Support DECSCUSR / xterm patch#282 compatible, for iTerm2

iTerm2-support-DECSCUSR.diff

diff --git a/VT100Screen.m b/VT100Screen.m
index cd303ae..03cc274 100644
--- a/VT100Screen.m
+++ b/VT100Screen.m
@@ -1571,6 +1571,38 @@ static char* FormatCont(int c)
             break;
     case VT100CSI_RM:
             break;
+    case VT100CSI_DECSCUSR:
+        switch (token.u.csi.p[0]) {
+            case 0:
+            case 1:
+                [[SESSION TEXTVIEW] setBlinkingCursor:true];
+                [[SESSION TEXTVIEW] setCursorType:CURSOR_BOX];
+                break;
+            case 2:
+                [[SESSION TEXTVIEW] setBlinkingCursor:false];
+                [[SESSION TEXTVIEW] setCursorType:CURSOR_BOX];
+                break;
+            case 3:
+                [[SESSION TEXTVIEW] setBlinkingCursor:true];
+                [[SESSION TEXTVIEW] setCursorType:CURSOR_UNDERLINE];
+                break;
+            case 4:
+                [[SESSION TEXTVIEW] setBlinkingCursor:false];
+                [[SESSION TEXTVIEW] setCursorType:CURSOR_UNDERLINE];
+                break;
+            case 5:
+                [[SESSION TEXTVIEW] setBlinkingCursor:true];
+                [[SESSION TEXTVIEW] setCursorType:CURSOR_VERTICAL];
+                break;
+            case 6:
+                [[SESSION TEXTVIEW] setBlinkingCursor:false];
+                [[SESSION TEXTVIEW] setCursorType:CURSOR_VERTICAL];
+                break;
+            default:
+                //NSLog(@"DECSCUSR: Unrecognized parameter: %d", token.u.csi.p[0]);
+                break;
+        }
+        break;
 
     /* My interpretation of this:
      * http://www.cl.cam.ac.uk/~mgk25/unicode.html#term
diff --git a/VT100Terminal.h b/VT100Terminal.h
index 2c59900..ebbd797 100644
--- a/VT100Terminal.h
+++ b/VT100Terminal.h
@@ -100,6 +100,7 @@
 #define VT100CSI_SGR         2045       // Select Graphic Rendition
 #define VT100CSI_SM          2046       // Set Mode
 #define VT100CSI_TBC         2047       // Tabulation Clear
+#define VT100CSI_DECSCUSR    2048       // Select the Style of the Cursor
 
 // some xterm extension
 #define XTERMCC_WIN_TITLE        86       // Set window title
diff --git a/VT100Terminal.m b/VT100Terminal.m
index 7954acc..0b6bbec 100644
--- a/VT100Terminal.m
+++ b/VT100Terminal.m
@@ -134,6 +134,7 @@
 #define REPORT_VT52          "\033/Z"
 
 #define conststr_sizeof(n)   ((sizeof(n)) - 1)
+#define MAKE_COMMAND(first, second) ((first << 8) | second)
 
 
 typedef struct {
@@ -319,6 +320,23 @@ static size_t getCSIParam(unsigned char *datap,
             datap++;
             break;
         }
+        else if (*datap == ' ') {
+            datap++;
+            datalen--;
+            switch (*datap) {
+                case 'q':
+                    param->cmd = MAKE_COMMAND(' ', 'q');
+                    datap++;
+                    datalen--;
+                    return datap - orgp;
+                default:
+                    //NSLog(@"Unrecognized sequence: CSI SP %c (0x%x)", *datap, *datap);
+                    datap++;
+                    datalen--;
+                    param->cmd=0xff;
+                    break;
+            }
+        }
         else if (*datap=='\'') {
             datap++;
             datalen--;
@@ -538,6 +556,11 @@ static VT100TCC decode_csi(unsigned char *datap,
                     result.type = VT100CSI_TBC;
                     SET_PARAM_DEFAULT(param, 0, 0);
                     break;
+                    
+                case MAKE_COMMAND(' ', 'q'):
+                    result.type = VT100CSI_DECSCUSR;
+                    SET_PARAM_DEFAULT(param, 0, 0);
+                    break;
 
                     // these are xterm controls
                 case '@':