Merge branch 'copy-range' of sloum/hermes into master

hermes.c

@@ -937,25 +937,54 @@ void editorEndOfWord() {
   }
 }
 
-void editorCopySelection() {
-  if (E.cy == E.vy) {
-    int sx = E.vx;
-    int ex = E.cx;
-    if (E.cx < E.vx) {
-      sx = E.cx;
-      ex = E.vx;
+void editorCopyRange(int sx, int sy, int ex, int ey) {
+  int swap;
+  if (ey < sy || (sy == ey && ex < sx)) {
+    swap = sy; sy = ey; ey = swap;
+    swap = sx; sx = ex; ex = swap;
+  } 
+  if (sy < 0 || ey > E.numRows) return;
+
+  int totlen = 0;
+  char *buf;
+  if (ey - sy == 0) {
+    totlen = ex - sx + 1;
+    buf = malloc(totlen);
+    memcpy(buf, &E.row[sy].chars[sx], totlen);
+  } else {
+    for (int y = sy; y <= ey; y++) {
+      totlen += E.row[y].size + 1;
+    }
+
+    totlen -= sx;
+    totlen -= (E.row[ey].size - ex);
+    totlen++;
+
+    buf = malloc(totlen);
+    char *p = buf;
+    for (int row = sy; row <= ey; row++) {
+      if (row == sy) {
+        memcpy(p, &E.row[row].chars[sx], E.row[row].size - sx);
+        p += E.row[row].size - sx;
+        *p = '\r';
+        p++;
+      } else if (row == ey) {
+        memcpy(p, E.row[row].chars, ex + 1);
+        p += ex + 1;
+        *p = '\r';
+      } else {
+        memcpy(p, E.row[row].chars, E.row[row].size);
+        p += E.row[row].size;
+        *p = '\r';
+        p++;
+      }
     }
-    int len = ex - sx + 1;
-    char *buf = malloc(len);
-    memcpy(buf, &E.row[E.cy].chars[sx], len);
-    editorUpdatePaste(buf, len);
-    free(buf);
   }
-  // TODO multiline copy... been having problems
+  editorUpdatePaste(buf, totlen);
+  free(buf);
 }
 
 void editorDeleteSelection() {
-  editorCopySelection();
   int sx = E.cx;
   int sy = E.cy;
   int ex = E.vx;
@@ -968,6 +997,7 @@ void editorDeleteSelection() {
     E.cx = sx;
     E.cy = sy;
   }
+  editorCopyRange(sx, sy, ex, ey);
 
   if (sx < E.row[sy].size)
     E.cx++;
@@ -1307,6 +1337,7 @@ void editorCommandKp(int c) {
       break;
     case 'P':
     case 'p':
+      if (E.pastelen <= 0) break;
       {
         char open = c == 'p' ? 'o' : 'O';
         int startx = E.cx;
@@ -1397,7 +1428,7 @@ void editorCommandKp(int c) {
       break;
     case 'y':
       if (E.mode == VisualMode) {
-        editorCopySelection();
+        editorCopyRange(E.cx, E.cy, E.vx, E.vy);
         E.mode = CommandMode;
         E.cy = E.vy;
         E.cx = E.vx;