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* VisualEditor ContentEditable linear arrow key down handler
*
* @copyright See AUTHORS.txt
*/
/* istanbul ignore next */
/**
* Arrow key down handler for linear selections.
*
* @class
* @extends ve.ce.KeyDownHandler
*
* @constructor
*/
ve.ce.LinearArrowKeyDownHandler = function VeCeLinearArrowKeyDownHandler() {
// Parent constructor - never called because class is fully static
// ve.ui.LinearArrowKeyDownHandler.super.apply( this, arguments );
};
/* Inheritance */
OO.inheritClass( ve.ce.LinearArrowKeyDownHandler, ve.ce.KeyDownHandler );
/* Static properties */
ve.ce.LinearArrowKeyDownHandler.static.name = 'linearArrow';
ve.ce.LinearArrowKeyDownHandler.static.keys = [
OO.ui.Keys.UP, OO.ui.Keys.DOWN, OO.ui.Keys.LEFT, OO.ui.Keys.RIGHT,
OO.ui.Keys.HOME, OO.ui.Keys.END, OO.ui.Keys.PAGEUP, OO.ui.Keys.PAGEDOWN
];
ve.ce.LinearArrowKeyDownHandler.static.supportedSelections = [ 'linear' ];
/* Static methods */
/**
* @inheritdoc
*/
ve.ce.LinearArrowKeyDownHandler.static.execute = function ( surface, e ) {
const isBlockMove = e.keyCode === OO.ui.Keys.UP || e.keyCode === OO.ui.Keys.DOWN ||
e.keyCode === OO.ui.Keys.PAGEUP || e.keyCode === OO.ui.Keys.PAGEDOWN ||
e.keyCode === OO.ui.Keys.HOME || e.keyCode === OO.ui.Keys.END,
keyBlockDirection = e.keyCode === OO.ui.Keys.DOWN || e.keyCode === OO.ui.Keys.PAGEDOWN || e.keyCode === OO.ui.Keys.END ? 1 : -1,
activeNode = surface.getActiveNode();
let range = surface.model.getSelection().getRange();
// TODO: onDocumentKeyDown did this already
surface.surfaceObserver.stopTimerLoop();
// TODO: onDocumentKeyDown did this already
surface.surfaceObserver.pollOnce();
function moveOffFocusableNode( focusableRange, dir ) {
return surface.model.getDocument().getRelativeRange(
focusableRange,
dir,
'character',
e.shiftKey,
activeNode && ( e.shiftKey || activeNode.trapsCursor() ) ? activeNode.getRange() : null
);
}
let direction, directionality;
if ( surface.focusedBlockSlug ) {
// Block level selection, so directionality is just css directionality
if ( isBlockMove ) {
direction = keyBlockDirection;
} else {
directionality = $( surface.focusedBlockSlug ).css( 'direction' );
// eslint-disable-next-line no-bitwise
if ( e.keyCode === OO.ui.Keys.LEFT ^ directionality === 'rtl' ) {
// Left arrow in ltr, or right arrow in rtl
direction = -1;
} else {
// Left arrow in rtl, or right arrow in ltr
direction = 1;
}
}
range = moveOffFocusableNode( range, direction );
surface.model.setLinearSelection( range );
e.preventDefault();
return true;
}
if ( surface.focusedNode ) {
if ( isBlockMove ) {
direction = keyBlockDirection;
} else {
directionality = surface.getFocusedNodeDirectionality();
// eslint-disable-next-line no-bitwise
if ( e.keyCode === OO.ui.Keys.LEFT ^ directionality === 'rtl' ) {
// Left arrow in ltr, or right arrow in rtl
direction = -1;
} else {
// Left arrow in rtl, or right arrow in ltr
direction = 1;
}
}
if ( e.shiftKey ) {
// There is no DOM range to expand (because the selection is faked), so
// use "collapse to focus - observe - expand". Define "focus" to be the
// edge of the focusedNode in the direction of motion (so the selection
// always grows). This means that clicking on the focusableNode then
// modifying the selection will always include the node.
// eslint-disable-next-line no-bitwise
if ( direction === -1 ^ range.isBackwards() ) {
range = range.flip();
}
let observationRange = new ve.Range( range.to );
if ( !surface.focusedNode.isContent() ) {
// Block focusable node: move the observation range to an adjacent content offset
observationRange = moveOffFocusableNode( observationRange, direction );
observationRange = new ve.Range( observationRange.to );
}
surface.model.setLinearSelection( observationRange );
} else {
range = moveOffFocusableNode( range, direction );
// Move to start/end of node in the model in DM (and DOM)
range = new ve.Range( direction === 1 ? range.end : range.start );
surface.model.setLinearSelection( range );
if ( !isBlockMove ) {
// Un-shifted left/right: we've already moved so preventDefault
e.preventDefault();
return true;
}
// Else keep going with the cursor in the new place
}
}
// Else keep DM range and DOM selection as-is
let collapseNode, collapseOffset;
if ( e.shiftKey && !ve.supportsSelectionExtend && range.isBackwards() ) {
// If the browser doesn't support backwards selections, but the dm range
// is backwards, then use "collapse to anchor - observe - expand".
collapseNode = surface.nativeSelection.anchorNode;
collapseOffset = surface.nativeSelection.anchorOffset;
} else if ( e.shiftKey && !range.isCollapsed() && isBlockMove ) {
// If selection is expanded and cursoring is up/down, use
// "collapse to focus - observe - expand" to work round quirks.
collapseNode = surface.nativeSelection.focusNode;
collapseOffset = surface.nativeSelection.focusOffset;
}
// Else don't collapse the selection
if ( collapseNode ) {
const nativeRange = surface.getElementDocument().createRange();
nativeRange.setStart( collapseNode, collapseOffset );
nativeRange.setEnd( collapseNode, collapseOffset );
surface.nativeSelection.removeAllRanges();
surface.nativeSelection.addRange( nativeRange );
}
const startFocusNode = surface.nativeSelection.focusNode;
const startFocusOffset = surface.nativeSelection.focusOffset;
// Re-expand (or fixup) the selection after the native action, if necessary
surface.eventSequencer.afterOne( { keydown: function () {
// Support: Chrome
// Chrome bug lets you cursor into a multi-line contentEditable=false with up/down…
const viewNode = $( surface.nativeSelection.focusNode ).closest( '.ve-ce-leafNode,.ve-ce-branchNode' ).data( 'view' );
if ( !viewNode ) {
// Irrelevant selection (or none)
return;
}
let newRange;
Iif ( viewNode.isFocusable() ) {
let afterDirection;
// We've landed in a focusable node; fixup the range
if ( isBlockMove ) {
// The intended direction is clear, even if the cursor did not move
// or did something completely preposterous
afterDirection = keyBlockDirection;
} else {
// Observe which way the cursor moved
afterDirection = ve.compareDocumentOrder(
surface.nativeSelection.focusNode,
surface.nativeSelection.focusOffset,
startFocusNode,
startFocusOffset
);
}
newRange = (
afterDirection > 0 ?
viewNode.getOuterRange() :
viewNode.getOuterRange().flip()
);
} else {
// Check where the range has moved to
surface.surfaceObserver.pollOnceNoCallback();
newRange = new ve.Range( surface.surfaceObserver.getRange().to );
}
// Adjust range to use old anchor, if necessary
if ( e.shiftKey ) {
newRange = new ve.Range( range.from, newRange.to );
surface.getModel().setLinearSelection( newRange );
}
surface.updateActiveAnnotations();
surface.surfaceObserver.pollOnce();
} } );
return true;
};
/* Registration */
ve.ce.keyDownHandlerFactory.register( ve.ce.LinearArrowKeyDownHandler );
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