示例#1
0
        /// <summary>
        /// Renders the specified HTML source on the specified location and max size restriction.<br/>
        /// If <paramref name="maxSize"/>.Width is zero the html will use all the required width, otherwise it will perform line
        /// wrap as specified in the html<br/>
        /// If <paramref name="maxSize"/>.Height is zero the html will use all the required height, otherwise it will clip at the
        /// given max height not rendering the html below it.<br/>
        /// Returned is the actual width and height of the rendered html.<br/>
        /// </summary>
        /// <param name="g">Device to render with</param>
        /// <param name="html">HTML source to render</param>
        /// <param name="location">the top-left most location to start render the html at</param>
        /// <param name="maxSize">the max size of the rendered html (if height above zero it will be clipped)</param>
        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
        /// <param name="useGdiPlusTextRendering">true - use GDI+ text rendering, false - use GDI text rendering</param>
        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
        /// <returns>the actual size of the rendered html</returns>
        private static SizeF RenderHtml(Graphics g, string html, PointF location, SizeF maxSize, CssData cssData, bool useGdiPlusTextRendering, EventHandler <HtmlStylesheetLoadEventArgs> stylesheetLoad, EventHandler <HtmlImageLoadEventArgs> imageLoad)
        {
            SizeF actualSize = SizeF.Empty;

            if (!string.IsNullOrEmpty(html))
            {
                using (var container = new HtmlContainer())
                {
                    container.Location = location;
                    container.MaxSize  = maxSize;
                    container.AvoidAsyncImagesLoading = true;
                    container.AvoidImagesLateLoading  = true;
                    container.UseGdiPlusTextRendering = useGdiPlusTextRendering;

                    if (stylesheetLoad != null)
                    {
                        container.StylesheetLoad += stylesheetLoad;
                    }
                    if (imageLoad != null)
                    {
                        container.ImageLoad += imageLoad;
                    }

                    container.SetHtml(html, cssData);
                    container.PerformLayout(g);
                    container.PerformPaint(g);

                    actualSize = container.ActualSize;
                }
            }

            return(actualSize);
        }
示例#2
0
        /// <summary>
        /// Used to execute performance test run for memory profiler so the form is not loaded, 
        /// only html container is working.
        /// </summary>
        public static void Run(bool layout, bool paint)
        {
            try
            {
                LoadRunSamples();

                var htmlContainer = new HtmlContainer();
                htmlContainer.MaxSize = new SizeF(800, 0);

                GC.Collect();
                Thread.Sleep(3000);

                using (var img = new Bitmap(1, 1))
                using (var g = Graphics.FromImage(img))
                {
                    for (int i = 0; i < Iterations; i++)
                    {
                        foreach (var html in _perfTestSamples)
                        {
                            htmlContainer.SetHtml(html);

                            if (layout)
                                htmlContainer.PerformLayout(g);

                            if (paint)
                                htmlContainer.PerformPaint(g);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "Error");
            }
        }
示例#3
0
        /// <summary>
        /// On tooltip appear set the html by the associated control, layout and set the tooltip size by the html size.
        /// </summary>
        protected virtual void OnToolTipPopup(PopupEventArgs e)
        {
            //Create fragment container
            var cssClass   = string.IsNullOrEmpty(_tooltipCssClass) ? null : string.Format(" class=\"{0}\"", _tooltipCssClass);
            var toolipHtml = string.Format("<div{0}>{1}</div>", cssClass, GetToolTip(e.AssociatedControl));

            _htmlContainer.SetHtml(toolipHtml, _baseCssData);
            _htmlContainer.MaxSize = MaximumSize;

            //Measure size of the container
            using (var g = e.AssociatedControl.CreateGraphics())
            {
                g.TextRenderingHint = _textRenderingHint;
                _htmlContainer.PerformLayout(g);
            }

            //Set the size of the tooltip
            var desiredWidth  = (int)Math.Ceiling(MaximumSize.Width > 0 ? Math.Min(_htmlContainer.ActualSize.Width, MaximumSize.Width) : _htmlContainer.ActualSize.Width);
            var desiredHeight = (int)Math.Ceiling(MaximumSize.Height > 0 ? Math.Min(_htmlContainer.ActualSize.Height, MaximumSize.Height) : _htmlContainer.ActualSize.Height);

            e.ToolTipSize = new Size(desiredWidth, desiredHeight);

#if !MONO
            // start mouse handle timer
            if (_allowLinksHandling)
            {
                _associatedControl = e.AssociatedControl;
                _linkHandlingTimer.Start();
            }
#endif
        }
示例#4
0
        /// <summary>
        /// Renders the specified HTML into a new image of unknown size that will be determined by min/max width/height and HTML layout.<br/>
        /// If <paramref name="maxSize.Width"/> is zero the html will use all the required width, otherwise it will perform line
        /// wrap as specified in the html<br/>
        /// If <paramref name="maxSize.Height"/> is zero the html will use all the required height, otherwise it will clip at the
        /// given max height not rendering the html below it.<br/>
        /// If <paramref name="minSize"/> (Width/Height) is above zero the rendered image will not be smaller than the given min size.<br/>
        /// <p>
        /// Limitation: The image cannot have transparent background, by default it will be white.<br/>
        /// See "Rendering to image" remarks section on <see cref="HtmlRender"/>.<br/>
        /// </p>
        /// </summary>
        /// <param name="html">HTML source to render</param>
        /// <param name="minSize">optional: the min size of the rendered html (zero - not limit the width/height)</param>
        /// <param name="maxSize">optional: the max size of the rendered html, if not zero and html cannot be layout within the limit it will be clipped (zero - not limit the width/height)</param>
        /// <param name="backgroundColor">optional: the color to fill the image with (default - white)</param>
        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
        /// <returns>the generated image of the html</returns>
        /// <exception cref="ArgumentOutOfRangeException">if <paramref name="backgroundColor"/> is <see cref="Color.Transparent"/></exception>.
        public static Image RenderToImage(string html, Size minSize, Size maxSize, Color backgroundColor = new Color(), CssData cssData = null,
                                          EventHandler <HtmlStylesheetLoadEventArgs> stylesheetLoad      = null, EventHandler <HtmlImageLoadEventArgs> imageLoad = null)
        {
            if (backgroundColor == Color.Transparent)
            {
                throw new ArgumentOutOfRangeException("backgroundColor", "Transparent background in not supported");
            }

            if (string.IsNullOrEmpty(html))
            {
                return(new Bitmap(0, 0, PixelFormat.Format32bppArgb));
            }

            using (var container = new HtmlContainer())
            {
                container.AvoidAsyncImagesLoading = true;
                container.AvoidImagesLateLoading  = true;

                if (stylesheetLoad != null)
                {
                    container.StylesheetLoad += stylesheetLoad;
                }
                if (imageLoad != null)
                {
                    container.ImageLoad += imageLoad;
                }
                container.SetHtml(html, cssData);

                var finalSize = MeasureHtmlByRestrictions(container, minSize, maxSize);
                container.MaxSize = finalSize;

                // create the final image to render into by measured size
                var image = new Bitmap(finalSize.Width, finalSize.Height, PixelFormat.Format32bppArgb);

                // create memory buffer from desktop handle that supports alpha channel
                IntPtr dib;
                var    memoryHdc = Win32Utils.CreateMemoryHdc(IntPtr.Zero, image.Width, image.Height, out dib);
                try
                {
                    // render HTML into the memory buffer
                    using (var memoryGraphics = Graphics.FromHdc(memoryHdc))
                    {
                        memoryGraphics.Clear(backgroundColor != Color.Empty ? backgroundColor : Color.White);
                        container.PerformPaint(memoryGraphics);
                    }

                    // copy from memory buffer to image
                    CopyBufferToImage(memoryHdc, image);
                }
                finally
                {
                    Win32Utils.ReleaseMemoryHdc(memoryHdc, dib);
                }

                return(image);
            }
        }
示例#5
0
        /// <summary>
        /// Renders the specified HTML into a new image of unknown size that will be determined by min/max width/height and HTML layout.<br/>
        /// If <paramref name="maxSize.Width"/> is zero the html will use all the required width, otherwise it will perform line
        /// wrap as specified in the html<br/>
        /// If <paramref name="maxSize.Height"/> is zero the html will use all the required height, otherwise it will clip at the
        /// given max height not rendering the html below it.<br/>
        /// If <paramref name="minSize"/> (Width/Height) is above zero the rendered image will not be smaller than the given min size.<br/>
        /// The generated image have transparent background that the html is rendered on.<br/>
        /// GDI+ text rending can be controlled by providing <see cref="TextRenderingHint"/>.<br/>
        /// See "Rendering to image" remarks section on <see cref="HtmlRender"/>.<br/>
        /// </summary>
        /// <param name="html">HTML source to render</param>
        /// <param name="minSize">optional: the min size of the rendered html (zero - not limit the width/height)</param>
        /// <param name="maxSize">optional: the max size of the rendered html, if not zero and html cannot be layout within the limit it will be clipped (zero - not limit the width/height)</param>
        /// <param name="textRenderingHint">optional: (default - SingleBitPerPixelGridFit)</param>
        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
        /// <returns>the generated image of the html</returns>
        public static Image RenderToImageGdiPlus(string html, Size minSize, Size maxSize, TextRenderingHint textRenderingHint = TextRenderingHint.AntiAlias, CssData cssData = null,
                                                 EventHandler <HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler <HtmlImageLoadEventArgs> imageLoad           = null)
        {
            if (string.IsNullOrEmpty(html))
            {
                return(new Bitmap(0, 0, PixelFormat.Format32bppArgb));
            }

            using (var container = new HtmlContainer())
            {
                container.AvoidAsyncImagesLoading = true;
                container.AvoidImagesLateLoading  = true;
                container.UseGdiPlusTextRendering = true;

                if (stylesheetLoad != null)
                {
                    container.StylesheetLoad += stylesheetLoad;
                }
                if (imageLoad != null)
                {
                    container.ImageLoad += imageLoad;
                }
                container.SetHtml(html, cssData);

                var finalSize = MeasureHtmlByRestrictions(container, minSize, maxSize);
                container.MaxSize = finalSize;

                // create the final image to render into by measured size
                var image = new Bitmap(finalSize.Width, finalSize.Height, PixelFormat.Format32bppArgb);

                // render HTML into the image
                using (var g = Graphics.FromImage(image))
                {
                    g.TextRenderingHint = textRenderingHint;
                    container.PerformPaint(g);
                }

                return(image);
            }
        }
示例#6
0
        /// <summary>
        /// Renders the specified HTML source on the specified location and max size restriction.<br/>
        /// If <paramref name="maxSize"/>.Width is zero the html will use all the required width, otherwise it will perform line 
        /// wrap as specified in the html<br/>
        /// If <paramref name="maxSize"/>.Height is zero the html will use all the required height, otherwise it will clip at the
        /// given max height not rendering the html below it.<br/>
        /// Returned is the actual width and height of the rendered html.<br/>
        /// </summary>
        /// <param name="g">Device to render with</param>
        /// <param name="html">HTML source to render</param>
        /// <param name="location">the top-left most location to start render the html at</param>
        /// <param name="maxSize">the max size of the rendered html (if height above zero it will be clipped)</param>
        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
        /// <param name="useGdiPlusTextRendering">true - use GDI+ text rendering, false - use GDI text rendering</param>
        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
        /// <returns>the actual size of the rendered html</returns>
        private static SizeF RenderHtml(Graphics g, string html, PointF location, SizeF maxSize, CssData cssData, bool useGdiPlusTextRendering, EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad, EventHandler<HtmlImageLoadEventArgs> imageLoad)
        {
            SizeF actualSize = SizeF.Empty;

            if (!string.IsNullOrEmpty(html))
            {
                using (var container = new HtmlContainer())
                {
                    container.Location = location;
                    container.MaxSize = maxSize;
                    container.AvoidAsyncImagesLoading = true;
                    container.AvoidImagesLateLoading = true;
                    container.UseGdiPlusTextRendering = useGdiPlusTextRendering;

                    if (stylesheetLoad != null)
                        container.StylesheetLoad += stylesheetLoad;
                    if (imageLoad != null)
                        container.ImageLoad += imageLoad;

                    container.SetHtml(html, cssData);
                    container.PerformLayout(g);
                    container.PerformPaint(g);

                    actualSize = container.ActualSize;
                }
            }

            return actualSize;
        }
示例#7
0
        /// <summary>
        /// Renders the specified HTML into a new image of unknown size that will be determined by min/max width/height and HTML layout.<br/>
        /// If <paramref name="maxSize.Width"/> is zero the html will use all the required width, otherwise it will perform line 
        /// wrap as specified in the html<br/>
        /// If <paramref name="maxSize.Height"/> is zero the html will use all the required height, otherwise it will clip at the
        /// given max height not rendering the html below it.<br/>
        /// If <paramref name="minSize"/> (Width/Height) is above zero the rendered image will not be smaller than the given min size.<br/>
        /// The generated image have transparent background that the html is rendered on.<br/>
        /// GDI+ text rending can be controlled by providing <see cref="TextRenderingHint"/>.<br/>
        /// See "Rendering to image" remarks section on <see cref="HtmlRender"/>.<br/>
        /// </summary>
        /// <param name="html">HTML source to render</param>
        /// <param name="minSize">optional: the min size of the rendered html (zero - not limit the width/height)</param>
        /// <param name="maxSize">optional: the max size of the rendered html, if not zero and html cannot be layout within the limit it will be clipped (zero - not limit the width/height)</param>
        /// <param name="textRenderingHint">optional: (default - SingleBitPerPixelGridFit)</param>
        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
        /// <returns>the generated image of the html</returns>
        public static Image RenderToImageGdiPlus(string html, Size minSize, Size maxSize, TextRenderingHint textRenderingHint = TextRenderingHint.AntiAlias, CssData cssData = null,
            EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler<HtmlImageLoadEventArgs> imageLoad = null)
        {
            if (string.IsNullOrEmpty(html))
                return new Bitmap(0, 0, PixelFormat.Format32bppArgb);

            using (var container = new HtmlContainer())
            {
                container.AvoidAsyncImagesLoading = true;
                container.AvoidImagesLateLoading = true;
                container.UseGdiPlusTextRendering = true;

                if (stylesheetLoad != null)
                    container.StylesheetLoad += stylesheetLoad;
                if (imageLoad != null)
                    container.ImageLoad += imageLoad;
                container.SetHtml(html, cssData);

                var finalSize = MeasureHtmlByRestrictions(container, minSize, maxSize);
                container.MaxSize = finalSize;

                // create the final image to render into by measured size
                var image = new Bitmap(finalSize.Width, finalSize.Height, PixelFormat.Format32bppArgb);

                // render HTML into the image
                using (var g = Graphics.FromImage(image))
                {
                    g.TextRenderingHint = textRenderingHint;
                    container.PerformPaint(g);
                }

                return image;
            }
        }
示例#8
0
        /// <summary>
        /// Renders the specified HTML into a new image of unknown size that will be determined by min/max width/height and HTML layout.<br/>
        /// If <paramref name="maxSize.Width"/> is zero the html will use all the required width, otherwise it will perform line 
        /// wrap as specified in the html<br/>
        /// If <paramref name="maxSize.Height"/> is zero the html will use all the required height, otherwise it will clip at the
        /// given max height not rendering the html below it.<br/>
        /// If <paramref name="minSize"/> (Width/Height) is above zero the rendered image will not be smaller than the given min size.<br/>
        /// <p>
        /// Limitation: The image cannot have transparent background, by default it will be white.<br/>
        /// See "Rendering to image" remarks section on <see cref="HtmlRender"/>.<br/>
        /// </p>
        /// </summary>
        /// <param name="html">HTML source to render</param>
        /// <param name="minSize">optional: the min size of the rendered html (zero - not limit the width/height)</param>
        /// <param name="maxSize">optional: the max size of the rendered html, if not zero and html cannot be layout within the limit it will be clipped (zero - not limit the width/height)</param>
        /// <param name="backgroundColor">optional: the color to fill the image with (default - white)</param>
        /// <param name="cssData">optional: the style to use for html rendering (default - use W3 default style)</param>
        /// <param name="stylesheetLoad">optional: can be used to overwrite stylesheet resolution logic</param>
        /// <param name="imageLoad">optional: can be used to overwrite image resolution logic</param>
        /// <returns>the generated image of the html</returns>
        /// <exception cref="ArgumentOutOfRangeException">if <paramref name="backgroundColor"/> is <see cref="Color.Transparent"/></exception>.
        public static Image RenderToImage(string html, Size minSize, Size maxSize, Color backgroundColor = new Color(), CssData cssData = null,
            EventHandler<HtmlStylesheetLoadEventArgs> stylesheetLoad = null, EventHandler<HtmlImageLoadEventArgs> imageLoad = null)
        {
            if (backgroundColor == Color.Transparent)
                throw new ArgumentOutOfRangeException("backgroundColor", "Transparent background in not supported");

            if (string.IsNullOrEmpty(html))
                return new Bitmap(0, 0, PixelFormat.Format32bppArgb);

            using (var container = new HtmlContainer())
            {
                container.AvoidAsyncImagesLoading = true;
                container.AvoidImagesLateLoading = true;

                if (stylesheetLoad != null)
                    container.StylesheetLoad += stylesheetLoad;
                if (imageLoad != null)
                    container.ImageLoad += imageLoad;
                container.SetHtml(html, cssData);

                var finalSize = MeasureHtmlByRestrictions(container, minSize, maxSize);
                container.MaxSize = finalSize;

                // create the final image to render into by measured size
                var image = new Bitmap(finalSize.Width, finalSize.Height, PixelFormat.Format32bppArgb);

                // create memory buffer from desktop handle that supports alpha channel
                IntPtr dib;
                var memoryHdc = Win32Utils.CreateMemoryHdc(IntPtr.Zero, image.Width, image.Height, out dib);
                try
                {
                    // render HTML into the memory buffer
                    using (var memoryGraphics = Graphics.FromHdc(memoryHdc))
                    {
                        memoryGraphics.Clear(backgroundColor != Color.Empty ? backgroundColor : Color.White);
                        container.PerformPaint(memoryGraphics);
                    }

                    // copy from memory buffer to image
                    CopyBufferToImage(memoryHdc, image);
                }
                finally
                {
                    Win32Utils.ReleaseMemoryHdc(memoryHdc, dib);
                }

                return image;
            }
        }