initial commit

disp.cc

@@ -0,0 +1,55 @@
+#include <fstream>
+
+#include <curses.h>
+
+#include "disp.h"
+#include "public.h"
+
+// clears ncurses rows in a specific region only
+void
+clearRows(int startingRow, int endingRow)
+{
+	// preserve the cursor location
+	int yBefore, xBefore;
+	getyx(stdscr, yBefore, xBefore);
+
+	for (int i = startingRow; i < endingRow; i++) {
+		move(i, 0);
+		clrtoeol(); // clear to end of line
+	}
+
+	// restore original cursor location
+	move(yBefore, xBefore);
+}
+
+// display a file using ncurses
+int
+displayFile(string path, int startLineNum = 0, int numLines = 10)
+{
+	ifstream file(path);
+	if (!file) {
+		return 1;
+	} else {
+		clearRows(0, numLines + 1); // clear the chat area
+		int lineNum = 0;
+		string line;
+
+		// print each line directly to the screen
+		int num = 0;
+		while (getline(file, line) &&
+		       num <= numLines + startLineNum + 1) // while there is file content and the
+							   // line number isn't too high
+		{
+			if (num >= startLineNum) {
+				move(lineNum, 0);
+				printw("%s", line.c_str());
+				lineNum++; // increment the row number after
+					   // printing each line
+			}
+			num++;
+		}
+		move(DEFAULT_CUR_Y, DEFAULT_CUR_X);
+		refresh();
+		return 0;
+	}
+}