1 files changed, 400 insertions, 0 deletions
diff --git a/ext/js/pages/settings/settings-display-controller.js b/ext/js/pages/settings/settings-display-controller.js
new file mode 100644
index 00000000..9d3e5459
--- /dev/null
+++ b/ext/js/pages/settings/settings-display-controller.js
@@ -0,0 +1,400 @@
+/*
+ * Copyright (C) 2020-2021  Yomichan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* global
+ * PopupMenu
+ * SelectorObserver
+ */
+
+class SettingsDisplayController {
+    constructor(settingsController, modalController) {
+        this._settingsController = settingsController;
+        this._modalController = modalController;
+        this._contentNode = null;
+        this._menuContainer = null;
+        this._onMoreToggleClickBind = null;
+        this._onMenuButtonClickBind = null;
+    }
+
+    prepare() {
+        this._contentNode = document.querySelector('.content');
+        this._menuContainer = document.querySelector('#popup-menus');
+
+        const onFabButtonClick = this._onFabButtonClick.bind(this);
+        for (const fabButton of document.querySelectorAll('.fab-button')) {
+            fabButton.addEventListener('click', onFabButtonClick, false);
+        }
+
+        const onModalAction = this._onModalAction.bind(this);
+        for (const node of document.querySelectorAll('[data-modal-action]')) {
+            node.addEventListener('click', onModalAction, false);
+        }
+
+        const onSelectOnClickElementClick = this._onSelectOnClickElementClick.bind(this);
+        for (const node of document.querySelectorAll('[data-select-on-click]')) {
+            node.addEventListener('click', onSelectOnClickElementClick, false);
+        }
+
+        const onInputTabActionKeyDown = this._onInputTabActionKeyDown.bind(this);
+        for (const node of document.querySelectorAll('[data-tab-action]')) {
+            node.addEventListener('keydown', onInputTabActionKeyDown, false);
+        }
+
+        const onSpecialUrlLinkClick = this._onSpecialUrlLinkClick.bind(this);
+        const onSpecialUrlLinkMouseDown = this._onSpecialUrlLinkMouseDown.bind(this);
+        for (const node of document.querySelectorAll('[data-special-url]')) {
+            node.addEventListener('click', onSpecialUrlLinkClick, false);
+            node.addEventListener('auxclick', onSpecialUrlLinkClick, false);
+            node.addEventListener('mousedown', onSpecialUrlLinkMouseDown, false);
+        }
+
+        for (const node of document.querySelectorAll('.defer-load-iframe')) {
+            this._setupDeferLoadIframe(node);
+        }
+
+        this._onMoreToggleClickBind = this._onMoreToggleClick.bind(this);
+        const moreSelectorObserver = new SelectorObserver({
+            selector: '.more-toggle',
+            onAdded: this._onMoreSetup.bind(this),
+            onRemoved: this._onMoreCleanup.bind(this)
+        });
+        moreSelectorObserver.observe(document.documentElement, false);
+
+        this._onMenuButtonClickBind = this._onMenuButtonClick.bind(this);
+        const menuSelectorObserver = new SelectorObserver({
+            selector: '[data-menu]',
+            onAdded: this._onMenuSetup.bind(this),
+            onRemoved: this._onMenuCleanup.bind(this)
+        });
+        menuSelectorObserver.observe(document.documentElement, false);
+
+        window.addEventListener('keydown', this._onKeyDown.bind(this), false);
+        window.addEventListener('popstate', this._onPopState.bind(this), false);
+        this._updateScrollTarget();
+    }
+
+    // Private
+
+    _onMoreSetup(element) {
+        element.addEventListener('click', this._onMoreToggleClickBind, false);
+        return null;
+    }
+
+    _onMoreCleanup(element) {
+        element.removeEventListener('click', this._onMoreToggleClickBind, false);
+    }
+
+    _onMenuSetup(element) {
+        element.addEventListener('click', this._onMenuButtonClickBind, false);
+        return null;
+    }
+
+    _onMenuCleanup(element) {
+        element.removeEventListener('click', this._onMenuButtonClickBind, false);
+    }
+
+    _onMenuButtonClick(e) {
+        const element = e.currentTarget;
+        const {menu} = element.dataset;
+        this._showMenu(element, menu);
+    }
+
+    _onFabButtonClick(e) {
+        const action = e.currentTarget.dataset.action;
+        switch (action) {
+            case 'toggle-sidebar':
+                document.body.classList.toggle('sidebar-visible');
+                break;
+            case 'toggle-preview-sidebar':
+                document.body.classList.toggle('preview-sidebar-visible');
+                break;
+        }
+    }
+
+    _onMoreToggleClick(e) {
+        const container = this._getMoreContainer(e.currentTarget);
+        if (container === null) { return; }
+
+        const more = container.querySelector('.more');
+        if (more === null) { return; }
+
+        const moreVisible = more.hidden;
+        more.hidden = !moreVisible;
+        for (const moreToggle of container.querySelectorAll('.more-toggle')) {
+            const container2 = this._getMoreContainer(moreToggle);
+            if (container2 === null) { continue; }
+
+            const more2 = container2.querySelector('.more');
+            if (more2 === null || more2 !== more) { continue; }
+
+            moreToggle.dataset.expanded = `${moreVisible}`;
+        }
+
+        e.preventDefault();
+        return false;
+    }
+
+    _onPopState() {
+        this._updateScrollTarget();
+    }
+
+    _onKeyDown(e) {
+        switch (e.code) {
+            case 'Escape':
+                if (!this._isElementAnInput(document.activeElement)) {
+                    this._closeTopMenuOrModal();
+                    e.preventDefault();
+                }
+                break;
+        }
+    }
+
+    _onModalAction(e) {
+        const node = e.currentTarget;
+        const {modalAction} = node.dataset;
+        if (typeof modalAction !== 'string') { return; }
+
+        let [action, target] = modalAction.split(',');
+        if (typeof target === 'undefined') {
+            const currentModal = node.closest('.modal');
+            if (currentModal === null) { return; }
+            target = currentModal;
+        }
+
+        const modal = this._modalController.getModal(target);
+        if (modal === null) { return; }
+
+        switch (action) {
+            case 'show':
+                modal.setVisible(true);
+                break;
+            case 'hide':
+                modal.setVisible(false);
+                break;
+            case 'toggle':
+                modal.setVisible(!modal.isVisible());
+                break;
+        }
+
+        e.preventDefault();
+    }
+
+    _onSelectOnClickElementClick(e) {
+        if (e.button !== 0) { return; }
+
+        const node = e.currentTarget;
+        const range = document.createRange();
+        range.selectNode(node);
+
+        const selection = window.getSelection();
+        selection.removeAllRanges();
+        selection.addRange(range);
+
+        e.preventDefault();
+        e.stopPropagation();
+        return false;
+    }
+
+    _onInputTabActionKeyDown(e) {
+        if (e.key !== 'Tab' || e.ctrlKey) { return; }
+
+        const node = e.currentTarget;
+        const {tabAction} = node.dataset;
+        if (typeof tabAction !== 'string') { return; }
+
+        const args = tabAction.split(',');
+        switch (args[0]) {
+            case 'ignore':
+                e.preventDefault();
+                break;
+            case 'indent':
+                e.preventDefault();
+                this._indentInput(e, node, args);
+                break;
+        }
+    }
+
+    _onSpecialUrlLinkClick(e) {
+        switch (e.button) {
+            case 0:
+            case 1:
+                e.preventDefault();
+                this._createTab(e.currentTarget.dataset.specialUrl, true);
+                break;
+        }
+    }
+
+    _onSpecialUrlLinkMouseDown(e) {
+        switch (e.button) {
+            case 0:
+            case 1:
+                e.preventDefault();
+                break;
+        }
+    }
+
+    async _createTab(url, useOpener) {
+        let openerTabId;
+        if (useOpener) {
+            try {
+                const tab = await new Promise((resolve, reject) => {
+                    chrome.tabs.getCurrent((result) => {
+                        const e = chrome.runtime.lastError;
+                        if (e) {
+                            reject(new Error(e.message));
+                        } else {
+                            resolve(result);
+                        }
+                    });
+                });
+                openerTabId = tab.id;
+            } catch (e) {
+                // NOP
+            }
+        }
+
+        return await new Promise((resolve, reject) => {
+            chrome.tabs.create({url, openerTabId}, (tab2) => {
+                const e = chrome.runtime.lastError;
+                if (e) {
+                    reject(new Error(e.message));
+                } else {
+                    resolve(tab2);
+                }
+            });
+        });
+    }
+
+    _updateScrollTarget() {
+        const hash = window.location.hash;
+        if (!hash.startsWith('#!')) { return; }
+
+        const content = this._contentNode;
+        const target = document.getElementById(hash.substring(2));
+        if (content === null || target === null) { return; }
+
+        const rect1 = content.getBoundingClientRect();
+        const rect2 = target.getBoundingClientRect();
+        content.scrollTop += rect2.top - rect1.top;
+    }
+
+    _getMoreContainer(link) {
+        const v = link.dataset.parentDistance;
+        const distance = v ? parseInt(v, 10) : 1;
+        if (Number.isNaN(distance)) { return null; }
+
+        for (let i = 0; i < distance; ++i) {
+            link = link.parentNode;
+            if (link === null) { break; }
+        }
+        return link;
+    }
+
+    _closeTopMenuOrModal() {
+        for (const popupMenu of PopupMenu.openMenus) {
+            popupMenu.close();
+            return;
+        }
+
+        const modal = this._modalController.getTopVisibleModal();
+        if (modal !== null) {
+            modal.setVisible(false);
+        }
+    }
+
+    _showMenu(element, menuName) {
+        const menu = this._settingsController.instantiateTemplate(menuName);
+        if (menu === null) { return; }
+
+        this._menuContainer.appendChild(menu);
+
+        const popupMenu = new PopupMenu(element, menu);
+        popupMenu.prepare();
+    }
+
+    _indentInput(e, node, args) {
+        let indent = '\t';
+        if (args.length > 1) {
+            const count = parseInt(args[1], 10);
+            indent = (Number.isFinite(count) && count >= 0 ? ' '.repeat(count) : args[1]);
+        }
+
+        const {selectionStart: start, selectionEnd: end, value} = node;
+        const lineStart = value.substring(0, start).lastIndexOf('\n') + 1;
+        const lineWhitespace = /^[ \t]*/.exec(value.substring(lineStart))[0];
+
+        if (e.shiftKey) {
+            const whitespaceLength = Math.max(0, Math.floor((lineWhitespace.length - 1) / 4) * 4);
+            const selectionStartNew = lineStart + whitespaceLength;
+            const selectionEndNew = lineStart + lineWhitespace.length;
+            const removeCount = selectionEndNew - selectionStartNew;
+            if (removeCount > 0) {
+                node.selectionStart = selectionStartNew;
+                node.selectionEnd = selectionEndNew;
+                document.execCommand('delete', false);
+                node.selectionStart = Math.max(lineStart, start - removeCount);
+                node.selectionEnd = Math.max(lineStart, end - removeCount);
+            }
+        } else {
+            if (indent.length > 0) {
+                const indentLength = (Math.ceil((start - lineStart + 1) / indent.length) * indent.length - (start - lineStart));
+                document.execCommand('insertText', false, indent.substring(0, indentLength));
+            }
+        }
+    }
+
+    _isElementAnInput(element) {
+        const type = element !== null ? element.nodeName.toUpperCase() : null;
+        switch (type) {
+            case 'INPUT':
+            case 'TEXTAREA':
+            case 'SELECT':
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    _setupDeferLoadIframe(element) {
+        const parent = this._getMoreContainer(element);
+        if (parent === null) { return; }
+
+        let mutationObserver = null;
+        const callback = () => {
+            if (!this._isElementVisible(element)) { return false; }
+
+            const src = element.dataset.src;
+            delete element.dataset.src;
+            element.src = src;
+
+            if (mutationObserver === null) { return true; }
+
+            mutationObserver.disconnect();
+            mutationObserver = null;
+            return true;
+        };
+
+        if (callback()) { return; }
+
+        mutationObserver = new MutationObserver(callback);
+        mutationObserver.observe(parent, {attributes: true});
+    }
+
+    _isElementVisible(element) {
+        return (element.offsetParent !== null);
+    }
+}