From 86807a54f426bfb86a8885e08227e22efa66e26d Mon Sep 17 00:00:00 2001
From: Martin Rotter <rotter.martinos@gmail.com>
Date: Wed, 10 Jun 2015 07:50:13 +0200
Subject: [PATCH] Initial Google Suggest API implementation.

---
 CMakeLists.txt                    |   6 +-
 resources/text/CHANGELOG          |  12 ++
 src/definitions/definitions.h.in  |   1 +
 src/gui/baselineedit.cpp          |   5 +
 src/gui/baselineedit.h            |   3 +
 src/gui/locationlineedit.cpp      |   5 +-
 src/gui/locationlineedit.h        |   2 +
 src/network-web/googlesuggest.cpp | 203 ++++++++++++++++++++++++++++++
 src/network-web/googlesuggest.h   |  81 ++++++++++++
 9 files changed, 315 insertions(+), 3 deletions(-)
 mode change 100644 => 100755 src/gui/baselineedit.cpp
 mode change 100644 => 100755 src/gui/baselineedit.h
 mode change 100644 => 100755 src/gui/locationlineedit.cpp
 mode change 100644 => 100755 src/gui/locationlineedit.h
 create mode 100755 src/network-web/googlesuggest.cpp
 create mode 100755 src/network-web/googlesuggest.h
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f2a12dcea..5ee953754 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,8 +65,8 @@ project(rssguard)
 
 set(APP_NAME "RSS Guard")
 set(APP_LOW_NAME "rssguard")
-set(APP_VERSION "2.4.0")
-set(FILE_VERSION "2,4,0,0")
+set(APP_VERSION "2.4.1")
+set(FILE_VERSION "2,4,1,0")
 set(APP_AUTHOR "Martin Rotter")
 set(APP_URL "http://bitbucket.org/skunkos/rssguard")
 set(APP_URL_ISSUES "http://bitbucket.org/skunkos/rssguard/issues")
@@ -417,6 +417,7 @@ set(APP_SOURCES
   src/network-web/downloader.cpp
   src/network-web/downloadmanager.cpp
   src/network-web/discoverfeedsbutton.cpp
+  src/network-web/googlesuggest.cpp
 
   # MAIN sources.
   src/main.cpp
@@ -503,6 +504,7 @@ set(APP_HEADERS
   src/network-web/downloader.h
   src/network-web/downloadmanager.h
   src/network-web/discoverfeedsbutton.h
+  src/network-web/googlesuggest.h
 )
 
 # APP form files.
diff --git a/resources/text/CHANGELOG b/resources/text/CHANGELOG
index 117b1be7b..dec73ab4c 100644
--- a/resources/text/CHANGELOG
+++ b/resources/text/CHANGELOG
@@ -1,4 +1,16 @@
 <body>
+<center><h2>2.4.1</h2></center>
+Added:
+<ul>
+<li><b>Added support for Google auto-suggest API.</b> Just type your phrase in internal web browser location text box and Google will help you out.</li>
+</ul>
+
+Fixed:
+<ul>
+<li></li>
+</ul>
+
+<hr/>
 <center><h2>2.4.0</h2></center>
 Added:
 <ul>
diff --git a/src/definitions/definitions.h.in b/src/definitions/definitions.h.in
index c0895794c..28336dfc6 100755
--- a/src/definitions/definitions.h.in
+++ b/src/definitions/definitions.h.in
@@ -83,6 +83,7 @@
 #define MIME_TYPE_ITEM_POINTER                "@APP_LOW_NAME@/itempointer"
 #define DOWNLOADER_ICON_SIZE                  48
 #define GOOGLE_SEARCH_URL                     "https://www.google.com/search?q=%1&ie=utf-8&oe=utf-8"
+#define GOOGLE_SUGGEST_URL                    "http://suggestqueries.google.com/complete/search?output=toolbar&hl=en&q=%1"
 
 #define FEED_INITIAL_OPML_PATTERN             "feeds-%1.opml"
 
diff --git a/src/gui/baselineedit.cpp b/src/gui/baselineedit.cpp
old mode 100644
new mode 100755
index ad42a3851..76f7a65f5
--- a/src/gui/baselineedit.cpp
+++ b/src/gui/baselineedit.cpp
@@ -26,6 +26,11 @@ BaseLineEdit::BaseLineEdit(QWidget *parent) : QLineEdit(parent) {
 BaseLineEdit::~BaseLineEdit() {
 }
 
+void BaseLineEdit::submit(const QString &text) {
+  setText(text);
+  emit submitted(text);
+}
+
 void BaseLineEdit::keyPressEvent(QKeyEvent *event) {
   if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {
     emit submitted(text());
diff --git a/src/gui/baselineedit.h b/src/gui/baselineedit.h
old mode 100644
new mode 100755
index 312aa223c..743369508
--- a/src/gui/baselineedit.h
+++ b/src/gui/baselineedit.h
@@ -29,6 +29,9 @@ class BaseLineEdit : public QLineEdit {
     explicit BaseLineEdit(QWidget *parent = 0);
     virtual ~BaseLineEdit();
 
+  public slots:
+    void submit(const QString &text);
+
   protected:
     void keyPressEvent(QKeyEvent *event);
 
diff --git a/src/gui/locationlineedit.cpp b/src/gui/locationlineedit.cpp
old mode 100644
new mode 100755
index 149ceadef..ffa9311bc
--- a/src/gui/locationlineedit.cpp
+++ b/src/gui/locationlineedit.cpp
@@ -17,15 +17,18 @@
 
 #include "gui/locationlineedit.h"
 
+#include "network-web/googlesuggest.h"
+
 #include <QMouseEvent>
 
 
 LocationLineEdit::LocationLineEdit(QWidget *parent)
-  : BaseLineEdit(parent), m_mouseSelectsAllText(true) {
+  : BaseLineEdit(parent), m_mouseSelectsAllText(true), m_googleSuggest(new GoogleSuggest(this)) {
   setPlaceholderText(tr("Website address goes here"));
 }
 
 LocationLineEdit::~LocationLineEdit() {
+
 }
 
 void LocationLineEdit::focusOutEvent(QFocusEvent *event) {
diff --git a/src/gui/locationlineedit.h b/src/gui/locationlineedit.h
old mode 100644
new mode 100755
index 9bb8e03aa..57b24c7ac
--- a/src/gui/locationlineedit.h
+++ b/src/gui/locationlineedit.h
@@ -22,6 +22,7 @@
 
 
 class WebBrowser;
+class GoogleSuggest;
 
 class LocationLineEdit : public BaseLineEdit {
     Q_OBJECT
@@ -37,6 +38,7 @@ class LocationLineEdit : public BaseLineEdit {
 
   private:
     bool m_mouseSelectsAllText;
+    GoogleSuggest *m_googleSuggest;
 };
 
 #endif // LOCATIONLINEEDIT_H
diff --git a/src/network-web/googlesuggest.cpp b/src/network-web/googlesuggest.cpp
new file mode 100755
index 000000000..fc6fb61e5
--- /dev/null
+++ b/src/network-web/googlesuggest.cpp
@@ -0,0 +1,203 @@
+// This file is part of RSS Guard.
+//
+// Copyright (C) 2011-2015 by Martin Rotter <rotter.martinos@gmail.com>
+//
+// RSS Guard 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.
+//
+// RSS Guard 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 RSS Guard. If not, see <http://www.gnu.org/licenses/>.
+
+// You may use this file under the terms of the BSD license as follows:
+//
+// "Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//   * Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in
+//     the documentation and/or other materials provided with the
+//     distribution.
+//   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+//     of its contributors may be used to endorse or promote products derived
+//     from this software without specific prior written permission.
+//
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+
+#include "network-web/googlesuggest.h"
+
+#include "definitions/definitions.h"
+#include "network-web/webbrowsernetworkaccessmanager.h"
+#include "gui/locationlineedit.h"
+
+#include <QListWidget>
+#include <QXmlStreamReader>
+#include <QTimer>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QKeyEvent>
+#include <QDomDocument>
+#include <QTextCodec>
+
+
+GoogleSuggest::GoogleSuggest(LocationLineEdit *editor, QObject *parent) : QObject(parent), editor(editor) {
+  popup = new QListWidget();
+  popup->setWindowFlags(Qt::Popup);
+  popup->setFocusPolicy(Qt::NoFocus);
+  popup->setFocusProxy(editor);
+  popup->setMouseTracking(true);
+  popup->setSelectionBehavior(QAbstractItemView::SelectRows);
+  popup->setFrameStyle(QFrame::Box | QFrame::Plain);
+  popup->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+  popup->installEventFilter(this);
+
+  timer = new QTimer(this);
+  timer->setSingleShot(true);
+  timer->setInterval(500);
+
+  connect(popup, SIGNAL(itemClicked(QListWidgetItem*)), SLOT(doneCompletion()));
+  connect(timer, SIGNAL(timeout()), SLOT(autoSuggest()));
+  connect(editor, SIGNAL(textEdited(QString)), timer, SLOT(start()));
+}
+
+GoogleSuggest::~GoogleSuggest() {
+  delete popup;
+}
+
+bool GoogleSuggest::eventFilter(QObject *object, QEvent *event) {
+  if (object != popup) {
+    return false;
+  }
+
+  if (event->type() == QEvent::MouseButtonPress) {
+    popup->hide();
+    editor->setFocus();
+    return true;
+  }
+
+  if (event->type() == QEvent::KeyPress) {
+    bool consumed = false;
+    int key = static_cast<QKeyEvent*>(event)->key();
+
+    switch (key) {
+      case Qt::Key_Enter:
+      case Qt::Key_Return:
+        doneCompletion();
+        consumed = true;
+
+      case Qt::Key_Escape:
+        editor->setFocus();
+        popup->hide();
+        consumed = true;
+
+      case Qt::Key_Up:
+      case Qt::Key_Down:
+      case Qt::Key_Home:
+      case Qt::Key_End:
+      case Qt::Key_PageUp:
+      case Qt::Key_PageDown:
+        break;
+
+      default:
+        editor->setFocus();
+        editor->event(event);
+        popup->hide();
+        break;
+    }
+
+    return consumed;
+  }
+
+  return false;
+}
+
+void GoogleSuggest::showCompletion(const QStringList &choices) {
+  if (choices.isEmpty()) {
+    return;
+  }
+
+  popup->setUpdatesEnabled(false);
+  popup->clear();
+
+  foreach (const QString &choice, choices) {
+    new QListWidgetItem(choice, popup);
+  }
+
+  popup->setCurrentItem(popup->item(0));
+  popup->adjustSize();
+  popup->setUpdatesEnabled(true);
+  popup->resize(editor->width(), popup->sizeHintForRow(0) * qMin(7, choices.count()) + 3);
+  popup->move(editor->mapToGlobal(QPoint(0, editor->height())));
+  popup->setFocus();
+  popup->show();
+}
+
+void GoogleSuggest::doneCompletion() {
+  timer->stop();
+  popup->hide();
+  editor->setFocus();
+
+  QListWidgetItem *item = popup->currentItem();
+
+  if (item != NULL) {
+    editor->submit(QString(GOOGLE_SEARCH_URL).arg(item->text()));
+  }
+}
+
+void GoogleSuggest::preventSuggest() {
+  timer->stop();
+}
+
+void GoogleSuggest::autoSuggest() {
+  QString str = QUrl::toPercentEncoding(editor->text());
+  QString url = QString(GOOGLE_SUGGEST_URL).arg(str);
+
+  connect(WebBrowserNetworkAccessManager::instance()->get(QNetworkRequest(QString(url))), SIGNAL(finished()),
+          this, SLOT(handleNetworkData()));
+}
+
+void GoogleSuggest::handleNetworkData() {
+  QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
+
+  if (!reply->error()) {
+    QStringList choices;
+    QDomDocument xml;
+    QByteArray response = reply->readAll();
+
+    QTextCodec *c = QTextCodec::codecForUtfText(response);
+    xml.setContent(c->toUnicode(response));
+
+    QDomNodeList suggestions = xml.elementsByTagName("suggestion");
+
+    for (int i = 0; i < suggestions.size(); i++) {
+      QDomElement element = suggestions.at(i).toElement();
+
+      if (element.attributes().contains("data")) {
+        choices.append(element.attribute("data"));
+      }
+    }
+
+    showCompletion(choices);
+  }
+
+  reply->deleteLater();
+}
diff --git a/src/network-web/googlesuggest.h b/src/network-web/googlesuggest.h
new file mode 100755
index 000000000..cd63de156
--- /dev/null
+++ b/src/network-web/googlesuggest.h
@@ -0,0 +1,81 @@
+// This file is part of RSS Guard.
+//
+// Copyright (C) 2011-2015 by Martin Rotter <rotter.martinos@gmail.com>
+//
+// RSS Guard 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.
+//
+// RSS Guard 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 RSS Guard. If not, see <http://www.gnu.org/licenses/>.
+
+// You may use this file under the terms of the BSD license as follows:
+//
+// "Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//   * Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in
+//     the documentation and/or other materials provided with the
+//     distribution.
+//   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+//     of its contributors may be used to endorse or promote products derived
+//     from this software without specific prior written permission.
+//
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+
+#ifndef GOOGLESUGGEST_H
+#define GOOGLESUGGEST_H
+
+#include <QObject>
+
+
+class LocationLineEdit;
+class QNetworkReply;
+class QTimer;
+class QListWidget;
+class QNetworkAccessManager;
+
+class GoogleSuggest : public QObject {
+    Q_OBJECT
+
+  public:
+    // Constructors.
+    explicit GoogleSuggest(LocationLineEdit *editor, QObject *parent = 0);
+    virtual ~GoogleSuggest();
+
+    bool eventFilter(QObject *object, QEvent *event);
+    void showCompletion(const QStringList &choices);
+
+  public slots:
+    void doneCompletion();
+    void preventSuggest();
+    void autoSuggest();
+    void handleNetworkData();
+
+  private:
+    LocationLineEdit *editor;
+    QListWidget *popup;
+    QTimer *timer;
+};
+
+#endif // GOOGLESUGGEST_H
