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<div class="headertitle"><div class="title">src/ftxui/dom/size.cpp</div></div>
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<a href="src_2ftxui_2dom_2size_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2020 Arthur Sonzogni. All rights reserved.</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Use of this source code is governed by the MIT license that can be found in</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// the LICENSE file.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;algorithm&gt;</span> <span class="comment">// for min, max</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &lt;memory&gt;</span> <span class="comment">// for make_shared, __shared_ptr_access</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include &lt;utility&gt;</span> <span class="comment">// for move</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &quot;<a class="code" href="elements_8hpp.html">ftxui/dom/elements.hpp</a>&quot;</span> <span class="comment">// for Constraint, WidthOrHeight, EQUAL, GREATER_THAN, LESS_THAN, WIDTH, unpack, Decorator, Element, size</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &quot;<a class="code" href="node_8hpp.html">ftxui/dom/node.hpp</a>&quot;</span> <span class="comment">// for Node, Elements</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include &quot;<a class="code" href="requirement_8hpp.html">ftxui/dom/requirement.hpp</a>&quot;</span> <span class="comment">// for Requirement</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &quot;<a class="code" href="box_8hpp.html">ftxui/screen/box.hpp</a>&quot;</span> <span class="comment">// for Box</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a> {</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">namespace </span>{</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">class </span>Size : <span class="keyword">public</span> Node {</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> Size(<a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> child, <a class="code hl_enumeration" href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53">WidthOrHeight</a> direction, <a class="code hl_enumeration" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926">Constraint</a> constraint, <span class="keywordtype">int</span> value)</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> : Node(unpack(std::move(child))),</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> direction_(direction),</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> constraint_(constraint),</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <a class="code hl_variable" href="src_2ftxui_2dom_2separator_8cpp.html#ad84db3d1db4de4af9935d2d361626bdb">value_</a>(std::max(0, value)) {}</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="keywordtype">void</span> ComputeRequirement()<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <a class="code hl_function" href="group__dom.html#a40bd818c5de23bb2d208360d275ae59d">Node::ComputeRequirement</a>();</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> requirement_ = children_[0]-&gt;requirement();</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">auto</span>&amp; value = direction_ == <a class="code hl_enumvalue" href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53a73c0818986b7c462c2977f57afd00522">WIDTH</a> ? requirement_.min_x : requirement_.min_y;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="keywordflow">switch</span> (constraint_) {</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a41b05932cd237b2b133fff1ade85bed5">LESS_THAN</a>:</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> value = std::min(value, value_);</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a59a84258a4cb9025b567ee5139455029">EQUAL</a>:</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> value = <a class="code hl_variable" href="src_2ftxui_2dom_2separator_8cpp.html#ad84db3d1db4de4af9935d2d361626bdb">value_</a>;</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a5fae95457121bd697edd588d1b64cc7c">GREATER_THAN</a>:</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> value = std::max(value, value_);</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> }</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">if</span> (direction_ == <a class="code hl_enumvalue" href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53a73c0818986b7c462c2977f57afd00522">WIDTH</a>) {</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> requirement_.flex_grow_x = 0;</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> requirement_.flex_shrink_x = 0;</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> requirement_.flex_grow_y = 0;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> requirement_.flex_shrink_y = 0;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> }</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> }</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordtype">void</span> SetBox(Box box)<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <a class="code hl_function" href="group__dom.html#a2ed318aaadb07efc50e76fce1ccf9637">Node::SetBox</a>(box);</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">if</span> (direction_ == <a class="code hl_enumvalue" href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53a73c0818986b7c462c2977f57afd00522">WIDTH</a>) {</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keywordflow">switch</span> (constraint_) {</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a41b05932cd237b2b133fff1ade85bed5">LESS_THAN</a>:</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a59a84258a4cb9025b567ee5139455029">EQUAL</a>:</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> box.x_max = std::min(box.x_min + value_ + 1, box.x_max);</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a5fae95457121bd697edd588d1b64cc7c">GREATER_THAN</a>:</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> }</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">switch</span> (constraint_) {</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a41b05932cd237b2b133fff1ade85bed5">LESS_THAN</a>:</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a59a84258a4cb9025b567ee5139455029">EQUAL</a>:</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> box.y_max = std::min(box.y_min + value_ + 1, box.y_max);</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">case</span> <a class="code hl_enumvalue" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a5fae95457121bd697edd588d1b64cc7c">GREATER_THAN</a>:</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> }</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> }</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> children_[0]-&gt;SetBox(box);</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">private</span>:</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <a class="code hl_enumeration" href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53">WidthOrHeight</a> direction_;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <a class="code hl_enumeration" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926">Constraint</a> constraint_;</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordtype">int</span> <a class="code hl_variable" href="src_2ftxui_2dom_2separator_8cpp.html#ad84db3d1db4de4af9935d2d361626bdb">value_</a>;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span>};</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span>} <span class="comment">// namespace</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="comment"></span> </div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span><span class="comment">/// @brief Apply a constraint on the size of an element.</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span><span class="comment">/// @param direction Whether the WIDTH of the HEIGHT of the element must be</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="comment">/// constrained.</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span><span class="comment">/// @param constraint The type of constaint.</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span><span class="comment">/// @param value The value.</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span><span class="comment">/// @ingroup dom</span></div>
<div class="foldopen" id="foldopen00089" data-start="{" data-end="}">
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"><a class="line" href="group__dom.html#ga201220986fbdc539e42efe067985cbdb"> 89</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#a164021903e9ac6f1357e4186582891e3">Decorator</a> <a class="code hl_function" href="group__dom.html#ga201220986fbdc539e42efe067985cbdb">size</a>(<a class="code hl_enumeration" href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53">WidthOrHeight</a> direction, <a class="code hl_enumeration" href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926">Constraint</a> constraint, <span class="keywordtype">int</span> value) {</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keywordflow">return</span> [=](<a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> e) {</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <span class="keywordflow">return</span> std::make_shared&lt;Size&gt;(std::move(e), direction, constraint, value);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> };</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span>}</div>
</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span>} <span class="comment">// namespace ftxui</span></div>
<div class="ttc" id="abox_8hpp_html"><div class="ttname"><a href="box_8hpp.html">box.hpp</a></div></div>
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<div class="ttc" id="agroup__dom_html_a2ed318aaadb07efc50e76fce1ccf9637"><div class="ttname"><a href="group__dom.html#a2ed318aaadb07efc50e76fce1ccf9637">ftxui::Node::SetBox</a></div><div class="ttdeci">virtual void SetBox(Box box)</div><div class="ttdoc">Assign a position and a dimension to an element for drawing.</div><div class="ttdef"><b>Definition</b> <a href="node_8cpp_source.html#l00041">node.cpp:41</a></div></div>
<div class="ttc" id="agroup__dom_html_a40bd818c5de23bb2d208360d275ae59d"><div class="ttname"><a href="group__dom.html#a40bd818c5de23bb2d208360d275ae59d">ftxui::Node::ComputeRequirement</a></div><div class="ttdeci">virtual void ComputeRequirement()</div><div class="ttdoc">Compute how much space an element needs.</div><div class="ttdef"><b>Definition</b> <a href="node_8cpp_source.html#l00020">node.cpp:20</a></div></div>
<div class="ttc" id="agroup__dom_html_ga201220986fbdc539e42efe067985cbdb"><div class="ttname"><a href="group__dom.html#ga201220986fbdc539e42efe067985cbdb">ftxui::size</a></div><div class="ttdeci">Decorator size(WidthOrHeight, Constraint, int value)</div><div class="ttdoc">Apply a constraint on the size of an element.</div><div class="ttdef"><b>Definition</b> <a href="#l00089">src/ftxui/dom/size.cpp:89</a></div></div>
<div class="ttc" id="anamespaceftxui_html"><div class="ttname"><a href="namespaceftxui.html">ftxui</a></div><div class="ttdoc">The FTXUI ftxui:: namespace.</div><div class="ttdef"><b>Definition</b> <a href="animation_8hpp_source.html#l00010">animation.hpp:10</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a04711c04f28aabfa0e5928a35baaec53"><div class="ttname"><a href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53">ftxui::WidthOrHeight</a></div><div class="ttdeci">WidthOrHeight</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00161">elements.hpp:161</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a04711c04f28aabfa0e5928a35baaec53a73c0818986b7c462c2977f57afd00522"><div class="ttname"><a href="namespaceftxui.html#a04711c04f28aabfa0e5928a35baaec53a73c0818986b7c462c2977f57afd00522">ftxui::WIDTH</a></div><div class="ttdeci">@ WIDTH</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00161">elements.hpp:161</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a164021903e9ac6f1357e4186582891e3"><div class="ttname"><a href="namespaceftxui.html#a164021903e9ac6f1357e4186582891e3">ftxui::Decorator</a></div><div class="ttdeci">std::function&lt; Element(Element)&gt; Decorator</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00024">elements.hpp:24</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a2bc31f2d685189e5c61d2293a1f51b4f"><div class="ttname"><a href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">ftxui::Element</a></div><div class="ttdeci">std::shared_ptr&lt; Node &gt; Element</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00022">elements.hpp:22</a></div></div>
<div class="ttc" id="anamespaceftxui_html_ae09f44b989d381a387329fd0a0935926"><div class="ttname"><a href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926">ftxui::Constraint</a></div><div class="ttdeci">Constraint</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00162">elements.hpp:162</a></div></div>
<div class="ttc" id="anamespaceftxui_html_ae09f44b989d381a387329fd0a0935926a41b05932cd237b2b133fff1ade85bed5"><div class="ttname"><a href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a41b05932cd237b2b133fff1ade85bed5">ftxui::LESS_THAN</a></div><div class="ttdeci">@ LESS_THAN</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00162">elements.hpp:162</a></div></div>
<div class="ttc" id="anamespaceftxui_html_ae09f44b989d381a387329fd0a0935926a59a84258a4cb9025b567ee5139455029"><div class="ttname"><a href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a59a84258a4cb9025b567ee5139455029">ftxui::EQUAL</a></div><div class="ttdeci">@ EQUAL</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00162">elements.hpp:162</a></div></div>
<div class="ttc" id="anamespaceftxui_html_ae09f44b989d381a387329fd0a0935926a5fae95457121bd697edd588d1b64cc7c"><div class="ttname"><a href="namespaceftxui.html#ae09f44b989d381a387329fd0a0935926a5fae95457121bd697edd588d1b64cc7c">ftxui::GREATER_THAN</a></div><div class="ttdeci">@ GREATER_THAN</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00162">elements.hpp:162</a></div></div>
<div class="ttc" id="anode_8hpp_html"><div class="ttname"><a href="node_8hpp.html">node.hpp</a></div></div>
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<div class="ttc" id="asrc_2ftxui_2dom_2separator_8cpp_html_ad84db3d1db4de4af9935d2d361626bdb"><div class="ttname"><a href="src_2ftxui_2dom_2separator_8cpp.html#ad84db3d1db4de4af9935d2d361626bdb">value_</a></div><div class="ttdeci">std::string value_</div><div class="ttdef"><b>Definition</b> <a href="src_2ftxui_2dom_2separator_8cpp_source.html#l00051">src/ftxui/dom/separator.cpp:51</a></div></div>
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