cb : on_key_press) {
+    cb(key);
+  }
 }
 
 void Terminal::onKeyPress(std::function<void(int)> _on_key_press) const {
   if (!_on_key_press) {
     return;
   }
-  if (!on_key_press) {
+  if (!on_key_press.size()) {
     io_watcher.set<Terminal, &Terminal::inputCb>(const_cast<Terminal *>(this));
     io_watcher.start(tty_fd, ev::READ);
   }
-  on_key_press = _on_key_press;
+  on_key_press.push_back(_on_key_press);
 }

src/terminal.h

@@ -72,7 +72,7 @@ class Terminal {
   int tty_fd;
   int stdin_fd = STDIN_FILENO;
   mutable ev::io io_watcher;
-  mutable std::function<void(int)> on_key_press;
+  mutable std::vector<std::function<void(int)>> on_key_press;
 
   short getColor(short color) const;
   short getColorPair(short fg, short bg) const;