From 9acce79ce28a022c7dad4fe59f731fac16e90cd0 Mon Sep 17 00:00:00 2001
From: Karsten Heimrich <karsten.heimrich@qt.io>
Date: Fri, 2 Sep 2016 11:50:13 +0200
Subject: Implement basic Qt Help System support

Change-Id: Ibf3b3fc46f66f4cf017c573fa3728c5bc8417687
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
---
 src/qtprojectlib/VersionInformation.cs      |  10 +
 src/qtvstools/QtHelpLinkChooser.xaml        | 107 ++++++++++
 src/qtvstools/QtHelpLinkChooser.xaml.cs     |  98 ++++++++++
 src/qtvstools/QtHelpMenu.cs                 | 289 ++++++++++++++++++++++++++++
 src/qtvstools/QtMenus.vsct                  |  66 +++++++
 src/qtvstools/QtVsTools.csproj              |  49 ++++-
 src/qtvstools/Vsix.cs                       |   1 +
 src/qtvstools/packages.config               |   4 +
 src/qtvstools/source.extension.vsixmanifest |  10 +-
 9 files changed, 626 insertions(+), 8 deletions(-)
 create mode 100644 src/qtvstools/QtHelpLinkChooser.xaml
 create mode 100644 src/qtvstools/QtHelpLinkChooser.xaml.cs
 create mode 100644 src/qtvstools/QtHelpMenu.cs
 create mode 100644 src/qtvstools/packages.config

diff --git a/src/qtprojectlib/VersionInformation.cs b/src/qtprojectlib/VersionInformation.cs
index ac3e3af9..bbc4689a 100644
--- a/src/qtprojectlib/VersionInformation.cs
+++ b/src/qtprojectlib/VersionInformation.cs
@@ -100,6 +100,16 @@ namespace QtProjectLib
             } catch (Exception /*e*/) {
                 qtDir = null;
             }
+
+            try {
+                var qmakeQuery = new QMakeQuery(this);
+                QtInstallDocs = qmakeQuery.query("QT_INSTALL_DOCS");
+            } catch { }
+        }
+
+        public string QtInstallDocs
+        {
+            get; private set;
         }
 
         public bool IsStaticBuild()
diff --git a/src/qtvstools/QtHelpLinkChooser.xaml b/src/qtvstools/QtHelpLinkChooser.xaml
new file mode 100644
index 00000000..18d9471f
--- /dev/null
+++ b/src/qtvstools/QtHelpLinkChooser.xaml
@@ -0,0 +1,107 @@
+<!--
+    *****************************************************************************
+    **
+    ** Copyright (C) 2016 The Qt Company Ltd.
+    ** Contact: https://www.qt.io/licensing/
+    **
+    ** This file is part of the Qt VS Tools.
+    **
+    ** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+    ** Commercial License Usage
+    ** Licensees holding valid commercial Qt licenses may use this file in
+    ** accordance with the commercial license agreement provided with the
+    ** Software or, alternatively, in accordance with the terms contained in
+    ** a written agreement between you and The Qt Company. For licensing terms
+    ** and conditions see https://www.qt.io/terms-conditions. For further
+    ** information use the contact form at https://www.qt.io/contact-us.
+    **
+    ** GNU General Public License Usage
+    ** Alternatively, this file may be used under the terms of the GNU
+    ** General Public License version 3 as published by the Free Software
+    ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+    ** included in the packaging of this file. Please review the following
+    ** information to ensure the GNU General Public License requirements will
+    ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+    **
+    ** $QT_END_LICENSE$
+    **
+    *****************************************************************************
+-->
+
+<local:VsToolsDialogWindow x:Class="QtVsTools.QtHelpLinkChooser"
+                           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                           xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+                           xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+                           xmlns:local="clr-namespace:QtVsTools"
+                           Width="400"
+                           Height="250"
+                           MinWidth="400"
+                           MinHeight="250"
+                           mc:Ignorable="d"
+                           Title="Choose Topic"
+                           ShowInTaskbar="False"
+                           HasHelpButton="False"
+                           HasMinimizeButton="False"
+                           ResizeMode="CanResizeWithGrip"
+                           WindowStartupLocation="CenterOwner">
+    <local:VsToolsDialogWindow.Resources>
+        <BooleanToVisibilityConverter x:Key="b2v" />
+        <Style x:Key="ListBoxDoubleClickStyle"
+               TargetType="ListBoxItem">
+            <EventSetter Event="MouseDoubleClick"
+                         Handler="OnListBoxItem_DoubleClick" />
+        </Style>
+    </local:VsToolsDialogWindow.Resources>
+    <Grid Margin="10"
+          FocusManager.FocusedElement="{Binding ElementName=searchBox}">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+        <TextBlock Grid.Row="0"
+                   Margin="0,0,0,5">
+            <Run Text="Choose a topic for " />
+            <Run FontWeight="Bold"
+                 Text="{Binding Path=Keyword}" />
+            <Run Text=":" />
+        </TextBlock>
+        <Grid Grid.Row="1"
+              MinHeight="22"
+              Background="White">
+            <TextBlock Text=" Filter..."
+                       Foreground="LightSteelBlue"
+                       VerticalAlignment="Center"
+                       Visibility="{Binding ElementName=searchBox,
+                                    Path=Text.IsEmpty, Converter={StaticResource b2v}}" />
+            <TextBox Name="searchBox"
+                     Background="Transparent"
+                     TextChanged="OnSearchBox_TextChanged"
+                     VerticalContentAlignment="Center" />
+        </Grid>
+        <ListBox Grid.Row="2"
+                 Margin="0,10,0,0"
+                 Name="linkListBox"
+                 DisplayMemberPath="Key"
+                 SelectedValuePath="Value"
+                 ItemsSource="{Binding Path=Links}"
+                 SelectedValue="{Binding Path=Link}"
+                 SelectionChanged="OnLinkListBox_SelectionChanged"
+                 ItemContainerStyle="{StaticResource ListBoxDoubleClickStyle}" />
+        <StackPanel Grid.Row="3"
+                    Orientation="Horizontal"
+                    HorizontalAlignment="Right">
+            <Button MinWidth="75"
+                    Content="Show"
+                    IsDefault="True"
+                    Click="OnShowButton_Click"
+                    Margin="0,10,10,0" />
+            <Button MinWidth="75"
+                    IsCancel="True"
+                    Content="Cancel"
+                    Margin="0,10,0,0" />
+        </StackPanel>
+    </Grid>
+</local:VsToolsDialogWindow>
diff --git a/src/qtvstools/QtHelpLinkChooser.xaml.cs b/src/qtvstools/QtHelpLinkChooser.xaml.cs
new file mode 100644
index 00000000..83775e6d
--- /dev/null
+++ b/src/qtvstools/QtHelpLinkChooser.xaml.cs
@@ -0,0 +1,98 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt VS Tools.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Input;
+
+namespace QtVsTools
+{
+    public class VsToolsDialogWindow : Microsoft.VisualStudio.PlatformUI.DialogWindow
+    {
+        // Workaround to avoid referencing Microsoft.VisualStudio.Shell.14.0 in XAML.
+    }
+
+    partial class QtHelpLinkChooser : VsToolsDialogWindow
+    {
+        public QtHelpLinkChooser()
+        {
+            InitializeComponent();
+
+            DataContext = this;
+            Loaded += OnLoaded;
+        }
+
+        public string Link { get; private set; }
+        public string Keyword { private get; set; }
+        public Dictionary<string, string> Links { private get; set; }
+
+        private void OnLoaded(object sender, RoutedEventArgs e)
+        {
+            var view = CollectionViewSource.GetDefaultView(linkListBox.ItemsSource);
+            view.Filter = (obj) =>
+            {
+                if (string.IsNullOrEmpty(searchBox.Text))
+                    return true;
+
+                var item = (KeyValuePair<string, string>) obj;
+                return item.Key.IndexOf(searchBox.Text, StringComparison.OrdinalIgnoreCase) >= 0;
+            };
+            linkListBox.SelectedIndex = 0;
+        }
+
+        private void OnSearchBox_TextChanged(object sender, TextChangedEventArgs e)
+        {
+            CollectionViewSource.GetDefaultView(linkListBox.ItemsSource).Refresh();
+            if (linkListBox.Items.Count == 1 || linkListBox.SelectedItem == null)
+                linkListBox.SelectedIndex = 0;
+        }
+
+        private void OnListBoxItem_DoubleClick(object sender, MouseButtonEventArgs e)
+        {
+            if (e.LeftButton == MouseButtonState.Pressed)
+                OnShowButton_Click(sender, null);
+        }
+
+        private void OnShowButton_Click(object sender, System.Windows.RoutedEventArgs e)
+        {
+            DialogResult = true;
+            Close();
+        }
+
+        private void OnLinkListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (e.RemovedItems != null && (e.AddedItems == null || e.AddedItems.Count == 0)) {
+                if (linkListBox.Items.Count != 0)
+                    linkListBox.SelectedIndex = 0;
+            }
+        }
+    }
+}
diff --git a/src/qtvstools/QtHelpMenu.cs b/src/qtvstools/QtHelpMenu.cs
new file mode 100644
index 00000000..50a68e62
--- /dev/null
+++ b/src/qtvstools/QtHelpMenu.cs
@@ -0,0 +1,289 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt VS Tools.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+using EnvDTE;
+using Microsoft.VisualStudio.Settings;
+using Microsoft.VisualStudio.Shell;
+using Microsoft.VisualStudio.Shell.Interop;
+using Microsoft.VisualStudio.Shell.Settings;
+using QtProjectLib;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Design;
+using System.Data.Common;
+using System.Data.SQLite;
+using System.IO;
+using System.Linq;
+
+namespace QtVsTools
+{
+    internal sealed class QtHelpMenu
+    {
+        public static QtHelpMenu Instance
+        {
+            get;
+            private set;
+        }
+
+        public static void Initialize(Package package)
+        {
+            Instance = new QtHelpMenu(package);
+        }
+
+        const int F1QtHelpId = 0x0100;
+        const int ViewQtHelpId = 0x0101;
+        const int OnlineDocumentationId = 0x0102;
+        const int OfflineDocumentationId = 0x0103;
+
+        readonly Package package;
+        const string QtVsToolsHelpPreferencePath = @"QtVsTools\Help\Preference";
+        static readonly Guid HelpMenuGroupGuid = new Guid("fc6244f9-ec84-4370-a59c-b009b2eafd1b");
+
+        QtHelpMenu(Package pkg)
+        {
+            if (pkg == null)
+                throw new ArgumentNullException("package");
+            package = pkg;
+
+            var commandService = ServiceProvider.GetService(typeof(IMenuCommandService))
+                as OleMenuCommandService;
+
+            if (commandService == null)
+                return;
+
+            var menuCommandID = new CommandID(HelpMenuGroupGuid, F1QtHelpId);
+            commandService.AddCommand(new MenuCommand(F1QtHelpCallback, menuCommandID));
+
+            menuCommandID = new CommandID(HelpMenuGroupGuid, ViewQtHelpId);
+            commandService.AddCommand(new MenuCommand(ViewQtHelpCallback, menuCommandID));
+
+            var command = new OleMenuCommand(ExecHandler, new CommandID(HelpMenuGroupGuid,
+                OfflineDocumentationId));
+            command.BeforeQueryStatus += BeforeQueryStatus;
+            commandService.AddCommand(command);
+
+            command = new OleMenuCommand(ExecHandler, new CommandID(HelpMenuGroupGuid,
+                OnlineDocumentationId));
+            command.BeforeQueryStatus += BeforeQueryStatus;
+            commandService.AddCommand(command);
+        }
+
+        IServiceProvider ServiceProvider
+        {
+            get { return package; }
+        }
+
+        static bool IsSuperfluousCharacter(string text)
+        {
+            switch (text) {
+                case " ": case ";": case ".": case "<": case ">": case "{": case "}":
+                case "(": case ")": case ":": case ",": case "/": case "\\": case "^":
+                case "%": case "+": case "-": case "*": case "\t": case "&": case "\"":
+                case "!": case "[": case "]": case "|": case "'": case "~": case "#": case "=":
+                return true; // nothing we are interested in
+            }
+            return false;
+        }
+
+        static string GetString(DbDataReader reader, int index)
+        {
+            if (!reader.IsDBNull(index))
+                return reader.GetString(index);
+            return string.Empty;
+        }
+
+        void ViewQtHelpCallback(object sender, EventArgs args)
+        {
+            VsShellUtilities.OpenSystemBrowser("https://www.qt.io/developers");
+        }
+
+        async void F1QtHelpCallback(object sender, EventArgs args)
+        {
+            try {
+                var dte = ServiceProvider.GetService(typeof(SDTE)) as DTE;
+                var objTextDocument = dte.ActiveDocument.Object() as TextDocument;
+
+                var keyword = string.Empty;
+                var selection = objTextDocument.Selection as TextSelection;
+                if (selection.IsEmpty) { // no selection inside the document
+                    var line = selection.ActivePoint.Line; // current line
+                    var offset = selection.ActivePoint.LineCharOffset; // current char offset
+
+                    selection.CharLeft(true); // try the character before the cursor
+                    if (!selection.IsEmpty) {
+                        keyword = selection.Text; // something in front of the cursor
+                        selection.CharRight(true); // reset to origin
+                        if (!IsSuperfluousCharacter(keyword)) {
+                            // move the selection to the start of the word
+                            selection.WordLeft(true);
+                            selection.MoveToPoint(selection.TopPoint);
+                        }
+                    }
+                    selection.WordRight(true);  // select the word
+                    keyword = selection.Text;  // get the selected text
+                    selection.MoveToLineAndOffset(line, offset); // reset
+                } else {
+                    keyword = selection.Text;
+                }
+
+                keyword = keyword.Trim();
+                if (keyword.Length <= 1 || IsSuperfluousCharacter(keyword))
+                    return; // suppress single character, operators etc...
+
+                var qtVersion = "$(DefaultQtVersion)";
+                var project = HelperFunctions.GetSelectedQtProject(dte);
+                if (project == null) {
+                    project = HelperFunctions.GetSelectedProject(dte);
+                    if (project != null && HelperFunctions.IsQMakeProject(project)) {
+                        var qmakeQtDir = HelperFunctions.GetQtDirFromQMakeProject(project);
+                        qtVersion = QtVersionManager.The().GetQtVersionFromInstallDir(qmakeQtDir);
+                    }
+                } else {
+                    qtVersion = QtVersionManager.The().GetProjectQtVersion(project);
+                }
+
+                var docPath = QtVersionManager.The().GetVersionInfo(qtVersion).QtInstallDocs;
+                if (string.IsNullOrEmpty(docPath) || !Directory.Exists(docPath))
+                    return;
+
+                var qchFiles = Directory.GetFiles(docPath, "*?.qch");
+                if (qchFiles.Length == 0)
+                    return;
+
+                var settingsManager = new ShellSettingsManager(QtHelpMenu.Instance.ServiceProvider);
+                var store = settingsManager.GetReadOnlySettingsStore(SettingsScope.UserSettings);
+                var offline = store.GetBoolean(QtVsToolsHelpPreferencePath, "Offline", true);
+
+                var linksForKeyword = string.Format("SELECT d.Title, f.Name, e.Name, "
+                    + "d.Name, a.Anchor FROM IndexTable a, FileNameTable d, FolderTable e, "
+                    + "NamespaceTable f WHERE a.FileId=d.FileId AND d.FolderId=e.Id AND "
+                    + "a.NamespaceId=f.Id AND a.Name='{0}'", keyword);
+
+                var links = new Dictionary<string, string>();
+                var builder = new SQLiteConnectionStringBuilder
+                {
+                    ReadOnly = true
+                };
+                foreach (var file in qchFiles) {
+                    builder.DataSource = file;
+                    using (var connection = new SQLiteConnection(builder.ToString())) {
+                        connection.Open();
+                        using (var command = new SQLiteCommand(linksForKeyword, connection)) {
+                            using (var reader = await command.ExecuteReaderAsync()) {
+                                while (reader.Read()) {
+                                    var title = GetString(reader, 0);
+                                    if (string.IsNullOrWhiteSpace(title))
+                                        title = keyword + ':' + GetString(reader, 3);
+                                    var path = string.Empty;
+                                    if (offline) {
+                                        path = "file:///" + Path.Combine(docPath,
+                                            GetString(reader, 2), GetString(reader, 3));
+                                    } else {
+                                        path = "https://" + Path.Combine("doc.qt.io", "qt-5",
+                                            GetString(reader, 3));
+                                    }
+                                    if (!string.IsNullOrWhiteSpace(GetString(reader, 4)))
+                                        path += "#" + GetString(reader, 4);
+                                    links.Add(title, path);
+                                }
+                            }
+                        }
+                    }
+                }
+
+                var uri = string.Empty;
+                switch (links.Values.Count) {
+                case 0:
+                    if (!offline) {
+                        uri = new UriBuilder("http://doc.qt.io/qt-5/search-results.html")
+                        {
+                            Query = "q=" + keyword
+                        }.ToString();
+                    }
+                    break;
+                case 1:
+                    uri = links.First().Value;
+                    break;
+                default:
+                    var dialog = new QtHelpLinkChooser
+                    {
+                        Links = links,
+                        Keyword = keyword,
+                        ShowInTaskbar = false
+                    };
+                    if (!dialog.ShowModal().GetValueOrDefault())
+                        return;
+                    uri = dialog.Link;
+                    break;
+                }
+
+                if (string.IsNullOrEmpty(uri)) { // offline mode without a single search hit
+                    VsShellUtilities.ShowMessageBox(QtHelpMenu.Instance.ServiceProvider,
+                        "Your search - " + keyword + " - did not match any documents.",
+                        string.Empty, OLEMSGICON.OLEMSGICON_INFO, OLEMSGBUTTON.OLEMSGBUTTON_OK,
+                        OLEMSGDEFBUTTON.OLEMSGDEFBUTTON_FIRST);
+                } else {
+                    VsShellUtilities.OpenSystemBrowser(HelperFunctions.ChangePathFormat(uri));
+                }
+            } catch { }
+        }
+
+        void ExecHandler(object sender, EventArgs e)
+        {
+            var command = sender as OleMenuCommand;
+            if (command == null)
+                return;
+
+            var settingsManager = new ShellSettingsManager(ServiceProvider);
+            var store = settingsManager.GetWritableSettingsStore(SettingsScope.UserSettings);
+            store.CreateCollection(QtVsToolsHelpPreferencePath);
+
+            var value = command.CommandID.ID == OfflineDocumentationId;
+            store.SetBoolean(QtVsToolsHelpPreferencePath, "Offline", value);
+        }
+
+        void BeforeQueryStatus(object sender, EventArgs e)
+        {
+            var command = sender as OleMenuCommand;
+            if (command == null)
+                return;
+
+            var settingsManager = new ShellSettingsManager(ServiceProvider);
+            var store = settingsManager.GetReadOnlySettingsStore(SettingsScope.UserSettings);
+
+            switch (command.CommandID.ID) {
+            case OnlineDocumentationId:
+                command.Checked = !store.GetBoolean(QtVsToolsHelpPreferencePath, "Offline", true);
+                break;
+            case OfflineDocumentationId:
+                command.Checked = store.GetBoolean(QtVsToolsHelpPreferencePath, "Offline", true);
+                break;
+            }
+        }
+    }
+}
diff --git a/src/qtvstools/QtMenus.vsct b/src/qtvstools/QtMenus.vsct
index 8d45c82d..8857c474 100644
--- a/src/qtvstools/QtMenus.vsct
+++ b/src/qtvstools/QtMenus.vsct
@@ -55,6 +55,9 @@
     <!-- This header contains the command ids for the menus provided by the shell. -->
     <Extern href="vsshlids.h"/>
 
+    <!--  Include the definitions for images included in the VS image catalog -->
+    <Include href="KnownImageIds.vsct"/>
+
     <!--
         The Commands section is where commands, menus, and menu groups are defined.
         This section uses a Guid to identify the package that provides the command defined inside it.
@@ -76,6 +79,13 @@
                     <ButtonText>Qt VS Tools</ButtonText>
                 </Strings>
             </Menu>
+
+            <Menu guid="HelpMenuGroupGuid" id="HelpMenuSubMenuId" priority="0x0700" type="Menu">
+                <Parent guid="HelpMenuGroupGuid" id="HelpMenuGroupId" />
+                <Strings>
+                    <ButtonText>Set Qt Help Preference</ButtonText>
+                </Strings>
+            </Menu>
         </Menus>
 
         <!--
@@ -139,6 +149,14 @@
                 <Parent guid="guidSHLMainMenu" id="IDM_VS_CTXT_ITEMNODE" />
             </Group>
 
+            <Group guid="HelpMenuGroupGuid" id="HelpMenuGroupId" priority="0x0600">
+                <Parent guid="guidSHLMainMenu" id="IDM_VS_MENU_HELP"/>
+            </Group>
+
+            <Group guid="HelpMenuGroupGuid" id="HelpMenuSubGroupId" priority="0x0600">
+                <Parent guid="HelpMenuGroupGuid" id="HelpMenuSubMenuId"/>
+            </Group>
+
         </Groups>
 
         <!--
@@ -431,6 +449,38 @@
 
             <!-- Endregion Item context menu buttons -->
 
+            <Button guid="HelpMenuGroupGuid" id="F1QtHelpId" priority="0x0100" type="Button">
+                <Parent guid="HelpMenuGroupGuid" id="HelpMenuGroupId" />
+                <CommandFlag>DefaultInvisible</CommandFlag>
+                <Strings>
+                    <ButtonText>F1 Qt Help</ButtonText>
+                </Strings>
+            </Button>
+
+            <Button guid="HelpMenuGroupGuid" id="ViewQtHelpId" priority="0x0100" type="Button">
+                <Parent guid="HelpMenuGroupGuid" id="HelpMenuGroupId" />
+                <Icon guid="MenuImages" id="QtLogoBitmap" />
+                <Strings>
+                    <ButtonText>View Qt Help</ButtonText>
+                </Strings>
+            </Button>
+
+            <Button guid="HelpMenuGroupGuid" id="OnlineDocumentationId" priority="0x0100" type="Button">
+                <Parent guid="HelpMenuGroupGuid" id="HelpMenuSubGroupId" />
+                <CommandFlag>DefaultDisabled</CommandFlag>
+                <Strings>
+                    <ButtonText>Use Online Documentation</ButtonText>
+                </Strings>
+            </Button>
+
+            <Button guid="HelpMenuGroupGuid" id="OfflineDocumentationId" priority="0x0100" type="Button">
+                <Parent guid="HelpMenuGroupGuid" id="HelpMenuSubGroupId" />
+                <CommandFlag>DefaultDisabled</CommandFlag>
+                <Strings>
+                    <ButtonText>Use Offline Documentation</ButtonText>
+                </Strings>
+            </Button>
+
         </Buttons>
 
         <!-- The bitmaps section is used to define the bitmaps that are used for the commands. -->
@@ -534,6 +584,18 @@
 
         </GuidSymbol>
 
+        <GuidSymbol name="HelpMenuGroupGuid" value="{fc6244f9-ec84-4370-a59c-b009b2eafd1b}">
+
+            <IDSymbol name="HelpMenuGroupId" value="0x1040" />
+            <IDSymbol name="HelpMenuSubMenuId" value="0x1050" />
+            <IDSymbol name="HelpMenuSubGroupId" value="0x1060" />
+            <IDSymbol name="F1QtHelpId" value="0x0100" />
+            <IDSymbol name="ViewQtHelpId" value="0x0101" />
+            <IDSymbol name="OnlineDocumentationId" value="0x0102" />
+            <IDSymbol name="OfflineDocumentationId" value="0x0103" />
+
+        </GuidSymbol>
+
         <GuidSymbol name="MenuImages" value="{d7cf9f1c-0f37-4609-8eb3-72589dc5a5ec}" >
             <IDSymbol name="LaunchDesignerBitmap" value="1" />
             <IDSymbol name="LaunchLinguistBitmap" value="2" />
@@ -560,4 +622,8 @@
         <VisibilityItem guid="SolutionContextMenuGuid" id="ChangeSolutionQtVersionId"
             context="UICONTEXT_SolutionHasMultipleProjects" />
     </VisibilityConstraints>
+
+    <KeyBindings>
+        <KeyBinding guid="HelpMenuGroupGuid" id="F1QtHelpId" key1="VK_F1" mod1="ALT" editor="guidVSStd97" />
+    </KeyBindings>
 </CommandTable>
diff --git a/src/qtvstools/QtVsTools.csproj b/src/qtvstools/QtVsTools.csproj
index 1df4b66f..7f2ccd69 100644
--- a/src/qtvstools/QtVsTools.csproj
+++ b/src/qtvstools/QtVsTools.csproj
@@ -45,14 +45,15 @@
     <RunCodeAnalysis>true</RunCodeAnalysis>
   </PropertyGroup>
   <ItemGroup>
-    <Compile Include="DefaultEditorsHandler.cs" />
-    <Compile Include="DteEventsHandler.cs" />
     <Compile Include="AddQtVersionDialog.cs">
       <SubType>Form</SubType>
     </Compile>
     <Compile Include="AddTranslationDialog.cs">
       <SubType>Form</SubType>
     </Compile>
+    <Compile Include="DefaultEditorsClient.cs" />
+    <Compile Include="DefaultEditorsHandler.cs" />
+    <Compile Include="DteEventsHandler.cs" />
     <Compile Include="ExtLoader.cs" />
     <Compile Include="FormChangeQtVersion.cs">
       <SubType>Form</SubType>
@@ -75,6 +76,10 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="QMakeWrapper.cs" />
     <Compile Include="QtDefaultEditorsHelper.cs" />
+    <Compile Include="QtHelpLinkChooser.xaml.cs">
+      <DependentUpon>QtHelpLinkChooser.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="QtHelpMenu.cs" />
     <Compile Include="QtItemContextMenu.cs" />
     <Compile Include="QtMainMenu.cs" />
     <Compile Include="QtProjectContextMenu.cs" />
@@ -84,26 +89,36 @@
       <SubType>Form</SubType>
     </Compile>
     <Compile Include="ResClass.cs" />
-    <Compile Include="DefaultEditorsClient.cs" />
     <Compile Include="Translation.cs" />
     <Compile Include="Vsix.cs" />
     <Compile Include="VSQtSettings.cs" />
   </ItemGroup>
   <ItemGroup>
-    <Content Include="..\..\LICENSE.GPL3-EXCEPT">
-      <Link>LICENSE.GPL3-EXCEPT</Link>
+    <Content Include="..\..\Changelog">
+      <Link>Changelog</Link>
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       <IncludeInVSIX>true</IncludeInVSIX>
     </Content>
-    <Content Include="..\..\Changelog">
-      <Link>Changelog</Link>
+    <Content Include="..\..\LICENSE.GPL3-EXCEPT">
+      <Link>LICENSE.GPL3-EXCEPT</Link>
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       <IncludeInVSIX>true</IncludeInVSIX>
     </Content>
+    <None Include="packages.config" />
     <None Include="source.extension.vsixmanifest">
     </None>
   </ItemGroup>
   <ItemGroup>
+    <Content Include="..\packages\System.Data.SQLite.Core.1.0.102.0\build\net45\x64\SQLite.Interop.dll">
+      <Link>x64\SQLite.Interop.dll</Link>
+      <IncludeInVSIX>true</IncludeInVSIX>
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+    <Content Include="..\packages\System.Data.SQLite.Core.1.0.102.0\build\net45\x86\SQLite.Interop.dll">
+      <Link>x86\SQLite.Interop.dll</Link>
+      <IncludeInVSIX>true</IncludeInVSIX>
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
     <Content Include="..\qtvisualizer\qt5.natvis">
       <Link>Visualizer\qt5.natvis</Link>
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
@@ -248,6 +263,19 @@
       <IncludeOutputGroupsInVSIXLocalOnly>DebugSymbolsProjectOutputGroup%3b</IncludeOutputGroupsInVSIXLocalOnly>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System.Data" />
+    <Reference Include="System.Data.SQLite, Version=1.0.102.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Data.SQLite.Core.1.0.102.0\lib\net45\System.Data.SQLite.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Page Include="QtHelpLinkChooser.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
+  </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <Import Project="..\VS2013.References.targets" Condition=" '$(VisualStudioVersion)' == '12.0' " />
   <Import Project="..\VS2015.References.targets" Condition=" '$(VisualStudioVersion)' == '14.0' " />
@@ -274,4 +302,11 @@
     <Exec Command="$(QtArchiveGen) source=$(QMakeFileReader) target=$(TargetDir)\$(TargetName).vsix" />
     <Message Text="Completed post build target for $(ProjectName)." Importance="high" />
   </Target>
+  <Import Project="..\packages\System.Data.SQLite.Core.1.0.102.0\build\net45\System.Data.SQLite.Core.targets" Condition="Exists('..\packages\System.Data.SQLite.Core.1.0.102.0\build\net45\System.Data.SQLite.Core.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\System.Data.SQLite.Core.1.0.102.0\build\net45\System.Data.SQLite.Core.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\System.Data.SQLite.Core.1.0.102.0\build\net45\System.Data.SQLite.Core.targets'))" />
+  </Target>
 </Project>
\ No newline at end of file
diff --git a/src/qtvstools/Vsix.cs b/src/qtvstools/Vsix.cs
index 35bae720..f4aa8601 100644
--- a/src/qtvstools/Vsix.cs
+++ b/src/qtvstools/Vsix.cs
@@ -137,6 +137,7 @@ namespace QtVsTools
             QtProjectContextMenu.Initialize(this);
             QtItemContextMenu.Initialize(this);
             DefaultEditorsHandler.Initialize(Dte);
+            QtHelpMenu.Initialize(this);
 
             try {
                 UpdateDefaultEditors(Mode.Startup);
diff --git a/src/qtvstools/packages.config b/src/qtvstools/packages.config
new file mode 100644
index 00000000..33ddd19a
--- /dev/null
+++ b/src/qtvstools/packages.config
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="System.Data.SQLite.Core" version="1.0.102.0" targetFramework="net45" />
+</packages>
\ No newline at end of file
diff --git a/src/qtvstools/source.extension.vsixmanifest b/src/qtvstools/source.extension.vsixmanifest
index 5c8b95ba..636c7f61 100644
--- a/src/qtvstools/source.extension.vsixmanifest
+++ b/src/qtvstools/source.extension.vsixmanifest
@@ -61,5 +61,13 @@
         <Asset Type="Microsoft.VisualStudio.ItemTemplate" d:Source="Project" d:ProjectName="MainWindow" d:TargetPath="|MainWindow;TemplateProjectOutputGroup|" Path="ItemTemplates" d:VsixSubPath="ItemTemplates" />
         <Asset Type="Microsoft.VisualStudio.ItemTemplate" d:Source="Project" d:ProjectName="Widget" d:TargetPath="|Widget;TemplateProjectOutputGroup|" Path="ItemTemplates" d:VsixSubPath="ItemTemplates" />
         <Asset Type="NativeVisualizer" d:Source="File" Path="Visualizer\qt5.natvis" />
-    </Assets>
+    <Asset Type="File"
+           d:Source="File"
+           Path="x64\SQLite.Interop.dll"
+           d:VsixSubPath="x64" />
+    <Asset Type="file"
+           d:Source="File"
+           Path="x86\SQLite.Interop.dll"
+           d:VsixSubPath="x86" />
+  </Assets>
 </PackageManifest>
-- 
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