css/css-backgrounds/border-image-repeat-space-10-ref.html

<!doctype html>
<html>
<title>Reference: border-image-repeat:space</title>
<link rel="author" title="Mats Palmgren" href="mailto:mats@mozilla.com">

<style>
  body > div { position: relative; margin-bottom: calc(27px * 2); }
  body > div > div {
    position: absolute;
    width: 27px;
    height: 27px;
    background-image: url("support/border.png");
  }

  .outer1 { width: 26px; height: 26px; }
  .outer2 { width: 53px; height: 53px; }
  .outer3 { width: 70px; height: 70px; }

  .outer1 > .inner2, .outer1 > .inner4, .outer1 > .inner5, .outer1 > .inner7,
  .outer2 > .inner2, .outer2 > .inner4, .outer2 > .inner5, .outer2 > .inner7,
  .outer3 > .inner2, .outer3 > .inner3, .outer3 > .inner5, .outer3 > .inner6,
  .outer3 > .inner7, .outer3 > .inner8, .outer3 > .inner10, .outer3 > .inner11 {
    background-position: -27px 0px;
  }

  /*
  This mocks up the drawing algorithm for border-image, by hand,
  with an absolutely-positioned innerN div for each tile of a border
  image component. And the components are positioned using calc()
  expressions that involve: the border's thickness, the element's
  content-box size, and the expected number of tiled repetitions
  (e.g. 2) and gaps-between-repetitions (e.g. 3).
  */

  .outer1 > .inner3, .outer1 > .inner8 { left: calc(27px + 26px); }
  .outer1 > .inner6, .outer1 > .inner8 { top: calc(27px + 26px); }

  .outer2 > .inner3, .outer2 > .inner5, .outer2 > .inner8 { left: calc(27px + 53px); }
  .outer2 > .inner2, .outer2 > .inner7 { left: calc(27px + ((53px - 27px) / 2)); }
  .outer2 > .inner4, .outer2 > .inner5 { top: calc(27px + ((53px - 27px) / 2)); }
  .outer2 > .inner6, .outer2 > .inner7, .outer2 > .inner8 { top: calc(27px + 53px); }

  .outer3 > .inner4, .outer3 > .inner6, .outer3 > .inner8, .outer3 > .inner12 { left: calc(27px + 70px); }
  .outer3 > .inner2, .outer3 > .inner10 { left: calc(27px + ((70px - (27px * 2)) / 3)); }
  .outer3 > .inner3, .outer3 > .inner11 { left: calc(70px - ((70px - (27px * 2)) / 3)); }
  .outer3 > .inner5, .outer3 > .inner6 { top: calc(27px + ((70px - (27px * 2)) / 3)); }
  .outer3 > .inner7, .outer3 > .inner8 { top: calc(70px - ((70px - (27px * 2)) / 3)); }
  .outer3 > .inner9, .outer3 > .inner10, .outer3 > .inner11, .outer3 > .inner12 { top: calc(27px + 70px); }

</style>

<div class="outer1">
  <div class="inner1"></div>
  <div class="inner3"></div>
  <div class="inner6"></div>
  <div class="inner8"></div>
</div>
<div class="outer2">
  <div class="inner1"></div>
  <div class="inner2"></div>
  <div class="inner3"></div>
  <div class="inner4"></div>
  <div class="inner5"></div>
  <div class="inner6"></div>
  <div class="inner7"></div>
  <div class="inner8"></div>
</div>

<div class="outer3">
  <div class="inner1"></div>
  <div class="inner2"></div>
  <div class="inner3"></div>
  <div class="inner4"></div>
  <div class="inner5"></div>
  <div class="inner6"></div>
  <div class="inner7"></div>
  <div class="inner8"></div>
  <div class="inner9"></div>
  <div class="inner10"></div>
  <div class="inner11"></div>
  <div class="inner12"></div>
</div>

</html>