Automatic commit

[selector.git] / selector.cc

diff --git a/selector.cc b/selector.cc
index ab793b0..7a79979 100644 (file)
--- a/selector.cc
+++ b/selector.cc
@@ -28,35 +28,96 @@
 
 using namespace std;
 
-void build_display(char **choices, char *regexp) {
-  clear();         // Cleaning the window
-  refresh();       // After doing something on the display, we refresh it
-  for(int y = 0; y < 10; y++) {
-    printw("y = %d\n", y);
+const int buffer_size = 1024;
+const int nb_lines_max = 100000;
+
+void build_display(int *screen_line, int *line, int nb_lines, char **lines, char *regexp) {
+  char buffer[buffer_size];
+
+  int maxx = getmaxx(stdscr);
+  int maxy = min(buffer_size-2, getmaxy(stdscr));
+
+  // clear();         // Cleaning the window
+
+  use_default_colors();
+
+  printw("\n");
+
+  int nb_printed_lines = 1, last_printer_line = -1;
+  int y = 0;
+
+  while(nb_printed_lines < maxy && y < nb_lines) {
+    if(strstr(lines[y], regexp) &&
+       (last_printer_line < 0 || strcmp(lines[y], lines[last_printer_line]))) {
+      int k = 0;
+
+      while(lines[y][k] && k < buffer_size - 2 && k < maxx - 1) {
+        buffer[k] = lines[y][k];
+        k++;
+      }
+
+      while(k < maxx - 1) {
+        buffer[k++] = ' ';
+      }
+      buffer[k++] = '\n';
+      buffer[k++] = '\0';
+
+      if(nb_printed_lines == *line + 1) {
+        attron(COLOR_PAIR(2));
+        printw(buffer);
+        attroff(COLOR_PAIR(2));
+      } else {
+        printw(buffer);
+      }
+
+      last_printer_line = y;
+      nb_printed_lines++;
+    }
+    y++;
+  }
+
+  { // Erase the rest of the window. That's slightly ugly.
+    int k = 0;
+    while(k < maxx - 1) {
+      buffer[k++] = ' ';
+    }
+    buffer[k++] = '\n';
+    buffer[k++] = '\0';
+    for(int l = nb_printed_lines; l < maxy; l++) {
+      printw(buffer);
+    }
   }
-  printw("regexp = \"%s\"", regexp);
+
+  // Draw the modeline
+
+  move(0, 0);
+  attron(COLOR_PAIR(1));
+  sprintf(buffer, "%d/%d pattern: %s", nb_printed_lines - 1, nb_lines, regexp);
+  for(int k = strlen(buffer); k < maxx - 1; k++) buffer[k] = ' ';
+  buffer[maxx-1] = '\0';
+  printw(buffer);
+  attroff(COLOR_PAIR(1));
+
+  refresh();       // After doing something on the display, we refresh it
 }
 
 int main(int argc, char **argv) {
-  int dummy, xpos, ypos;
-  const int buffer_size = 1024;
-  const int nb_lines_max = 1000;
-
   char buffer[buffer_size];
   char *lines[nb_lines_max];
 
-  ifstream file(argv[1]);
+  char *file_name;
+  char stdin_name[] = "/dev/stdin";
 
-  if(argc != 2) {
-    cerr << argv[0] << " <file>" << endl;
-    return 1;
+  if(argc == 2 && strcmp(argv[1], "-")) {
+    file_name = argv[1];
+  } else {
+    file_name = stdin_name;
   }
 
+  ifstream file(file_name);
+
   if(file.fail()) {
-    cerr << "Can not open \""
-         << argv[1]
-         << "\""
-         << endl;
+    cerr << "Can not open \"" << file_name << "\"" << endl;
     return 1;
   }
 
@@ -65,44 +126,66 @@ int main(int argc, char **argv) {
     file.getline(buffer, buffer_size);
     lines[nb_lines] = new char[strlen(buffer) + 1];
     strcpy(lines[nb_lines], buffer);
+    nb_lines++;
   }
 
   char regexp[buffer_size]="";
   int regexp_point;
   regexp_point = 0;
 
-  initscr();        // Necessary to start a curses session
+  initscr();
 
-  if (has_colors()) {
-    cout << "You can use color on this terminal" << endl;
-  } else {
-    cout << "No colors." << endl;
+  if(!has_colors()) {
+    cerr << "No colors." << endl;
     return 1;
   }
 
-  noecho();        // I don't want echo when I press a key
-  curs_set(0);     // I don't want to see the cursor
-
-  start_color();   // We will use colors
-  init_pair(1, COLOR_RED, COLOR_BLACK); // red on black for error messages
+  noecho();
+  curs_set(0);
+  keypad(stdscr, TRUE);
 
-  // attron(COLOR_PAIR(1));        // Let's print something in red on black
-  // printw("Hello world\n");      // That's how we print something!
-  // attroff(COLOR_PAIR(1));       // Let's get back to default colors!
+  start_color();
+  init_pair(1, COLOR_WHITE, COLOR_BLACK);
+  init_pair(2, COLOR_BLACK, COLOR_YELLOW);
 
-  printw("Press a key to contine\n");
   int key;
 
+  int line = 0, screen_line = 0;
+
+  build_display(&screen_line, &line, nb_lines, lines, regexp);
+
   do {
-    build_display(0, regexp);
+
     key = getch();
-    regexp[regexp_point++] = key;
-    regexp[regexp_point] = '\0';
-  } while(key != 'q');
 
-  echo();         // We want to have echo
-  curs_set(1);    // We want to see the cursor again
-  endwin();       // Back to normal
+    if(key >= ' ' && key <= 'z') {
+      regexp[regexp_point++] = key;
+      regexp[regexp_point] = '\0';
+    }
+
+    else if(key == KEY_BACKSPACE || key == KEY_DC) {
+      if(regexp_point > 0) {
+        regexp_point--;
+        regexp[regexp_point] = '\0';
+      }
+    }
+
+    else if(key == KEY_UP || key == '\10') {
+      if(line > 0) {
+        line--;
+      }
+    }
+
+    else if(key == KEY_DOWN || key == '\ e') {
+      line++;
+    }
+
+    build_display(&screen_line, &line, nb_lines, lines, regexp);
+  } while(key != '\n' && key != KEY_ENTER && key != '\a');
+
+  echo();
+  curs_set(1);
+  endwin();
 
   for(int l = 0; l < nb_lines; l++) {
     delete[] lines[l];