| Current File : //usr/share/nodejs/codemirror/src/edit/mouse_events.js |
import { delayBlurEvent, ensureFocus } from "../display/focus.js"
import { operation } from "../display/operations.js"
import { visibleLines } from "../display/update_lines.js"
import { clipPos, cmp, maxPos, minPos, Pos } from "../line/pos.js"
import { getLine, lineAtHeight } from "../line/utils_line.js"
import { posFromMouse } from "../measurement/position_measurement.js"
import { eventInWidget } from "../measurement/widgets.js"
import { normalizeSelection, Range, Selection } from "../model/selection.js"
import { extendRange, extendSelection, replaceOneSelection, setSelection } from "../model/selection_updates.js"
import { captureRightClick, chromeOS, ie, ie_version, mac, webkit, safari } from "../util/browser.js"
import { getOrder, getBidiPartAt } from "../util/bidi.js"
import { activeElt } from "../util/dom.js"
import { e_button, e_defaultPrevented, e_preventDefault, e_target, hasHandler, off, on, signal, signalDOMEvent } from "../util/event.js"
import { dragAndDrop } from "../util/feature_detection.js"
import { bind, countColumn, findColumn, sel_mouse } from "../util/misc.js"
import { addModifierNames } from "../input/keymap.js"
import { Pass } from "../util/misc.js"
import { dispatchKey } from "./key_events.js"
import { commands } from "./commands.js"
const DOUBLECLICK_DELAY = 400
class PastClick {
constructor(time, pos, button) {
this.time = time
this.pos = pos
this.button = button
}
compare(time, pos, button) {
return this.time + DOUBLECLICK_DELAY > time &&
cmp(pos, this.pos) == 0 && button == this.button
}
}
let lastClick, lastDoubleClick
function clickRepeat(pos, button) {
let now = +new Date
if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
lastClick = lastDoubleClick = null
return "triple"
} else if (lastClick && lastClick.compare(now, pos, button)) {
lastDoubleClick = new PastClick(now, pos, button)
lastClick = null
return "double"
} else {
lastClick = new PastClick(now, pos, button)
lastDoubleClick = null
return "single"
}
}
// A mouse down can be a single click, double click, triple click,
// start of selection drag, start of text drag, new cursor
// (ctrl-click), rectangle drag (alt-drag), or xwin
// middle-click-paste. Or it might be a click on something we should
// not interfere with, such as a scrollbar or widget.
export function onMouseDown(e) {
let cm = this, display = cm.display
if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) return
display.input.ensurePolled()
display.shift = e.shiftKey
if (eventInWidget(display, e)) {
if (!webkit) {
// Briefly turn off draggability, to allow widgets to do
// normal dragging things.
display.scroller.draggable = false
setTimeout(() => display.scroller.draggable = true, 100)
}
return
}
if (clickInGutter(cm, e)) return
let pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single"
window.focus()
// #3261: make sure, that we're not starting a second selection
if (button == 1 && cm.state.selectingText)
cm.state.selectingText(e)
if (pos && handleMappedButton(cm, button, pos, repeat, e)) return
if (button == 1) {
if (pos) leftButtonDown(cm, pos, repeat, e)
else if (e_target(e) == display.scroller) e_preventDefault(e)
} else if (button == 2) {
if (pos) extendSelection(cm.doc, pos)
setTimeout(() => display.input.focus(), 20)
} else if (button == 3) {
if (captureRightClick) cm.display.input.onContextMenu(e)
else delayBlurEvent(cm)
}
}
function handleMappedButton(cm, button, pos, repeat, event) {
let name = "Click"
if (repeat == "double") name = "Double" + name
else if (repeat == "triple") name = "Triple" + name
name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name
return dispatchKey(cm, addModifierNames(name, event), event, bound => {
if (typeof bound == "string") bound = commands[bound]
if (!bound) return false
let done = false
try {
if (cm.isReadOnly()) cm.state.suppressEdits = true
done = bound(cm, pos) != Pass
} finally {
cm.state.suppressEdits = false
}
return done
})
}
function configureMouse(cm, repeat, event) {
let option = cm.getOption("configureMouse")
let value = option ? option(cm, repeat, event) : {}
if (value.unit == null) {
let rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey
value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line"
}
if (value.extend == null || cm.doc.extend) value.extend = cm.doc.extend || event.shiftKey
if (value.addNew == null) value.addNew = mac ? event.metaKey : event.ctrlKey
if (value.moveOnDrag == null) value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey)
return value
}
function leftButtonDown(cm, pos, repeat, event) {
if (ie) setTimeout(bind(ensureFocus, cm), 0)
else cm.curOp.focus = activeElt()
let behavior = configureMouse(cm, repeat, event)
let sel = cm.doc.sel, contained
if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
repeat == "single" && (contained = sel.contains(pos)) > -1 &&
(cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
(cmp(contained.to(), pos) > 0 || pos.xRel < 0))
leftButtonStartDrag(cm, event, pos, behavior)
else
leftButtonSelect(cm, event, pos, behavior)
}
// Start a text drag. When it ends, see if any dragging actually
// happen, and treat as a click if it didn't.
function leftButtonStartDrag(cm, event, pos, behavior) {
let display = cm.display, moved = false
let dragEnd = operation(cm, e => {
if (webkit) display.scroller.draggable = false
cm.state.draggingText = false
if (cm.state.delayingBlurEvent) {
if (cm.hasFocus()) cm.state.delayingBlurEvent = false
else delayBlurEvent(cm)
}
off(display.wrapper.ownerDocument, "mouseup", dragEnd)
off(display.wrapper.ownerDocument, "mousemove", mouseMove)
off(display.scroller, "dragstart", dragStart)
off(display.scroller, "drop", dragEnd)
if (!moved) {
e_preventDefault(e)
if (!behavior.addNew)
extendSelection(cm.doc, pos, null, null, behavior.extend)
// Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
if ((webkit && !safari) || ie && ie_version == 9)
setTimeout(() => {display.wrapper.ownerDocument.body.focus({preventScroll: true}); display.input.focus()}, 20)
else
display.input.focus()
}
})
let mouseMove = function(e2) {
moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10
}
let dragStart = () => moved = true
// Let the drag handler handle this.
if (webkit) display.scroller.draggable = true
cm.state.draggingText = dragEnd
dragEnd.copy = !behavior.moveOnDrag
on(display.wrapper.ownerDocument, "mouseup", dragEnd)
on(display.wrapper.ownerDocument, "mousemove", mouseMove)
on(display.scroller, "dragstart", dragStart)
on(display.scroller, "drop", dragEnd)
cm.state.delayingBlurEvent = true
setTimeout(() => display.input.focus(), 20)
// IE's approach to draggable
if (display.scroller.dragDrop) display.scroller.dragDrop()
}
function rangeForUnit(cm, pos, unit) {
if (unit == "char") return new Range(pos, pos)
if (unit == "word") return cm.findWordAt(pos)
if (unit == "line") return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0)))
let result = unit(cm, pos)
return new Range(result.from, result.to)
}
// Normal selection, as opposed to text dragging.
function leftButtonSelect(cm, event, start, behavior) {
if (ie) delayBlurEvent(cm)
let display = cm.display, doc = cm.doc
e_preventDefault(event)
let ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges
if (behavior.addNew && !behavior.extend) {
ourIndex = doc.sel.contains(start)
if (ourIndex > -1)
ourRange = ranges[ourIndex]
else
ourRange = new Range(start, start)
} else {
ourRange = doc.sel.primary()
ourIndex = doc.sel.primIndex
}
if (behavior.unit == "rectangle") {
if (!behavior.addNew) ourRange = new Range(start, start)
start = posFromMouse(cm, event, true, true)
ourIndex = -1
} else {
let range = rangeForUnit(cm, start, behavior.unit)
if (behavior.extend)
ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend)
else
ourRange = range
}
if (!behavior.addNew) {
ourIndex = 0
setSelection(doc, new Selection([ourRange], 0), sel_mouse)
startSel = doc.sel
} else if (ourIndex == -1) {
ourIndex = ranges.length
setSelection(doc, normalizeSelection(cm, ranges.concat([ourRange]), ourIndex),
{scroll: false, origin: "*mouse"})
} else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
setSelection(doc, normalizeSelection(cm, ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
{scroll: false, origin: "*mouse"})
startSel = doc.sel
} else {
replaceOneSelection(doc, ourIndex, ourRange, sel_mouse)
}
let lastPos = start
function extendTo(pos) {
if (cmp(lastPos, pos) == 0) return
lastPos = pos
if (behavior.unit == "rectangle") {
let ranges = [], tabSize = cm.options.tabSize
let startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize)
let posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize)
let left = Math.min(startCol, posCol), right = Math.max(startCol, posCol)
for (let line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
line <= end; line++) {
let text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize)
if (left == right)
ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos)))
else if (text.length > leftPos)
ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize))))
}
if (!ranges.length) ranges.push(new Range(start, start))
setSelection(doc, normalizeSelection(cm, startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
{origin: "*mouse", scroll: false})
cm.scrollIntoView(pos)
} else {
let oldRange = ourRange
let range = rangeForUnit(cm, pos, behavior.unit)
let anchor = oldRange.anchor, head
if (cmp(range.anchor, anchor) > 0) {
head = range.head
anchor = minPos(oldRange.from(), range.anchor)
} else {
head = range.anchor
anchor = maxPos(oldRange.to(), range.head)
}
let ranges = startSel.ranges.slice(0)
ranges[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head))
setSelection(doc, normalizeSelection(cm, ranges, ourIndex), sel_mouse)
}
}
let editorSize = display.wrapper.getBoundingClientRect()
// Used to ensure timeout re-tries don't fire when another extend
// happened in the meantime (clearTimeout isn't reliable -- at
// least on Chrome, the timeouts still happen even when cleared,
// if the clear happens after their scheduled firing time).
let counter = 0
function extend(e) {
let curCount = ++counter
let cur = posFromMouse(cm, e, true, behavior.unit == "rectangle")
if (!cur) return
if (cmp(cur, lastPos) != 0) {
cm.curOp.focus = activeElt()
extendTo(cur)
let visible = visibleLines(display, doc)
if (cur.line >= visible.to || cur.line < visible.from)
setTimeout(operation(cm, () => {if (counter == curCount) extend(e)}), 150)
} else {
let outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0
if (outside) setTimeout(operation(cm, () => {
if (counter != curCount) return
display.scroller.scrollTop += outside
extend(e)
}), 50)
}
}
function done(e) {
cm.state.selectingText = false
counter = Infinity
// If e is null or undefined we interpret this as someone trying
// to explicitly cancel the selection rather than the user
// letting go of the mouse button.
if (e) {
e_preventDefault(e)
display.input.focus()
}
off(display.wrapper.ownerDocument, "mousemove", move)
off(display.wrapper.ownerDocument, "mouseup", up)
doc.history.lastSelOrigin = null
}
let move = operation(cm, e => {
if (e.buttons === 0 || !e_button(e)) done(e)
else extend(e)
})
let up = operation(cm, done)
cm.state.selectingText = up
on(display.wrapper.ownerDocument, "mousemove", move)
on(display.wrapper.ownerDocument, "mouseup", up)
}
// Used when mouse-selecting to adjust the anchor to the proper side
// of a bidi jump depending on the visual position of the head.
function bidiSimplify(cm, range) {
let {anchor, head} = range, anchorLine = getLine(cm.doc, anchor.line)
if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) return range
let order = getOrder(anchorLine)
if (!order) return range
let index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index]
if (part.from != anchor.ch && part.to != anchor.ch) return range
let boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1)
if (boundary == 0 || boundary == order.length) return range
// Compute the relative visual position of the head compared to the
// anchor (<0 is to the left, >0 to the right)
let leftSide
if (head.line != anchor.line) {
leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0
} else {
let headIndex = getBidiPartAt(order, head.ch, head.sticky)
let dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1)
if (headIndex == boundary - 1 || headIndex == boundary)
leftSide = dir < 0
else
leftSide = dir > 0
}
let usePart = order[boundary + (leftSide ? -1 : 0)]
let from = leftSide == (usePart.level == 1)
let ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before"
return anchor.ch == ch && anchor.sticky == sticky ? range : new Range(new Pos(anchor.line, ch, sticky), head)
}
// Determines whether an event happened in the gutter, and fires the
// handlers for the corresponding event.
function gutterEvent(cm, e, type, prevent) {
let mX, mY
if (e.touches) {
mX = e.touches[0].clientX
mY = e.touches[0].clientY
} else {
try { mX = e.clientX; mY = e.clientY }
catch(e) { return false }
}
if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false
if (prevent) e_preventDefault(e)
let display = cm.display
let lineBox = display.lineDiv.getBoundingClientRect()
if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e)
mY -= lineBox.top - display.viewOffset
for (let i = 0; i < cm.display.gutterSpecs.length; ++i) {
let g = display.gutters.childNodes[i]
if (g && g.getBoundingClientRect().right >= mX) {
let line = lineAtHeight(cm.doc, mY)
let gutter = cm.display.gutterSpecs[i]
signal(cm, type, cm, line, gutter.className, e)
return e_defaultPrevented(e)
}
}
}
export function clickInGutter(cm, e) {
return gutterEvent(cm, e, "gutterClick", true)
}
// CONTEXT MENU HANDLING
// To make the context menu work, we need to briefly unhide the
// textarea (making it as unobtrusive as possible) to let the
// right-click take effect on it.
export function onContextMenu(cm, e) {
if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) return
if (signalDOMEvent(cm, e, "contextmenu")) return
if (!captureRightClick) cm.display.input.onContextMenu(e)
}
function contextMenuInGutter(cm, e) {
if (!hasHandler(cm, "gutterContextMenu")) return false
return gutterEvent(cm, e, "gutterContextMenu", false)
}