Source/WebInspectorUI/UserInterface/Views/SpreadsheetTextField.js - WebKit - Git at Google

 /*
  * Copyright (C) 2021 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 WI.SpreadsheetTextField = class SpreadsheetTextField
 {
     constructor(delegate, element, completionProvider)
     {
         this._delegate = delegate;
         this._element = element;
         this._pendingValue = null;

         this._completionProvider = completionProvider || null;
         if (this._completionProvider) {
             this._suggestionHintElement = document.createElement("span");
             this._suggestionHintElement.contentEditable = false;
             this._suggestionHintElement.classList.add("completion-hint");
             this._suggestionsView = new WI.CompletionSuggestionsView(this, {preventBlur: true});
         }

         this._element.classList.add("spreadsheet-text-field");

         this._element.addEventListener("mousedown", this._handleMouseDown.bind(this), true);
         this._element.addEventListener("click", this._handleClick.bind(this));
         this._element.addEventListener("blur", this._handleBlur.bind(this));
         this._element.addEventListener("keydown", this._handleKeyDown.bind(this));
         this._element.addEventListener("keyup", this._handleKeyUp.bind(this));
         this._element.addEventListener("input", this._handleInput.bind(this));

         this._editing = false;
         this._preventDiscardingCompletionsOnKeyUp = false;
         this._keyDownCaretPosition = -1;
         this._valueBeforeEditing = "";
         this._completionPrefix = "";
         this._completionText = "";
         this._controlSpaceKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.Control, WI.KeyboardShortcut.Key.Space);
     }

     // Public

     get element() { return this._element; }

     get editing() { return this._editing; }

     get value()
     {
         return this._pendingValue ?? this._element.textContent;
     }

     set value(value)
     {
         this._element.textContent = value;

         this._pendingValue = null;
     }

     valueWithoutSuggestion()
     {
         // The suggestion could appear anywhere within the element, and the text of the element can span multiple nodes.
         let valueWithoutSuggestion = "";
         for (let childNode of this._element.childNodes) {
             if (childNode === this._suggestionHintElement)
                 continue;
             valueWithoutSuggestion += childNode.textContent;
         }
         return valueWithoutSuggestion;
     }

     get suggestionHint()
     {
         return this._suggestionHintElement.textContent;
     }

     set suggestionHint(value)
     {
         if (this._suggestionHintElement.textContent === value)
             return;

         this._suggestionHintElement.textContent = value;

         if (value) {
             this._reAttachSuggestionHint();
             return;
         }

         this._suggestionHintElement.remove();
     }

     startEditing()
     {
         if (this._editing)
             return;

         if (this._delegate && typeof this._delegate.spreadsheetTextFieldWillStartEditing === "function")
             this._delegate.spreadsheetTextFieldWillStartEditing(this);

         this._editing = true;
         this._valueBeforeEditing = this.value;

         this._keyDownCaretPosition = -1;

         this._element.classList.add("editing");
         this._element.contentEditable = "plaintext-only";
         this._element.spellcheck = false;
         this._element.scrollIntoViewIfNeeded(false);

         this._element.focus();
         this._selectText();

         this._updateCompletions();
     }

     stopEditing()
     {
         if (!this._editing)
             return;

         this._editing = false;
         this._valueBeforeEditing = "";
         this._pendingValue = null;
         this._completionText = "";
         this._element.classList.remove("editing");
         this._element.contentEditable = false;

         this.discardCompletion();
     }

     discardCompletion()
     {
         if (!this._completionProvider)
             return;

         this._suggestionsView.hide();

         let hadCompletionText = this._completionText.length > 0;

         // Resetting the suggestion hint removes any suggestion hint element that is attached.
         this.suggestionHint = "";
         this._completionText = "";

         if (hadCompletionText) {
             this._pendingValue = this.valueWithoutSuggestion();
             this._delegate?.spreadsheetTextFieldDidChange?.(this);
         }
     }

     detached()
     {
         this.discardCompletion();
         this._element.remove();
     }

     // CompletionSuggestionsView delegate

     completionSuggestionsSelectedCompletion(suggestionsView, completionText = "")
     {
         this._completionText = completionText;

         if (this._completionText.startsWith(this._completionPrefix))
             this.suggestionHint = this._completionText.slice(this._completionPrefix.length);
         else
             this.suggestionHint = "";

         this._updatePendingValueWithCompletionText();

         if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
             this._delegate.spreadsheetTextFieldDidChange(this);
     }

     completionSuggestionsClickedCompletion(suggestionsView, completionText)
     {
         this._completionText = completionText;
         this._updatePendingValueWithCompletionText();
         this._applyPendingValue({moveCaretToEndOfCompletion: true});
         this.discardCompletion();

         if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
             this._delegate.spreadsheetTextFieldDidChange(this);
     }

     // Private

     _selectText()
     {
         window.getSelection().selectAllChildren(this._element);
     }

     _discardChange()
     {
         if (this._valueBeforeEditing !== this.value) {
             this.value = this._valueBeforeEditing;

             if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
                 this._delegate.spreadsheetTextFieldDidChange(this);
         }
     }

     _handleClick(event)
     {
         this.startEditing();
     }

     _handleMouseDown(event)
     {
         if (!this._editing)
             return;

         event.stopPropagation();
         this.discardCompletion();
     }

     _handleBlur(event)
     {
         if (!this._editing)
             return;

         // Keep editing after tabbing out of Web Inspector window and back.
         if (document.activeElement === this._element)
             return;

         this._applyPendingValue();
         this.discardCompletion();

         let changed = this._valueBeforeEditing !== this.value;
         this._delegate.spreadsheetTextFieldDidBlur(this, event, changed);
         this.stopEditing();
     }

     _handleKeyDown(event)
     {
         if (!this._editing)
             return;

         this._preventDiscardingCompletionsOnKeyUp = false;
         this._keyDownCaretPosition = this._getCaretPosition();

         if (this._suggestionsView) {
             let consumed = this._handleKeyDownForSuggestionView(event);
             this._preventDiscardingCompletionsOnKeyUp = consumed;
             if (consumed)
                 return;
         }

         let isEnterKey = event.key === "Enter";

         if (isEnterKey && event.shiftKey) {
             if (this._delegate && this._delegate.spreadsheetTextFieldAllowsNewlines(this))
                 return;
         }

         let isTabKey = event.key === "Tab";
         if (isEnterKey || isTabKey) {
             event.stop();
             this._applyPendingValue();

             let direction = (isTabKey && event.shiftKey) ? "backward" : "forward";

             if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidCommit === "function")
                 this._delegate.spreadsheetTextFieldDidCommit(this, {direction});

             this.stopEditing();
             return;
         }

         if (event.key === "ArrowUp" || event.key === "ArrowDown") {
             let delta = 1;
             if (event.metaKey)
                 delta = 100;
             else if (event.shiftKey)
                 delta = 10;
             else if (event.altKey)
                 delta = 0.1;

             if (event.key === "ArrowDown")
                 delta = -delta;

             let didModify = WI.incrementElementValue(this._element, delta);
             if (!didModify)
                 return;

             event.stop();

             if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
                 this._delegate.spreadsheetTextFieldDidChange(this);
         }

         if (event.key === "Backspace") {
             if (!this.value) {
                 event.stop();
                 this.stopEditing();

                 if (this._delegate && this._delegate.spreadsheetTextFieldDidBackspace)
                     this._delegate.spreadsheetTextFieldDidBackspace(this);

                 return;
             }
         }

         if (this._controlSpaceKeyboardShortcut.matchesEvent(event)) {
             event.stop();
             if (this._suggestionsView.visible)
                 this._suggestionsView.hide();
             else {
                 this._preventDiscardingCompletionsOnKeyUp = true;
                 const forceCompletions = true;
                 this._updateCompletions(forceCompletions);
             }
             return;
         }

         if (event.key === "Escape") {
             event.stop();
             this._discardChange();
             window.getSelection().removeAllRanges();

             if (this._delegate && this._delegate.spreadsheetTextFieldDidPressEsc)
                 this._delegate.spreadsheetTextFieldDidPressEsc(this, this._valueBeforeEditing);
         }
     }

     _handleKeyDownForSuggestionView(event)
     {
         if ((event.key === "ArrowDown" || event.key === "ArrowUp") && this._suggestionsView.visible) {
             event.stop();

             if (event.key === "ArrowDown")
                 this._suggestionsView.selectNext();
             else
                 this._suggestionsView.selectPrevious();

             // Update popover position in case text moved, e.g. started or stopped wrapping.
             this._showSuggestionsView();

             if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
                 this._delegate.spreadsheetTextFieldDidChange(this);

             return true;
         }

         if (event.key === "ArrowRight" && this._completionText.length) {
             let selection = window.getSelection();

             if (selection.isCollapsed) {
                 event.stop();
                 this._applyPendingValue({moveCaretToEndOfCompletion: true});

                 // When completing "background", don't hide the completion popover.
                 // Continue showing the popover with properties such as "background-color" and "background-image".
                 this._updateCompletions();

                 if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
                     this._delegate.spreadsheetTextFieldDidChange(this);

                 return true;
             }
         }

         if (event.key === "Escape" && this._suggestionsView.visible) {
             event.stop();
             this.discardCompletion();

             return true;
         }

         if (event.key === "ArrowLeft" && (this._completionText.length || this._suggestionsView.visible)) {
             this.discardCompletion();

             return true;
         }

         return false;
     }

     _handleKeyUp()
     {
         if (!this._editing || !this._suggestionsView)
             return;

         // Certain actions, like Ctrl+Space will handle updating or discarding completions as necessary.
         if (this._preventDiscardingCompletionsOnKeyUp)
             return;

         // Some key events, like the arrow keys and Ctrl+A (move to line start), will move the caret without committing
         // any input to the text field. In those situations we should discard completion if they are available. It is
         // also possible that we receive a KeyUp event for a key that was not pressed inside this text field, in which
         // case the _keyDownCaretPosition will still be -1. This can occur when the user types a `:` to begin editing
         // the value for a property, and the KeyUp events for each of those keys will be handled here, even though the
         // corresponding KeyDown events was never handled by this text field.
         if (this._keyDownCaretPosition === -1 || this._keyDownCaretPosition === this._getCaretPosition())
             return;

         this.discardCompletion();
     }

     _handleInput(event)
     {
         if (!this._editing)
             return;

         this._pendingValue = this.valueWithoutSuggestion().trim();
         this._preventDiscardingCompletionsOnKeyUp = true;
         this._updateCompletions();

         if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
             this._delegate.spreadsheetTextFieldDidChange(this);
     }

     _updateCompletions(forceCompletions = false)
     {
         if (!this._completionProvider)
             return;

         let useFuzzyMatching = WI.settings.experimentalCSSCompletionFuzzyMatching.value;
         let valueWithoutSuggestion = this.valueWithoutSuggestion();
         let {completions, prefix} = this._completionProvider(valueWithoutSuggestion, {allowEmptyPrefix: forceCompletions, caretPosition: this._getCaretPosition(), useFuzzyMatching});
         this._completionPrefix = prefix;

         if (!completions.length) {
             this.discardCompletion();
             return;
         }

         // No need to show the completion popover with only one item that matches the entered value.
         if (completions.length === 1 && this._suggestionsView.getCompletionText(completions[0]) === valueWithoutSuggestion) {
             this.discardCompletion();
             return;
         }

         console.assert(this._element.isConnected, "SpreadsheetTextField already removed from the DOM.");
         if (!this._element.isConnected) {
             this._suggestionsView.hide();
             return;
         }

         this._suggestionsView.update(completions);

         if (completions.length === 1 && this._suggestionsView.getCompletionText(completions[0]).startsWith(this._completionPrefix)) {
             // No need to show the completion popover with only one item that begins with the completion prefix.
             // When using fuzzy matching, the completion prefix may not occur at the beginning of the suggestion.
             this._suggestionsView.hide();
         } else
             this._showSuggestionsView();

         this._suggestionsView.selectedIndex = NaN;
         if (this._completionPrefix) {
             // Select first item and call completionSuggestionsSelectedCompletion.
             this._suggestionsView.selectNext();
         } else
             this.suggestionHint = "";
     }

     _showSuggestionsView()
     {
         // Adjust the used caret position to correctly align autocompletion results with existing text. The suggestions
         // should appear aligned as below:
         //
         // border: 1px solid ro|
         //                   rosybrown
         //                   royalblue
         //
         // FIXME: Account for the caret being within the token when fixing <webkit.org/b/227157> Styles: Support completions mid-token.
         let adjustedCaretPosition = this._getCaretPosition() - this._completionPrefix.length;
         let caretRect = this._getCaretRect(adjustedCaretPosition);

         // Hide completion popover when the anchor element is removed from the DOM.
         if (!caretRect)
             this._suggestionsView.hide();
         else {
             this._suggestionsView.show(caretRect);
             this._suggestionsView.hideWhenElementMoves(this._element);
         }
     }

     _getCaretPosition()
     {
         let selection = window.getSelection();
         if (!selection.rangeCount)
             return 0;

         // The window's selection range will only contain the current line's positioning in multiline text, so a new
         // range must be created between the end of the current range and the beginning of the first line of text in
         // order to get an accurate character position for the caret.
         let lineRange = selection.getRangeAt(0);
         let multilineRange = document.createRange();
         multilineRange.setStart(this._element, 0);
         multilineRange.setEnd(lineRange.endContainer, lineRange.endOffset);
         return multilineRange.toString().length;
     }

     _getCaretRect(caretPosition)
     {
         let isHidden = (clientRect) => {
             return clientRect.x === 0 && clientRect.y === 0;
         };

         let caretRange = this._rangeAtCaretPosition(caretPosition);
         let caretClientRect = caretRange.getBoundingClientRect();
         if (!isHidden(caretClientRect))
             return WI.Rect.rectFromClientRect(caretClientRect);

         let elementClientRect = this._element.getBoundingClientRect();
         if (isHidden(elementClientRect))
             return null;

         const leftPadding = parseInt(getComputedStyle(this._element).paddingLeft) || 0;
         return new WI.Rect(elementClientRect.left + leftPadding, elementClientRect.top, elementClientRect.width, elementClientRect.height);
     }

     _rangeAtCaretPosition(caretPosition) {
         for (let node of this._element.childNodes) {
             let textContent = node.textContent;
             if (caretPosition <= textContent.length) {
                 let range = document.createRange();
                 range.setStart(node, caretPosition);
                 range.setEnd(node, caretPosition);
                 return range;
             }

             caretPosition -= textContent.length;
         }

         // If there are no nodes, or the caret position is greater than the total text content, provide the range of a
         // caret at the end of the element.
         let range = document.createRange();
         range.selectNodeContents(this._element);
         range.collapse();
         return range;
     }

     _applyPendingValue({moveCaretToEndOfCompletion} = {})
     {
         if (!this._pendingValue)
             return;

         let caretPosition = this._getCaretPosition();
         let newCaretPosition = moveCaretToEndOfCompletion ? caretPosition - this._completionPrefix.length + this._completionText.length : caretPosition;

         // Setting the value collapses the text selection. Get the caret position before doing this.
         this.value = this._pendingValue;

         if (this._element.textContent.length) {
             let textChildNode = this._element.firstChild;
             window.getSelection().setBaseAndExtent(textChildNode, newCaretPosition, textChildNode, newCaretPosition);
         }
     }

     _updatePendingValueWithCompletionText()
     {
         let caretPosition = this._getCaretPosition();
         let value = this.valueWithoutSuggestion();

         this._pendingValue = value.slice(0, caretPosition - this._completionPrefix.length) + this._completionText + value.slice(caretPosition + 1, value.length);
     }

     _reAttachSuggestionHint()
     {
         console.assert(this.suggestionHint.length, "Suggestion hint should not be empty when attaching the suggestion hint element.");

         if (this._suggestionHintElement.parentElement === this._element)
             return;

         let selection = window.getSelection();
         if (!this._element.textContent.length || !selection.rangeCount) {
             this._element.append(this._suggestionHintElement);
             return;
         }

         let range = selection.getRangeAt(0);

         console.assert(range.endContainer instanceof Text, range.endContainer);
         if (!(range.endContainer instanceof Text))
             return;

         this._element.insertBefore(this._suggestionHintElement, range.endContainer.splitText(range.endOffset));
     }
 };
	/*
	* Copyright (C) 2021 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	WI.SpreadsheetTextField = class SpreadsheetTextField
	{
	constructor(delegate, element, completionProvider)
	{
	this._delegate = delegate;
	this._element = element;
	this._pendingValue = null;

	this._completionProvider = completionProvider \|\| null;
	if (this._completionProvider) {
	this._suggestionHintElement = document.createElement("span");
	this._suggestionHintElement.contentEditable = false;
	this._suggestionHintElement.classList.add("completion-hint");
	this._suggestionsView = new WI.CompletionSuggestionsView(this, {preventBlur: true});
	}

	this._element.classList.add("spreadsheet-text-field");

	this._element.addEventListener("mousedown", this._handleMouseDown.bind(this), true);
	this._element.addEventListener("click", this._handleClick.bind(this));
	this._element.addEventListener("blur", this._handleBlur.bind(this));
	this._element.addEventListener("keydown", this._handleKeyDown.bind(this));
	this._element.addEventListener("keyup", this._handleKeyUp.bind(this));
	this._element.addEventListener("input", this._handleInput.bind(this));

	this._editing = false;
	this._preventDiscardingCompletionsOnKeyUp = false;
	this._keyDownCaretPosition = -1;
	this._valueBeforeEditing = "";
	this._completionPrefix = "";
	this._completionText = "";
	this._controlSpaceKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.Control, WI.KeyboardShortcut.Key.Space);
	}

	// Public

	get element() { return this._element; }

	get editing() { return this._editing; }

	get value()
	{
	return this._pendingValue ?? this._element.textContent;
	}

	set value(value)
	{
	this._element.textContent = value;

	this._pendingValue = null;
	}

	valueWithoutSuggestion()
	{
	// The suggestion could appear anywhere within the element, and the text of the element can span multiple nodes.
	let valueWithoutSuggestion = "";
	for (let childNode of this._element.childNodes) {
	if (childNode === this._suggestionHintElement)
	continue;
	valueWithoutSuggestion += childNode.textContent;
	}
	return valueWithoutSuggestion;
	}

	get suggestionHint()
	{
	return this._suggestionHintElement.textContent;
	}

	set suggestionHint(value)
	{
	if (this._suggestionHintElement.textContent === value)
	return;

	this._suggestionHintElement.textContent = value;

	if (value) {
	this._reAttachSuggestionHint();
	return;
	}

	this._suggestionHintElement.remove();
	}

	startEditing()
	{
	if (this._editing)
	return;

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldWillStartEditing === "function")
	this._delegate.spreadsheetTextFieldWillStartEditing(this);

	this._editing = true;
	this._valueBeforeEditing = this.value;

	this._keyDownCaretPosition = -1;

	this._element.classList.add("editing");
	this._element.contentEditable = "plaintext-only";
	this._element.spellcheck = false;
	this._element.scrollIntoViewIfNeeded(false);

	this._element.focus();
	this._selectText();

	this._updateCompletions();
	}

	stopEditing()
	{
	if (!this._editing)
	return;

	this._editing = false;
	this._valueBeforeEditing = "";
	this._pendingValue = null;
	this._completionText = "";
	this._element.classList.remove("editing");
	this._element.contentEditable = false;

	this.discardCompletion();
	}

	discardCompletion()
	{
	if (!this._completionProvider)
	return;

	this._suggestionsView.hide();

	let hadCompletionText = this._completionText.length > 0;

	// Resetting the suggestion hint removes any suggestion hint element that is attached.
	this.suggestionHint = "";
	this._completionText = "";

	if (hadCompletionText) {
	this._pendingValue = this.valueWithoutSuggestion();
	this._delegate?.spreadsheetTextFieldDidChange?.(this);
	}
	}

	detached()
	{
	this.discardCompletion();
	this._element.remove();
	}

	// CompletionSuggestionsView delegate

	completionSuggestionsSelectedCompletion(suggestionsView, completionText = "")
	{
	this._completionText = completionText;

	if (this._completionText.startsWith(this._completionPrefix))
	this.suggestionHint = this._completionText.slice(this._completionPrefix.length);
	else
	this.suggestionHint = "";

	this._updatePendingValueWithCompletionText();

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);
	}

	completionSuggestionsClickedCompletion(suggestionsView, completionText)
	{
	this._completionText = completionText;
	this._updatePendingValueWithCompletionText();
	this._applyPendingValue({moveCaretToEndOfCompletion: true});
	this.discardCompletion();

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);
	}

	// Private

	_selectText()
	{
	window.getSelection().selectAllChildren(this._element);
	}

	_discardChange()
	{
	if (this._valueBeforeEditing !== this.value) {
	this.value = this._valueBeforeEditing;

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);
	}
	}

	_handleClick(event)
	{
	this.startEditing();
	}

	_handleMouseDown(event)
	{
	if (!this._editing)
	return;

	event.stopPropagation();
	this.discardCompletion();
	}

	_handleBlur(event)
	{
	if (!this._editing)
	return;

	// Keep editing after tabbing out of Web Inspector window and back.
	if (document.activeElement === this._element)
	return;

	this._applyPendingValue();
	this.discardCompletion();

	let changed = this._valueBeforeEditing !== this.value;
	this._delegate.spreadsheetTextFieldDidBlur(this, event, changed);
	this.stopEditing();
	}

	_handleKeyDown(event)
	{
	if (!this._editing)
	return;

	this._preventDiscardingCompletionsOnKeyUp = false;
	this._keyDownCaretPosition = this._getCaretPosition();

	if (this._suggestionsView) {
	let consumed = this._handleKeyDownForSuggestionView(event);
	this._preventDiscardingCompletionsOnKeyUp = consumed;
	if (consumed)
	return;
	}

	let isEnterKey = event.key === "Enter";

	if (isEnterKey && event.shiftKey) {
	if (this._delegate && this._delegate.spreadsheetTextFieldAllowsNewlines(this))
	return;
	}

	let isTabKey = event.key === "Tab";
	if (isEnterKey \|\| isTabKey) {
	event.stop();
	this._applyPendingValue();

	let direction = (isTabKey && event.shiftKey) ? "backward" : "forward";

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidCommit === "function")
	this._delegate.spreadsheetTextFieldDidCommit(this, {direction});

	this.stopEditing();
	return;
	}

	if (event.key === "ArrowUp" \|\| event.key === "ArrowDown") {
	let delta = 1;
	if (event.metaKey)
	delta = 100;
	else if (event.shiftKey)
	delta = 10;
	else if (event.altKey)
	delta = 0.1;

	if (event.key === "ArrowDown")
	delta = -delta;

	let didModify = WI.incrementElementValue(this._element, delta);
	if (!didModify)
	return;

	event.stop();

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);
	}

	if (event.key === "Backspace") {
	if (!this.value) {
	event.stop();
	this.stopEditing();

	if (this._delegate && this._delegate.spreadsheetTextFieldDidBackspace)
	this._delegate.spreadsheetTextFieldDidBackspace(this);

	return;
	}
	}

	if (this._controlSpaceKeyboardShortcut.matchesEvent(event)) {
	event.stop();
	if (this._suggestionsView.visible)
	this._suggestionsView.hide();
	else {
	this._preventDiscardingCompletionsOnKeyUp = true;
	const forceCompletions = true;
	this._updateCompletions(forceCompletions);
	}
	return;
	}

	if (event.key === "Escape") {
	event.stop();
	this._discardChange();
	window.getSelection().removeAllRanges();

	if (this._delegate && this._delegate.spreadsheetTextFieldDidPressEsc)
	this._delegate.spreadsheetTextFieldDidPressEsc(this, this._valueBeforeEditing);
	}
	}

	_handleKeyDownForSuggestionView(event)
	{
	if ((event.key === "ArrowDown" \|\| event.key === "ArrowUp") && this._suggestionsView.visible) {
	event.stop();

	if (event.key === "ArrowDown")
	this._suggestionsView.selectNext();
	else
	this._suggestionsView.selectPrevious();

	// Update popover position in case text moved, e.g. started or stopped wrapping.
	this._showSuggestionsView();

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);

	return true;
	}

	if (event.key === "ArrowRight" && this._completionText.length) {
	let selection = window.getSelection();

	if (selection.isCollapsed) {
	event.stop();
	this._applyPendingValue({moveCaretToEndOfCompletion: true});

	// When completing "background", don't hide the completion popover.
	// Continue showing the popover with properties such as "background-color" and "background-image".
	this._updateCompletions();

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);

	return true;
	}
	}

	if (event.key === "Escape" && this._suggestionsView.visible) {
	event.stop();
	this.discardCompletion();

	return true;
	}

	if (event.key === "ArrowLeft" && (this._completionText.length \|\| this._suggestionsView.visible)) {
	this.discardCompletion();

	return true;
	}

	return false;
	}

	_handleKeyUp()
	{
	if (!this._editing \|\| !this._suggestionsView)
	return;

	// Certain actions, like Ctrl+Space will handle updating or discarding completions as necessary.
	if (this._preventDiscardingCompletionsOnKeyUp)
	return;

	// Some key events, like the arrow keys and Ctrl+A (move to line start), will move the caret without committing
	// any input to the text field. In those situations we should discard completion if they are available. It is
	// also possible that we receive a KeyUp event for a key that was not pressed inside this text field, in which
	// case the _keyDownCaretPosition will still be -1. This can occur when the user types a `:` to begin editing
	// the value for a property, and the KeyUp events for each of those keys will be handled here, even though the
	// corresponding KeyDown events was never handled by this text field.
	if (this._keyDownCaretPosition === -1 \|\| this._keyDownCaretPosition === this._getCaretPosition())
	return;

	this.discardCompletion();
	}

	_handleInput(event)
	{
	if (!this._editing)
	return;

	this._pendingValue = this.valueWithoutSuggestion().trim();
	this._preventDiscardingCompletionsOnKeyUp = true;
	this._updateCompletions();

	if (this._delegate && typeof this._delegate.spreadsheetTextFieldDidChange === "function")
	this._delegate.spreadsheetTextFieldDidChange(this);
	}

	_updateCompletions(forceCompletions = false)
	{
	if (!this._completionProvider)
	return;

	let useFuzzyMatching = WI.settings.experimentalCSSCompletionFuzzyMatching.value;
	let valueWithoutSuggestion = this.valueWithoutSuggestion();
	let {completions, prefix} = this._completionProvider(valueWithoutSuggestion, {allowEmptyPrefix: forceCompletions, caretPosition: this._getCaretPosition(), useFuzzyMatching});
	this._completionPrefix = prefix;

	if (!completions.length) {
	this.discardCompletion();
	return;
	}

	// No need to show the completion popover with only one item that matches the entered value.
	if (completions.length === 1 && this._suggestionsView.getCompletionText(completions[0]) === valueWithoutSuggestion) {
	this.discardCompletion();
	return;
	}

	console.assert(this._element.isConnected, "SpreadsheetTextField already removed from the DOM.");
	if (!this._element.isConnected) {
	this._suggestionsView.hide();
	return;
	}

	this._suggestionsView.update(completions);

	if (completions.length === 1 && this._suggestionsView.getCompletionText(completions[0]).startsWith(this._completionPrefix)) {
	// No need to show the completion popover with only one item that begins with the completion prefix.
	// When using fuzzy matching, the completion prefix may not occur at the beginning of the suggestion.
	this._suggestionsView.hide();
	} else
	this._showSuggestionsView();

	this._suggestionsView.selectedIndex = NaN;
	if (this._completionPrefix) {
	// Select first item and call completionSuggestionsSelectedCompletion.
	this._suggestionsView.selectNext();
	} else
	this.suggestionHint = "";
	}

	_showSuggestionsView()
	{
	// Adjust the used caret position to correctly align autocompletion results with existing text. The suggestions
	// should appear aligned as below:
	//
	// border: 1px solid ro\|
	// rosybrown
	// royalblue
	//
	// FIXME: Account for the caret being within the token when fixing <webkit.org/b/227157> Styles: Support completions mid-token.
	let adjustedCaretPosition = this._getCaretPosition() - this._completionPrefix.length;
	let caretRect = this._getCaretRect(adjustedCaretPosition);

	// Hide completion popover when the anchor element is removed from the DOM.
	if (!caretRect)
	this._suggestionsView.hide();
	else {
	this._suggestionsView.show(caretRect);
	this._suggestionsView.hideWhenElementMoves(this._element);
	}
	}

	_getCaretPosition()
	{
	let selection = window.getSelection();
	if (!selection.rangeCount)
	return 0;

	// The window's selection range will only contain the current line's positioning in multiline text, so a new
	// range must be created between the end of the current range and the beginning of the first line of text in
	// order to get an accurate character position for the caret.
	let lineRange = selection.getRangeAt(0);
	let multilineRange = document.createRange();
	multilineRange.setStart(this._element, 0);
	multilineRange.setEnd(lineRange.endContainer, lineRange.endOffset);
	return multilineRange.toString().length;
	}

	_getCaretRect(caretPosition)
	{
	let isHidden = (clientRect) => {
	return clientRect.x === 0 && clientRect.y === 0;
	};

	let caretRange = this._rangeAtCaretPosition(caretPosition);
	let caretClientRect = caretRange.getBoundingClientRect();
	if (!isHidden(caretClientRect))
	return WI.Rect.rectFromClientRect(caretClientRect);

	let elementClientRect = this._element.getBoundingClientRect();
	if (isHidden(elementClientRect))
	return null;

	const leftPadding = parseInt(getComputedStyle(this._element).paddingLeft) \|\| 0;
	return new WI.Rect(elementClientRect.left + leftPadding, elementClientRect.top, elementClientRect.width, elementClientRect.height);
	}

	_rangeAtCaretPosition(caretPosition) {
	for (let node of this._element.childNodes) {
	let textContent = node.textContent;
	if (caretPosition <= textContent.length) {
	let range = document.createRange();
	range.setStart(node, caretPosition);
	range.setEnd(node, caretPosition);
	return range;
	}

	caretPosition -= textContent.length;
	}

	// If there are no nodes, or the caret position is greater than the total text content, provide the range of a
	// caret at the end of the element.
	let range = document.createRange();
	range.selectNodeContents(this._element);
	range.collapse();
	return range;
	}

	_applyPendingValue({moveCaretToEndOfCompletion} = {})
	{
	if (!this._pendingValue)
	return;

	let caretPosition = this._getCaretPosition();
	let newCaretPosition = moveCaretToEndOfCompletion ? caretPosition - this._completionPrefix.length + this._completionText.length : caretPosition;

	// Setting the value collapses the text selection. Get the caret position before doing this.
	this.value = this._pendingValue;

	if (this._element.textContent.length) {
	let textChildNode = this._element.firstChild;
	window.getSelection().setBaseAndExtent(textChildNode, newCaretPosition, textChildNode, newCaretPosition);
	}
	}

	_updatePendingValueWithCompletionText()
	{
	let caretPosition = this._getCaretPosition();
	let value = this.valueWithoutSuggestion();

	this._pendingValue = value.slice(0, caretPosition - this._completionPrefix.length) + this._completionText + value.slice(caretPosition + 1, value.length);
	}

	_reAttachSuggestionHint()
	{
	console.assert(this.suggestionHint.length, "Suggestion hint should not be empty when attaching the suggestion hint element.");

	if (this._suggestionHintElement.parentElement === this._element)
	return;

	let selection = window.getSelection();
	if (!this._element.textContent.length \|\| !selection.rangeCount) {
	this._element.append(this._suggestionHintElement);
	return;
	}

	let range = selection.getRangeAt(0);

	console.assert(range.endContainer instanceof Text, range.endContainer);
	if (!(range.endContainer instanceof Text))
	return;

	this._element.insertBefore(this._suggestionHintElement, range.endContainer.splitText(range.endOffset));
	}
	};