cmd/micro/bufactionhandler.go

   1 package main
   2
   3 import (
   4         "time"
   5
   6         "github.com/zyedidia/micro/cmd/micro/buffer"
   7         "github.com/zyedidia/tcell"
   8 )
   9
  10 type BufKeyAction func(*BufActionHandler) bool
  11 type BufMouseAction func(*BufActionHandler, *tcell.EventMouse) bool
  12
  13 var BufKeyBindings map[KeyEvent]BufKeyAction
  14 var BufMouseBindings map[MouseEvent]BufMouseAction
  15
  16 func init() {
  17         BufKeyBindings = make(map[KeyEvent]BufKeyAction)
  18         BufMouseBindings = make(map[MouseEvent]BufMouseAction)
  19 }
  20
  21 func BufMapKey(k KeyEvent, action string) {
  22         BufKeyBindings[k] = BufKeyActions[action]
  23 }
  24 func BufMapMouse(k MouseEvent, action string) {
  25         BufMouseBindings[k] = BufMouseActions[action]
  26 }
  27
  28 // The BufActionHandler connects the buffer and the window
  29 // It provides a cursor (or multiple) and defines a set of actions
  30 // that can be taken on the buffer
  31 // The ActionHandler can access the window for necessary info about
  32 // visual positions for mouse clicks and scrolling
  33 type BufActionHandler struct {
  34         Buf *buffer.Buffer
  35         Win *Window
  36
  37         cursors []*buffer.Cursor
  38         Cursor  *buffer.Cursor // the active cursor
  39
  40         // Since tcell doesn't differentiate between a mouse release event
  41         // and a mouse move event with no keys pressed, we need to keep
  42         // track of whether or not the mouse was pressed (or not released) last event to determine
  43         // mouse release events
  44         mouseReleased bool
  45
  46         // We need to keep track of insert key press toggle
  47         isOverwriteMode bool
  48         // This stores when the last click was
  49         // This is useful for detecting double and triple clicks
  50         lastClickTime time.Time
  51         lastLoc       buffer.Loc
  52
  53         // lastCutTime stores when the last ctrl+k was issued.
  54         // It is used for clearing the clipboard to replace it with fresh cut lines.
  55         lastCutTime time.Time
  56
  57         // freshClip returns true if the clipboard has never been pasted.
  58         freshClip bool
  59
  60         // Was the last mouse event actually a double click?
  61         // Useful for detecting triple clicks -- if a double click is detected
  62         // but the last mouse event was actually a double click, it's a triple click
  63         doubleClick bool
  64         // Same here, just to keep track for mouse move events
  65         tripleClick bool
  66 }
  67
  68 func NewBufActionHandler(buf *buffer.Buffer, win *Window) *BufActionHandler {
  69         a := new(BufActionHandler)
  70         a.Buf = buf
  71         a.Win = win
  72
  73         a.cursors = []*buffer.Cursor{&buffer.Cursor{
  74                 Buf: buf,
  75                 Loc: buf.StartCursor,
  76         }}
  77         a.Cursor = a.cursors[0]
  78
  79         buf.SetCursors(a.cursors)
  80         return a
  81 }
  82
  83 // HandleEvent executes the tcell event properly
  84 // TODO: multiple actions bound to one key
  85 func (a *BufActionHandler) HandleEvent(event tcell.Event) {
  86         switch e := event.(type) {
  87         case *tcell.EventKey:
  88                 ke := KeyEvent{
  89                         code: e.Key(),
  90                         mod:  e.Modifiers(),
  91                         r:    e.Rune(),
  92                 }
  93                 if action, ok := BufKeyBindings[ke]; ok {
  94                         action(a)
  95                 }
  96         case *tcell.EventMouse:
  97                 me := MouseEvent{
  98                         btn: e.Buttons(),
  99                         mod: e.Modifiers(),
 100                 }
 101                 if action, ok := BufMouseBindings[me]; ok {
 102                         action(a, e)
 103                 }
 104         }
 105 }
 106
 107 var BufKeyActions = map[string]BufKeyAction{
 108         "CursorUp":               (*BufActionHandler).CursorUp,
 109         "CursorDown":             (*BufActionHandler).CursorDown,
 110         "CursorPageUp":           (*BufActionHandler).CursorPageUp,
 111         "CursorPageDown":         (*BufActionHandler).CursorPageDown,
 112         "CursorLeft":             (*BufActionHandler).CursorLeft,
 113         "CursorRight":            (*BufActionHandler).CursorRight,
 114         "CursorStart":            (*BufActionHandler).CursorStart,
 115         "CursorEnd":              (*BufActionHandler).CursorEnd,
 116         "SelectToStart":          (*BufActionHandler).SelectToStart,
 117         "SelectToEnd":            (*BufActionHandler).SelectToEnd,
 118         "SelectUp":               (*BufActionHandler).SelectUp,
 119         "SelectDown":             (*BufActionHandler).SelectDown,
 120         "SelectLeft":             (*BufActionHandler).SelectLeft,
 121         "SelectRight":            (*BufActionHandler).SelectRight,
 122         "WordRight":              (*BufActionHandler).WordRight,
 123         "WordLeft":               (*BufActionHandler).WordLeft,
 124         "SelectWordRight":        (*BufActionHandler).SelectWordRight,
 125         "SelectWordLeft":         (*BufActionHandler).SelectWordLeft,
 126         "DeleteWordRight":        (*BufActionHandler).DeleteWordRight,
 127         "DeleteWordLeft":         (*BufActionHandler).DeleteWordLeft,
 128         "SelectLine":             (*BufActionHandler).SelectLine,
 129         "SelectToStartOfLine":    (*BufActionHandler).SelectToStartOfLine,
 130         "SelectToEndOfLine":      (*BufActionHandler).SelectToEndOfLine,
 131         "ParagraphPrevious":      (*BufActionHandler).ParagraphPrevious,
 132         "ParagraphNext":          (*BufActionHandler).ParagraphNext,
 133         "InsertNewline":          (*BufActionHandler).InsertNewline,
 134         "InsertSpace":            (*BufActionHandler).InsertSpace,
 135         "Backspace":              (*BufActionHandler).Backspace,
 136         "Delete":                 (*BufActionHandler).Delete,
 137         "InsertTab":              (*BufActionHandler).InsertTab,
 138         "Save":                   (*BufActionHandler).Save,
 139         "SaveAll":                (*BufActionHandler).SaveAll,
 140         "SaveAs":                 (*BufActionHandler).SaveAs,
 141         "Find":                   (*BufActionHandler).Find,
 142         "FindNext":               (*BufActionHandler).FindNext,
 143         "FindPrevious":           (*BufActionHandler).FindPrevious,
 144         "Center":                 (*BufActionHandler).Center,
 145         "Undo":                   (*BufActionHandler).Undo,
 146         "Redo":                   (*BufActionHandler).Redo,
 147         "Copy":                   (*BufActionHandler).Copy,
 148         "Cut":                    (*BufActionHandler).Cut,
 149         "CutLine":                (*BufActionHandler).CutLine,
 150         "DuplicateLine":          (*BufActionHandler).DuplicateLine,
 151         "DeleteLine":             (*BufActionHandler).DeleteLine,
 152         "MoveLinesUp":            (*BufActionHandler).MoveLinesUp,
 153         "MoveLinesDown":          (*BufActionHandler).MoveLinesDown,
 154         "IndentSelection":        (*BufActionHandler).IndentSelection,
 155         "OutdentSelection":       (*BufActionHandler).OutdentSelection,
 156         "OutdentLine":            (*BufActionHandler).OutdentLine,
 157         "Paste":                  (*BufActionHandler).Paste,
 158         "PastePrimary":           (*BufActionHandler).PastePrimary,
 159         "SelectAll":              (*BufActionHandler).SelectAll,
 160         "OpenFile":               (*BufActionHandler).OpenFile,
 161         "Start":                  (*BufActionHandler).Start,
 162         "End":                    (*BufActionHandler).End,
 163         "PageUp":                 (*BufActionHandler).PageUp,
 164         "PageDown":               (*BufActionHandler).PageDown,
 165         "SelectPageUp":           (*BufActionHandler).SelectPageUp,
 166         "SelectPageDown":         (*BufActionHandler).SelectPageDown,
 167         "HalfPageUp":             (*BufActionHandler).HalfPageUp,
 168         "HalfPageDown":           (*BufActionHandler).HalfPageDown,
 169         "StartOfLine":            (*BufActionHandler).StartOfLine,
 170         "EndOfLine":              (*BufActionHandler).EndOfLine,
 171         "ToggleHelp":             (*BufActionHandler).ToggleHelp,
 172         "ToggleKeyMenu":          (*BufActionHandler).ToggleKeyMenu,
 173         "ToggleRuler":            (*BufActionHandler).ToggleRuler,
 174         "JumpLine":               (*BufActionHandler).JumpLine,
 175         "ClearStatus":            (*BufActionHandler).ClearStatus,
 176         "ShellMode":              (*BufActionHandler).ShellMode,
 177         "CommandMode":            (*BufActionHandler).CommandMode,
 178         "ToggleOverwriteMode":    (*BufActionHandler).ToggleOverwriteMode,
 179         "Escape":                 (*BufActionHandler).Escape,
 180         "Quit":                   (*BufActionHandler).Quit,
 181         "QuitAll":                (*BufActionHandler).QuitAll,
 182         "AddTab":                 (*BufActionHandler).AddTab,
 183         "PreviousTab":            (*BufActionHandler).PreviousTab,
 184         "NextTab":                (*BufActionHandler).NextTab,
 185         "NextSplit":              (*BufActionHandler).NextSplit,
 186         "PreviousSplit":          (*BufActionHandler).PreviousSplit,
 187         "Unsplit":                (*BufActionHandler).Unsplit,
 188         "VSplit":                 (*BufActionHandler).VSplitBinding,
 189         "HSplit":                 (*BufActionHandler).HSplitBinding,
 190         "ToggleMacro":            (*BufActionHandler).ToggleMacro,
 191         "PlayMacro":              (*BufActionHandler).PlayMacro,
 192         "Suspend":                (*BufActionHandler).Suspend,
 193         "ScrollUp":               (*BufActionHandler).ScrollUpAction,
 194         "ScrollDown":             (*BufActionHandler).ScrollDownAction,
 195         "SpawnMultiCursor":       (*BufActionHandler).SpawnMultiCursor,
 196         "SpawnMultiCursorSelect": (*BufActionHandler).SpawnMultiCursorSelect,
 197         "RemoveMultiCursor":      (*BufActionHandler).RemoveMultiCursor,
 198         "RemoveAllMultiCursors":  (*BufActionHandler).RemoveAllMultiCursors,
 199         "SkipMultiCursor":        (*BufActionHandler).SkipMultiCursor,
 200         "JumpToMatchingBrace":    (*BufActionHandler).JumpToMatchingBrace,
 201
 202         // This was changed to InsertNewline but I don't want to break backwards compatibility
 203         "InsertEnter": (*BufActionHandler).InsertNewline,
 204 }
 205 var BufMouseActions = map[string]BufMouseAction{
 206         "MousePress":       (*BufActionHandler).MousePress,
 207         "MouseMultiCursor": (*BufActionHandler).MouseMultiCursor,
 208 }