HTML page script refactoring (#2162)

* Move some common functionality

* Move setupEnvironmentInfo into ExtensionContentController

* Move background/environment.js to extension/environment.js

1 files changed, 131 insertions, 0 deletions

diff --git a/ext/js/pages/common/extension-content-controller.js b/ext/js/pages/common/extension-content-controller.js
new file mode 100644
index 00000000..12adf41b
--- /dev/null
+++ b/ext/js/pages/common/extension-content-controller.js
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2022  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
+ * Environment
+ */
+
+class ExtensionContentController {
+    prepare() {
+        this._prepareSpecialUrls();
+        this._prepareExtensionIdExamples();
+        this._prepareEnvironmentInfo();
+    }
+
+    // Private
+
+    async _prepareEnvironmentInfo() {
+        const {dataset} = document.documentElement;
+        const {manifest_version: manifestVersion} = chrome.runtime.getManifest();
+        dataset.manifestVersion = `${manifestVersion}`;
+
+        const environment = new Environment();
+        await environment.prepare();
+
+        const {browser, platform} = environment.getInfo();
+        dataset.browser = browser;
+        dataset.os = platform.os;
+    }
+
+    _prepareExtensionIdExamples() {
+        const nodes = document.querySelectorAll('.extension-id-example');
+        let url = '';
+        try {
+            url = chrome.runtime.getURL('/');
+        } catch (e) {
+            // NOP
+        }
+        for (const node of nodes) {
+            node.textContent = url;
+        }
+    }
+
+    _prepareSpecialUrls() {
+        const nodes = document.querySelectorAll('[data-special-url]');
+        if (nodes.length === 0) { return; }
+
+        let extensionId = '';
+        try {
+            extensionId = chrome.runtime.id;
+        } catch (e) {
+            // NOP
+        }
+
+        const idPattern = /\{id\}/g;
+        const onSpecialUrlLinkClick = this._onSpecialUrlLinkClick.bind(this);
+        const onSpecialUrlLinkMouseDown = this._onSpecialUrlLinkMouseDown.bind(this);
+        for (const node of nodes) {
+            let {specialUrl} = node.dataset;
+            if (typeof specialUrl !== 'string') { specialUrl = ''; }
+            node.dataset.specialUrl = specialUrl.replace(idPattern, extensionId);
+            node.addEventListener('click', onSpecialUrlLinkClick, false);
+            node.addEventListener('auxclick', onSpecialUrlLinkClick, false);
+            node.addEventListener('mousedown', onSpecialUrlLinkMouseDown, false);
+        }
+    }
+
+    _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);
+                }
+            });
+        });
+    }
+}