From 8a22a34853d1a14420e07da0af01faf984ac4d33 Mon Sep 17 00:00:00 2001
From: sloum <sloum@colorfield.space>
Date: Sat, 8 May 2021 14:53:33 -0700
Subject: [PATCH] Adds url opening

---
 main.go                 |  5 +++++
 open_browser_darwin.go  | 13 +++++++++++++
 open_browser_other.go   | 30 ++++++++++++++++++++++++++++++
 open_browser_windows.go | 13 +++++++++++++
 workbook.go             |  6 ++++++
 5 files changed, 67 insertions(+)
 create mode 100644 open_browser_darwin.go
 create mode 100644 open_browser_other.go
 create mode 100644 open_browser_windows.go

diff --git a/main.go b/main.go
index 5b72697..cf091f9 100644
--- a/main.go
+++ b/main.go
@@ -25,6 +25,7 @@ const (
 var wb workbook
 var reAddr *regexp.Regexp = regexp.MustCompile(`^\$?[A-Z]\$?[0-9]+$`)
 var reAddrRange *regexp.Regexp = regexp.MustCompile(`^\$?[A-Z]\$?[0-9]+:\$?[A-Z]\$?[0-9]+\+$`)
+var reURL *regexp.Regexp = regexp.MustCompile(`^.*://.*$`)
 var modified bool = false
 
 type point struct {
@@ -178,6 +179,10 @@ func IsRange(addr string) bool {
 	return reAddrRange.MatchString(addr)
 }
 
+func IsURL(u string) bool {
+	return reURL.MatchString(u)
+}
+
 func IsFunc(val string) bool {
 	switch strings.ToUpper(val) {
 	case "+", "-", "/", "*", "MIN", "MAX",
diff --git a/open_browser_darwin.go b/open_browser_darwin.go
new file mode 100644
index 0000000..d57a290
--- /dev/null
+++ b/open_browser_darwin.go
@@ -0,0 +1,13 @@
+// This will build for osx without a build tag based on the filename
+
+package http
+
+import "os/exec"
+
+func OpenInBrowser(url string) (string, error) {
+	err := exec.Command("open", url).Start()
+	if err != nil {
+		return "", err
+	}
+	return "Opened in system default web browser", nil
+}
diff --git a/open_browser_other.go b/open_browser_other.go
new file mode 100644
index 0000000..2f74d22
--- /dev/null
+++ b/open_browser_other.go
@@ -0,0 +1,30 @@
+// +build !darwin,!windows
+
+package http
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+// OpenInBrowser checks for the presence of a display server
+// and environment variables indicating a gui is present. If found
+// then xdg-open is called on a url to open said url in the default
+// gui web browser for the system
+func OpenInBrowser(url string) (string, error) {
+	disp := os.Getenv("DISPLAY")
+	wayland := os.Getenv("WAYLAND_DISPLAY")
+	_, err := exec.LookPath("Xorg")
+	if disp == "" && wayland == "" && err != nil {
+		return "", fmt.Errorf("No gui is available, check 'webmode' setting")
+	}
+
+	// Use start rather than run or output in order
+	// to release the process and not block
+	err = exec.Command("xdg-open", url).Start()
+	if err != nil {
+		return "", err
+	}
+	return "Opened in system default web browser", nil
+}
diff --git a/open_browser_windows.go b/open_browser_windows.go
new file mode 100644
index 0000000..496d00b
--- /dev/null
+++ b/open_browser_windows.go
@@ -0,0 +1,13 @@
+// This will only build for windows based on the filename
+// no build tag required
+package http
+
+import "os/exec"
+
+func OpenInBrowser(url string) (string, error) {
+	err := exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
+	if err != nil {
+		return "", err
+	}
+	return "Opened in system default web browser", nil
+}
diff --git a/workbook.go b/workbook.go
index af24ea9..b7be7a3 100644
--- a/workbook.go
+++ b/workbook.go
@@ -34,6 +34,7 @@ const (
 	ModFaint      rune = 'f'
 	ModItalic     rune = 'i'
 	ModUnderline  rune = 'u'
+	OpenLink      rune = 'O'
 )
 
 type workbook struct {
@@ -133,6 +134,11 @@ func (w *workbook) Run() {
 			w.sheets[w.sheet].cells[w.sheets[w.sheet].selection.row-1][w.sheets[w.sheet].selection.col-1].ToggleMod(Italic)
 		case ModUnderline:
 			w.sheets[w.sheet].cells[w.sheets[w.sheet].selection.row-1][w.sheets[w.sheet].selection.col-1].ToggleMod(Underline)
+		case OpenLink:
+			url := w.sheets[w.sheet].cells[w.sheets[w.sheet].selection.row-1][w.sheets[w.sheet].selection.col-1].mask
+			if IsURL(url) {
+				OpenInBrowser(url)
+			}
 		}
 	}
 }