SubtitleEdit/src/Forms/GetDictionaries.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.IO.Compression;
using System.Net;
using System.Windows.Forms;
using System.Xml;
using Nikse.SubtitleEdit.Logic;

namespace Nikse.SubtitleEdit.Forms
{
    public sealed partial class GetDictionaries : Form
    {
        List<string> _dictionaryDownloadLinks = new List<string>();
        List<string> _descriptions = new List<string>();
        string _xmlName = null;

        public GetDictionaries()
        {
            InitializeComponent();

            Text = Configuration.Settings.Language.GetDictionaries.Title;
            labelDescription1.Text = Configuration.Settings.Language.GetDictionaries.DescriptionLine1;
            labelDescription2.Text = Configuration.Settings.Language.GetDictionaries.DescriptionLine2;
            linkLabelOpenDictionaryFolder.Text = Configuration.Settings.Language.GetDictionaries.OpenDictionariesFolder;
            labelChooseLanguageAndClickDownload.Text = Configuration.Settings.Language.GetDictionaries.ChooseLanguageAndClickDownload;
            buttonDownload.Text = Configuration.Settings.Language.GetDictionaries.Download;
            buttonOK.Text = Configuration.Settings.Language.General.OK;
            labelPleaseWait.Text = Configuration.Settings.Language.General.PleaseWait;

            LoadDictionaryList("Nikse.SubtitleEdit.Resources.OpenOfficeDictionaries.xml.zip");
            FixLargeFonts();
        }

        private void LoadDictionaryList(string xmlRessourceName)
        {
            _dictionaryDownloadLinks = new List<string>();
            _descriptions = new List<string>();
            _xmlName = xmlRessourceName;
            System.Reflection.Assembly asm = System.Reflection.Assembly.GetExecutingAssembly();
            Stream strm = asm.GetManifestResourceStream(_xmlName);
            if (strm != null)
            {
                comboBoxDictionaries.Items.Clear();
                XmlDocument doc = new XmlDocument();
                var rdr = new StreamReader(strm);
                using (var zip = new GZipStream(rdr.BaseStream, CompressionMode.Decompress))
                {
                    byte[] data = new byte[175000];
                    zip.Read(data, 0, 175000);
                    doc.LoadXml(System.Text.Encoding.UTF8.GetString(data));
                }
                rdr.Close();

                foreach (XmlNode node in doc.DocumentElement.SelectNodes("Dictionary"))
                {
                    string englishName = node.SelectSingleNode("EnglishName").InnerText;
                    string nativeName = node.SelectSingleNode("NativeName").InnerText;
                    string downloadLink = node.SelectSingleNode("DownloadLink").InnerText;

                    string description = string.Empty;
                    if (node.SelectSingleNode("Description") != null)
                        description = node.SelectSingleNode("Description").InnerText;

                    if (!string.IsNullOrEmpty(downloadLink))
                    {
                        string name = englishName;
                        if (!string.IsNullOrEmpty(nativeName))
                            name += " - " + nativeName;

                        comboBoxDictionaries.Items.Add(name);
                        _dictionaryDownloadLinks.Add(downloadLink);
                        _descriptions.Add(description);
                    }
                    comboBoxDictionaries.SelectedIndex = 0;
                }
            }
        }

        private void FixLargeFonts()
        {
            if (labelDescription1.Left + labelDescription1.Width + 5 > Width)
                Width = labelDescription1.Left + labelDescription1.Width + 5;

            Graphics graphics = this.CreateGraphics();
            SizeF textSize = graphics.MeasureString(buttonOK.Text, this.Font);
            if (textSize.Height > buttonOK.Height - 4)
            {
                int newButtonHeight = (int)(textSize.Height + 7 + 0.5);
                Utilities.SetButtonHeight(this, newButtonHeight, 1);
            }
        }

        private void FormGetDictionaries_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
                DialogResult = DialogResult.Cancel;
        }

        private void LinkLabel3LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            System.Diagnostics.Process.Start("http://nhunspell.sourceforge.net/");
        }

        private void LinkLabel4LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            string dictionaryFolder = Utilities.DictionaryFolder;
            if (!Directory.Exists(dictionaryFolder))
                Directory.CreateDirectory(dictionaryFolder);

            System.Diagnostics.Process.Start(dictionaryFolder);
        }

        private void buttonDownload_Click(object sender, System.EventArgs e)
        {
            try
            {
                labelPleaseWait.Text = Configuration.Settings.Language.General.PleaseWait;
                buttonOK.Enabled = false;
                buttonDownload.Enabled = false;
                comboBoxDictionaries.Enabled = false;
                this.Refresh();
                Cursor = Cursors.WaitCursor;

                int index = comboBoxDictionaries.SelectedIndex;
                string url = _dictionaryDownloadLinks[index];

                var wc = new WebClient { Proxy = Utilities.GetProxy() };
                wc.DownloadDataCompleted += new DownloadDataCompletedEventHandler(wc_DownloadDataCompleted);
                wc.DownloadDataAsync(new Uri(url));
                Cursor = Cursors.Default;
            }
            catch (Exception exception)
            {
                labelPleaseWait.Text = string.Empty;
                buttonOK.Enabled = true;
                buttonDownload.Enabled = true;
                comboBoxDictionaries.Enabled = true;
                Cursor = Cursors.Default;
                MessageBox.Show(exception.Message + Environment.NewLine + Environment.NewLine + exception.StackTrace);
            }
        }

        void wc_DownloadDataCompleted(object sender, DownloadDataCompletedEventArgs e)
        {
            if (e.Error != null && _xmlName == "Nikse.SubtitleEdit.Resources.OpenOfficeDictionaries.xml.zip")
            {
                MessageBox.Show("Unable to connect to extensions.services.openoffice.org... Switching host - please re-try!");
                LoadDictionaryList("Nikse.SubtitleEdit.Resources.HunspellDictionaries.xml.zip");
                labelPleaseWait.Text = string.Empty;
                buttonOK.Enabled = true;
                buttonDownload.Enabled = true;
                comboBoxDictionaries.Enabled = true;
                Cursor = Cursors.Default;
                return;
            }
            else if (e.Error != null)
            {
                MessageBox.Show("Download failed!");
                DialogResult = DialogResult.Cancel;
                return;
            }

            string dictionaryFolder = Utilities.DictionaryFolder;
            if (!Directory.Exists(dictionaryFolder))
                Directory.CreateDirectory(dictionaryFolder);

            int index = comboBoxDictionaries.SelectedIndex;

            var ms = new MemoryStream(e.Result);

            ZipExtractor zip = ZipExtractor.Open(ms);
            List<ZipExtractor.ZipFileEntry> dir = zip.ReadCentralDir();

            // Extract dic/aff files in dictionary folder
            string path;
            foreach (ZipExtractor.ZipFileEntry entry in dir)
            {
                if (entry.FilenameInZip.ToLower().EndsWith(".dic") || entry.FilenameInZip.ToLower().EndsWith(".aff"))
                {
                    string fileName = Path.GetFileName(entry.FilenameInZip);

                    // French fix
                    if (fileName.StartsWith("fr-moderne"))
                        fileName = fileName.Replace("fr-moderne", "fr_FR");

                    // German fix
                    if (fileName.StartsWith("de_DE_frami"))
                        fileName = fileName.Replace("de_DE_frami", "de_DE");

                    path = Path.Combine(dictionaryFolder, fileName);
                    zip.ExtractFile(entry, path);
                }
            }
            zip.Close();
            ms.Close();
            Cursor = Cursors.Default;
            labelPleaseWait.Text = string.Empty;
            buttonOK.Enabled = true;
            buttonDownload.Enabled = true;
            comboBoxDictionaries.Enabled = true;
            MessageBox.Show(string.Format(Configuration.Settings.Language.GetDictionaries.XDownloaded, comboBoxDictionaries.Items[index]));
        }

        private void comboBoxDictionaries_SelectedIndexChanged(object sender, EventArgs e)
        {
            int index = comboBoxDictionaries.SelectedIndex;
            labelPleaseWait.Text = _descriptions[index];
        }

    }
}