add hinting

Gopkg.lock

@@ -88,12 +88,12 @@
 [[projects]]
   branch = "master"
   name = "golang.org/x/image"
-  packages = ["font","math/fixed"]
+  packages = ["bmp","font","math/fixed"]
   revision = "991ec62608f3c0da01d400756917825d1e2fd528"
 
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "62428a3f67dc7a8a89ecb5666b6d8a6641788f89c61d0b0b4dd99982923bb0c6"
+  inputs-digest = "6f1eff05a1c5ca969d1f54eb8002e3213fda92b99a459e6729098b2497de5b8c"
   solver-name = "gps-cdcl"
   solver-version = 1

README.md

@@ -10,7 +10,11 @@ The project is experimental at the moment, so you probably won't want to rely on
 
 Ensure you have your latest graphics card drivers installed before use.
 
-Sixels are now supported.
+## Contextual Hints
+
+![Example hint](hint.png)
+
+## Sixel Support
 
 ![Example sixel](sixel.png)
 
@@ -55,12 +59,17 @@ Sixels are now supported.
 
 ## Keyboard Shortcuts
 
-| Operation          | Key(s)           |
+| Operation             | Key(s)               |
-| ------------------ | ---------------- |
+| --------------------- | -------------------- |
-| Copy               | ctrl + shift + c |
+| Select text           | click + drag         |
-| Paste              | ctrl + shift + v |
+| Select word           | double click         |
-| Toggle slomo       | ctrl + shift + ; |
+| Select line           | triple click         |
-| Interrupt (SIGINT) | ctrl + c         |
+| Copy                  | ctrl + shift + c     |
+| Paste                 | ctrl + shift + v     |
+| Google selected text  | ctrl + shift + g     |
+| Report bug in aminal  | ctrl + shift + r     |
+| Explain text          | ctrl + shift + click |
+| Toggle slomo          | ctrl + shift + ;     |
  
 ## Configuration
 

buffer/hint.go

@@ -0,0 +1,49 @@
+package buffer
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/liamg/aminal/hints"
+)
+
+func (buffer *Buffer) GetHintAtPosition(col uint16, row uint16) *hints.Hint {
+
+	cell := buffer.GetCell(col, row)
+	if cell == nil || cell.Rune() == 0x00 {
+		return nil
+	}
+
+	candidate := ""
+
+	for i := col; i >= 0; i-- {
+		cell := buffer.GetCell(i, row)
+		if cell == nil {
+			break
+		}
+		if isRuneWordSelectionMarker(cell.Rune()) {
+			break
+		}
+		candidate = fmt.Sprintf("%c%s", cell.Rune(), candidate)
+	}
+
+	trimmed := strings.TrimLeft(candidate, " ")
+	sx := col - uint16(len(trimmed)-1)
+
+	for i := col + 1; i < buffer.viewWidth; i++ {
+		cell := buffer.GetCell(i, row)
+		if cell == nil {
+			break
+		}
+		if isRuneWordSelectionMarker(cell.Rune()) {
+			break
+		}
+
+		candidate = fmt.Sprintf("%s%c", candidate, cell.Rune())
+	}
+
+	line := buffer.lines[buffer.convertViewLineToRawLine(row)]
+
+	return hints.Get(strings.Trim(candidate, " "), line.String(), sx, row)
+
+}

gui/explain.go

@@ -0,0 +1,46 @@
+package gui
+
+import (
+	"github.com/go-gl/gl/all-core/gl"
+	"github.com/liamg/aminal/hints"
+)
+
+type annotation struct {
+	hint *hints.Hint
+}
+
+func newAnnotation(it *hints.Hint) *annotation {
+	return &annotation{
+		hint: it,
+	}
+}
+
+func (a *annotation) render(gui *GUI) {
+
+	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
+
+	lines := gui.terminal.GetVisibleLines()
+	for y := 0; y < len(lines); y++ {
+		cells := lines[y].Cells()
+		for x := 0; x < len(cells); x++ {
+			if int(x) >= len(cells) {
+				break
+			}
+			cell := cells[x]
+
+			var colour *[3]float32
+			var alpha float32 = 0.6
+
+			if y == int(a.hint.StartY) {
+				if x >= int(a.hint.StartX) && x <= int(a.hint.StartX+uint16(len(a.hint.Word))) {
+					colour = &[3]float32{0.2, 1.0, 0.2}
+					alpha = 1.0
+				}
+			}
+			gui.renderer.DrawCellText(cell, uint(x), uint(y), alpha, colour)
+		}
+	}
+
+	gui.textbox(a.hint.StartX+1, a.hint.StartY+3, a.hint.Description)
+
+}

gui/gui.go

@@ -3,6 +3,7 @@ package gui
 import (
 	"bytes"
 	"fmt"
+	"os/exec"
 	"runtime"
 	"time"
 
@@ -18,29 +19,32 @@ import (
 )
 
 type GUI struct {
-	window     *glfw.Window
+	window        *glfw.Window
-	logger     *zap.SugaredLogger
+	logger        *zap.SugaredLogger
-	config     *config.Config
+	config        *config.Config
-	terminal   *terminal.Terminal
+	terminal      *terminal.Terminal
-	width      int //window width in pixels
+	width         int //window width in pixels
-	height     int //window height in pixels
+	height        int //window height in pixels
-	font       *glfont.Font
+	font          *glfont.Font
-	boldFont   *glfont.Font
+	boldFont      *glfont.Font
-	fontScale  float32
+	fontScale     float32
-	renderer   *OpenGLRenderer
+	renderer      *OpenGLRenderer
-	colourAttr uint32
+	colourAttr    uint32
-	mouseDown  bool
+	mouseDown     bool
+	overlay       overlay
+	terminalAlpha float32
 }
 
 func New(config *config.Config, terminal *terminal.Terminal, logger *zap.SugaredLogger) *GUI {
 
 	return &GUI{
-		config:    config,
+		config:        config,
-		logger:    logger,
+		logger:        logger,
-		width:     800,
+		width:         800,
-		height:    600,
+		height:        600,
-		terminal:  terminal,
+		terminal:      terminal,
-		fontScale: 14.0,
+		fontScale:     14.0,
+		terminalAlpha: 1,
 	}
 }
 
@@ -87,14 +91,6 @@ func (gui *GUI) resize(w *glfw.Window, width int, height int) {
 
 }
 
-func (gui *GUI) glfwScrollCallback(w *glfw.Window, xoff float64, yoff float64) {
-	if yoff > 0 {
-		gui.terminal.ScrollUp(1)
-	} else {
-		gui.terminal.ScrollDown(1)
-	}
-}
-
 func (gui *GUI) getTermSize() (uint, uint) {
 	if gui.renderer == nil {
 		return 0, 0
@@ -242,9 +238,9 @@ func (gui *GUI) Render() error {
 						colour = &gui.config.ColourScheme.Selection
 					}
 
-					gui.renderer.DrawCellBg(cell, uint(x), uint(y), cursor, colour)
+					gui.renderer.DrawCellBg(cell, uint(x), uint(y), cursor, colour, false)
 					if hasText {
-						gui.renderer.DrawCellText(cell, uint(x), uint(y), nil)
+						gui.renderer.DrawCellText(cell, uint(x), uint(y), 1.0, nil)
 					}
 
 					gui.renderer.DrawCellImage(cell, uint(x), uint(y))
@@ -252,6 +248,8 @@ func (gui *GUI) Render() error {
 				}
 			}
 
+			gui.renderOverlay()
+
 			gui.window.SwapBuffers()
 
 		}
@@ -340,3 +338,19 @@ func (gui *GUI) createProgram() (uint32, error) {
 
 	return prog, nil
 }
+
+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)
+	}
+}

gui/input.go

@@ -2,6 +2,7 @@ package gui
 
 import (
 	"fmt"
+	"net/url"
 
 	"github.com/go-gl/glfw/v3.2/glfw"
 )
@@ -22,8 +23,15 @@ func modsPressed(pressed glfw.ModifierKey, mods ...glfw.ModifierKey) bool {
 }
 
 func (gui *GUI) key(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
+
 	if action == glfw.Repeat || action == glfw.Press {
 
+		if gui.overlay != nil {
+			if key == glfw.KeyEscape {
+				gui.setOverlay(nil)
+			}
+		}
+
 		gui.logger.Debugf("KEY PRESS: key=0x%X scan=0x%X", key, scancode)
 
 		modStr := ""
@@ -39,6 +47,13 @@ func (gui *GUI) key(w *glfw.Window, key glfw.Key, scancode int, action glfw.Acti
 			case glfw.KeyC:
 				gui.window.SetClipboardString(gui.terminal.ActiveBuffer().GetSelectedText())
 				return
+			case glfw.KeyG:
+				keywords := gui.terminal.ActiveBuffer().GetSelectedText()
+				if keywords != "" {
+					gui.launchTarget(fmt.Sprintf("https://www.google.com/search?q=%s", url.QueryEscape(keywords)))
+				}
+			case glfw.KeyR:
+				gui.launchTarget("https://github.com/liamg/aminal/issues/new/choose")
 			case glfw.KeyV:
 				if s, err := gui.window.GetClipboardString(); err == nil {
 					_ = gui.terminal.Paste([]byte(s))

gui/mouse.go

@@ -3,20 +3,39 @@ package gui
 import (
 	"fmt"
 	"math"
-	"os/exec"
-	"runtime"
 
 	"github.com/go-gl/glfw/v3.2/glfw"
 	"github.com/liamg/aminal/terminal"
 )
 
+func (gui *GUI) glfwScrollCallback(w *glfw.Window, xoff float64, yoff float64) {
+
+	if yoff > 0 {
+		gui.terminal.ScrollUp(1)
+	} else {
+		gui.terminal.ScrollDown(1)
+	}
+}
+
 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 {
 		gui.terminal.ActiveBuffer().EndSelection(x, y, false)
+	} else {
+
+		if gui.terminal.UsingMainBuffer() {
+			hint := gui.terminal.ActiveBuffer().GetHintAtPosition(x, y)
+			if hint != nil {
+				gui.setOverlay(newAnnotation(hint))
+			} else {
+				gui.setOverlay(nil)
+			}
+		}
+
 	}
 
 	if url := gui.terminal.ActiveBuffer().GetURLAtPosition(x, y); url != "" {
@@ -26,24 +45,15 @@ func (gui *GUI) mouseMoveCallback(w *glfw.Window, xpos float64, ypos float64) {
 	}
 }
 
-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) {
 
+	if gui.overlay != nil {
+		if button == glfw.MouseButtonRight && action == glfw.Release {
+			gui.setOverlay(nil)
+		}
+		return
+	}
+
 	// before we forward clicks on (below), we need to handle them locally for url clicking, text highlighting etc.
 	px, py := w.GetCursorPos()
 	x := uint16(math.Floor((px - float64(gui.renderer.areaX)) / float64(gui.renderer.CellWidth())))
@@ -51,14 +61,17 @@ func (gui *GUI) mouseButtonCallback(w *glfw.Window, button glfw.MouseButton, act
 	tx := int(x) + 1 // vt100 is 1 indexed
 	ty := int(y) + 1
 
-	if action == glfw.Press {
+	if button == glfw.MouseButtonLeft {
-		gui.mouseDown = true
+
-		gui.terminal.ActiveBuffer().StartSelection(x, y)
+		if action == glfw.Press {
-	} else if action == glfw.Release {
+			gui.mouseDown = true
-		gui.mouseDown = false
+			gui.terminal.ActiveBuffer().StartSelection(x, y)
-		gui.terminal.ActiveBuffer().EndSelection(x, y, true)
+		} else if action == glfw.Release {
-		if url := gui.terminal.ActiveBuffer().GetURLAtPosition(x, y); url != "" {
+			gui.mouseDown = false
-			go gui.launchTarget(url)
+			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

gui/overlays.go

@@ -0,0 +1,18 @@
+package gui
+
+type overlay interface {
+	render(gui *GUI)
+}
+
+func (gui *GUI) setOverlay(m overlay) {
+	defer gui.terminal.SetDirty()
+	gui.overlay = m
+}
+
+func (gui *GUI) renderOverlay() {
+	if gui.overlay == nil || !gui.terminal.UsingMainBuffer() {
+		return
+	}
+
+	gui.overlay.render(gui)
+}

gui/renderer.go

@@ -195,7 +195,7 @@ func (r *OpenGLRenderer) DrawCursor(col uint, row uint, colour config.Colour) {
 	rect.Draw()
 }
 
-func (r *OpenGLRenderer) DrawCellBg(cell buffer.Cell, col uint, row uint, cursor bool, colour *config.Colour) {
+func (r *OpenGLRenderer) DrawCellBg(cell buffer.Cell, col uint, row uint, cursor bool, colour *config.Colour, force bool) {
 
 	var bg [3]float32
 
@@ -212,7 +212,7 @@ func (r *OpenGLRenderer) DrawCellBg(cell buffer.Cell, col uint, row uint, cursor
 		}
 	}
 
-	if bg != r.config.ColourScheme.Background {
+	if bg != r.config.ColourScheme.Background || force {
 		rect := r.getRectangle(col, row)
 		rect.setColour(bg)
 		rect.Draw()
@@ -220,23 +220,20 @@ func (r *OpenGLRenderer) DrawCellBg(cell buffer.Cell, col uint, row uint, cursor
 
 }
 
-func (r *OpenGLRenderer) DrawCellText(cell buffer.Cell, col uint, row uint, colour *config.Colour) {
+func (r *OpenGLRenderer) DrawCellText(cell buffer.Cell, col uint, row uint, alpha float32, colour *[3]float32) {
 
 	var fg [3]float32
 
 	if colour != nil {
 		fg = *colour
+	} else if cell.Attr().Reverse {
+		fg = cell.Bg()
 	} else {
-		if cell.Attr().Reverse {
+		fg = cell.Fg()
-			fg = cell.Bg()
-		} else {
-			fg = cell.Fg()
-		}
 	}
 
-	var alpha float32 = 1
 	if cell.Attr().Dim {
-		alpha = 0.5
+		alpha = 0.5 * alpha
 	}
 	r.font.SetColor(fg[0], fg[1], fg[2], alpha)
 

gui/textbox.go

@@ -0,0 +1,97 @@
+package gui
+
+import (
+	"fmt"
+
+	"github.com/liamg/aminal/buffer"
+)
+
+func (gui *GUI) textbox(col uint16, row uint16, text string) {
+
+	lines := []string{}
+	line := ""
+	word := ""
+
+	maxWidth := int(gui.terminal.ActiveBuffer().ViewWidth()) - 4
+	maxHeight := (int(gui.terminal.ActiveBuffer().ViewHeight()) / 2) - 2
+
+	if maxHeight < 1 {
+		return
+	}
+
+	longestLine := 0
+
+	addWord := func() {
+		if len(line)+len(word) <= maxWidth {
+			line = fmt.Sprintf("%s%s", line, word)
+			if len(line) < maxWidth {
+				line = fmt.Sprintf("%s ", line)
+			} else {
+				lines = append(lines, line)
+				line = ""
+			}
+		} else {
+			lines = append(lines, line)
+			line = word
+			for len(line) > maxWidth {
+				// break word into bits
+			}
+		}
+
+		word = ""
+	}
+
+	addLine := func() bool {
+		addWord()
+		if len(line) > longestLine {
+			longestLine = len(line)
+		}
+		lines = append(lines, line)
+		if len(lines) >= maxHeight-1 {
+			lines = append(lines, "...")
+			return true
+		}
+		line = ""
+		return false
+	}
+
+	var done = false
+
+DONE:
+	for _, c := range text {
+		switch c {
+		case 0x0d:
+			continue
+		case 0x0a:
+			if done = addLine(); done {
+				break DONE
+			}
+		case ' ':
+			addWord()
+		default:
+			word = fmt.Sprintf("%s%c", word, c)
+		}
+	}
+	if word != "" {
+		addWord()
+	}
+	if line != "" && !done {
+		addLine()
+	}
+
+	for hx := col; hx < col+uint16(longestLine)+2; hx++ {
+		for hy := row - 1; hy < row+uint16(len(lines))+1; hy++ {
+			gui.renderer.DrawCellBg(buffer.NewBackgroundCell([3]float32{0, 0, 0}), uint(hx), uint(hy), false, nil, true)
+		}
+	}
+
+	x := (float32(col) * gui.renderer.cellWidth)
+
+	gui.font.SetColor(0.2, 1, 0.2, 1)
+
+	for i, line := range lines {
+		y := (float32(row+1+uint16(i)) * gui.renderer.cellHeight) - (gui.font.LinePadding())
+		gui.font.Print(x, y, fmt.Sprintf(" %s", line))
+	}
+
+}

hints/hint.go

@@ -0,0 +1,22 @@
+package hints
+
+type Hint struct {
+	Word        string
+	StartX      uint16
+	StartY      uint16
+	Line        string
+	Description string
+}
+
+type hinter func(word string, context string, wordX uint16, wordY uint16) *Hint
+
+var hinters = []hinter{}
+
+func Get(word string, context string, wordX uint16, wordY uint16) *Hint {
+	for _, exp := range hinters {
+		if h := exp(word, context, wordX, wordY); h != nil {
+			return h
+		}
+	}
+	return nil
+}

hints/perms.go

@@ -0,0 +1,122 @@
+package hints
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+type perms struct {
+	IsDirectory bool
+	Owner       access
+	Group       access
+	World       access
+}
+
+type access struct {
+	Read    bool
+	Write   bool
+	Execute bool
+}
+
+func (p perms) Numeric() string {
+	return p.Owner.Numeric() + p.Group.Numeric() + p.World.Numeric()
+}
+
+func (a access) Nice() string {
+	all := []string{}
+	if a.Read {
+		all = append(all, "read")
+	}
+	if a.Write {
+		all = append(all, "write")
+	}
+	if a.Execute {
+		all = append(all, "execute")
+	}
+
+	return strings.Join(all, ", ")
+}
+
+func (a access) Numeric() string {
+	var n uint8
+	if a.Read {
+		n += 4
+	}
+	if a.Write {
+		n += 2
+	}
+	if a.Execute {
+		n++
+	}
+	return fmt.Sprintf("%d", n)
+}
+
+func parsePermissionString(s string) (perms, error) {
+	if !isPermString(s) {
+		return perms{}, fmt.Errorf("Invalid permission string")
+	}
+	p := perms{}
+	p.IsDirectory = s[0] == 'd'
+
+	p.Owner.Read = s[1] == 'r'
+	p.Owner.Write = s[2] == 'w'
+	p.Owner.Execute = s[3] == 'x'
+	p.Group.Read = s[4] == 'r'
+	p.Group.Write = s[5] == 'w'
+	p.Group.Execute = s[6] == 'x'
+	p.World.Read = s[7] == 'r'
+	p.World.Write = s[8] == 'w'
+	p.World.Execute = s[9] == 'x'
+
+	return p, nil
+}
+
+func init() {
+	hinters = append(hinters, hintPerms)
+}
+
+func hintPerms(word string, context string, wordX uint16, wordY uint16) *Hint {
+
+	item := &Hint{
+		Line:   context,
+		Word:   word,
+		StartX: wordX,
+		StartY: wordY,
+	}
+
+	if wordX == 0 {
+
+		p, err := parsePermissionString(word)
+		if err != nil {
+			return nil
+		}
+
+		typ := "file"
+		if p.IsDirectory {
+			typ = "directory"
+		}
+
+		item.Description = fmt.Sprintf(`Permissions: 
+  Type:    %s
+  Numeric: %s
+  Owner:   %s
+  Group:   %s
+  World:   %s`,
+			typ,
+			p.Numeric(),
+			p.Owner.Nice(),
+			p.Group.Nice(),
+			p.World.Nice(),
+		)
+
+		return item
+	}
+
+	return nil
+}
+
+func isPermString(s string) bool {
+	re := regexp.MustCompile("[dl\\-sS]{1}[sSrwx\\-]{9}")
+	return re.MatchString(s)
+}

terminal/terminal.go

@@ -16,8 +16,9 @@ import (
 )
 
 const (
-	MainBuffer uint8 = 0
+	MainBuffer     uint8 = 0
-	AltBuffer  uint8 = 1
+	AltBuffer      uint8 = 1
+	InternalBuffer uint8 = 2
 )
 
 type MouseMode uint
@@ -50,6 +51,7 @@ type Terminal struct {
 	isDirty            bool
 	charWidth          float32
 	charHeight         float32
+	lastBuffer         uint8
 }
 
 type Modes struct {
@@ -77,6 +79,10 @@ func New(pty *os.File, logger *zap.SugaredLogger, config *config.Config) *Termin
 				FgColour: config.ColourScheme.Foreground,
 				BgColour: config.ColourScheme.Background,
 			}),
+			buffer.NewBuffer(1, 1, buffer.CellAttributes{
+				FgColour: config.ColourScheme.Foreground,
+				BgColour: config.ColourScheme.Background,
+			}),
 		},
 		pty:           pty,
 		logger:        logger,
@@ -131,16 +137,30 @@ func (terminal *Terminal) UseAltBuffer() {
 	terminal.SetSize(uint(terminal.size.Width), uint(terminal.size.Height))
 }
 
+func (terminal *Terminal) UseInternalBuffer() {
+	terminal.pauseChan <- true
+	terminal.activeBufferIndex = InternalBuffer
+	terminal.SetSize(uint(terminal.size.Width), uint(terminal.size.Height))
+}
+
+func (terminal *Terminal) ExitInternalBuffer() {
+	terminal.activeBufferIndex = terminal.lastBuffer
+	terminal.resumeChan <- true
+}
+
 func (terminal *Terminal) ActiveBuffer() *buffer.Buffer {
 	return terminal.buffers[terminal.activeBufferIndex]
 }
 
+func (terminal *Terminal) UsingMainBuffer() bool {
+	return terminal.activeBufferIndex == MainBuffer
+}
+
 func (terminal *Terminal) GetScrollOffset() uint {
 	return terminal.ActiveBuffer().GetScrollOffset()
 }
 
 func (terminal *Terminal) ScrollDown(lines uint16) {
-	terminal.logger.Infof("Scrolling down %d", lines)
 	terminal.ActiveBuffer().ScrollDown(lines)
 
 }
@@ -151,7 +171,6 @@ func (terminal *Terminal) SetCharSize(w float32, h float32) {
 }
 
 func (terminal *Terminal) ScrollUp(lines uint16) {
-	terminal.logger.Infof("Scrolling up %d", lines)
 	terminal.ActiveBuffer().ScrollUp(lines)
 }