Tweak CefSharp to allow multiple instances, remove progressbar

Form1.Designer.cs

@@ -33,27 +33,26 @@
             fileToolStripMenuItem = new ToolStripMenuItem();
             openDevToolsToolStripMenuItem = new ToolStripMenuItem();
             exitToolStripMenuItem = new ToolStripMenuItem();
-            helpToolStripMenuItem = new ToolStripMenuItem();
-            aboutToolStripMenuItem = new ToolStripMenuItem();
             renderToolStripMenuItem = new ToolStripMenuItem();
             fontFamilyToolStripMenuItem = new ToolStripMenuItem();
             serifToolStripMenuItem = new ToolStripMenuItem();
             sansSerifToolStripMenuItem = new ToolStripMenuItem();
             forceMonospaceToolStripMenuItem = new ToolStripMenuItem();
+            colorThemeToolStripMenuItem = new ToolStripMenuItem();
+            systemToolStripMenuItem = new ToolStripMenuItem();
+            lightToolStripMenuItem = new ToolStripMenuItem();
+            darkToolStripMenuItem = new ToolStripMenuItem();
+            helpToolStripMenuItem = new ToolStripMenuItem();
+            aboutToolStripMenuItem = new ToolStripMenuItem();
             Opener = new OpenFileDialog();
             Saver = new SaveFileDialog();
             groupBox4 = new GroupBox();
             chromiumWebBrowser1 = new CefSharp.WinForms.ChromiumWebBrowser();
-            progressBar1 = new ProgressBar();
             button4 = new Button();
             button3 = new Button();
             groupBox3 = new GroupBox();
             button2 = new Button();
             textBox2 = new TextBox();
-            colorThemeToolStripMenuItem = new ToolStripMenuItem();
-            systemToolStripMenuItem = new ToolStripMenuItem();
-            lightToolStripMenuItem = new ToolStripMenuItem();
-            darkToolStripMenuItem = new ToolStripMenuItem();
             menuStrip1.SuspendLayout();
             groupBox4.SuspendLayout();
             groupBox3.SuspendLayout();
@@ -61,7 +60,7 @@
             // 
             // menuStrip1
             // 
-            menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, helpToolStripMenuItem, renderToolStripMenuItem });
+            menuStrip1.Items.AddRange(new ToolStripItem[] { fileToolStripMenuItem, renderToolStripMenuItem, helpToolStripMenuItem });
             menuStrip1.Location = new Point(0, 0);
             menuStrip1.Name = "menuStrip1";
             menuStrip1.RenderMode = ToolStripRenderMode.System;
@@ -91,33 +90,19 @@
             exitToolStripMenuItem.Text = "Exit";
             exitToolStripMenuItem.Click += exitToolStripMenuItem_Click;
             // 
-            // helpToolStripMenuItem
-            // 
-            helpToolStripMenuItem.Alignment = ToolStripItemAlignment.Right;
-            helpToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { aboutToolStripMenuItem });
-            helpToolStripMenuItem.Name = "helpToolStripMenuItem";
-            helpToolStripMenuItem.Size = new Size(44, 20);
-            helpToolStripMenuItem.Text = "Help";
-            // 
-            // aboutToolStripMenuItem
-            // 
-            aboutToolStripMenuItem.Name = "aboutToolStripMenuItem";
-            aboutToolStripMenuItem.Size = new Size(107, 22);
-            aboutToolStripMenuItem.Text = "About";
-            aboutToolStripMenuItem.Click += aboutToolStripMenuItem_Click;
-            // 
             // renderToolStripMenuItem
             // 
             renderToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { fontFamilyToolStripMenuItem, colorThemeToolStripMenuItem });
             renderToolStripMenuItem.Name = "renderToolStripMenuItem";
             renderToolStripMenuItem.Size = new Size(56, 20);
             renderToolStripMenuItem.Text = "Render";
+            renderToolStripMenuItem.Click += renderToolStripMenuItem_Click;
             // 
             // fontFamilyToolStripMenuItem
             // 
             fontFamilyToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { serifToolStripMenuItem, sansSerifToolStripMenuItem, forceMonospaceToolStripMenuItem });
             fontFamilyToolStripMenuItem.Name = "fontFamilyToolStripMenuItem";
-            fontFamilyToolStripMenuItem.Size = new Size(180, 22);
+            fontFamilyToolStripMenuItem.Size = new Size(140, 22);
             fontFamilyToolStripMenuItem.Text = "Font Family";
             // 
             // serifToolStripMenuItem
@@ -143,121 +128,11 @@
             forceMonospaceToolStripMenuItem.Text = "(Force) Monospace";
             forceMonospaceToolStripMenuItem.Click += forceMonospaceToolStripMenuItem_Click;
             // 
-            // Opener
-            // 
-            Opener.DefaultExt = "md";
-            Opener.Filter = "Markdown files|*.md|All files|*.*";
-            Opener.SupportMultiDottedExtensions = true;
-            // 
-            // Saver
-            // 
-            Saver.CheckPathExists = false;
-            Saver.DefaultExt = "html";
-            Saver.Filter = "HTML websites|*.html|All files|*.*";
-            // 
-            // groupBox4
-            // 
-            groupBox4.Controls.Add(chromiumWebBrowser1);
-            groupBox4.Controls.Add(progressBar1);
-            groupBox4.Controls.Add(button4);
-            groupBox4.Dock = DockStyle.Fill;
-            groupBox4.FlatStyle = FlatStyle.System;
-            groupBox4.Location = new Point(0, 91);
-            groupBox4.Name = "groupBox4";
-            groupBox4.Size = new Size(800, 378);
-            groupBox4.TabIndex = 3;
-            groupBox4.TabStop = false;
-            groupBox4.Text = "Preview";
-            groupBox4.UseCompatibleTextRendering = true;
-            groupBox4.Enter += groupBox4_Enter;
-            // 
-            // chromiumWebBrowser1
-            // 
-            chromiumWebBrowser1.ActivateBrowserOnCreation = false;
-            chromiumWebBrowser1.Dock = DockStyle.Fill;
-            chromiumWebBrowser1.Location = new Point(3, 47);
-            chromiumWebBrowser1.Name = "chromiumWebBrowser1";
-            chromiumWebBrowser1.Size = new Size(794, 328);
-            chromiumWebBrowser1.TabIndex = 3;
-            chromiumWebBrowser1.LoadingStateChanged += chromiumWebBrowser1_LoadingStateChanged;
-            // 
-            // progressBar1
-            // 
-            progressBar1.Dock = DockStyle.Top;
-            progressBar1.Location = new Point(3, 42);
-            progressBar1.Name = "progressBar1";
-            progressBar1.Size = new Size(794, 5);
-            progressBar1.Style = ProgressBarStyle.Marquee;
-            progressBar1.TabIndex = 2;
-            // 
-            // button4
-            // 
-            button4.Dock = DockStyle.Top;
-            button4.Enabled = false;
-            button4.FlatStyle = FlatStyle.Flat;
-            button4.Location = new Point(3, 19);
-            button4.Name = "button4";
-            button4.Size = new Size(794, 23);
-            button4.TabIndex = 1;
-            button4.Text = "Render preview";
-            button4.UseVisualStyleBackColor = true;
-            button4.Click += button4_Click;
-            // 
-            // button3
-            // 
-            button3.BackColor = Color.Transparent;
-            button3.Dock = DockStyle.Bottom;
-            button3.Enabled = false;
-            button3.FlatStyle = FlatStyle.Flat;
-            button3.Location = new Point(0, 469);
-            button3.Name = "button3";
-            button3.Size = new Size(800, 23);
-            button3.TabIndex = 4;
-            button3.Text = "Convert";
-            button3.UseVisualStyleBackColor = false;
-            button3.Click += button3_Click;
-            // 
-            // groupBox3
-            // 
-            groupBox3.Controls.Add(button2);
-            groupBox3.Controls.Add(textBox2);
-            groupBox3.Dock = DockStyle.Top;
-            groupBox3.FlatStyle = FlatStyle.System;
-            groupBox3.Location = new Point(0, 24);
-            groupBox3.Name = "groupBox3";
-            groupBox3.Size = new Size(800, 67);
-            groupBox3.TabIndex = 2;
-            groupBox3.TabStop = false;
-            groupBox3.Text = "Input file";
-            // 
-            // button2
-            // 
-            button2.Dock = DockStyle.Fill;
-            button2.FlatStyle = FlatStyle.Flat;
-            button2.Location = new Point(3, 35);
-            button2.Name = "button2";
-            button2.Size = new Size(794, 29);
-            button2.TabIndex = 3;
-            button2.Text = "Select file";
-            button2.UseVisualStyleBackColor = true;
-            button2.Click += button2_Click;
-            // 
-            // textBox2
-            // 
-            textBox2.BorderStyle = BorderStyle.None;
-            textBox2.Dock = DockStyle.Top;
-            textBox2.Location = new Point(3, 19);
-            textBox2.Name = "textBox2";
-            textBox2.PlaceholderText = "Type path or select file below. ";
-            textBox2.Size = new Size(794, 16);
-            textBox2.TabIndex = 2;
-            textBox2.TextChanged += textBox2_TextChanged;
-            // 
             // colorThemeToolStripMenuItem
             // 
             colorThemeToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { systemToolStripMenuItem, lightToolStripMenuItem, darkToolStripMenuItem });
             colorThemeToolStripMenuItem.Name = "colorThemeToolStripMenuItem";
-            colorThemeToolStripMenuItem.Size = new Size(180, 22);
+            colorThemeToolStripMenuItem.Size = new Size(140, 22);
             colorThemeToolStripMenuItem.Text = "Color theme";
             // 
             // systemToolStripMenuItem
@@ -283,6 +158,120 @@
             darkToolStripMenuItem.Size = new Size(161, 22);
             darkToolStripMenuItem.Text = "Dark";
             // 
+            // helpToolStripMenuItem
+            // 
+            helpToolStripMenuItem.Alignment = ToolStripItemAlignment.Right;
+            helpToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { aboutToolStripMenuItem });
+            helpToolStripMenuItem.Name = "helpToolStripMenuItem";
+            helpToolStripMenuItem.Size = new Size(44, 20);
+            helpToolStripMenuItem.Text = "Help";
+            // 
+            // aboutToolStripMenuItem
+            // 
+            aboutToolStripMenuItem.Name = "aboutToolStripMenuItem";
+            aboutToolStripMenuItem.Size = new Size(107, 22);
+            aboutToolStripMenuItem.Text = "About";
+            aboutToolStripMenuItem.Click += aboutToolStripMenuItem_Click;
+            // 
+            // Opener
+            // 
+            Opener.DefaultExt = "md";
+            Opener.Filter = "Markdown files|*.md|All files|*.*";
+            Opener.SupportMultiDottedExtensions = true;
+            // 
+            // Saver
+            // 
+            Saver.CheckPathExists = false;
+            Saver.DefaultExt = "html";
+            Saver.Filter = "HTML websites|*.html|All files|*.*";
+            // 
+            // groupBox4
+            // 
+            groupBox4.Controls.Add(chromiumWebBrowser1);
+            groupBox4.Controls.Add(button4);
+            groupBox4.Dock = DockStyle.Fill;
+            groupBox4.FlatStyle = FlatStyle.System;
+            groupBox4.Location = new Point(0, 91);
+            groupBox4.Name = "groupBox4";
+            groupBox4.Size = new Size(800, 378);
+            groupBox4.TabIndex = 3;
+            groupBox4.TabStop = false;
+            groupBox4.Text = "Preview";
+            groupBox4.UseCompatibleTextRendering = true;
+            groupBox4.Enter += groupBox4_Enter;
+            // 
+            // chromiumWebBrowser1
+            // 
+            chromiumWebBrowser1.ActivateBrowserOnCreation = false;
+            chromiumWebBrowser1.Dock = DockStyle.Fill;
+            chromiumWebBrowser1.Location = new Point(3, 42);
+            chromiumWebBrowser1.Name = "chromiumWebBrowser1";
+            chromiumWebBrowser1.Size = new Size(794, 333);
+            chromiumWebBrowser1.TabIndex = 3;
+            chromiumWebBrowser1.AddressChanged += chromiumWebBrowser1_AddressChanged;
+            // 
+            // button4
+            // 
+            button4.Dock = DockStyle.Top;
+            button4.Enabled = false;
+            button4.FlatStyle = FlatStyle.System;
+            button4.Location = new Point(3, 19);
+            button4.Name = "button4";
+            button4.Size = new Size(794, 23);
+            button4.TabIndex = 1;
+            button4.Text = "Render preview";
+            button4.UseVisualStyleBackColor = true;
+            button4.Click += button4_Click;
+            // 
+            // button3
+            // 
+            button3.Dock = DockStyle.Bottom;
+            button3.Enabled = false;
+            button3.FlatStyle = FlatStyle.System;
+            button3.Location = new Point(0, 469);
+            button3.Name = "button3";
+            button3.Size = new Size(800, 23);
+            button3.TabIndex = 4;
+            button3.Text = "Convert";
+            button3.UseVisualStyleBackColor = false;
+            button3.Click += button3_Click;
+            // 
+            // groupBox3
+            // 
+            groupBox3.Controls.Add(button2);
+            groupBox3.Controls.Add(textBox2);
+            groupBox3.Dock = DockStyle.Top;
+            groupBox3.FlatStyle = FlatStyle.System;
+            groupBox3.Location = new Point(0, 24);
+            groupBox3.Name = "groupBox3";
+            groupBox3.Size = new Size(800, 67);
+            groupBox3.TabIndex = 2;
+            groupBox3.TabStop = false;
+            groupBox3.Text = "Input file";
+            // 
+            // button2
+            // 
+            button2.Dock = DockStyle.Fill;
+            button2.FlatStyle = FlatStyle.System;
+            button2.Location = new Point(3, 35);
+            button2.Name = "button2";
+            button2.Size = new Size(794, 29);
+            button2.TabIndex = 3;
+            button2.Text = "Select file";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += button2_Click;
+            // 
+            // textBox2
+            // 
+            textBox2.BorderStyle = BorderStyle.None;
+            textBox2.Dock = DockStyle.Top;
+            textBox2.Location = new Point(3, 19);
+            textBox2.Name = "textBox2";
+            textBox2.PlaceholderText = "Type path or select file below. ";
+            textBox2.Size = new Size(794, 16);
+            textBox2.TabIndex = 2;
+            textBox2.TextChanged += textBox2_TextChanged;
+            // 
             // Form1
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
@@ -319,11 +308,6 @@
         private Button button3;
         private Button button4;
         private ToolStripMenuItem renderToolStripMenuItem;
-        private ToolStripMenuItem fontFamilyToolStripMenuItem;
-        private ToolStripMenuItem serifToolStripMenuItem;
-        private ToolStripMenuItem sansSerifToolStripMenuItem;
-        private ToolStripMenuItem forceMonospaceToolStripMenuItem;
-        private ProgressBar progressBar1;
         private ToolStripMenuItem openDevToolsToolStripMenuItem;
         private ToolStripMenuItem exitToolStripMenuItem;
         private GroupBox groupBox3;
@@ -334,5 +318,9 @@
         private ToolStripMenuItem systemToolStripMenuItem;
         private ToolStripMenuItem lightToolStripMenuItem;
         private ToolStripMenuItem darkToolStripMenuItem;
+        private ToolStripMenuItem fontFamilyToolStripMenuItem;
+        private ToolStripMenuItem serifToolStripMenuItem;
+        private ToolStripMenuItem sansSerifToolStripMenuItem;
+        private ToolStripMenuItem forceMonospaceToolStripMenuItem;
     }
 }

Form1.cs

@@ -1,7 +1,9 @@
 using CefSharp;
 using CefSharp.WinForms;
 using Markdig;
+using System.Diagnostics;
 using System.Linq.Expressions;
+using System.Security.Policy;
 
 namespace MintHTML
 {
@@ -167,6 +169,8 @@ namespace MintHTML
 </svg>
 ";
         string css;
+        bool extraInstance = false;
+        int extraNum = 0;
         // Custom functions
         private void convert()
         {
@@ -176,26 +180,31 @@ namespace MintHTML
 
         public Form1()
         {
-            if (File.Exists(appdata + "/SweeZero/MintHTML/RootCache/lockfile"))
+            if (File.Exists(appdata + "/SweeZero/MintHTML/Caches/Instance/lockfile"))
             {
-                if (MessageBox.Show("There is another instance of MintHTML running. If there isn't, press Yes to try opening anyways.", "Cef Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)
+                extraInstance = true;
+                extraNum = 1;
+                while (File.Exists(appdata + "/SweeZero/MintHTML/Caches/Instance" + extraNum.ToString() + "/lockfile"))
                 {
-                    try
+                    extraNum++;
-                    {
-                        File.Delete(appdata + "/SweeZero/MintHTML/RootCache/lockfile");
-                    }
-                    catch (Exception ex)
-                    {
-                        MessageBox.Show(ex.Message, "Cef Error (fatal)", MessageBoxButtons.OK, MessageBoxIcon.Error);
-                    }
-                }
                 }
                 var settings = new CefSettings()
                 {
-                RootCachePath = appdata + "/SweeZero/MintHTML/RootCache",
+                    RootCachePath = appdata + "/SweeZero/MintHTML/Caches/Instance" + extraNum.ToString(),
+                    WindowlessRenderingEnabled = true,
                 };
-            InitializeComponent();
                 Cef.Initialize(settings);
+            }
+            else
+            {
+                var settings = new CefSettings()
+                {
+                    RootCachePath = appdata + "/SweeZero/MintHTML/Caches/Instance",
+                    WindowlessRenderingEnabled = true,
+                };
+                Cef.Initialize(settings);
+            }
+            InitializeComponent();
             css = @"<style>
 html{
 font-family: sans-serif
@@ -231,7 +240,7 @@ font-family: sans-serif
             DialogResult result = Saver.ShowDialog();
             if (result == DialogResult.OK)
             {
-                if (MessageBox.Show("Do you want to keep the current CSS settings?", "Converter", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
+                if (MessageBox.Show("Do you want to convert the rendering settings to CSS?", "Converter", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                 {
                     convert();
                     File.WriteAllText(Saver.FileName, css + htmlfile);
@@ -251,12 +260,6 @@ font-family: sans-serif
             Cef.Shutdown();
         }
 
-        private void chromiumWebBrowser1_LoadingStateChanged(object sender, LoadingStateChangedEventArgs e)
-        {
-            this.Invoke(new Action(() => progressBar1.Visible = chromiumWebBrowser1.IsLoading));
-            this.Invoke(new Action(() => openDevToolsToolStripMenuItem.Enabled = !chromiumWebBrowser1.IsLoading));
-        }
-
         private void openDevToolsToolStripMenuItem_Click_1(object sender, EventArgs e)
         {
             chromiumWebBrowser1.ShowDevTools();
@@ -332,5 +335,22 @@ font-family: monospace
         {
 
         }
+
+        private void renderToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+        }
+
+        private void chromiumWebBrowser1_AddressChanged(object sender, AddressChangedEventArgs e)
+        {
+            if (!(chromiumWebBrowser1.Address.Substring(0, 5) == "data:"))
+            {
+                string address = chromiumWebBrowser1.Address;
+                chromiumWebBrowser1.Back();
+                if (MessageBox.Show("Open link?\n" + address, "Cef question", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
+                {
+                    Process.Start(new ProcessStartInfo(address) { UseShellExecute = true });
+                }
+            }
+        }
     }
 }

Program.cs

@@ -1,3 +1,7 @@
+using CefSharp;
+using CefSharp.DevTools.Page;
+using System.Net;
+using System.Security.Cryptography.X509Certificates;
 namespace MintHTML
 {
     internal static class Program