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Action subpackage
This commit is contained in:
Zachary Yedidia
206
cmd/micro/action/bufhandler.go
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206
cmd/micro/action/bufhandler.go
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package action
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import (
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"time"
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"github.com/zyedidia/micro/cmd/micro/buffer"
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"github.com/zyedidia/tcell"
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)
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type BufKeyAction func(*BufHandler) bool
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type BufMouseAction func(*BufHandler, *tcell.EventMouse) bool
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var BufKeyBindings map[KeyEvent]BufKeyAction
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var BufMouseBindings map[MouseEvent]BufMouseAction
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func init() {
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BufKeyBindings = make(map[KeyEvent]BufKeyAction)
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BufMouseBindings = make(map[MouseEvent]BufMouseAction)
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}
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func BufMapKey(k KeyEvent, action string) {
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BufKeyBindings[k] = BufKeyActions[action]
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}
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func BufMapMouse(k MouseEvent, action string) {
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BufMouseBindings[k] = BufMouseActions[action]
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}
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// The BufHandler connects the buffer and the window
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// It provides a cursor (or multiple) and defines a set of actions
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// that can be taken on the buffer
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// The ActionHandler can access the window for necessary info about
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// visual positions for mouse clicks and scrolling
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type BufHandler struct {
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Buf *buffer.Buffer
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cursors []*buffer.Cursor
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Cursor *buffer.Cursor // the active cursor
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// Since tcell doesn't differentiate between a mouse release event
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// and a mouse move event with no keys pressed, we need to keep
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// track of whether or not the mouse was pressed (or not released) last event to determine
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// mouse release events
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mouseReleased bool
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// We need to keep track of insert key press toggle
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isOverwriteMode bool
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// This stores when the last click was
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// This is useful for detecting double and triple clicks
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lastClickTime time.Time
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lastLoc buffer.Loc
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// lastCutTime stores when the last ctrl+k was issued.
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// It is used for clearing the clipboard to replace it with fresh cut lines.
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lastCutTime time.Time
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// freshClip returns true if the clipboard has never been pasted.
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freshClip bool
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// Was the last mouse event actually a double click?
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// Useful for detecting triple clicks -- if a double click is detected
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// but the last mouse event was actually a double click, it's a triple click
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doubleClick bool
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// Same here, just to keep track for mouse move events
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tripleClick bool
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}
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func NewBufHandler(buf *buffer.Buffer) *BufHandler {
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a := new(BufHandler)
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a.Buf = buf
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a.cursors = []*buffer.Cursor{&buffer.Cursor{
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Buf: buf,
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Loc: buf.StartCursor,
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}}
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a.Cursor = a.cursors[0]
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buf.SetCursors(a.cursors)
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return a
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}
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// HandleEvent executes the tcell event properly
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// TODO: multiple actions bound to one key
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func (a *BufHandler) HandleEvent(event tcell.Event) {
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switch e := event.(type) {
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case *tcell.EventKey:
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ke := KeyEvent{
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code: e.Key(),
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mod: e.Modifiers(),
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r: e.Rune(),
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}
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if action, ok := BufKeyBindings[ke]; ok {
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action(a)
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}
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case *tcell.EventMouse:
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me := MouseEvent{
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btn: e.Buttons(),
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mod: e.Modifiers(),
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}
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if action, ok := BufMouseBindings[me]; ok {
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action(a, e)
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}
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}
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}
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var BufKeyActions = map[string]BufKeyAction{
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"CursorUp": (*BufHandler).CursorUp,
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"CursorDown": (*BufHandler).CursorDown,
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"CursorPageUp": (*BufHandler).CursorPageUp,
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"CursorPageDown": (*BufHandler).CursorPageDown,
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"CursorLeft": (*BufHandler).CursorLeft,
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"CursorRight": (*BufHandler).CursorRight,
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"CursorStart": (*BufHandler).CursorStart,
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"CursorEnd": (*BufHandler).CursorEnd,
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"SelectToStart": (*BufHandler).SelectToStart,
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"SelectToEnd": (*BufHandler).SelectToEnd,
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"SelectUp": (*BufHandler).SelectUp,
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"SelectDown": (*BufHandler).SelectDown,
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"SelectLeft": (*BufHandler).SelectLeft,
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"SelectRight": (*BufHandler).SelectRight,
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"WordRight": (*BufHandler).WordRight,
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"WordLeft": (*BufHandler).WordLeft,
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"SelectWordRight": (*BufHandler).SelectWordRight,
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"SelectWordLeft": (*BufHandler).SelectWordLeft,
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"DeleteWordRight": (*BufHandler).DeleteWordRight,
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"DeleteWordLeft": (*BufHandler).DeleteWordLeft,
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"SelectLine": (*BufHandler).SelectLine,
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"SelectToStartOfLine": (*BufHandler).SelectToStartOfLine,
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"SelectToEndOfLine": (*BufHandler).SelectToEndOfLine,
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"ParagraphPrevious": (*BufHandler).ParagraphPrevious,
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"ParagraphNext": (*BufHandler).ParagraphNext,
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"InsertNewline": (*BufHandler).InsertNewline,
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"InsertSpace": (*BufHandler).InsertSpace,
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"Backspace": (*BufHandler).Backspace,
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"Delete": (*BufHandler).Delete,
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"InsertTab": (*BufHandler).InsertTab,
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"Save": (*BufHandler).Save,
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"SaveAll": (*BufHandler).SaveAll,
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"SaveAs": (*BufHandler).SaveAs,
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"Find": (*BufHandler).Find,
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"FindNext": (*BufHandler).FindNext,
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"FindPrevious": (*BufHandler).FindPrevious,
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"Center": (*BufHandler).Center,
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"Undo": (*BufHandler).Undo,
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"Redo": (*BufHandler).Redo,
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"Copy": (*BufHandler).Copy,
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"Cut": (*BufHandler).Cut,
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"CutLine": (*BufHandler).CutLine,
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"DuplicateLine": (*BufHandler).DuplicateLine,
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"DeleteLine": (*BufHandler).DeleteLine,
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"MoveLinesUp": (*BufHandler).MoveLinesUp,
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"MoveLinesDown": (*BufHandler).MoveLinesDown,
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"IndentSelection": (*BufHandler).IndentSelection,
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"OutdentSelection": (*BufHandler).OutdentSelection,
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"OutdentLine": (*BufHandler).OutdentLine,
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"Paste": (*BufHandler).Paste,
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"PastePrimary": (*BufHandler).PastePrimary,
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"SelectAll": (*BufHandler).SelectAll,
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"OpenFile": (*BufHandler).OpenFile,
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"Start": (*BufHandler).Start,
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"End": (*BufHandler).End,
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"PageUp": (*BufHandler).PageUp,
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"PageDown": (*BufHandler).PageDown,
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"SelectPageUp": (*BufHandler).SelectPageUp,
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"SelectPageDown": (*BufHandler).SelectPageDown,
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"HalfPageUp": (*BufHandler).HalfPageUp,
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"HalfPageDown": (*BufHandler).HalfPageDown,
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"StartOfLine": (*BufHandler).StartOfLine,
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"EndOfLine": (*BufHandler).EndOfLine,
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"ToggleHelp": (*BufHandler).ToggleHelp,
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"ToggleKeyMenu": (*BufHandler).ToggleKeyMenu,
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"ToggleRuler": (*BufHandler).ToggleRuler,
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"JumpLine": (*BufHandler).JumpLine,
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"ClearStatus": (*BufHandler).ClearStatus,
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"ShellMode": (*BufHandler).ShellMode,
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"CommandMode": (*BufHandler).CommandMode,
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"ToggleOverwriteMode": (*BufHandler).ToggleOverwriteMode,
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"Escape": (*BufHandler).Escape,
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"Quit": (*BufHandler).Quit,
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"QuitAll": (*BufHandler).QuitAll,
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"AddTab": (*BufHandler).AddTab,
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"PreviousTab": (*BufHandler).PreviousTab,
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"NextTab": (*BufHandler).NextTab,
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"NextSplit": (*BufHandler).NextSplit,
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"PreviousSplit": (*BufHandler).PreviousSplit,
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"Unsplit": (*BufHandler).Unsplit,
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"VSplit": (*BufHandler).VSplitBinding,
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"HSplit": (*BufHandler).HSplitBinding,
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"ToggleMacro": (*BufHandler).ToggleMacro,
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"PlayMacro": (*BufHandler).PlayMacro,
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"Suspend": (*BufHandler).Suspend,
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"ScrollUp": (*BufHandler).ScrollUpAction,
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"ScrollDown": (*BufHandler).ScrollDownAction,
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"SpawnMultiCursor": (*BufHandler).SpawnMultiCursor,
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"SpawnMultiCursorSelect": (*BufHandler).SpawnMultiCursorSelect,
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"RemoveMultiCursor": (*BufHandler).RemoveMultiCursor,
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"RemoveAllMultiCursors": (*BufHandler).RemoveAllMultiCursors,
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"SkipMultiCursor": (*BufHandler).SkipMultiCursor,
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"JumpToMatchingBrace": (*BufHandler).JumpToMatchingBrace,
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// This was changed to InsertNewline but I don't want to break backwards compatibility
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"InsertEnter": (*BufHandler).InsertNewline,
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}
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var BufMouseActions = map[string]BufMouseAction{
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"MousePress": (*BufHandler).MousePress,
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"MouseMultiCursor": (*BufHandler).MouseMultiCursor,
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}
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