/// <summary>
/// update the SVG DOM and the grid
/// </summary>
void UpdateData()
{
var alinks = svg.Descendants(ns + "a");
ALinksGrid.CellValueChanged -= ALinksGrid_CellValueChanged;
List <DataGridViewRow> toDelete = new List <DataGridViewRow>();
foreach (DataGridViewRow row in ALinksGrid.Rows)
{
XElement alink = svg.Descendants().First(el => (el.Attribute("id") != null) && (el.Attribute("id").Value == (string)row.Cells["ID"].Value));
if (alink.Name.LocalName != "a")
{
alink = alink.Parent;
}
if (alink == null)
{
throw new Exception(String.Format("Cannot find the <a> tag for the current row with href=\"{0}\"", row.Cells["id"].Value));
}
// delete <a> from SVG DOM if specified, including any <title> or <desc> in it
if ((bool)row.Cells["Delete"].Value)
{
XElement parent = alink.Parent;
alink.Remove();
foreach (XElement title in alink.Elements(ns + "title"))
{
title.Remove();
}
foreach (XElement desc in alink.Elements(ns + "desc"))
{
desc.Remove();
}
parent.Elements().ElementAt(alink.ElementsBeforeSelf().Count()).AddBeforeSelf(alink.Elements()); //add the <a>'s children back
toDelete.Add(row);
continue;
}
alink.Descendants(ns + "title").First().Value = (string)row.Cells["Title"].Value; // update <title>
alink.Descendants(ns + "desc").First().Value = (string)row.Cells["Desc"].Value; // update <desc>
alink.Attribute("tabindex").Value = (string)row.Cells["TabIndex"].Value; // update tabindex="#"
}
// remove deleted links from the grid
ALinksGrid.Visible = false;
foreach (var row in toDelete)
{
ALinksGrid.Rows.Remove(row);
}
ALinksGrid.Refresh();
ALinksGrid.Visible = true;
ALinksGrid.CellValueChanged += ALinksGrid_CellValueChanged;
}
/// <summary>
/// open an SVG file, process it, and populate the grid
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ButtonOpen_Click(object sender, EventArgs e)
{
// Check if current file is dirty
if (isGridDirty)
{
if (MessageBox.Show("You have unsaved changes in the current SVG file. If you click OK, any unsaved changes will be discarded",
"Unsaved Changes",
MessageBoxButtons.OKCancel) != DialogResult.OK)
{
return;
}
}
ALinksGrid.Visible = false;
// Open file
OpenFileDialog openFile1 = new OpenFileDialog();
openFile1.Filter = "SVG Files|*.svg";
if (openFile1.ShowDialog() != DialogResult.OK || openFile1.FileName == "")
{
return;
}
svg = XDocument.Load(openFile1.FileName);
// Process SVG DOM and populate the grid
if (!svg.Root.Element(ns + "style").Value.Contains(".hover_group"))
{
svg.Root.Element(ns + "style").Value += hoverText;
}
ALinksGrid.AutoGenerateColumns = false;
ALinksGrid.Rows.Clear();
foreach (XElement alink in svg.Descendants(ns + "a"))
{
alink.SetAttributeValue("cursor", "pointer"); // set cursor="pointer"
alink.SetAttributeValue("target", "_blank"); // set target="_blank"
if (alink.Attribute("tabindex") == null) // set tabindex="0" if not exist
{
alink.SetAttributeValue("tabindex", "0");
}
// set class="hover_group" for all groups with <a> as immediate parent
foreach (XElement group in alink.Elements(ns + "g"))
{
XAttribute attr = group.Attribute("class");
if (attr != null)
{
attr.Value = "hover_group;" + attr.Value;
}
else
{
group.SetAttributeValue("class", "hover_group");
}
}
// create <title> if not exist in decendents
XElement title = null;
if (alink.Descendants(ns + "title").Count() > 0)
{
title = alink.Descendants(ns + "title").First();
}
if (title == null)
{
title = new XElement(ns + "title", "");
alink.Add(title);
}
// create <desc> if not exist in descendents
XElement desc = null;
if (alink.Descendants(ns + "desc").Count() > 0)
{
desc = alink.Descendants(ns + "desc").First();
}
if (desc == null)
{
desc = new XElement(ns + "desc", "");
alink.Add(desc);
}
// add ids for <title> and <desc> if not exist
string titleid, descid;
if (title.Attribute("id") == null)
{
titleid = GenerateId();
title.SetAttributeValue("id", titleid);
}
else
{
titleid = title.Attribute("id").Value;
}
if (desc.Attribute("id") == null)
{
descid = GenerateId();
desc.SetAttributeValue("id", descid);
}
else
{
descid = desc.Attribute("id").Value;
}
alink.SetAttributeValue("aria-labelledby", titleid + " " + descid); // set aria-labelledby="[titleid] [descid]"
// create a new row for the link in the grid
ALinksGrid.Rows.Add(
alink.DescendantsAndSelf().First(el => el.Attribute("id") != null).Attribute("id").Value, // id
alink.Attribute(xlink + "href").Value, // href
alink.Descendants(ns + "title").First().Value, // title
alink.Descendants(ns + "desc").First().Value, // desc
alink.Attribute("tabindex").Value, // tabindex
alink.Ancestors(ns + "a").Count() > 0 ? true : false, // nested?
false); // delete link? (no by default)
}
ALinksGrid.Refresh();
ALinksGrid.ColumnHeadersVisible = true;
ALinksGrid.Visible = true;
ALinksGrid.CellValueChanged += ALinksGrid_CellValueChanged;
currentFile = openFile1.FileName;
ButtonSave.Enabled = true;
ButtonSaveAs.Enabled = true;
this.Text = String.Format("{0} - {1}", formTitle, currentFile);
isGridDirty = true;
}
