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ui.js
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/* ui.js
* handle app ui rendering and updates
* handle global settings
* handle ui and backend interactions
*/
/* constants
* - left_select (element select)
* - right_select ( ^^ )
* - left_checkbox_label (element label)
* - right_checkbox_label ( ^^ )
* - left_box_display (element div)
* - right_box_display ( ^^ )
* - left_textarea_input (element textarea)
* - right_textarea_output ( ^^ )
* - button_translate (element button)
* - button_swap ( ^^ )
* - ui_set_left_lang_to_dec (function: void -> void)
* - ui_set_right_lang_to_dec ( ^^ )
* - ui_set_lang_to_tetra (function: object, string -> void)
* - ui_textarea_placeholder_input_dec (string)
* - ui_textarea_placeholder_input_tetra (string)
* - ui_swap (function: void -> void)
*/
/* global settings
* - left_lang (const object { tetra (boolean), suits_ranking (string), ace_high (boolean) })
* - right_lang (const object { ^^ })
*/
/* ************************************************************************* */
/* global settings */
const left_lang = {
tetra: true,
suits_ranking: 'alternating',
ace_high: false
};
const right_lang = {
tetra: false,
suits_ranking: '',
ace_high: false
};
/* init settings in ui */
const left_select = document.querySelector('select#left-lang');
const right_select = document.querySelector('select#right-lang');
left_select.selectedIndex = 1;
right_select.selectedIndex = 0;
const left_checkbox_label = document.querySelector('label#left-checkbox-label');
const right_checkbox_label = document.querySelector('label#right-checkbox-label');
left_checkbox_label.style.display = 'block';
const left_box_display = document.querySelector('div#left-box-display');
const right_box_display = document.querySelector('div#right-box-display');
left_box_display.style.display = 'block'; // so that the value is not undefined
right_box_display.style.display = 'none';
const left_textarea_input = document.querySelector('textarea#left-textarea-input');
const right_textarea_output = document.querySelector('textarea#right-textarea-output');
const button_translate = document.querySelector('button#btn-translate');
const button_swap = document.querySelector('button#btn-swap');
(() => {
const window_width = parseInt(window.innerWidth);
const button_width = parseInt(button_translate.offsetWidth);
const offset = parseInt((window_width - button_width) / 2) - 1;
button_translate.style.left = offset + 'px';
button_swap.style.left = offset + 'px';
})();
/* ************************************************************************* */
const ui_set_left_lang_to_dec = () => {
left_lang.tetra = false;
left_lang.suits_ranking = '';
};
const ui_set_right_lang_to_dec = () => {
right_lang.tetra = false;
right_lang.suits_ranking = '';
};
const ui_set_lang_to_tetra = (lang, ranking) => {
lang.tetra = true;
lang.suits_ranking = ranking;
};
const ui_textarea_placeholder_input_dec = 'Input a decimal number';
const ui_textarea_placeholder_input_tetra = 'Input a tetra-sexagesimal number';
/* settings listeners */
document.querySelector('input[name="left-checkbox"]').addEventListener('change', function() { /* left checkbox */
left_lang.ace_high = this.checked;
if (left_textarea_input.value.length > 0) button_translate.click();
});
document.querySelector('input[name="right-checkbox"]').addEventListener('change', function() { /* right checkbox */
right_lang.ace_high = this.checked;
if (left_textarea_input.value.length > 0) button_translate.click();
});
left_select.addEventListener('change', function() { /* left select */
const v = this.value;
if (v === 'dec') {
left_box_display.style.display = 'none';
left_checkbox_label.style.display = 'none';
ui_set_left_lang_to_dec();
left_textarea_input.attributes.placeholder.value = ui_textarea_placeholder_input_dec;
} else {
left_box_display.style.display = 'block';
left_checkbox_label.style.display = 'block';
ui_set_lang_to_tetra(left_lang, v);
left_textarea_input.attributes.placeholder.value = ui_textarea_placeholder_input_tetra;
}
left_textarea_input.value = '';
left_box_display.innerHTML = '';
});
right_select.addEventListener('change', function() { /* right select */
const v = this.value;
if (v === 'dec') {
right_box_display.style.display = 'none';
right_checkbox_label.style.display = 'none';
ui_set_right_lang_to_dec();
} else {
right_box_display.style.display = 'block';
right_checkbox_label.style.display = 'block';
ui_set_lang_to_tetra(right_lang, v);
}
right_textarea_output.value = '';
right_box_display.innerHTML = '';
// auto-translate when left side has input
if (left_textarea_input.value.length > 0) button_translate.click();
});
button_swap.addEventListener('click', () => ui_swap()); /* swap button click */
button_translate.addEventListener('click', () => {
const input = left_textarea_input.value.replace(/[^a-zA-Z0-9]/g, '');
if (input.length <= 0) return;
if (left_lang.tetra && !right_lang.tetra) {
const T = parse_tetra(input, left_lang);
right_textarea_output.value = tet2dec(T);
left_box_display.innerHTML = mk_tetra_display(T, left_lang);
} else if (left_lang.tetra && right_lang.tetra) {
const T = parse_tetra(input, left_lang);
const S = mk_tetra(T, right_lang);
right_textarea_output.value = S;
right_box_display.innerHTML = mk_tetra_display(T, right_lang);
left_box_display.innerHTML = mk_tetra_display(T, left_lang);
} else if (right_lang.tetra) {
const T = dec2tet(parseInt(input));
const S = mk_tetra(T, right_lang);
right_textarea_output.value = S;
right_box_display.innerHTML = mk_tetra_display(T, right_lang);
} else {
right_textarea_output.value = parseInt(input);
}
});
/* ************************************************************************* */
const ui_swap = () => {
// swap values inside input/output textareas
[left_textarea_input.value, right_textarea_output.value] =
[right_textarea_output.value, left_textarea_input.value];
// swap values inside display boxes
[left_box_display.innerHTML, right_box_display.innerHTML] =
[right_box_display.innerHTML, left_box_display.innerHTML];
// swap display style of display boxes
[left_box_display.style.display, right_box_display.style.display] =
[right_box_display.style.display, left_box_display.style.display];
// swap values of ace_high checkboxes
document.querySelector('input[name="right-checkbox"]').checked = left_lang.ace_high;
document.querySelector('input[name="left-checkbox"]').checked = right_lang.ace_high;
// swap display style of ace_high checkboxes
[left_checkbox_label.style.display, right_checkbox_label.style.display] =
[right_checkbox_label.style.display, left_checkbox_label.style.display];
// swap values of language select options
[left_select.value, right_select.value] = [right_select.value, left_select.value];
// swap language definition objects
[left_lang.tetra, right_lang.tetra] = [right_lang.tetra, left_lang.tetra];
[left_lang.suits_ranking, right_lang.suits_ranking] =
[right_lang.suits_ranking, left_lang.suits_ranking];
[left_lang.ace_high, right_lang.ace_high] = [right_lang.ace_high, left_lang.ace_high];
// update left textarea input placeholder value
left_textarea_input.attributes.placeholder.value = left_lang.tetra ?
ui_textarea_placeholder_input_tetra :
ui_textarea_placeholder_input_dec;
// clear out everything except left textarea input
left_box_display.innerHTML = '';
right_textarea_output.value = '';
right_box_display.innerHTML = '';
};