mirror of
https://github.com/xcp-ng/xenadmin.git
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244 lines
9.4 KiB
C#
244 lines
9.4 KiB
C#
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/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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*
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* Based loosely upon code copyrighted as below.
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*
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*/
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/*
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*
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Copyright (c) 2008, TeX HeX (http://www.texhex.info/)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
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* Neither the name of the Xteq Systems (http://www.xteq.com/) nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Original idea and code (3 lines :-) by Benjamin Hollis: http://brh.numbera.com/blog/index.php/2007/04/11/setting-the-correct-default-font-in-net-windows-forms-apps/
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*/
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Windows.Forms;
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namespace XenAdmin.Core
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{
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public static class FormFontFixer
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{
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[AttributeUsage(AttributeTargets.Class)]
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public class PreserveFonts : Attribute
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{
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public bool Preserve;
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public PreserveFonts(bool preserve)
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{
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Preserve = preserve;
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}
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}
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//This list contains the fonts we want to replace.
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private static readonly List<string> FontReplaceList
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= new List<string>(new[] {"Microsoft Sans Serif", "Tahoma", "Verdana", "Segoe UI", "Meiryo", "Meiryo UI", "MS UI Gothic", "Arial", "\u5b8b\u4f53"});
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/// <summary>
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/// May be null, implying that the fonts cannot be fixed.
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/// </summary>
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public static Font DefaultFont;
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static FormFontFixer()
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{
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//Basically the font name we want to use should be easy to choose by using the SystemFonts class. However, this class
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//is hard-coded (!!) and doesn't seem to work right. On XP, it will mostly return "Microsoft Sans Serif" except
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//for the DialogFont property (=Tahoma) but on Vista, this class will return "Tahoma" instead of "SegoeUI" for this property!
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//Therefore we will do the following: If we are running on a OS below XP, we will exit because the only font available
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//will be MS Sans Serif. On XP, we gonna use "Tahoma", and any other OS we will use the value of the MessageBoxFont
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//property because this seems to be set correctly on Vista an above.
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DefaultFont =
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Environment.OSVersion.Platform == PlatformID.Win32Windows || Environment.OSVersion.Version.Major < 5 ?
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null : // 95, 98, and NT can't be fixed.
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Environment.OSVersion.Version.Major < 6 ?
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SystemFonts.DialogFont : // 2K (5.0), XP (5.1), 2K3 and XP Pro (5.2), using Tahoma by default
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SystemFonts.MessageBoxFont; // Vista and above, using SegoeUI by default
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}
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public static void Fix(Form form)
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{
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if (DefaultFont == null)
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return;
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RegisterAndReplace(form);
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}
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private static void RegisterAndReplace(Control c)
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{
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if (ShouldPreserveFonts(c))
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return;
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if (c is ToolStrip)
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{
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ToolStrip t = (ToolStrip)c;
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Register(t);
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Replace(t);
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foreach (ToolStripItem d in t.Items)
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Replace(d);
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}
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else
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{
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Register(c);
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Replace(c);
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foreach (Control d in c.Controls)
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RegisterAndReplace(d);
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}
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}
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private static bool ShouldPreserveFonts(Control c)
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{
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Type t = c.GetType();
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object [] arr = t.GetCustomAttributes(typeof(PreserveFonts), true);
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return arr.Length > 0 && ((PreserveFonts)arr[0]).Preserve;
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}
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private static void Deregister(Control c)
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{
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c.ControlAdded -= c_ControlAdded;
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c.ControlRemoved -= c_ControlRemoved;
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foreach (Control d in c.Controls)
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Deregister(d);
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}
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private static void Deregister(ToolStrip c)
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{
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c.ItemAdded -= c_ItemAdded;
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}
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private static void Register(Control c)
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{
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if (!IsLeaf(c))
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{
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c.ControlAdded -= c_ControlAdded;
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c.ControlAdded += c_ControlAdded;
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c.ControlRemoved -= c_ControlRemoved;
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c.ControlRemoved += c_ControlRemoved;
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}
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}
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private static void Register(ToolStrip c)
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{
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c.ItemAdded -= c_ItemAdded;
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c.ItemAdded += c_ItemAdded;
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}
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static void c_ControlAdded(object sender, ControlEventArgs e)
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{
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RegisterAndReplace(e.Control);
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}
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static void c_ControlRemoved(object sender, ControlEventArgs e)
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{
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Deregister(e.Control);
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}
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static void c_ItemAdded(object sender, ToolStripItemEventArgs e)
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{
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Replace(e.Item);
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}
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private static bool IsLeaf(Control c)
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{
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return c is Button || c is Label || c is TextBox || c is ComboBox || c is ListBox;
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}
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private static void Replace(Control c)
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{
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c.Font = ReplacedFont(c.Font);
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}
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private static void Replace(ToolStripItem c)
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{
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c.Font = ReplacedFont(c.Font);
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}
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private static Font ReplacedFont(Font f)
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{
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//only replace fonts that use one the "system fonts" we have declared
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if (FontReplaceList.IndexOf(f.Name) > -1)
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{
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//Now check the size, when the size is 9 or below it's the default font size and we do not keep the size since
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//SegoeUI has a complete different spacing (and thus size) than MS SansS or Tahoma.
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//Also check if there are any styles applied on the font (e.g. Italic) which we need to apply to the new
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//font as well.
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bool UseDefaultSize = f.Size >= 8 && f.Size <= 9;
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bool UseDefaultStyle = !f.Italic && !f.Strikeout && !f.Underline && !f.Bold;
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//if everything is set to defaults, we can use our prepared font right away
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if (UseDefaultSize && UseDefaultStyle)
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{
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return DefaultFont;
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}
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else
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{
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//There are non default properties set so
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//there is some work we need to do...
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return new Font(DefaultFont.FontFamily, UseDefaultSize ? DefaultFont.SizeInPoints : f.SizeInPoints, f.Style);
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}
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}
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else
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{
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return f;
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}
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}
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}
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}
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