Add support for showing recursive popups

8 files changed, 500 insertions, 12 deletions

diff --git a/ext/fg/float.html b/ext/fg/float.html
index 0133e653..bd08296a 100644
--- a/ext/fg/float.html
+++ b/ext/fg/float.html
@@ -43,5 +43,11 @@
         <script src="/mixed/js/display.js"></script>
 
         <script src="/fg/js/float.js"></script>
+
+        <!-- TODO : Make these conditional based on options -->
+        <script src="/fg/js/frontend-api-sender.js"></script>
+        <script src="/fg/js/popup.js"></script>
+        <script src="/fg/js/popup-proxy.js"></script>
+        <script src="/fg/js/frontend.js"></script>
     </body>
 </html>
diff --git a/ext/fg/js/frontend-api-receiver.js b/ext/fg/js/frontend-api-receiver.js
new file mode 100644
index 00000000..f5d29f67
--- /dev/null
+++ b/ext/fg/js/frontend-api-receiver.js
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class FrontendApiReceiver {
+    constructor(source='', handlers={}) {
+        this.source = source;
+        this.handlers = handlers;
+
+        chrome.runtime.onConnect.addListener(this.onConnect.bind(this));
+    }
+
+    onConnect(port) {
+        if (port.name !== 'frontend-api-receiver') { return; }
+
+        port.onMessage.addListener(this.onMessage.bind(this, port));
+    }
+
+    onMessage(port, {id, action, params, target}) {
+        if (
+            target !== this.source ||
+            !this.handlers.hasOwnProperty(action)
+        ) {
+            return;
+        }
+
+        this.sendAck(port, id);
+
+        const handler = this.handlers[action];
+        handler(params).then(
+            result => {
+                this.sendResult(port, id, {result});
+            },
+            e => {
+                const error = typeof e.toString === 'function' ? e.toString() : e;
+                this.sendResult(port, id, {error});
+            });
+    }
+
+    sendAck(port, id) {
+        port.postMessage({type: 'ack', id});
+    }
+
+    sendResult(port, id, data) {
+        port.postMessage({type: 'result', id, data});
+    }
+}
diff --git a/ext/fg/js/frontend-api-sender.js b/ext/fg/js/frontend-api-sender.js
new file mode 100644
index 00000000..e2becb90
--- /dev/null
+++ b/ext/fg/js/frontend-api-sender.js
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class FrontendApiSender {
+    constructor() {
+        this.ackTimeout = 3000; // 3 seconds
+        this.responseTimeout = 10000; // 10 seconds
+        this.callbacks = {};
+        this.disconnected = false;
+        this.nextId = 0;
+
+        this.port = chrome.runtime.connect(null, {name: 'backend-api-forwarder'});
+        this.port.onDisconnect.addListener(this.onDisconnect.bind(this));
+        this.port.onMessage.addListener(this.onMessage.bind(this));
+    }
+
+    invoke(action, params, target) {
+        if (this.disconnected) {
+            return Promise.reject('Disconnected');
+        }
+
+        const id = `${this.nextId}`;
+        ++this.nextId;
+
+        return new Promise((resolve, reject) => {
+            const info = {id, resolve, reject, ack: false, timer: null};
+            this.callbacks[id] = info;
+            info.timer = setTimeout(() => this.onError(id, 'Timeout (ack)'), this.ackTimeout);
+
+            this.port.postMessage({id, action, params, target});
+        });
+    }
+
+    onMessage({type, id, data}) {
+        switch (type) {
+            case 'ack':
+                this.onAck(id);
+                break;
+            case 'result':
+                this.onResult(id, data);
+                break;
+        }
+    }
+
+    onDisconnect() {
+        this.disconnected = true;
+
+        const ids = Object.keys(this.callbacks);
+        for (const id of ids) {
+            this.onError(id, 'Disconnected');
+        }
+    }
+
+    onAck(id) {
+        if (!this.callbacks.hasOwnProperty(id)) {
+            console.warn(`ID ${id} not found`);
+            return;
+        }
+
+        const info = this.callbacks[id];
+        if (info.ack) {
+            console.warn(`Request ${id} already ack'd`);
+            return;
+        }
+
+        info.ack = true;
+        clearTimeout(info.timer);
+        info.timer = setTimeout(() => this.onError(id, 'Timeout (response)'), this.responseTimeout);
+    }
+
+    onResult(id, data) {
+        if (!this.callbacks.hasOwnProperty(id)) {
+            console.warn(`ID ${id} not found`);
+            return;
+        }
+
+        const info = this.callbacks[id];
+        if (!info.ack) {
+            console.warn(`Request ${id} not ack'd`);
+            return;
+        }
+
+        delete this.callbacks[id];
+        clearTimeout(info.timer);
+        info.timer = null;
+
+        if (typeof data.error === 'string') {
+            info.reject(data.error);
+        } else {
+            info.resolve(data.result);
+        }
+    }
+
+    onError(id, reason) {
+        if (!this.callbacks.hasOwnProperty(id)) { return; }
+        const info = this.callbacks[id];
+        delete this.callbacks[id];
+        info.timer = null;
+        info.reject(reason);
+    }
+
+    static generateId(length) {
+        let id = '';
+        for (let i = 0; i < length; ++i) {
+            id += Math.floor(Math.random() * 256).toString(16).padStart(2, '0');
+        }
+        return id;
+    }
+}
diff --git a/ext/fg/js/frontend.js b/ext/fg/js/frontend.js
index 8a5c48d0..d378dd61 100644
--- a/ext/fg/js/frontend.js
+++ b/ext/fg/js/frontend.js
@@ -18,8 +18,8 @@
 
 
 class Frontend {
-    constructor() {
-        this.popup = new Popup();
+    constructor(popup) {
+        this.popup = popup;
         this.popupTimer = null;
         this.mouseDownLeft = false;
         this.mouseDownMiddle = false;
@@ -36,6 +36,25 @@ class Frontend {
         this.scrollPrevent = false;
     }
 
+    static create() {
+        const floatUrl = chrome.extension.getURL('/fg/float.html');
+        const currentUrl = location.href.replace(/[\?#][\w\W]*$/, "");
+        const isNested = (currentUrl === floatUrl);
+
+        let id = null;
+        if (isNested) {
+            const match = /[&?]id=([^&]*?)(?:&|$)/.exec(location.href);
+            if (match !== null) {
+                id = match[1];
+            }
+        }
+
+        const popup = isNested ? new PopupProxy(id) : PopupProxyHost.instance.createPopup();
+        const frontend = new Frontend(popup);
+        frontend.prepare();
+        return frontend;
+    }
+
     async prepare() {
         try {
             this.options = await apiOptionsGet();
@@ -259,9 +278,8 @@ class Frontend {
         const handler = handlers[action];
         if (handler) {
             handler(params);
+            callback();
         }
-
-        callback();
     }
 
     onError(error) {
@@ -281,7 +299,10 @@ class Frontend {
     }
 
     async searchAt(point, type) {
-        if (this.pendingLookup || this.popup.containsPoint(point)) {
+        if (
+            this.pendingLookup ||
+            (this.popup.containsPointIsAsync() ? await this.popup.containsPointAsync(point) : this.popup.containsPoint(point))
+        ) {
             return;
         }
 
@@ -482,5 +503,4 @@ class Frontend {
     }
 }
 
-window.yomichan_frontend = new Frontend();
-window.yomichan_frontend.prepare();
+window.yomichan_frontend = Frontend.create();
diff --git a/ext/fg/js/popup-proxy-host.js b/ext/fg/js/popup-proxy-host.js
new file mode 100644
index 00000000..189481bc
--- /dev/null
+++ b/ext/fg/js/popup-proxy-host.js
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class PopupProxyHost {
+    constructor() {
+        this.popups = {};
+        this.nextId = 0;
+        this.apiReceiver = new FrontendApiReceiver('popup-proxy-host', {
+            createNestedPopup: ({parentId}) => this.createNestedPopup(parentId),
+            show: ({id, elementRect, options}) => this.show(id, elementRect, options),
+            showOrphaned: ({id, elementRect, options}) => this.show(id, elementRect, options),
+            hide: ({id}) => this.hide(id),
+            setVisible: ({id, visible}) => this.setVisible(id, visible),
+            containsPoint: ({id, point}) => this.containsPoint(id, point),
+            termsShow: ({id, elementRect, definitions, options, context}) => this.termsShow(id, elementRect, definitions, options, context),
+            kanjiShow: ({id, elementRect, definitions, options, context}) => this.kanjiShow(id, elementRect, definitions, options, context),
+            clearAutoPlayTimer: ({id}) => this.clearAutoPlayTimer(id)
+        });
+    }
+
+    createPopup(parentId) {
+        const parent = (typeof parentId === 'string' && this.popups.hasOwnProperty(parentId) ? this.popups[parentId] : null);
+        const id = `${this.nextId}`;
+        ++this.nextId;
+        const popup = new Popup(id);
+        if (parent !== null) {
+            popup.parent = parent;
+            parent.children.push(popup);
+        }
+        this.popups[id] = popup;
+        return popup;
+    }
+
+    async createNestedPopup(parentId) {
+        return this.createPopup(parentId).id;
+    }
+
+    getPopup(id) {
+        if (!this.popups.hasOwnProperty(id)) {
+            throw 'Invalid popup ID';
+        }
+
+        return this.popups[id];
+    }
+
+    jsonRectToDOMRect(popup, jsonRect) {
+        let x = jsonRect.x;
+        let y = jsonRect.y;
+        if (popup.parent !== null) {
+            const popupRect = popup.parent.container.getBoundingClientRect();
+            x += popupRect.x;
+            y += popupRect.y;
+        }
+        return new DOMRect(x, y, jsonRect.width, jsonRect.height);
+    }
+
+    async show(id, elementRect, options) {
+        const popup = this.getPopup(id);
+        elementRect = this.jsonRectToDOMRect(popup, elementRect);
+        return await popup.show(elementRect, options);
+    }
+
+    async showOrphaned(id, elementRect, options) {
+        const popup = this.getPopup(id);
+        elementRect = this.jsonRectToDOMRect(popup, elementRect);
+        return await popup.showOrphaned(elementRect, options);
+    }
+
+    async hide(id) {
+        const popup = this.getPopup(id);
+        return popup.hide();
+    }
+
+    async setVisible(id, visible) {
+        const popup = this.getPopup(id);
+        return popup.setVisible(visible);
+    }
+
+    async containsPoint(id, point) {
+        const popup = this.getPopup(id);
+        return popup.containsPointIsAsync() ? await popup.containsPointAsync(point) : popup.containsPoint(point);
+    }
+
+    async termsShow(id, elementRect, definitions, options, context) {
+        const popup = this.getPopup(id);
+        elementRect = this.jsonRectToDOMRect(popup, elementRect);
+        return await popup.termsShow(elementRect, definitions, options, context);
+    }
+
+    async kanjiShow(id, elementRect, definitions, options, context) {
+        const popup = this.getPopup(id);
+        elementRect = this.jsonRectToDOMRect(popup, elementRect);
+        return await popup.kanjiShow(elementRect, definitions, options, context);
+    }
+
+    async clearAutoPlayTimer(id) {
+        const popup = this.getPopup(id);
+        return popup.clearAutoPlayTimer();
+    }
+}
+
+PopupProxyHost.instance = new PopupProxyHost();
diff --git a/ext/fg/js/popup-proxy.js b/ext/fg/js/popup-proxy.js
new file mode 100644
index 00000000..3a15be7d
--- /dev/null
+++ b/ext/fg/js/popup-proxy.js
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+
+class PopupProxy {
+    constructor(parentId) {
+        this.parentId = parentId;
+        this.id = null;
+        this.idPromise = null;
+        this.parent = null;
+        this.children = [];
+
+        this.container = null;
+
+        this.apiSender = new FrontendApiSender();
+    }
+
+    getPopupId() {
+        if (this.idPromise === null) {
+            this.idPromise = this.getPopupIdAsync();
+        }
+        return this.idPromise;
+    }
+
+    async getPopupIdAsync() {
+        const id = await this.invokeHostApi('createNestedPopup', {parentId: this.parentId});
+        this.id = id;
+        return id;
+    }
+
+    async show(elementRect, options) {
+        const id = await this.getPopupId();
+        elementRect = PopupProxy.DOMRectToJson(elementRect);
+        return await this.invokeHostApi('show', {id, elementRect, options});
+    }
+
+    async showOrphaned(elementRect, options) {
+        const id = await this.getPopupId();
+        elementRect = PopupProxy.DOMRectToJson(elementRect);
+        return await this.invokeHostApi('showOrphaned', {id, elementRect, options});
+    }
+
+    async hide() {
+        if (this.id === null) {
+            return;
+        }
+        return await this.invokeHostApi('hide', {id: this.id});
+    }
+
+    async setVisible(visible) {
+        const id = await this.getPopupId();
+        return await this.invokeHostApi('setVisible', {id, visible});
+    }
+
+    containsPoint() {
+        throw 'Non-async function not supported';
+    }
+
+    async containsPointAsync(point) {
+        if (this.id === null) {
+            return false;
+        }
+        return await this.invokeHostApi('containsPoint', {id: this.id, point});
+    }
+
+    containsPointIsAsync() {
+        return true;
+    }
+
+    async termsShow(elementRect, definitions, options, context) {
+        const id = await this.getPopupId();
+        elementRect = PopupProxy.DOMRectToJson(elementRect);
+        return await this.invokeHostApi('termsShow', {id, elementRect, definitions, options, context});
+    }
+
+    async kanjiShow(elementRect, definitions, options, context) {
+        const id = await this.getPopupId();
+        elementRect = PopupProxy.DOMRectToJson(elementRect);
+        return await this.invokeHostApi('kanjiShow', {id, elementRect, definitions, options, context});
+    }
+
+    async clearAutoPlayTimer() {
+        if (this.id === null) {
+            return;
+        }
+        return await this.invokeHostApi('clearAutoPlayTimer', {id: this.id});
+    }
+
+    invokeHostApi(action, params={}) {
+        return this.apiSender.invoke(action, params, 'popup-proxy-host');
+    }
+
+    static DOMRectToJson(domRect) {
+        return {
+            x: domRect.x,
+            y: domRect.y,
+            width: domRect.width,
+            height: domRect.height
+        };
+    }
+}
diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index 86ce575d..f6b4f6d9 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -18,12 +18,15 @@
 
 
 class Popup {
-    constructor() {
+    constructor(id) {
+        this.id = id;
+        this.parent = null;
+        this.children = [];
         this.container = document.createElement('iframe');
         this.container.id = 'yomichan-float';
         this.container.addEventListener('mousedown', e => e.stopPropagation());
         this.container.addEventListener('scroll', e => e.stopPropagation());
-        this.container.setAttribute('src', chrome.extension.getURL('/fg/float.html'));
+        this.container.setAttribute('src', chrome.extension.getURL(`/fg/float.html?id=${id}`));
         this.container.style.width = '0px';
         this.container.style.height = '0px';
         this.injected = null;
@@ -77,6 +80,8 @@ class Popup {
         container.style.width = `${width}px`;
         container.style.height = `${height}px`;
         container.style.visibility = 'visible';
+
+        this.hideChildren();
     }
 
     static getPositionForHorizontalText(elementRect, width, height, maxWidth, maxHeight, optionsGeneral) {
@@ -178,8 +183,34 @@ class Popup {
     }
 
     hide() {
-        this.container.style.visibility = 'hidden';
+        this.hideContainer();
         this.container.blur();
+        this.hideChildren();
+    }
+
+    hideChildren() {
+        if (this.children.length === 0) {
+            return;
+        }
+
+        const targets = this.children.slice(0);
+        while (targets.length > 0) {
+            const target = targets.shift();
+            if (target.isContainerHidden()) { continue; }
+
+            target.hideContainer();
+            for (const child of target.children) {
+                targets.push(child);
+            }
+        }
+    }
+
+    hideContainer() {
+        this.container.style.visibility = 'hidden';
+    }
+
+    isContainerHidden() {
+        return (this.container.style.visibility === 'hidden');
     }
 
     isVisible() {
@@ -209,6 +240,14 @@ class Popup {
         return contained;
     }
 
+    async containsPointAsync(point) {
+        return containsPoint(point);
+    }
+
+    containsPointIsAsync() {
+        return false;
+    }
+
     async termsShow(elementRect, writingMode, definitions, options, context) {
         await this.show(elementRect, writingMode, options);
         this.invokeApi('termsShow', {definitions, options, context});
diff --git a/ext/fg/js/util.js b/ext/fg/js/util.js
index 7518beb5..dc99274e 100644
--- a/ext/fg/js/util.js
+++ b/ext/fg/js/util.js
@@ -24,9 +24,10 @@ function utilAsync(func) {
 }
 
 function utilInvoke(action, params={}) {
+    const data = {action, params};
     return new Promise((resolve, reject) => {
         try {
-            chrome.runtime.sendMessage({action, params}, (response) => {
+            chrome.runtime.sendMessage(data, (response) => {
                 utilCheckLastError(chrome.runtime.lastError);
                 if (response !== null && typeof response === 'object') {
                     if (response.error) {
@@ -35,7 +36,8 @@ function utilInvoke(action, params={}) {
                         resolve(response.result);
                     }
                 } else {
-                    reject(`Unexpected response of type ${typeof response}`);
+                    const message = response === null ? 'Unexpected null response' : `Unexpected response of type ${typeof response}`;
+                    reject(`${message} (${JSON.stringify(data)})`);
                 }
             });
         } catch (e) {