71 lines
2.6 KiB
JavaScript
71 lines
2.6 KiB
JavaScript
// Charset nodes are used for `[abc1-9]` regular expression syntax. It is
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// rendered as a labeled box with each literal, escape, and range rendering
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// handled by the nested node(s).
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import util from '../../util.js';
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import _ from 'lodash';
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export default {
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type: 'charset',
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definedProperties: {
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// Default anchor is overridden to move it down so that it connects at the
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// middle of the box that wraps all of the charset parts, instead of the
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// middle of the container, which would take the label into account.
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_anchor: {
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get: function() {
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var matrix = this.transform().localMatrix;
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return {
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ay: matrix.y(0, this.partContainer.getBBox().cy)
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};
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}
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}
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},
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// Renders the charset into the currently set container.
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_render() {
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this.partContainer = this.container.group();
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// Renders each part of the charset into the part container.
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return Promise.all(_.map(this.elements, part => {
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return part.render(this.partContainer.group());
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}))
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.then(() => {
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// Space the parts of the charset vertically in the part container.
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util.spaceVertically(this.elements, {
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padding: 5
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});
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// Label the part container.
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return this.renderLabeledBox(this.label, this.partContainer, {
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padding: 5
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});
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});
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},
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setup() {
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// The label for the charset will be:
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// - "One of:" for charsets of the form: `[abc]`.
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// - "None of:" for charsets of the form: `[^abc]`.
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this.label = (this.properties.invert.textValue === '^') ? 'None of:' : 'One of:';
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// Removes any duplicate parts from the charset. This is based on the type
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// and text value of the part, so `[aa]` will have only one item, but
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// `[a\x61]` will contain two since the first matches "a" and the second
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// matches 0x61 (even though both are an "a").
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this.elements = _.unique(this.properties.parts.elements, part => {
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return `${part.type}:${part.textValue}`;
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});
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// Include a warning for charsets that attempt to match `\c` followed by
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// any character other than A-Z (case insensitive). Charsets like `[\c@]`
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// behave differently in different browsers. Some match the character
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// reference by the control charater escape, others match "\", "c", or "@",
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// and some do not appear to match anything.
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if (this.textValue.match(/\\c[^a-zA-Z]/)) {
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this.state.warnings.push(`The character set "${this.textValue}" contains the \\c escape followed by a character other than A-Z. This can lead to different behavior depending on browser. The representation here is the most common interpretation.`);
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}
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}
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}
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