Modal refactor (#842)

* Add Modal class

* Use Modal class

8 files changed, 115 insertions, 41 deletions

diff --git a/ext/bg/js/settings/anki-templates-controller.js b/ext/bg/js/settings/anki-templates-controller.js
index c980bfa2..f2e5be43 100644
--- a/ext/bg/js/settings/anki-templates-controller.js
+++ b/ext/bg/js/settings/anki-templates-controller.js
@@ -17,6 +17,7 @@
 
 /* global
  * AnkiNoteBuilder
+ * Modal
  * TemplateRendererProxy
  * api
  */
@@ -28,12 +29,15 @@ class AnkiTemplatesController {
         this._cachedDefinitionValue = null;
         this._cachedDefinitionText = null;
         this._defaultFieldTemplates = null;
+        this._fieldTemplateResetModal = null;
         this._templateRenderer = new TemplateRendererProxy();
     }
 
     async prepare() {
         this._defaultFieldTemplates = await api.getDefaultAnkiFieldTemplates();
 
+        this._fieldTemplateResetModal = new Modal(document.querySelector('#field-template-reset-modal'));
+
         const markers = new Set([
             ...this._ankiController.getFieldMarkers('terms'),
             ...this._ankiController.getFieldMarkers('kanji')
@@ -69,13 +73,13 @@ class AnkiTemplatesController {
 
     _onReset(e) {
         e.preventDefault();
-        $('#field-template-reset-modal').modal('show');
+        this._fieldTemplateResetModal.setVisible(true);
     }
 
     _onResetConfirm(e) {
         e.preventDefault();
 
-        $('#field-template-reset-modal').modal('hide');
+        this._fieldTemplateResetModal.setVisible(false);
 
         const value = this._defaultFieldTemplates;
 
diff --git a/ext/bg/js/settings/backup-controller.js b/ext/bg/js/settings/backup-controller.js
index 08ee7070..0676d451 100644
--- a/ext/bg/js/settings/backup-controller.js
+++ b/ext/bg/js/settings/backup-controller.js
@@ -16,6 +16,7 @@
  */
 
 /* global
+ * Modal
  * OptionsUtil
  * api
  */
@@ -26,12 +27,19 @@ class BackupController {
         this._settingsExportToken = null;
         this._settingsExportRevoke = null;
         this._currentVersion = 0;
+        this._settingsResetModal = null;
+        this._settingsImportErrorModal = null;
+        this._settingsImportWarningModal = null;
         this._optionsUtil = new OptionsUtil();
     }
 
     async prepare() {
         await this._optionsUtil.prepare();
 
+        this._settingsResetModal = new Modal(document.querySelector('#settings-reset-modal'));
+        this._settingsImportErrorModal = new Modal(document.querySelector('#settings-import-error-modal'));
+        this._settingsImportWarningModal = new Modal(document.querySelector('#settings-import-warning-modal'));
+
         document.querySelector('#settings-export').addEventListener('click', this._onSettingsExportClick.bind(this), false);
         document.querySelector('#settings-import').addEventListener('click', this._onSettingsImportClick.bind(this), false);
         document.querySelector('#settings-import-file').addEventListener('change', this._onSettingsImportFileChange.bind(this), false);
@@ -153,14 +161,14 @@ class BackupController {
     _showSettingsImportError(error) {
         yomichan.logError(error);
         document.querySelector('#settings-import-error-modal-message').textContent = `${error}`;
-        $('#settings-import-error-modal').modal('show');
+        this._settingsImportErrorModal.setVisible(true);
     }
 
     async _showSettingsImportWarnings(warnings) {
-        const modalNode = $('#settings-import-warning-modal');
+        const modal = this._settingsImportWarningModal;
         const buttons = document.querySelectorAll('.settings-import-warning-modal-import-button');
         const messageContainer = document.querySelector('#settings-import-warning-modal-message');
-        if (modalNode.length === 0 || buttons.length === 0 || messageContainer === null) {
+        if (buttons.length === 0 || messageContainer === null) {
             return {result: false};
         }
 
@@ -175,7 +183,7 @@ class BackupController {
         messageContainer.appendChild(fragment);
 
         // Show modal
-        modalNode.modal('show');
+        modal.setVisible(true);
 
         // Wait for modal to close
         return new Promise((resolve) => {
@@ -185,9 +193,10 @@ class BackupController {
                     result: true,
                     sanitize: e.currentTarget.dataset.importSanitize === 'true'
                 });
-                modalNode.modal('hide');
+                modal.setVisible(false);
             };
-            const onModalHide = () => {
+            const onModalVisibilityChanged = ({visible}) => {
+                if (visible) { return; }
                 complete({result: false});
             };
 
@@ -196,7 +205,7 @@ class BackupController {
                 if (completed) { return; }
                 completed = true;
 
-                modalNode.off('hide.bs.modal', onModalHide);
+                modal.off('visibilityChanged', onModalVisibilityChanged);
                 for (const button of buttons) {
                     button.removeEventListener('click', onButtonClick, false);
                 }
@@ -205,7 +214,7 @@ class BackupController {
             };
 
             // Hook events
-            modalNode.on('hide.bs.modal', onModalHide);
+            modal.on('visibilityChanged', onModalVisibilityChanged);
             for (const button of buttons) {
                 button.addEventListener('click', onButtonClick, false);
             }
@@ -368,11 +377,11 @@ class BackupController {
     // Resetting
 
     _onSettingsResetClick() {
-        $('#settings-reset-modal').modal('show');
+        this._settingsResetModal.setVisible(true);
     }
 
     async _onSettingsResetConfirmClick() {
-        $('#settings-reset-modal').modal('hide');
+        this._settingsResetModal.setVisible(false);
 
         // Get default options
         const optionsFull = this._optionsUtil.getDefault();
diff --git a/ext/bg/js/settings/dictionary-controller.js b/ext/bg/js/settings/dictionary-controller.js
index 75022d1f..afc198e2 100644
--- a/ext/bg/js/settings/dictionary-controller.js
+++ b/ext/bg/js/settings/dictionary-controller.js
@@ -16,6 +16,7 @@
  */
 
 /* global
+ * Modal
  * ObjectPropertyAccessor
  * api
  */
@@ -164,7 +165,7 @@ class DictionaryController {
         this._checkIntegrityButton = document.querySelector('#dict-check-integrity');
         this._dictionaryEntryContainer = document.querySelector('#dict-groups');
         this._integrityExtraInfoContainer = document.querySelector('#dict-groups-extra');
-        this._deleteDictionaryModal = document.querySelector('#dict-delete-modal');
+        this._deleteDictionaryModal = new Modal(document.querySelector('#dict-delete-modal'));
 
         yomichan.on('databaseUpdated', this._onDatabaseUpdated.bind(this));
 
@@ -177,9 +178,9 @@ class DictionaryController {
     deleteDictionary(dictionaryTitle) {
         if (this._isDeleting) { return; }
         const modal = this._deleteDictionaryModal;
-        modal.dataset.dictionaryTitle = dictionaryTitle;
-        modal.querySelector('#dict-remove-modal-dict-name').textContent = dictionaryTitle;
-        this._setModalVisible(modal, true);
+        modal.node.dataset.dictionaryTitle = dictionaryTitle;
+        modal.node.querySelector('#dict-remove-modal-dict-name').textContent = dictionaryTitle;
+        modal.setVisible(true);
     }
 
     // Private
@@ -209,11 +210,11 @@ class DictionaryController {
         e.preventDefault();
 
         const modal = this._deleteDictionaryModal;
-        this._setModalVisible(modal, false);
+        modal.setVisible(false);
 
-        const title = modal.dataset.dictionaryTitle;
+        const title = modal.node.dataset.dictionaryTitle;
         if (typeof title !== 'string') { return; }
-        delete modal.dataset.dictionaryTitle;
+        delete modal.node.dataset.dictionaryTitle;
 
         this._deleteDictionary(title);
     }
@@ -223,10 +224,6 @@ class DictionaryController {
         this._checkIntegrity();
     }
 
-    _setModalVisible(node, visible) {
-        $(node).modal(visible ? 'show' : 'hide');
-    }
-
     _updateMainDictionarySelectOptions(dictionaries) {
         const fragment = document.createDocumentFragment();
 
diff --git a/ext/bg/js/settings/dictionary-import-controller.js b/ext/bg/js/settings/dictionary-import-controller.js
index dd4889dc..a78378e8 100644
--- a/ext/bg/js/settings/dictionary-import-controller.js
+++ b/ext/bg/js/settings/dictionary-import-controller.js
@@ -18,6 +18,7 @@
 /* global
  * DictionaryDatabase
  * DictionaryImporter
+ * Modal
  * ObjectPropertyAccessor
  * api
  */
@@ -53,7 +54,7 @@ class DictionaryImportController {
         this._purgeConfirmButton = document.querySelector('#dict-purge-confirm');
         this._importFileButton = document.querySelector('#dict-file-button');
         this._importFileInput = document.querySelector('#dict-file');
-        this._purgeConfirmModal = document.querySelector('#dict-purge-modal');
+        this._purgeConfirmModal = new Modal(document.querySelector('#dict-purge-modal'));
         this._errorContainer = document.querySelector('#dict-error');
         this._spinner = document.querySelector('#dict-spinner');
         this._progressContainer = document.querySelector('#dict-import-progress');
@@ -75,12 +76,12 @@ class DictionaryImportController {
 
     _onPurgeButtonClick(e) {
         e.preventDefault();
-        this._setPurgeModalVisible(true);
+        this._purgeConfirmModal.setVisible(true);
     }
 
     _onPurgeConfirmButtonClick(e) {
         e.preventDefault();
-        this._setPurgeModalVisible(false);
+        this._purgeConfirmModal.setVisible(false);
         this._purgeDatabase();
     }
 
@@ -220,11 +221,6 @@ class DictionaryImportController {
         return await this._modifyGlobalSettings(targets);
     }
 
-    _setPurgeModalVisible(visible) {
-        const node = $(this._purgeConfirmModal);
-        node.modal(visible ? 'show' : 'hide');
-    }
-
     _setSpinnerVisible(visible) {
         this._spinner.hidden = !visible;
     }
diff --git a/ext/bg/js/settings/modal.js b/ext/bg/js/settings/modal.js
new file mode 100644
index 00000000..42a511ca
--- /dev/null
+++ b/ext/bg/js/settings/modal.js
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2020  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/>.
+ */
+
+class Modal extends EventDispatcher {
+    constructor(node) {
+        super();
+        this._node = node;
+        this._eventListeners = new EventListenerCollection();
+    }
+
+    get node() {
+        return this._node;
+    }
+
+    setVisible(value) {
+        this._getWrappedNode().modal(value ? 'show' : 'hide');
+    }
+
+    on(eventName, callback) {
+        if (eventName === 'visibilityChanged') {
+            if (this._eventListeners.size === 0) {
+                const wrappedNode = this._getWrappedNode();
+                this._eventListeners.on(wrappedNode, 'hidden.bs.modal', this._onModalHide.bind(this));
+                this._eventListeners.on(wrappedNode, 'shown.bs.modal', this._onModalShow.bind(this));
+            }
+        }
+        return super.on(eventName, callback);
+    }
+
+    off(eventName, callback) {
+        const result = super.off(eventName, callback);
+        if (eventName === 'visibilityChanged' && !this.hasListeners(eventName)) {
+            this._eventListeners.removeAllEventListeners();
+        }
+        return result;
+    }
+
+    // Private
+
+    _onModalHide() {
+        this.trigger('visibilityChanged', {visible: false});
+    }
+
+    _onModalShow() {
+        this.trigger('visibilityChanged', {visible: true});
+    }
+
+    _getWrappedNode() {
+        return $(this._node);
+    }
+}
diff --git a/ext/bg/js/settings/profile-controller.js b/ext/bg/js/settings/profile-controller.js
index fd7137be..7c6dfae5 100644
--- a/ext/bg/js/settings/profile-controller.js
+++ b/ext/bg/js/settings/profile-controller.js
@@ -16,6 +16,7 @@
  */
 
 /* global
+ * Modal
  * ProfileConditionsUI
  * api
  */
@@ -51,8 +52,8 @@ class ProfileController {
         this._profileCopyButton = document.querySelector('#profile-copy');
         this._profileMoveUpButton = document.querySelector('#profile-move-up');
         this._profileMoveDownButton = document.querySelector('#profile-move-down');
-        this._profileRemoveModal = document.querySelector('#profile-remove-modal');
-        this._profileCopyModal = document.querySelector('#profile-copy-modal');
+        this._profileRemoveModal = new Modal(document.querySelector('#profile-remove-modal'));
+        this._profileCopyModal = new Modal(document.querySelector('#profile-copy-modal'));
 
         this._profileActiveSelect.addEventListener('change', this._onProfileActiveChange.bind(this), false);
         this._profileTargetSelect.addEventListener('change', this._onProfileTargetChange.bind(this), false);
@@ -135,11 +136,11 @@ class ProfileController {
         const profileIndex = this._settingsController.profileIndex;
         const profile = this._optionsFull.profiles[profileIndex];
         this._removeProfileNameElement.textContent = profile.name;
-        this._setModalVisible(this._profileRemoveModal, true);
+        this._profileRemoveModal.setVisible(true);
     }
 
     _onRemoveConfirm() {
-        this._setModalVisible(this._profileRemoveModal, false);
+        this._profileRemoveModal.setVisible(false);
         if (this._optionsFull.profiles.length <= 1) { return; }
         const profileIndex = this._settingsController.profileIndex;
         this._removeProfile(profileIndex);
@@ -160,11 +161,11 @@ class ProfileController {
         }
         this._profileCopySourceSelect.value = `${copyFromIndex}`;
 
-        this._setModalVisible(this._profileCopyModal, true);
+        this._profileCopyModal.setVisible(true);
     }
 
     _onCopyConfirm() {
-        this._setModalVisible(this._profileCopyModal, false);
+        this._profileCopyModal.setVisible(false);
 
         const profileIndex = this._settingsController.profileIndex;
         const max = this._optionsFull.profiles.length;
@@ -265,10 +266,6 @@ class ProfileController {
         return null;
     }
 
-    _setModalVisible(node, visible) {
-        $(node).modal(visible ? 'show' : 'hide');
-    }
-
     async _addProfile() {
         const profileIndex = this._settingsController.profileIndex;
         const profiles = this._optionsFull.profiles;
diff --git a/ext/bg/settings.html b/ext/bg/settings.html
index 7141776c..9c8621f7 100644
--- a/ext/bg/settings.html
+++ b/ext/bg/settings.html
@@ -1216,6 +1216,7 @@
         <script src="/bg/js/template-renderer-proxy.js"></script>
 
         <script src="/bg/js/settings/keyboard-mouse-input-field.js"></script>
+        <script src="/bg/js/settings/modal.js"></script>
         <script src="/bg/js/settings/profile-conditions-ui.js"></script>
 
         <script src="/bg/js/settings/anki-controller.js"></script>
diff --git a/ext/mixed/js/core.js b/ext/mixed/js/core.js
index 351d9371..7eb21659 100644
--- a/ext/mixed/js/core.js
+++ b/ext/mixed/js/core.js
@@ -325,6 +325,11 @@ class EventDispatcher {
         }
         return false;
     }
+
+    hasListeners(eventName) {
+        const callbacks = this._eventMap.get(eventName);
+        return (typeof callbacks !== 'undefined' && callbacks.length > 0);
+    }
 }
 
 class EventListenerCollection {