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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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Copyright (C) 2001 Information-technology Promotion Agency (IPA)
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National Institute of Advanced Industrial Science and Technology (AIST)
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<html><head><meta http-equiv="Content-Type" content="text/html;charset="UTF-8">
<title>The m17n Library</title>
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<!-- Generated by Doxygen 1.3.9.1 -->
<h1>MDrawControl Struct Reference<br>
<small>
[<a class="el" href="group__m17nDraw.html">Drawing</a>]</small>
</h1>Type of a text drawing control.
<a href="#_details">More...</a>
<p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Data Fields</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o0">as_image</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o1">align_head</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o2">two_dimensional</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o3">orientation_reversed</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o4">enable_bidi</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o5">ignore_formatting_char</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o6">fixed_width</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o7">anti_alias</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o8">disable_overlapping_adjustment</a>: 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o9">min_line_ascent</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o10">min_line_descent</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o11">max_line_ascent</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o12">max_line_descent</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o13">max_line_width</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o14">tab_width</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o15">format</a> )(int line, int y, int *indent, int *width)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o16">line_break</a> )(<a class="el" href="group__m17nMtext.html#ga0">MText</a> *mt, int pos, int from, int to, int line, int y)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o17">with_cursor</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o18">cursor_pos</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o19">cursor_width</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o20">cursor_bidi</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o21">partial_update</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o22">disable_caching</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__m17nDraw.html#ga1">MDrawRegion</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structMDrawControl.html#o23">clip_region</a></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
The type <a class="el" href="structMDrawControl.html">MDrawControl</a> is the structure that controls how to draw an M-text.
<p>
<hr><h2>Field Documentation</h2>
<a class="anchor" name="o0" doxytag="MDrawControl::as_image"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o0">MDrawControl::as_image</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, draw an M-text as image, i.e. with background filled with background colors of faces put on the M-text. Otherwise, the background is not changed. </td>
</tr>
</table>
<a class="anchor" name="o1" doxytag="MDrawControl::align_head"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o1">MDrawControl::align_head</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero and the first glyph of each line has negative lbearing, shift glyphs horizontally to right so that no pixel is drawn to the left of the specified position. </td>
</tr>
</table>
<a class="anchor" name="o2" doxytag="MDrawControl::two_dimensional"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o2">MDrawControl::two_dimensional</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, draw an M-text two-dimensionally, i.e., newlines in M-text breaks lines and the following characters are drawn in the next line. If <format> is non-NULL, and the function returns nonzero line width, a line longer than that width is also broken. </td>
</tr>
</table>
<a class="anchor" name="o3" doxytag="MDrawControl::orientation_reversed"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o3">MDrawControl::orientation_reversed</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, draw an M-text to the right of a specified position. </td>
</tr>
</table>
<a class="anchor" name="o4" doxytag="MDrawControl::enable_bidi"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o4">MDrawControl::enable_bidi</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, reorder glyphs correctly for bidi text. </td>
</tr>
</table>
<a class="anchor" name="o5" doxytag="MDrawControl::ignore_formatting_char"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o5">MDrawControl::ignore_formatting_char</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, don't draw characters whose general category (in Unicode) is Cf (Other, format). </td>
</tr>
</table>
<a class="anchor" name="o6" doxytag="MDrawControl::fixed_width"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o6">MDrawControl::fixed_width</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, draw glyphs suitable for a terminal. Not yet implemented. </td>
</tr>
</table>
<a class="anchor" name="o7" doxytag="MDrawControl::anti_alias"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o7">MDrawControl::anti_alias</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, draw glyphs with anti-aliasing if a backend font driver supports it. </td>
</tr>
</table>
<a class="anchor" name="o8" doxytag="MDrawControl::disable_overlapping_adjustment"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned <a class="el" href="structMDrawControl.html#o8">MDrawControl::disable_overlapping_adjustment</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, disable the adjustment of glyph positions to avoid horizontal overlapping at font boundary. </td>
</tr>
</table>
<a class="anchor" name="o9" doxytag="MDrawControl::min_line_ascent"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned int <a class="el" href="structMDrawControl.html#o9">MDrawControl::min_line_ascent</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, the values are minimum line ascent and descent pixels. </td>
</tr>
</table>
<a class="anchor" name="o10" doxytag="MDrawControl::min_line_descent"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned int <a class="el" href="structMDrawControl.html#o10">MDrawControl::min_line_descent</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<a class="anchor" name="o11" doxytag="MDrawControl::max_line_ascent"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned int <a class="el" href="structMDrawControl.html#o11">MDrawControl::max_line_ascent</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, the values are maximum line ascent and descent pixels. </td>
</tr>
</table>
<a class="anchor" name="o12" doxytag="MDrawControl::max_line_descent"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned int <a class="el" href="structMDrawControl.html#o12">MDrawControl::max_line_descent</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<a class="anchor" name="o13" doxytag="MDrawControl::max_line_width"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned int <a class="el" href="structMDrawControl.html#o13">MDrawControl::max_line_width</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, the value specifies how many pixels each line can occupy on the display. The value zero means that there is no limit. It is ignored if <format> is non-NULL. </td>
</tr>
</table>
<a class="anchor" name="o14" doxytag="MDrawControl::tab_width"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">unsigned int <a class="el" href="structMDrawControl.html#o14">MDrawControl::tab_width</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, the value specifies the distance between tab stops in columns (the width of one column is the width of a space in the default font of the frame). The value zero means 8. </td>
</tr>
</table>
<a class="anchor" name="o15" doxytag="MDrawControl::format"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void(* <a class="el" href="structMDrawControl.html#o15">MDrawControl::format</a>)(int line, int y, int *indent, int *width) </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If non-NULL, the value is a function that calculates the indentation and width limit of each line based on the line number LINE and the coordinate Y. The function store the indentation and width limit at the place pointed by INDENT and WIDTH respectively.<p>
The indentation specifies how many pixels the first glyph of each line is shifted to the right (if the member <orientation_reversed> is zero) or to the left (otherwise). If the value is negative, each line is shifted to the reverse direction.<p>
The width limit specifies how many pixels each line can occupy on the display. The value 0 means that there is no limit.<p>
LINE and Y are reset to 0 when a line is broken by a newline character, and incremented each time when a long line is broken because of the width limit.<p>
This has an effect only when <two_dimensional> is nonzero. </td>
</tr>
</table>
<a class="anchor" name="o16" doxytag="MDrawControl::line_break"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int(* <a class="el" href="structMDrawControl.html#o16">MDrawControl::line_break</a>)(<a class="el" href="group__m17nMtext.html#ga0">MText</a> *mt, int pos, int from, int to, int line, int y) </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If non-NULL, the value is a function that calculates a line breaking position when a line is too long to fit within the width limit. POS is the position of the character next to the last one that fits within the limit. FROM is the position of the first character of the line, and TO is the position of the last character displayed on the line if there were not width limit. LINE and Y are the same as the arguments to <format>.<p>
The function must return a character position to break the line.<p>
The function should not modify MT.<p>
The <a class="el" href="group__m17nDraw.html#ga11">mdraw_default_line_break()</a> function is useful for such a script that uses SPACE as a word separator. </td>
</tr>
</table>
<a class="anchor" name="o17" doxytag="MDrawControl::with_cursor"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int <a class="el" href="structMDrawControl.html#o17">MDrawControl::with_cursor</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<a class="anchor" name="o18" doxytag="MDrawControl::cursor_pos"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int <a class="el" href="structMDrawControl.html#o18">MDrawControl::cursor_pos</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Specifies the character position to display a cursor. If it is greater than the maximum character position, the cursor is displayed next to the last character of an M-text. If the value is negative, even if <cursor_width> is nonzero, cursor is not displayed. </td>
</tr>
</table>
<a class="anchor" name="o19" doxytag="MDrawControl::cursor_width"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int <a class="el" href="structMDrawControl.html#o19">MDrawControl::cursor_width</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, display a cursor at the character position <cursor_pos>. If the value is positive, it is the pixel width of the cursor. If the value is negative, the cursor width is the same as the underlining glyph(s). </td>
</tr>
</table>
<a class="anchor" name="o20" doxytag="MDrawControl::cursor_bidi"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int <a class="el" href="structMDrawControl.html#o20">MDrawControl::cursor_bidi</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero and <cursor_width> is also nonzero, display double bar cursors; at the character position <cursor_pos> and at the logically previous character. Both cursors have one pixel width with horizontal fringes at upper or lower positions. </td>
</tr>
</table>
<a class="anchor" name="o21" doxytag="MDrawControl::partial_update"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int <a class="el" href="structMDrawControl.html#o21">MDrawControl::partial_update</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, on drawing partial text, pixels of surrounding texts that intrude into the drawing area are also drawn. For instance, some CVC sequence of Thai text (C is consonant, V is upper vowel) is drawn so that V is placed over the middle of two Cs. If this CVC sequence is already drawn and only the last C is drawn again (for instance by updating cursor position), the right half of V is erased if this member is zero. By setting this member to nonzero, even with such a drawing, we can keep this CVC sequence correctly displayed. </td>
</tr>
</table>
<a class="anchor" name="o22" doxytag="MDrawControl::disable_caching"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int <a class="el" href="structMDrawControl.html#o22">MDrawControl::disable_caching</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
If nonzero, don't cache the result of any drawing information of an M-text. </td>
</tr>
</table>
<a class="anchor" name="o23" doxytag="MDrawControl::clip_region"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"><a class="el" href="group__m17nDraw.html#ga1">MDrawRegion</a> <a class="el" href="structMDrawControl.html#o23">MDrawControl::clip_region</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
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