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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 41x 41x 41x 41x 41x 14x 14x 27x 21x 11x 11x 11x 2x 41x 11x 11x 11x 11x 11x 11x 27x 3x 24x 4x 20x 15x 15x 15x 15x 15x 5x 5x 5x 5x 5x 3x 2x 2x 1x 1x 1x 1x 4x 41x 85x 17x 17x 17x 17x 17x 17x 4x 13x 5x 8x 5x 27x | import { deleteAllSegmentBefore } from './deleteSteps/deleteAllSegmentBefore';
import { deleteEmptyQuote } from './deleteSteps/deleteEmptyQuote';
import { deleteList } from './deleteSteps/deleteList';
import { deleteParagraphStyle } from './deleteSteps/deleteParagraphStyle';
import { editTable } from 'roosterjs-content-model-api';
import { getDeleteCollapsedSelection } from './deleteSteps/deleteCollapsedSelection';
import {
ChangeSource,
deleteSelection,
isElementOfType,
isLinkUndeletable,
isModifierKey,
isNodeOfType,
parseTableCells,
} from 'roosterjs-content-model-dom';
import {
handleKeyboardEventResult,
shouldDeleteAllSegmentsBefore,
shouldDeleteWord,
} from './handleKeyboardEventCommon';
import {
backwardDeleteWordSelection,
forwardDeleteWordSelection,
} from './deleteSteps/deleteWordSelection';
import type {
DOMSelection,
DeleteSelectionStep,
IEditor,
TableDeleteOperation,
} from 'roosterjs-content-model-types';
import type { EditOptions } from './EditOptions';
/**
* @internal
* Do keyboard event handling for DELETE/BACKSPACE key
* @param editor The editor object
* @param rawEvent DOM keyboard event
* @param handleExpandedSelection Whether to handle expanded selection within a text node by CM
* @returns True if the event is handled by content model, otherwise false
*/
export function keyboardDelete(editor: IEditor, rawEvent: KeyboardEvent, options: EditOptions) {
let handled = false;
const selection = editor.getDOMSelection();
const { handleExpandedSelectionOnDelete } = options;
const tableDeleteType = shouldDeleteTableWithContentModel(selection, rawEvent);
if (tableDeleteType) {
editTable(editor, tableDeleteType);
handled = true;
} else if (
shouldDeleteWithContentModel(selection, rawEvent, !!handleExpandedSelectionOnDelete)
) {
editor.formatContentModel(
(model, context) => {
const result = deleteSelection(
model,
getDeleteSteps(rawEvent, !!editor.getEnvironment().isMac, options),
context
).deleteResult;
handled = handleKeyboardEventResult(editor, model, rawEvent, result, context);
return handled;
},
{
rawEvent,
changeSource: ChangeSource.Keyboard,
getChangeData: () => rawEvent.which,
scrollCaretIntoView: true,
apiName: rawEvent.key == 'Delete' ? 'handleDeleteKey' : 'handleBackspaceKey',
}
);
}
return handled;
}
function getDeleteSteps(
rawEvent: KeyboardEvent,
isMac: boolean,
options: EditOptions
): (DeleteSelectionStep | null)[] {
const isForward = rawEvent.key == 'Delete';
const deleteAllSegmentBeforeStep =
shouldDeleteAllSegmentsBefore(rawEvent) && !isForward ? deleteAllSegmentBefore : null;
const deleteWordSelection = shouldDeleteWord(rawEvent, isMac)
? isForward
? forwardDeleteWordSelection
: backwardDeleteWordSelection
: null;
const deleteCollapsedSelection = getDeleteCollapsedSelection(
isForward ? 'forward' : 'backward',
options
);
const deleteQuote = !isForward ? deleteEmptyQuote : null;
return [
deleteAllSegmentBeforeStep,
deleteWordSelection,
isForward ? null : deleteList,
deleteCollapsedSelection,
deleteQuote,
deleteParagraphStyle,
];
}
function shouldDeleteWithContentModel(
selection: DOMSelection | null,
rawEvent: KeyboardEvent,
handleExpandedSelection: boolean
) {
if (!selection || (rawEvent.key == 'Delete' && rawEvent.shiftKey)) {
return false; // Nothing to delete or leave it to browser when delete and shift key is pressed so that browser will trigger cut event
} else if (selection.type != 'range') {
return true;
} else if (!selection.range.collapsed) {
Iif (handleExpandedSelection) {
return true; // Selection is not collapsed, need to delete all selections
}
const range = selection.range;
const { startContainer, endContainer } = selection.range;
const isInSameTextNode =
startContainer === endContainer && isNodeOfType(startContainer, 'TEXT_NODE');
return !(
isInSameTextNode &&
!isModifierKey(rawEvent) &&
range.endOffset - range.startOffset < (startContainer.nodeValue?.length ?? 0)
);
} else {
const range = selection.range;
const startContainer = range.startContainer;
const startOffset = range.startOffset;
// When selection is collapsed and is in middle of text node, no need to use Content Model to delete
return !(
isNodeOfType(startContainer, 'TEXT_NODE') &&
!isModifierKey(rawEvent) &&
(canDeleteBefore(rawEvent, startContainer, startOffset) ||
canDeleteAfter(rawEvent, startContainer, startOffset))
);
}
}
function canDeleteBefore(rawEvent: KeyboardEvent, text: Text, offset: number) {
if (rawEvent.key != 'Backspace' || offset <= 1) {
return false;
}
const length = text.nodeValue?.length ?? 0;
if (offset == length) {
// At the end of text, need to check if next segment is deletable
const nextSibling = text.nextSibling;
const isNextSiblingUndeletable =
isNodeOfType(nextSibling, 'ELEMENT_NODE') &&
isElementOfType(nextSibling, 'a') &&
isLinkUndeletable(nextSibling) &&
!nextSibling.firstChild;
// If next sibling is undeletable, we cannot let browser handle it since it will remove the anchor
// So we return false here to let Content Model handle it
return !isNextSiblingUndeletable;
} else {
// In middle of text, we can safely let browser handle deletion
return true;
}
}
function canDeleteAfter(rawEvent: KeyboardEvent, text: Text, offset: number) {
return rawEvent.key == 'Delete' && offset < (text.nodeValue?.length ?? 0) - 1;
}
function shouldDeleteTableWithContentModel(
selection: DOMSelection | null,
rawEvent: KeyboardEvent
): TableDeleteOperation | undefined {
if (
selection?.type == 'table' &&
(rawEvent.key == 'Backspace' || (rawEvent.key == 'Delete' && rawEvent.shiftKey))
) {
const { lastRow, lastColumn, table, firstColumn, firstRow } = selection;
const parsedTable = parseTableCells(table);
const rowNumber = parsedTable.length;
const isWholeColumnSelected = firstRow == 0 && lastRow == rowNumber - 1;
const columnNumber = parsedTable[lastRow].length;
const isWholeRowSelected = firstColumn == 0 && lastColumn == columnNumber - 1;
if (isWholeRowSelected && isWholeColumnSelected) {
return 'deleteTable';
}
if (isWholeRowSelected) {
return 'deleteRow';
}
if (isWholeColumnSelected) {
return 'deleteColumn';
}
}
return undefined;
}
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