From 52aedb077c7e71dcafefa33c86aac4bc9600a8c1 Mon Sep 17 00:00:00 2001
From: Roman Shevchenko <rrrooommmaaa@mail.ru>
Date: Wed, 6 Mar 2019 18:53:51 +0300
Subject: [PATCH] #147 Hyperlinks, corrected set/unset

---
 terminal/osc.go      | 36 +++++++++++++++++++++++-------------
 terminal/sixel.go    | 10 ++++++++--
 terminal/terminal.go |  3 ++-
 3 files changed, 33 insertions(+), 16 deletions(-)

diff --git a/terminal/osc.go b/terminal/osc.go
index 7c41920..8322156 100644
--- a/terminal/osc.go
+++ b/terminal/osc.go
@@ -12,18 +12,28 @@ func oscHandler(pty chan rune, terminal *Terminal) error {
 	params := []string{}
 	param := ""
 
-	for {
-		b := <-pty
-		if terminal.IsOSCTerminator(b) {
-			params = append(params, param)
-			break
+	{
+		isEscaped := false // flag if the previous character was escape
+
+		for {
+			b := <-pty
+			if terminal.IsOSCTerminator(b, isEscaped) {
+				params = append(params, param)
+				break
+			}
+			if isEscaped {
+				isEscaped = false
+			} else if b == 0x1b {
+				isEscaped = true
+				continue
+			}
+			if b == ';' {
+				params = append(params, param)
+				param = ""
+				continue
+			}
+			param = fmt.Sprintf("%s%c", param, b)
 		}
-		if b == ';' {
-			params = append(params, param)
-			param = ""
-			continue
-		}
-		param = fmt.Sprintf("%s%c", param, b)
 	}
 
 	if len(params) == 0 {
@@ -42,8 +52,8 @@ func oscHandler(pty chan rune, terminal *Terminal) error {
 	case "0", "2":
 		terminal.SetTitle(pT)
 	case "8": // hyperlink
-		if len(pS) > 2 {
-			terminal.terminalState.CurrentHyperlink = &buffer.Hyperlink{Uri: pS[2]}
+		if len(params) > 2 && len(params[2]) > 0 {
+			terminal.terminalState.CurrentHyperlink = &buffer.Hyperlink{Uri: params[2]}
 		} else {
 			terminal.terminalState.CurrentHyperlink = nil
 		}
diff --git a/terminal/sixel.go b/terminal/sixel.go
index 4c452bc..5eecc47 100644
--- a/terminal/sixel.go
+++ b/terminal/sixel.go
@@ -11,14 +11,20 @@ import (
 	"github.com/liamg/aminal/sixel"
 )
 
-type boolFormRuneFunc func(rune) bool
+type boolFormRuneFunc func(rune, bool) bool
 
 func swallowByFunction(pty chan rune, isTerminator boolFormRuneFunc) {
+	isEscaped := false
 	for {
 		b := <-pty
-		if isTerminator(b) {
+		if isTerminator(b, isEscaped) {
 			break
 		}
+		if isEscaped {
+			isEscaped = false
+		} else if b == 0x1b {
+			isEscaped = true
+		}
 	}
 }
 
diff --git a/terminal/terminal.go b/terminal/terminal.go
index 1e117f0..20eca8d 100644
--- a/terminal/terminal.go
+++ b/terminal/terminal.go
@@ -134,7 +134,8 @@ func (terminal *Terminal) GetMouseExtMode() MouseExtMode {
 	return terminal.mouseExtMode
 }
 
-func (terminal *Terminal) IsOSCTerminator(char rune) bool {
+func (terminal *Terminal) IsOSCTerminator(char rune, isEscaped bool) bool {
+	// @todo handle isEscaped flag
 	_, ok := terminal.platformDependentSettings.OSCTerminators[char]
 	return ok
 }