yterm

diff --git a/source/app.c b/source/app.c
index 3eeab25f095e31772a06caf52de5a1b23cf0f01b..4f0eb5a3e58aa00e57f1c37336dd63f0ca724299 100644
--- a/source/app.c
+++ b/source/app.c
@@ -95,6 +95,7 @@ 	if (Input_MatchBind(app.bindPaste, e)) {
 		char* text = Window_GetClipboardText();
 		Pane_Paste(app.paneSel, text);
 		free(text);
+		return true;
 	}
 
 	return false;




diff --git a/source/interpreter/vt100.c b/source/interpreter/vt100.c
index 465745b5b7776c9acda15579654f27eb458f3bfa..8b15d18ec5ebefa3f299164b6baf070ce66ea5a9 100644
--- a/source/interpreter/vt100.c
+++ b/source/interpreter/vt100.c
@@ -4,6 +4,7 @@ #include "vt100.h"
 #include "../mem.h"
 #include "../util.h"
 #include "../input.h"
+#include "../buffer.h"
 #include "../keyboard.h"
 
 enum {
@@ -23,8 +24,9 @@ 	MOUSE_BOTH
 };
 
 typedef struct {
-	int  mode;
-	char reading[1024];
+	int    mode;
+	char   reading[1024];
+	Buffer altBuffer;
 
 	// terminal settings
 	bool bracketedPaste;
@@ -32,6 +34,7 @@ 	int  mouseMode;
 	Vec2 savedCursor;
 	bool appKeypad;
 	bool appCursor;
+	bool inAltBuff;
 } Vt100;
 
 static char* KeyToSequence(Vt100* this, Key key) {
@@ -527,7 +530,17 @@ 					case 12:   terminal->blinkCursor = true;        break;
 					case 25:   terminal->showCursor  = true;        break;
 					case 66:   this->appKeypad       = true;        break;
 					case 1047:
-					case 47:   break; // TODO: show alternate screen buffer
+					case 47: { // switch to alternate buffer
+						if (!this->inAltBuff) {
+							this->inAltBuff = true;
+
+							Buffer temp      = this->altBuffer;
+							this->altBuffer  = terminal->buffer;
+							terminal->buffer = temp;
+						}
+						puts("Switched to alternate buffer");
+						break;
+					}
 					case 1000: this->mouseMode = MOUSE_BOTH; break;
 					case 1001: break; // TODO: use hilite motion mouse tracking
 					case 1002: break; // TODO: use cell motion mouse tracking
@@ -537,9 +550,15 @@ 						this->savedCursor = terminal->cursor;
 						break;
 					}
 					case 1049: {
-						this->savedCursor = terminal->cursor;
-						break;
-						// TODO: switch to alternate screen buffer
+						if (!this->inAltBuff) {
+							this->inAltBuff   = true;
+							this->savedCursor = terminal->cursor;
+
+							Buffer temp      = this->altBuffer;
+							this->altBuffer  = terminal->buffer;
+							terminal->buffer = temp;
+						}
+						puts("Switched to alternate buffer");
 					}
 					case 2004: break; // TODO: bracketed paste mode
 					default: printf("Unsupported: %dh\n", param);
@@ -560,7 +579,17 @@ 					case 12:   terminal->blinkCursor = false;     break;
 					case 25:   terminal->showCursor  = false;     break;
 					case 66:   this->appKeypad       = false;     break;
 					case 1047:
-					case 47:   break; // TODO: use normal screen buffer
+					case 47: { // switch to normal screen buffer
+						if (this->inAltBuff) {
+							this->inAltBuff = false;
+
+							Buffer temp      = this->altBuffer;
+							this->altBuffer  = terminal->buffer;
+							terminal->buffer = temp;
+						}
+						puts("Switched to normal buffer");
+						break;
+					}
 					case 1000: this->mouseMode = MOUSE_OFF; break;
 					case 1001: break; // TODO: do not use hilite motion mouse tracking
 					case 1002: break; // TODO: do not use cell motion mouse tracking
@@ -570,9 +599,16 @@ 						terminal->cursor = this->savedCursor;
 						break;
 					}
 					case 1049: {
-						terminal->cursor = this->savedCursor;
+						if (this->inAltBuff) {
+							this->inAltBuff  = false;
+							terminal->cursor = this->savedCursor;
+
+							Buffer temp      = this->altBuffer;
+							this->altBuffer  = terminal->buffer;
+							terminal->buffer = temp;
+						}
+						puts("Switched to normal buffer");
 						break;
-						// TODO: switch to normal screen buffer
 					}
 					case 2004: break; // TODO: bracketed paste mode
 					default: printf("Unsupported: %dl\n", param);
@@ -693,6 +729,14 @@ 					}
 
 					break;
 				}
+				case '7': { // save cursor
+					this->savedCursor = terminal->cursor;
+					break;
+				}
+				case '8': { // restore cursor
+					terminal->cursor = this->savedCursor;
+					break;
+				}
 				default: {
 					printf("Unimplemented: ESC (%d) '%c'\n", ch, ch);
 					this->mode = MODE_READY; // invalid
@@ -763,7 +807,8 @@ 	}
 }
 
 static void OnResize(Interpreter* p_this, Terminal* terminal, int w, int h, int ow, int oh) {
-	(void) p_this;
+	Vt100* this = (Vt100*) p_this->data;
+
 	(void) w;
 	(void) ow;
 
@@ -776,6 +821,8 @@ 	else if (h < oh) {
 		Buffer_Scroll(&terminal->buffer, -(oh - h));
 		terminal->cursor.y += oh - h;
 	}
+
+	Buffer_Resize(&this->altBuffer, w, terminal->buffer.height);
 }
 
 static void OnPaste(Interpreter* p_this, Terminal* terminal, const char* data) {
@@ -792,11 +839,12 @@ 		SysTerm_WriteString(&terminal->term, "\x1b[201~");
 	}
 }
 
-Interpreter Interpreter_VT100(void) {
+Interpreter Interpreter_VT100(Terminal* terminal) {
 	Vt100* data = SafeMalloc(sizeof(Vt100));
 
 	data->reading[0] = 0;
 	data->mode       = MODE_READY;
+	data->altBuffer  = Buffer_New(terminal->buffer.width, terminal->buffer.height);
 
 	// terminal settings
 	data->bracketedPaste = false;




diff --git a/source/interpreter/vt100.h b/source/interpreter/vt100.h
index 75db1b81f7f7e2ac8bd468fb31bd2079d87d89b0..cee65878f918b45128466e2031cf225227c0d3ea 100644
--- a/source/interpreter/vt100.h
+++ b/source/interpreter/vt100.h
@@ -3,6 +3,6 @@ #define YT_INTERPRETER_VT100_H
 
 #include "../interpreter.h"
 
-Interpreter Interpreter_VT100(void);
+Interpreter Interpreter_VT100(Terminal* terminal);
 
 #endif




diff --git a/source/terminal.c b/source/terminal.c
index 74fbadd50cb897ea0c9a59c557f8614a9016995b..8bd37f20cbfcf3b5418b409e8b569876d7632f44 100644
--- a/source/terminal.c
+++ b/source/terminal.c
@@ -24,7 +24,7 @@ 	}
 
 	ret.interpreter = SafeMalloc(sizeof(Interpreter));
 
-	*((Interpreter*) ret.interpreter) = Interpreter_VT100();
+	*((Interpreter*) ret.interpreter) = Interpreter_VT100(&ret);
 
 	*success = true;
 	return ret;