lots more sequences

docs/sequences.md

@@ -17,7 +17,7 @@ Status meanings:
     in the face of it (probably in some broken state).
   * 💥 - Ghostty crashes if this control sequence is sent.
 
-| Seq | ASCII | Name | Status |
+| ID | ASCII | Name | Status |
 |:---:|:-----:|:-----|:------:|
 | `ENQ` | `0x05` | [Enquiry](sequences/enq.md) | ✅ |
 | `BEL` | `0x07` | [Bell](sequences/bel.md) | ❌ |
@@ -31,3 +31,12 @@ Status meanings:
 | `SI` | `0x0F` | [Shift In](#) | ❌ |
 | `CAN` | `0x18` | [Cancel Parsing](sequences/can.md) | ✅ |
 | `SUB` | `0x1A` | [Cancel Parsing (Alias)](sequences/can.md) | ✅ |
+| `IND` | `ESC D` | [Index](sequences/ind.md) | ✅ |
+| `NEL` | `ESC E` | [Next Line](sequences/nel.md) | ✅ |
+| `HTS` | `ESC H` | [Horizontal Tab Set](sequences/hts.md) | ✅ |
+| `HTS` | `ESC H` | [Horizontal Tab Set](sequences/hts.md) | ✅ |
+| `RI` | `ESC M` | [Reverse Index](sequences/ri.md) | ⚠️ |
+| `SS2` | `ESC N` | [Single Shift 2](#) | ❌ |
+| `SS3` | `ESC O` | [Single Shift 3](#) | ❌ |
+| `SPA` | `ESC V` | [Start Protected Area](#) | ❌ |
+| `EPA` | `ESC W` | [End Protected Area](#) | ❌ |

docs/sequences/hts.md

@@ -0,0 +1,8 @@
+# Horizontal Tab Set
+
+|     |   |
+| --- | --- |
+| Text | `ESC H`     |
+| Hex  | `0x18 0x48` |
+
+Mark the current cursor colum as a tab stop.

docs/sequences/ind.md

@@ -0,0 +1,19 @@
+# Index
+
+|     |   |
+| --- | --- |
+| Text | `ESC D`     |
+| Hex  | `0x18 0x44` |
+
+Move the cursor to the next line in the scrolling region, scrolling
+if necessary. This always unsets the pending wrap state.
+
+If the cursor is currently outside the scrolling region:
+
+  * move the cursor down one line if it is not on bottom line of the screen.
+
+If the cursor is inside the scrolling region:
+
+  * If the cursor is on the bottom-most line of the screen: invoke
+    [scroll up](su.md) with the value `1`.
+  * Else: move the cursor one line down.

docs/sequences/nel.md

@@ -0,0 +1,8 @@
+# Index
+
+|     |   |
+| --- | --- |
+| Text | `ESC E`     |
+| Hex  | `0x18 0x45` |
+
+Invoke [carriage return](cr.md) and then [index](ind.md).

docs/sequences/ri.md

@@ -0,0 +1,21 @@
+# Reverse Index
+
+|     |   |
+| --- | --- |
+| Text | `ESC M`     |
+| Hex  | `0x18 0x4D` |
+
+Reverse [index](ind.md). This unsets the pending wrap state.
+
+If the cursor is outside of the scrolling region:
+
+  * move the cursor one line up unless it is the top-most line of the screen.
+
+If the cursor is inside the scrolling region:
+
+  * If the cursor is on the top-most line: invoke [scroll down](#) with value `1`
+  * Else: move the cursor one line up.
+
+## TODO
+
+  * Scroll region edge cases