| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <style> |
| 3 p { |
| 4 font:20px/1 Ahem; |
| 5 margin:.2em; |
| 6 } |
| 7 .vlr { |
| 8 -webkit-writing-mode:vertical-lr; |
| 9 } |
| 10 .vrl { |
| 11 -webkit-writing-mode:vertical-rl; |
| 12 } |
| 13 </style> |
| 14 <p title="LTR"><span>12 345 6789</span></p> |
| 15 <p title="RTL" dir=rtl><span>12 345 6789</span></p> |
| 16 <p title="VERTICAL-LR" class=vlr><span>12 345 6789</span></p> |
| 17 <p title="VERTICAL-RL" class=vrl><span>12 345 6789</span></p> |
| 18 <div id=log></div> |
| 19 <script> |
| 20 Array.prototype.forEach.call(document.querySelectorAll("p"), function (e) { |
| 21 testOffsetFromPoint(e.firstChild, e.title); |
| 22 e.style.textRendering = "optimizeLegibility"; |
| 23 testOffsetFromPoint(e.firstChild, e.title + " (Complex Path)"); |
| 24 }); |
| 25 |
| 26 function testOffsetFromPoint(element, name) { |
| 27 var writingMode = getComputedStyle(element).webkitWritingMode; |
| 28 var isVertical = writingMode && writingMode[0] == "v"; |
| 29 var results = [ name ]; |
| 30 getOffsetFromPoint(element, isVertical, results); |
| 31 if (isVertical) // The last character in vertical is flaky by win/mac/linux |
| 32 results.splice(-1, 1); |
| 33 for (var result of results) { |
| 34 var div = document.createElement("div"); |
| 35 div.innerText = result; |
| 36 log.appendChild(div); |
| 37 } |
| 38 } |
| 39 |
| 40 function getOffsetFromPoint(element, isVertical, results) { |
| 41 if (isVertical) { |
| 42 var x = element.offsetLeft + element.offsetWidth / 2; |
| 43 var ymin = element.offsetTop; |
| 44 var width = element.offsetHeight; |
| 45 } else { |
| 46 var y = element.offsetTop + element.offsetHeight / 2; |
| 47 var xmin = element.offsetLeft; |
| 48 width = element.offsetWidth; |
| 49 } |
| 50 var lastCharacterOffset = null; |
| 51 var lastPosition = null; |
| 52 for (var position = -1; position <= width + 1; ++position) { |
| 53 if (isVertical) |
| 54 y = ymin + position; |
| 55 else |
| 56 x = xmin + position; |
| 57 var result = document.caretRangeFromPoint(x, y); |
| 58 var characterOffset = result ? result.startOffset : null; |
| 59 if (characterOffset === lastCharacterOffset) |
| 60 continue; |
| 61 var advance = position - lastPosition; |
| 62 results.push(characterOffset + "=" + position + " (" + advance + ")"); |
| 63 lastCharacterOffset = characterOffset; |
| 64 lastPosition = position; |
| 65 } |
| 66 return results; |
| 67 } |
| 68 |
| 69 if (window.testRunner) |
| 70 testRunner.dumpAsText(); |
| 71 </script> |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1248453004:
Change Font::offsetForPositionForComplexText to use CachingWordShapeIterator (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master