ChaseFlorell/BindableMarkdownView.cs

## readme.md

      
    Raw
  

              readme.md
            
          
    Bindable Markdown View for use with MvvmCross on the Android platform.

Dependencies:

MarkDownDeep

Keywords:

mvvmcross, mvvm cross, mvx, xamarin, android, monodroid, markdown, markdowndeep, binding, bindable, bind

  
## BindableMarkdownView.cs
using System;
using Android.Content;
using Android.Util;
using Android.Webkit;
using MarkdownDeep;

namespace FutureState.Droid.Ui.Controls
{
    public class BindalbeMarkdownView : WebView
    {
        private readonly Markdown _markdownDeep;
        private string _markdown;

        public BindableMarkdownView(Context context, IAttributeSet attrs)
            : base(context, attrs)
        {
            _markdownDeep = new Markdown();
        }

        public string Markdown
        {
            get { return _markdown; }
            set
            {
                if (string.IsNullOrEmpty(value)) return;

                _markdown = _markdownDeep.Transform(value);

                LoadData(_markdown, "text/html", "utf-8");
                UpdatedHtmlContent();
            }
        }

        public event EventHandler HtmlContentChanged;

        private void UpdatedHtmlContent()
        {
            var handler = HtmlContentChanged;
            if (handler != null)
                handler(this, EventArgs.Empty);
        }
    }
}

## BindableUIMarkdownView
using System;
using System.Drawing;
using System.Text;
using MarkdownDeep;
using MonoTouch.Foundation;
using MonoTouch.UIKit;

namespace FutureState.BreathingRoom.Touch.Ui.Controls
{
    public class BindableUIMarkdownView : UILabel
    {
        private readonly Markdown _markdownDeep;
        private string _markdown;
        private string _style;

        public BindableUIMarkdownView()
        {
            _markdownDeep = new Markdown();
            Insets = new UIEdgeInsets(0, 0, 0, 0);
        }

        public BindableUIMarkdownView(RectangleF frame)
            : base(frame)
        {
            _markdownDeep = new Markdown();
            Insets = new UIEdgeInsets(0, 0, 0, 0);
        }

        [Obsolete("Font wont work because the markdown renders HTML. Please use the Style property.")]
        public new UIFont Font { get; set; }

        public string Style
        {
            get
            {
                return string.IsNullOrWhiteSpace(_style) ? DefaultStyle : _style;
            }
            set
            {
                _style = value;
            }
        }

        public UIEdgeInsets Insets { get; set; }

        public string Markdown
        {
            get { return _markdown; }
            set
            {
                if (string.IsNullOrEmpty(value) || _markdown == value) return;

                _markdown = _markdownDeep.Transform(value);

                var html = new StringBuilder();
                html.Append("<html>");
                html.Append(string.Format("<style>{0}</style>", Style));
                html.Append("<body>");
                html.Append(_markdown);
                html.Append("</body>");
                html.Append("</html>");

                var attr = new NSAttributedStringDocumentAttributes { DocumentType = NSDocumentType.HTML };
                var nsError = new NSError();
                var output = new NSAttributedString(html.ToString(), attr, ref nsError);

                AttributedText = output;
                HandleHtmlContentChanged();
            }
        }

        public override void DrawText(RectangleF frame)
        {
            Layer.Bounds = new RectangleF(frame.X, frame.Y, frame.Width, frame.Height + Insets.Top + Insets.Bottom);
            base.DrawText(new RectangleF(
                              frame.X + Insets.Left,
                              frame.Y + Insets.Top,
                              frame.Width - Insets.Left - Insets.Right,
                              frame.Height));
        }

        public event EventHandler HtmlContentChanged;

        private void HandleHtmlContentChanged()
        {
            var handler = HtmlContentChanged;
            if (handler != null)
                handler(this, EventArgs.Empty);
        }
        private const string DefaultStyle = @"
body {
  font-family: Helvetica, arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  padding-top: 10px;
  padding-bottom: 10px;
  background-color: white;
  padding: 30px;
  margin: 10px;
  color: #333;
}

body > *:first-child {
  margin-top: 0 !important;
}

body > *:last-child {
  margin-bottom: 0 !important;
}

a {
  color: #4183C4;
  text-decoration: none;
}

a.absent {
  color: #cc0000;
}

a.anchor {
  display: block;
  padding-left: 30px;
  margin-left: -30px;
  cursor: pointer;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
}

h1, h2, h3, h4, h5, h6 {
  margin: 20px 0 10px;
  padding: 0;
  font-weight: bold;
  -webkit-font-smoothing: antialiased;
  cursor: text;
  position: relative;
}

h2:first-child, h1:first-child, h1:first-child + h2, h3:first-child, h4:first-child, h5:first-child, h6:first-child {
  margin-top: 0;
  padding-top: 0;
}

h1:hover a.anchor, h2:hover a.anchor, h3:hover a.anchor, h4:hover a.anchor, h5:hover a.anchor, h6:hover a.anchor {
  text-decoration: none;
}

h1 tt, h1 code {
  font-size: inherit;
}

h2 tt, h2 code {
  font-size: inherit;
}

h3 tt, h3 code {
  font-size: inherit;
}

h4 tt, h4 code {
  font-size: inherit;
}

h5 tt, h5 code {
  font-size: inherit;
}

h6 tt, h6 code {
  font-size: inherit;
}

h1 {
  font-size: 28px;
  color: black;
}

h2 {
  font-size: 24px;
  border-bottom: 1px solid #cccccc;
  color: black;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

h5 {
  font-size: 14px;
}

h6 {
  color: #777777;
  font-size: 14px;
}

p, blockquote, ul, ol, dl, li, table, pre {
  margin: 15px 0;
}

hr {
  border: 0 none;
  color: #222222;
  height: 4px;
  padding: 0;
}

body > h2:first-child {
  margin-top: 0;
  padding-top: 0;
}

body > h1:first-child {
  margin-top: 0;
  padding-top: 0;
}

body > h1:first-child + h2 {
  margin-top: 0;
  padding-top: 0;
}

body > h3:first-child, body > h4:first-child, body > h5:first-child, body > h6:first-child {
  margin-top: 0;
  padding-top: 0;
}

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
  margin-top: 0;
  padding-top: 0;
}

h1 p, h2 p, h3 p, h4 p, h5 p, h6 p {
  margin-top: 0;
}

li p.first {
  display: inline-block;
}

ul, ol {
  padding-left: 30px;
}

ul :first-child, ol :first-child {
  margin-top: 0;
}

ul :last-child, ol :last-child {
  margin-bottom: 0;
}

dl {
  padding: 0;
}

dl dt {
  font-size: 14px;
  font-weight: bold;
  font-style: italic;
  padding: 0;
  margin: 15px 0 5px;
}

dl dt:first-child {
  padding: 0;
}

dl dt > :first-child {
  margin-top: 0;
}

dl dt > :last-child {
  margin-bottom: 0;
}

dl dd {
  margin: 0 0 15px;
  padding: 0 15px;
}

dl dd > :first-child {
  margin-top: 0;
}

dl dd > :last-child {
  margin-bottom: 0;
}

blockquote {
  border-left: 4px solid #dddddd;
  padding: 15px;
  margin: 15px;
  color: #777777;
}

blockquote > :first-child {
  margin-top: 0;
}

blockquote > :last-child {
  margin-bottom: 0;
}

table {
  padding: 0;
}
table tr {
  border-top: 1px solid #cccccc;
  background-color: white;
  margin: 0;
  padding: 0;
}

table tr:nth-child(2n) {
  background-color: #f8f8f8;
}

table tr th {
  font-weight: bold;
  border: 1px solid #cccccc;
  text-align: left;
  margin: 0;
  padding: 6px 13px;
}

table tr td {
  border: 1px solid #cccccc;
  text-align: left;
  margin: 0;
  padding: 6px 13px;
}

table tr th :first-child, table tr td :first-child {
  margin-top: 0;
}

table tr th :last-child, table tr td :last-child {
  margin-bottom: 0;
}

img {
  max-width: 100%;
}

span.frame {
  display: block;
  overflow: hidden;
}

span.frame > span {
  border: 1px solid #dddddd;
  display: block;
  float: left;
  overflow: hidden;
  margin: 13px 0 0;
  padding: 7px;
  width: auto;
}

span.frame span img {
  display: block;
  float: left;
}

span.frame span span {
  clear: both;
  color: #333333;
  display: block;
  padding: 5px 0 0;
}

span.align-center {
  display: block;
  overflow: hidden;
  clear: both;
}

span.align-center > span {
  display: block;
  overflow: hidden;
  margin: 13px auto 0;
  text-align: center;
}

span.align-center span img {
  margin: 0 auto;
  text-align: center;
}

span.align-right {
  display: block;
  overflow: hidden;
  clear: both;
}

span.align-right > span {
  display: block;
  overflow: hidden;
  margin: 13px 0 0;
  text-align: right;
}

span.align-right span img {
  margin: 0;
  text-align: right;
}

span.float-left {
  display: block;
  margin-right: 13px;
  overflow: hidden;
  float: left;
}

span.float-left span {
  margin: 13px 0 0;
}

span.float-right {
  display: block;
  margin-left: 13px;
  overflow: hidden;
  float: right;
}

span.float-right > span {
  display: block;
  overflow: hidden;
  margin: 13px auto 0;
  text-align: right;
}

code, tt {
  margin: 0 2px;
  padding: 0 5px;
  white-space: nowrap;
  border: 1px solid #eaeaea;
  background-color: #f8f8f8;
  border-radius: 3px;
}

pre code {
  margin: 0;
  padding: 0;
  white-space: pre;
  border: none;
  background: transparent;
}

.highlight pre {
  background-color: #f8f8f8;
  border: 1px solid #cccccc;
  font-size: 13px;
  line-height: 19px;
  overflow: auto;
  padding: 6px 10px;
  border-radius: 3px;
}

pre {
  background-color: #f8f8f8;
  border: 1px solid #cccccc;
  font-size: 13px;
  line-height: 19px;
  overflow: auto;
  padding: 6px 10px;
  border-radius: 3px;
}

pre code, pre tt {
  background-color: transparent;
  border: none;
}";
    }
}

## usage-droid.axml
        <BindalbeMarkdownView
            android:id="@+id/MyWebContent"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:layout_marginBottom="10dp"
            android:padding="10dp"
            android:textColor="@color/breathingroom_mediumgray"
            local:MvxBind="Markdown MyMarkdownProperty/>

## usage-touch.cs
            var myMarkdown = new BindableMarkdownView {
                    TextColor = CustomUIColor.breathingroom_darkgray,
                    BackgroundColor = UIColor.Clear,
                    Lines = 0,
                    Insets = new UIEdgeInsets(0, 5, 10, 5),
            };
            myMarkdown.Layer.CornerRadius = 3;
            myMarkdown.Layer.BorderColor = UIColor.Gray.CGColor;
            myMarkdown.Layer.BackgroundColor = UIColor.White.CGColor;

            var set = this.CreateBindingSet<SomeView, SomeViewModel>();

            set.Bind(myMarkdown).For(p => p.Markdown).To(vm => vm.MyMarkdownProperty);

            set.Apply();
	using System;
	using Android.Content;
	using Android.Util;
	using Android.Webkit;
	using MarkdownDeep;

	namespace FutureState.Droid.Ui.Controls
	{
	public class BindalbeMarkdownView : WebView
	{
	private readonly Markdown _markdownDeep;
	private string _markdown;

	public BindableMarkdownView(Context context, IAttributeSet attrs)
	: base(context, attrs)
	{
	_markdownDeep = new Markdown();
	}

	public string Markdown
	{
	get { return _markdown; }
	set
	{
	if (string.IsNullOrEmpty(value)) return;

	_markdown = _markdownDeep.Transform(value);

	LoadData(_markdown, "text/html", "utf-8");
	UpdatedHtmlContent();
	}
	}

	public event EventHandler HtmlContentChanged;

	private void UpdatedHtmlContent()
	{
	var handler = HtmlContentChanged;
	if (handler != null)
	handler(this, EventArgs.Empty);
	}
	}
	}
	using System;
	using System.Drawing;
	using System.Text;
	using MarkdownDeep;
	using MonoTouch.Foundation;
	using MonoTouch.UIKit;

	namespace FutureState.BreathingRoom.Touch.Ui.Controls
	{
	public class BindableUIMarkdownView : UILabel
	{
	private readonly Markdown _markdownDeep;
	private string _markdown;
	private string _style;

	public BindableUIMarkdownView()
	{
	_markdownDeep = new Markdown();
	Insets = new UIEdgeInsets(0, 0, 0, 0);
	}

	public BindableUIMarkdownView(RectangleF frame)
	: base(frame)
	{
	_markdownDeep = new Markdown();
	Insets = new UIEdgeInsets(0, 0, 0, 0);
	}

	[Obsolete("Font wont work because the markdown renders HTML. Please use the Style property.")]
	public new UIFont Font { get; set; }

	public string Style
	{
	get
	{
	return string.IsNullOrWhiteSpace(_style) ? DefaultStyle : _style;
	}
	set
	{
	_style = value;
	}
	}

	public UIEdgeInsets Insets { get; set; }

	public string Markdown
	{
	get { return _markdown; }
	set
	{
	if (string.IsNullOrEmpty(value) \|\| _markdown == value) return;

	_markdown = _markdownDeep.Transform(value);

	var html = new StringBuilder();
	html.Append("<html>");
	html.Append(string.Format("<style>{0}</style>", Style));
	html.Append("<body>");
	html.Append(_markdown);
	html.Append("</body>");
	html.Append("</html>");

	var attr = new NSAttributedStringDocumentAttributes { DocumentType = NSDocumentType.HTML };
	var nsError = new NSError();
	var output = new NSAttributedString(html.ToString(), attr, ref nsError);

	AttributedText = output;
	HandleHtmlContentChanged();
	}
	}

	public override void DrawText(RectangleF frame)
	{
	Layer.Bounds = new RectangleF(frame.X, frame.Y, frame.Width, frame.Height + Insets.Top + Insets.Bottom);
	base.DrawText(new RectangleF(
	frame.X + Insets.Left,
	frame.Y + Insets.Top,
	frame.Width - Insets.Left - Insets.Right,
	frame.Height));
	}

	public event EventHandler HtmlContentChanged;

	private void HandleHtmlContentChanged()
	{
	var handler = HtmlContentChanged;
	if (handler != null)
	handler(this, EventArgs.Empty);
	}
	private const string DefaultStyle = @"
	body {
	font-family: Helvetica, arial, sans-serif;
	font-size: 14px;
	line-height: 1.6;
	padding-top: 10px;
	padding-bottom: 10px;
	background-color: white;
	padding: 30px;
	margin: 10px;
	color: #333;
	}

	body > *:first-child {
	margin-top: 0 !important;
	}

	body > *:last-child {
	margin-bottom: 0 !important;
	}

	a {
	color: #4183C4;
	text-decoration: none;
	}

	a.absent {
	color: #cc0000;
	}

	a.anchor {
	display: block;
	padding-left: 30px;
	margin-left: -30px;
	cursor: pointer;
	position: absolute;
	top: 0;
	left: 0;
	bottom: 0;
	}

	h1, h2, h3, h4, h5, h6 {
	margin: 20px 0 10px;
	padding: 0;
	font-weight: bold;
	-webkit-font-smoothing: antialiased;
	cursor: text;
	position: relative;
	}

	h2:first-child, h1:first-child, h1:first-child + h2, h3:first-child, h4:first-child, h5:first-child, h6:first-child {
	margin-top: 0;
	padding-top: 0;
	}

	h1:hover a.anchor, h2:hover a.anchor, h3:hover a.anchor, h4:hover a.anchor, h5:hover a.anchor, h6:hover a.anchor {
	text-decoration: none;
	}

	h1 tt, h1 code {
	font-size: inherit;
	}

	h2 tt, h2 code {
	font-size: inherit;
	}

	h3 tt, h3 code {
	font-size: inherit;
	}

	h4 tt, h4 code {
	font-size: inherit;
	}

	h5 tt, h5 code {
	font-size: inherit;
	}

	h6 tt, h6 code {
	font-size: inherit;
	}

	h1 {
	font-size: 28px;
	color: black;
	}

	h2 {
	font-size: 24px;
	border-bottom: 1px solid #cccccc;
	color: black;
	}

	h3 {
	font-size: 18px;
	}

	h4 {
	font-size: 16px;
	}

	h5 {
	font-size: 14px;
	}

	h6 {
	color: #777777;
	font-size: 14px;
	}

	p, blockquote, ul, ol, dl, li, table, pre {
	margin: 15px 0;
	}

	hr {
	border: 0 none;
	color: #222222;
	height: 4px;
	padding: 0;
	}

	body > h2:first-child {
	margin-top: 0;
	padding-top: 0;
	}

	body > h1:first-child {
	margin-top: 0;
	padding-top: 0;
	}

	body > h1:first-child + h2 {
	margin-top: 0;
	padding-top: 0;
	}

	body > h3:first-child, body > h4:first-child, body > h5:first-child, body > h6:first-child {
	margin-top: 0;
	padding-top: 0;
	}

	a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
	margin-top: 0;
	padding-top: 0;
	}

	h1 p, h2 p, h3 p, h4 p, h5 p, h6 p {
	margin-top: 0;
	}

	li p.first {
	display: inline-block;
	}

	ul, ol {
	padding-left: 30px;
	}

	ul :first-child, ol :first-child {
	margin-top: 0;
	}

	ul :last-child, ol :last-child {
	margin-bottom: 0;
	}

	dl {
	padding: 0;
	}

	dl dt {
	font-size: 14px;
	font-weight: bold;
	font-style: italic;
	padding: 0;
	margin: 15px 0 5px;
	}

	dl dt:first-child {
	padding: 0;
	}

	dl dt > :first-child {
	margin-top: 0;
	}

	dl dt > :last-child {
	margin-bottom: 0;
	}

	dl dd {
	margin: 0 0 15px;
	padding: 0 15px;
	}

	dl dd > :first-child {
	margin-top: 0;
	}

	dl dd > :last-child {
	margin-bottom: 0;
	}

	blockquote {
	border-left: 4px solid #dddddd;
	padding: 15px;
	margin: 15px;
	color: #777777;
	}

	blockquote > :first-child {
	margin-top: 0;
	}

	blockquote > :last-child {
	margin-bottom: 0;
	}

	table {
	padding: 0;
	}
	table tr {
	border-top: 1px solid #cccccc;
	background-color: white;
	margin: 0;
	padding: 0;
	}

	table tr:nth-child(2n) {
	background-color: #f8f8f8;
	}

	table tr th {
	font-weight: bold;
	border: 1px solid #cccccc;
	text-align: left;
	margin: 0;
	padding: 6px 13px;
	}

	table tr td {
	border: 1px solid #cccccc;
	text-align: left;
	margin: 0;
	padding: 6px 13px;
	}

	table tr th :first-child, table tr td :first-child {
	margin-top: 0;
	}

	table tr th :last-child, table tr td :last-child {
	margin-bottom: 0;
	}

	img {
	max-width: 100%;
	}

	span.frame {
	display: block;
	overflow: hidden;
	}

	span.frame > span {
	border: 1px solid #dddddd;
	display: block;
	float: left;
	overflow: hidden;
	margin: 13px 0 0;
	padding: 7px;
	width: auto;
	}

	span.frame span img {
	display: block;
	float: left;
	}

	span.frame span span {
	clear: both;
	color: #333333;
	display: block;
	padding: 5px 0 0;
	}

	span.align-center {
	display: block;
	overflow: hidden;
	clear: both;
	}

	span.align-center > span {
	display: block;
	overflow: hidden;
	margin: 13px auto 0;
	text-align: center;
	}

	span.align-center span img {
	margin: 0 auto;
	text-align: center;
	}

	span.align-right {
	display: block;
	overflow: hidden;
	clear: both;
	}

	span.align-right > span {
	display: block;
	overflow: hidden;
	margin: 13px 0 0;
	text-align: right;
	}

	span.align-right span img {
	margin: 0;
	text-align: right;
	}

	span.float-left {
	display: block;
	margin-right: 13px;
	overflow: hidden;
	float: left;
	}

	span.float-left span {
	margin: 13px 0 0;
	}

	span.float-right {
	display: block;
	margin-left: 13px;
	overflow: hidden;
	float: right;
	}

	span.float-right > span {
	display: block;
	overflow: hidden;
	margin: 13px auto 0;
	text-align: right;
	}

	code, tt {
	margin: 0 2px;
	padding: 0 5px;
	white-space: nowrap;
	border: 1px solid #eaeaea;
	background-color: #f8f8f8;
	border-radius: 3px;
	}

	pre code {
	margin: 0;
	padding: 0;
	white-space: pre;
	border: none;
	background: transparent;
	}

	.highlight pre {
	background-color: #f8f8f8;
	border: 1px solid #cccccc;
	font-size: 13px;
	line-height: 19px;
	overflow: auto;
	padding: 6px 10px;
	border-radius: 3px;
	}

	pre {
	background-color: #f8f8f8;
	border: 1px solid #cccccc;
	font-size: 13px;
	line-height: 19px;
	overflow: auto;
	padding: 6px 10px;
	border-radius: 3px;
	}

	pre code, pre tt {
	background-color: transparent;
	border: none;
	}";
	}
	}
	<BindalbeMarkdownView
	android:id="@+id/MyWebContent"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:layout_marginLeft="10dp"
	android:layout_marginRight="10dp"
	android:layout_marginBottom="10dp"
	android:padding="10dp"
	android:textColor="@color/breathingroom_mediumgray"
	local:MvxBind="Markdown MyMarkdownProperty/>
	var myMarkdown = new BindableMarkdownView {
	TextColor = CustomUIColor.breathingroom_darkgray,
	BackgroundColor = UIColor.Clear,
	Lines = 0,
	Insets = new UIEdgeInsets(0, 5, 10, 5),
	};
	myMarkdown.Layer.CornerRadius = 3;
	myMarkdown.Layer.BorderColor = UIColor.Gray.CGColor;
	myMarkdown.Layer.BackgroundColor = UIColor.White.CGColor;

	var set = this.CreateBindingSet<SomeView, SomeViewModel>();

	set.Bind(myMarkdown).For(p => p.Markdown).To(vm => vm.MyMarkdownProperty);

	set.Apply();