Merge pull request #40 from liamg/url-detection

added url detection and clicking

README.md

@@ -64,6 +64,7 @@ Ensure you have your latest graphics card drivers installed before use.
 | Config file                 | ✔    |
 | Scrolling                   | ✔    | 
 | Mouse interaction           | ✔    | 
+| Clickable URLs              | ✔    |
 | Sweet render effects        |      | 
 
 ## Keyboard Shortcuts

buffer/buffer.go

@@ -2,6 +2,7 @@ package buffer
 
 import (
 	"fmt"
+	"net/url"
 	"time"
 )
 
@@ -47,6 +48,45 @@ func NewBuffer(viewCols uint16, viewLines uint16, attr CellAttributes) *Buffer {
 	return b
 }
 
+func (buffer *Buffer) GetURLAtPosition(col uint16, row uint16) string {
+
+	cell := buffer.GetCell(col, row)
+	if cell == nil || cell.Rune() == 0x00 {
+		return ""
+	}
+
+	candidate := ""
+
+	for i := col; i >= 0; i-- {
+		cell := buffer.GetCell(i, row)
+		if cell == nil {
+			break
+		}
+		if isRuneURLSelectionMarker(cell.Rune()) {
+			break
+		}
+		candidate = fmt.Sprintf("%c%s", cell.Rune(), candidate)
+	}
+
+	for i := col + 1; i < buffer.viewWidth; i++ {
+		cell := buffer.GetCell(i, row)
+		if cell == nil {
+			break
+		}
+		if isRuneURLSelectionMarker(cell.Rune()) {
+			break
+		}
+		candidate = fmt.Sprintf("%s%c", candidate, cell.Rune())
+	}
+
+	// check if url
+	_, err := url.ParseRequestURI(candidate)
+	if err != nil {
+		return ""
+	}
+	return candidate
+}
+
 func (buffer *Buffer) SelectWordAtPosition(col uint16, row uint16) {
 
 	cell := buffer.GetCell(col, row)
@@ -62,7 +102,7 @@ func (buffer *Buffer) SelectWordAtPosition(col uint16, row uint16) {
 		if cell == nil {
 			break
 		}
-		if isRuneSelectionMarker(cell.Rune()) {
+		if isRuneWordSelectionMarker(cell.Rune()) {
 			break
 		}
 		start = i
@@ -73,7 +113,7 @@ func (buffer *Buffer) SelectWordAtPosition(col uint16, row uint16) {
 		if cell == nil {
 			break
 		}
-		if isRuneSelectionMarker(cell.Rune()) {
+		if isRuneWordSelectionMarker(cell.Rune()) {
 			break
 		}
 		end = i
@@ -92,7 +132,7 @@ func (buffer *Buffer) SelectWordAtPosition(col uint16, row uint16) {
 }
 
 // bounds for word selection
-func isRuneSelectionMarker(r rune) bool {
+func isRuneWordSelectionMarker(r rune) bool {
 	switch r {
 	case ',', ' ', ':', ';', 0, '\'', '"', '[', ']', '(', ')', '{', '}':
 		return true
@@ -101,6 +141,15 @@ func isRuneSelectionMarker(r rune) bool {
 	return false
 }
 
+func isRuneURLSelectionMarker(r rune) bool {
+	switch r {
+	case ' ', 0, '\'', '"', '{', '}':
+		return true
+	}
+
+	return false
+}
+
 func (buffer *Buffer) GetSelectedText() string {
 	if buffer.selectionStart == nil || buffer.selectionEnd == nil {
 		return ""

gui/mouse.go

@@ -3,6 +3,8 @@ package gui
 import (
 	"fmt"
 	"math"
+	"os/exec"
+	"runtime"
 
 	"github.com/go-gl/glfw/v3.2/glfw"
 	"github.com/liamg/aminal/terminal"
@@ -10,12 +12,34 @@ import (
 
 func (gui *GUI) mouseMoveCallback(w *glfw.Window, xpos float64, ypos float64) {
 
+	px, py := w.GetCursorPos()
+	x := uint16(math.Floor((px - float64(gui.renderer.areaX)) / float64(gui.renderer.CellWidth())))
+	y := uint16(math.Floor((py - float64(gui.renderer.areaY)) / float64(gui.renderer.CellHeight())))
 	if gui.mouseDown {
-		px, py := w.GetCursorPos()
-		x := uint16(math.Floor((px - float64(gui.renderer.areaX)) / float64(gui.renderer.CellWidth())))
-		y := uint16(math.Floor((py - float64(gui.renderer.areaY)) / float64(gui.renderer.CellHeight())))
 		gui.terminal.ActiveBuffer().EndSelection(x, y, false)
 	}
+
+	if url := gui.terminal.ActiveBuffer().GetURLAtPosition(x, y); url != "" {
+		w.SetCursor(glfw.CreateStandardCursor(glfw.HandCursor))
+	} else {
+		w.SetCursor(glfw.CreateStandardCursor(glfw.ArrowCursor))
+	}
+}
+
+func (gui *GUI) launchTarget(target string) {
+
+	cmd := "xdg-open"
+
+	switch runtime.GOOS {
+	case "darwin":
+		cmd = "open"
+	case "windows":
+		cmd = "start"
+	}
+
+	if err := exec.Command(cmd, target).Run(); err != nil {
+		gui.logger.Errorf("Failed to launch external command %s: %s", cmd, err)
+	}
 }
 
 func (gui *GUI) mouseButtonCallback(w *glfw.Window, button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
@@ -33,6 +57,9 @@ func (gui *GUI) mouseButtonCallback(w *glfw.Window, button glfw.MouseButton, act
 	} else if action == glfw.Release {
 		gui.mouseDown = false
 		gui.terminal.ActiveBuffer().EndSelection(x, y, true)
+		if url := gui.terminal.ActiveBuffer().GetURLAtPosition(x, y); url != "" {
+			go gui.launchTarget(url)
+		}
 	}
 	// https://www.xfree86.org/4.8.0/ctlseqs.html