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/* global DropLab */
(() => {
class FilteredSearchDropdownManager {
constructor() {
this.tokenizer = gl.FilteredSearchTokenizer;
this.filteredSearchInput = document.querySelector('.filtered-search');
this.setupMapping();
this.cleanupWrapper = this.cleanup.bind(this);
document.addEventListener('page:fetch', this.cleanupWrapper);
}
cleanup() {
if (this.droplab) {
this.droplab.destroy();
this.droplab = null;
}
this.setupMapping();
document.removeEventListener('page:fetch', this.cleanupWrapper);
}
setupMapping() {
this.mapping = {
author: {
reference: null,
gl: 'DropdownUser',
element: document.querySelector('#js-dropdown-author'),
},
assignee: {
reference: null,
gl: 'DropdownUser',
element: document.querySelector('#js-dropdown-assignee'),
},
milestone: {
reference: null,
gl: 'DropdownNonUser',
extraArguments: ['milestones.json', '%'],
element: document.querySelector('#js-dropdown-milestone'),
},
label: {
reference: null,
gl: 'DropdownNonUser',
extraArguments: ['labels.json', '~'],
element: document.querySelector('#js-dropdown-label'),
},
weight: {
reference: null,
gl: 'DropdownNonUser',
element: document.querySelector('#js-dropdown-weight'),
},
hint: {
reference: null,
gl: 'DropdownHint',
element: document.querySelector('#js-dropdown-hint'),
},
};
}
static addWordToInput(tokenName, tokenValue = '') {
const input = document.querySelector('.filtered-search');
const inputValue = input.value;
const word = `${tokenName}:${tokenValue}`;
// Get the string to replace
let newCaretPosition = input.selectionStart;
const { left, right } = gl.DropdownUtils.getInputSelectionPosition(input);
input.value = `${inputValue.substr(0, left)}${word}${inputValue.substr(right)}`;
// If we have added a tokenValue at the end of the input,
// add a space and set selection to the end
if (right >= inputValue.length && tokenValue !== '') {
input.value += ' ';
newCaretPosition = input.value.length;
}
gl.FilteredSearchDropdownManager.updateInputCaretPosition(newCaretPosition, input);
}
static updateInputCaretPosition(selectionStart, input) {
// Reset the position
// Sometimes can end up at end of input
input.setSelectionRange(selectionStart, selectionStart);
const { right } = gl.DropdownUtils.getInputSelectionPosition(input);
input.setSelectionRange(right, right);
}
updateCurrentDropdownOffset() {
this.updateDropdownOffset(this.currentDropdown);
}
updateDropdownOffset(key) {
if (!this.font) {
this.font = window.getComputedStyle(this.filteredSearchInput).font;
}
const input = this.filteredSearchInput;
const inputText = input.value.slice(0, input.selectionStart);
const filterIconPadding = 27;
let offset = gl.text.getTextWidth(inputText, this.font) + filterIconPadding;
const currentDropdownWidth = this.mapping[key].element.clientWidth === 0 ? 200 :
this.mapping[key].element.clientWidth;
const offsetMaxWidth = this.filteredSearchInput.clientWidth - currentDropdownWidth;
if (offsetMaxWidth < offset) {
offset = offsetMaxWidth;
}
this.mapping[key].reference.setOffset(offset);
}
load(key, firstLoad = false) {
const mappingKey = this.mapping[key];
const glClass = mappingKey.gl;
const element = mappingKey.element;
let forceShowList = false;
if (!mappingKey.reference) {
const dl = this.droplab;
const defaultArguments = [null, dl, element, this.filteredSearchInput, key];
const glArguments = defaultArguments.concat(mappingKey.extraArguments || []);
// Passing glArguments to `new gl[glClass](<arguments>)`
mappingKey.reference = new (Function.prototype.bind.apply(gl[glClass], glArguments))();
}
if (firstLoad) {
mappingKey.reference.init();
}
if (this.currentDropdown === 'hint') {
// Force the dropdown to show if it was clicked from the hint dropdown
forceShowList = true;
}
this.updateDropdownOffset(key);
mappingKey.reference.render(firstLoad, forceShowList);
this.currentDropdown = key;
}
loadDropdown(dropdownName = '') {
let firstLoad = false;
if (!this.droplab) {
firstLoad = true;
this.droplab = new DropLab();
}
const match = gl.FilteredSearchTokenKeys.searchByKey(dropdownName.toLowerCase());
const shouldOpenFilterDropdown = match && this.currentDropdown !== match.key
&& this.mapping[match.key];
const shouldOpenHintDropdown = !match && this.currentDropdown !== 'hint';
if (shouldOpenFilterDropdown || shouldOpenHintDropdown) {
const key = match && match.key ? match.key : 'hint';
this.load(key, firstLoad);
}
}
setDropdown() {
const { lastToken, searchToken } = this.tokenizer
.processTokens(gl.DropdownUtils.getSearchInput(this.filteredSearchInput));
if (this.currentDropdown) {
this.updateCurrentDropdownOffset();
}
if (lastToken === searchToken && lastToken !== null) {
// Token is not fully initialized yet because it has no value
// Eg. token = 'label:'
const split = lastToken.split(':');
const dropdownName = split[0].split(' ').last();
this.loadDropdown(split.length > 1 ? dropdownName : '');
} else if (lastToken) {
// Token has been initialized into an object because it has a value
this.loadDropdown(lastToken.key);
} else {
this.loadDropdown('hint');
}
}
resetDropdowns() {
// Force current dropdown to hide
this.mapping[this.currentDropdown].reference.hideDropdown();
// Re-Load dropdown
this.setDropdown();
// Reset filters for current dropdown
this.mapping[this.currentDropdown].reference.resetFilters();
// Reposition dropdown so that it is aligned with cursor
this.updateDropdownOffset(this.currentDropdown);
}
destroyDroplab() {
this.droplab.destroy();
}
}
window.gl = window.gl || {};
gl.FilteredSearchDropdownManager = FilteredSearchDropdownManager;
})();
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