C# CssBox.InheritStyle方法代码示例

        /// <summary>
        /// Applies style to all boxes in the tree.<br/>
        /// If the html tag has style defined for each apply that style to the css box of the tag.<br/>
        /// If the html tag has "class" attribute and the class name has style defined apply that style on the tag css box.<br/>
        /// If the html tag has "style" attribute parse it and apply the parsed style on the tag css box.<br/>
        /// If the html tag is "style" tag parse it content and add to the css data for all future tags parsing.<br/>
        /// If the html tag is "link" that point to style data parse it content and add to the css data for all future tags parsing.<br/>
        /// </summary>
        /// <param name="box"></param>
        /// <param name="bridge"> </param>
        /// <param name="cssData"> </param>
        /// <param name="cssDataChanged">check if the css data has been modified by the handled html not to change the base css data</param>
        private static void CascadeStyles(CssBox box, object bridge, ref CssData cssData, ref bool cssDataChanged)
        {
            box.InheritStyle();

            if (box.HtmlTag != null)
            {
                // try assign style using the html element tag
                AssignCssBlocks(box, cssData, box.HtmlTag.Name);

                // try assign style using the "class" attribute of the html element
                if (box.HtmlTag.HasAttribute("class"))
                {
                    AssignCssBlocks(box, cssData, "." + box.HtmlTag.Attributes["class"]);
                    AssignCssBlocks(box, cssData, box.HtmlTag.Name + "." + box.HtmlTag.Attributes["class"]);
                }

                // try assign style using the "id" attribute of the html element
                if (box.HtmlTag.HasAttribute("id"))
                {
                    AssignCssBlocks(box, cssData, "#" + box.HtmlTag.Attributes["id"]);
                }

                HtmlParser.TranslateAttributes(box.HtmlTag, box);

                // Check for the style="" attribute
                if (box.HtmlTag.HasAttribute("style"))
                {
                    var block = CssParser.ParseCssBlockImp(box.HtmlTag.Name, box.HtmlTag.Attributes["style"]);
                    AssignCssBlock(box, block);
                }

                // Check for the <style> tag
                if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count == 1)
                {
                    CloneCssData(ref cssData, ref cssDataChanged);
                    CssParser.ParseStyleSheet(cssData, box.Boxes[0].Text);
                }

                // Check for the <link rel=stylesheet> tag
                if (box.HtmlTag.Name.Equals("link", StringComparison.CurrentCultureIgnoreCase) &&
                    box.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase))
                {
                    CloneCssData(ref cssData, ref cssDataChanged);
                    var styleSheet = CssValueParser.GetStyleSheet(box.GetAttribute("href", string.Empty), bridge);
                    CssParser.ParseStyleSheet(cssData, styleSheet);
                }
            }

            foreach (var childBox in box.Boxes)
            {
                CascadeStyles(childBox, bridge, ref cssData, ref cssDataChanged);
            }
        }

        /// <summary>
        /// Creates the <see cref="ListItemBox"/>
        /// </summary>
        /// <param name="g"></param>
        private void CreateListItemBox(Graphics g)
        {
            if (Display == CssConstants.ListItem)
            {
                if (_listItemBox == null)
                {
                    _listItemBox = new CssBox();
                    _listItemBox.InheritStyle(this, false);
                    _listItemBox.Display = CssConstants.Inline;
                    _listItemBox._htmlContainer = HtmlContainer;

                    if (ParentBox != null && ListStyleType == CssConstants.Decimal)
                    {
                        _listItemBox.Text = GetIndexForList() + ".";
                    }
                    else
                    {
                        _listItemBox.Text = "•";
                    }

                    _listItemBox.MeasureBoundsImp(g);
                    _listItemBox.Size = new SizeF(_listItemBox.Words[0].Width, _listItemBox.Words[0].Height);
                }
                _listItemBox.Words[0].Left = Location.X - _listItemBox.Size.Width - 5;
                _listItemBox.Words[0].Top = Location.Y + ActualPaddingTop;// +FontAscent;
            }
        }

        /// <summary>
        /// Applies style to all boxes in the tree.<br/>
        /// If the html tag has style defined for each apply that style to the css box of the tag.<br/>
        /// If the html tag has "class" attribute and the class name has style defined apply that style on the tag css box.<br/>
        /// If the html tag has "style" attribute parse it and apply the parsed style on the tag css box.<br/>
        /// If the html tag is "style" tag parse it content and add to the css data for all future tags parsing.<br/>
        /// If the html tag is "link" that point to style data parse it content and add to the css data for all future tags parsing.<br/>
        /// </summary>
        /// <param name="box"></param>
        /// <param name="htmlContainer">the html container to use for reference resolve</param>
        /// <param name="cssData"> </param>
        /// <param name="cssDataChanged">check if the css data has been modified by the handled html not to change the base css data</param>
        private static void CascadeStyles(CssBox box, HtmlContainer htmlContainer, ref CssData cssData, ref bool cssDataChanged)
        {
            box.InheritStyle();

            if (box.HtmlTag != null)
            {
                // try assign style using the html element tag
                AssignCssBlocks(box, cssData, box.HtmlTag.Name);

                // try assign style using the "class" attribute of the html element
                if (box.HtmlTag.HasAttribute("class"))
                {
                    AssignClassCssBlocks(box, cssData);
                }

                // try assign style using the "id" attribute of the html element
                if (box.HtmlTag.HasAttribute("id"))
                {
                    var id = box.HtmlTag.TryGetAttribute("id");
                    AssignCssBlocks(box, cssData, "#" + id);
                }

                TranslateAttributes(box.HtmlTag, box);

                // Check for the style="" attribute
                if (box.HtmlTag.HasAttribute("style"))
                {
                    var block = CssParser.ParseCssBlock(box.HtmlTag.Name, box.HtmlTag.TryGetAttribute("style"));
                    AssignCssBlock(box, block);
                }

                // Check for the <style> tag
                if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count == 1)
                {
                    CloneCssData(ref cssData, ref cssDataChanged);
                    CssParser.ParseStyleSheet(cssData, box.Boxes[0].Text.CutSubstring());
                }

                // Check for the <link rel=stylesheet> tag
                if (box.HtmlTag.Name.Equals("link", StringComparison.CurrentCultureIgnoreCase) &&
                    box.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase))
                {
                    CloneCssData(ref cssData, ref cssDataChanged);
                    var styleSheet = StylesheetLoadHelper.LoadStylesheet(htmlContainer, box.GetAttribute("href", string.Empty), box.HtmlTag.Attributes);
                    CssParser.ParseStyleSheet(cssData, styleSheet);
                }
            }

            // cascade text decoration only to boxes that actually have text so it will be handled correctly.
            if (box.TextDecoration != String.Empty && box.Text == null)
            {
                foreach (var childBox in box.Boxes)
                    childBox.TextDecoration = box.TextDecoration;
                box.TextDecoration = string.Empty;
            }

            foreach (var childBox in box.Boxes)
            {
                CascadeStyles(childBox, htmlContainer, ref cssData, ref cssDataChanged);
            }
        }

        /// <summary>
        /// Create new css box for the given parent with the given optional html tag and insert it either
        /// at the end or before the given optional box.<br/>
        /// If no html tag is given the box will be anonymous.<br/>
        /// If no before box is given the new box will be added at the end of parent boxes collection.<br/>
        /// If before box doesn't exists in parent box exception is thrown.<br/>
        /// </summary>
        /// <remarks>
        /// To learn more about anonymous inline boxes visit: http://www.w3.org/TR/CSS21/visuren.html#anonymous
        /// </remarks>
        /// <param name="parent">the box to add the new box to it as child</param>
        /// <param name="tag">optional: the html tag to define the box</param>
        /// <param name="before">optional: to insert as specific location in parent box</param>
        /// <returns>the new box</returns>
        public static CssBox CreateBox(CssBox parent, HtmlTag tag = null, CssBox before = null)
        {
            ArgChecker.AssertArgNotNull(parent, "parent");

            var newBox =  new CssBox(parent, tag);
            newBox.InheritStyle();
            if (before != null)
            {
                newBox.SetBeforeBox(before);
            }
            return newBox;
        }

        /// <summary>
        /// Creates the <see cref="_listItemBox"/>
        /// </summary>
        /// <param name="g"></param>
        private void CreateListItemBox(IGraphics g)
        {
            if (Display == CssConstants.ListItem && ListStyleType != CssConstants.None)
            {
                if (_listItemBox == null)
                {
                    _listItemBox = new CssBox(null, null);
                    _listItemBox.InheritStyle(this);
                    _listItemBox.Display = CssConstants.Inline;
                    _listItemBox._htmlContainer = HtmlContainer;

                    if (ListStyleType.Equals(CssConstants.Disc, StringComparison.InvariantCultureIgnoreCase))
                    {
                        _listItemBox.Text = new SubString("•");
                    }
                    else if (ListStyleType.Equals(CssConstants.Circle, StringComparison.InvariantCultureIgnoreCase))
                    {
                        _listItemBox.Text = new SubString("o");
                    }
                    else if (ListStyleType.Equals(CssConstants.Square, StringComparison.InvariantCultureIgnoreCase))
                    {
                        _listItemBox.Text = new SubString("♠");
                    }
                    else if (ListStyleType.Equals(CssConstants.Decimal, StringComparison.InvariantCultureIgnoreCase))
                    {
                        _listItemBox.Text = new SubString(GetIndexForList().ToString(CultureInfo.InvariantCulture) + ".");
                    }
                    else if (ListStyleType.Equals(CssConstants.DecimalLeadingZero, StringComparison.InvariantCultureIgnoreCase))
                    {
                        _listItemBox.Text = new SubString(GetIndexForList().ToString("00", CultureInfo.InvariantCulture) + ".");
                    }
                    else
                    {
                        _listItemBox.Text = new SubString(CommonUtils.ConvertToAlphaNumber(GetIndexForList(), ListStyleType) + ".");
                    }

                    _listItemBox.ParseToWords();

                    _listItemBox.PerformLayoutImp(g);
                    _listItemBox.Size = new SizeF(_listItemBox.Words[0].Width, _listItemBox.Words[0].Height);
                }
                _listItemBox.Words[0].Left = Location.X - _listItemBox.Size.Width - 5;
                _listItemBox.Words[0].Top = Location.Y + ActualPaddingTop;// +FontAscent;
            }
        }