mirror of
https://github.com/google/blockly.git
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136 lines
3.7 KiB
JavaScript
136 lines
3.7 KiB
JavaScript
/**
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* @license
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* Copyright 2019 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @fileoverview Object representing a bottom row on a rendered block.
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* of its subcomponents.
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*/
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/**
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* Object representing a bottom row on a rendered block.
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* of its subcomponents.
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* @class
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*/
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goog.module('Blockly.blockRendering.BottomRow');
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const object = goog.require('Blockly.utils.object');
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/* eslint-disable-next-line no-unused-vars */
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const {BlockSvg} = goog.requireType('Blockly.BlockSvg');
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/* eslint-disable-next-line no-unused-vars */
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const {ConstantProvider} = goog.requireType('Blockly.blockRendering.ConstantProvider');
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/* eslint-disable-next-line no-unused-vars */
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const {NextConnection} = goog.requireType('Blockly.blockRendering.NextConnection');
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const {Row} = goog.require('Blockly.blockRendering.Row');
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const {Types} = goog.require('Blockly.blockRendering.Types');
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/**
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* An object containing information about what elements are in the bottom row of
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* a block as well as spacing information for the bottom row.
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* Elements in a bottom row can consist of corners, spacers and next
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* connections.
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* @param {!ConstantProvider} constants The rendering
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* constants provider.
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* @package
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* @constructor
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* @extends {Row}
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* @alias Blockly.blockRendering.BottomRow
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*/
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const BottomRow = function(constants) {
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BottomRow.superClass_.constructor.call(this, constants);
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this.type |= Types.BOTTOM_ROW;
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/**
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* Whether this row has a next connection.
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* @package
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* @type {boolean}
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*/
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this.hasNextConnection = false;
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/**
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* The next connection on the row, if any.
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* @package
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* @type {NextConnection}
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*/
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this.connection = null;
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/**
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* The amount that the bottom of the block extends below the horizontal edge,
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* e.g. because of a next connection. Must be non-negative (see #2820).
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* @package
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* @type {number}
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*/
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this.descenderHeight = 0;
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/**
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* The Y position of the bottom edge of the block, relative to the origin
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* of the block rendering.
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* @type {number}
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*/
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this.baseline = 0;
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};
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object.inherits(BottomRow, Row);
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/**
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* Returns whether or not the bottom row has a left square corner.
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* @param {!BlockSvg} block The block whose bottom row this represents.
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* @return {boolean} Whether or not the bottom row has a left square corner.
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*/
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BottomRow.prototype.hasLeftSquareCorner = function(block) {
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return !!block.outputConnection || !!block.getNextBlock();
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};
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/**
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* Returns whether or not the bottom row has a right square corner.
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* @param {!BlockSvg} _block The block whose bottom row this represents.
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* @return {boolean} Whether or not the bottom row has a right square corner.
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*/
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BottomRow.prototype.hasRightSquareCorner = function(_block) {
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return true;
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};
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/**
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* @override
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*/
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BottomRow.prototype.measure = function() {
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let height = 0;
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let width = 0;
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let descenderHeight = 0;
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for (let i = 0; i < this.elements.length; i++) {
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const elem = this.elements[i];
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width += elem.width;
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if (!(Types.isSpacer(elem))) {
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// Note: this assumes that next connections have *only* descenderHeight,
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// with no height above the baseline.
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if (Types.isNextConnection(elem)) {
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descenderHeight = Math.max(descenderHeight, elem.height);
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} else {
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height = Math.max(height, elem.height);
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}
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}
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}
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this.width = Math.max(this.minWidth, width);
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this.height = Math.max(this.minHeight, height) + descenderHeight;
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this.descenderHeight = descenderHeight;
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this.widthWithConnectedBlocks = this.width;
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};
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/**
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* @override
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*/
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BottomRow.prototype.startsWithElemSpacer = function() {
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return false;
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};
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/**
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* @override
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*/
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BottomRow.prototype.endsWithElemSpacer = function() {
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return false;
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};
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exports.BottomRow = BottomRow;
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