gfx/thebes/gfxSkipChars.cpp@6474c204b198 (annotated)
gfx/thebes/gfxSkipChars.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| michael@0 | 2 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "gfxSkipChars.h" |
| michael@0 | 7 | |
| michael@0 | 8 | void |
| michael@0 | 9 | gfxSkipCharsIterator::SetOriginalOffset(int32_t aOffset) |
| michael@0 | 10 | { |
| michael@0 | 11 | aOffset += mOriginalStringToSkipCharsOffset; |
| michael@0 | 12 | NS_ASSERTION(uint32_t(aOffset) <= mSkipChars->mCharCount, |
| michael@0 | 13 | "Invalid offset"); |
| michael@0 | 14 | |
| michael@0 | 15 | mOriginalStringOffset = aOffset; |
| michael@0 | 16 | |
| michael@0 | 17 | uint32_t rangeCount = mSkipChars->mRanges.Length(); |
| michael@0 | 18 | if (rangeCount == 0) { |
| michael@0 | 19 | mSkippedStringOffset = aOffset; |
| michael@0 | 20 | return; |
| michael@0 | 21 | } |
| michael@0 | 22 | |
| michael@0 | 23 | // at start of string? |
| michael@0 | 24 | if (aOffset == 0) { |
| michael@0 | 25 | mSkippedStringOffset = 0; |
| michael@0 | 26 | mCurrentRangeIndex = |
| michael@0 | 27 | rangeCount && mSkipChars->mRanges[0].Start() == 0 ? 0 : -1; |
| michael@0 | 28 | return; |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | // find the range that includes or precedes aOffset |
| michael@0 | 32 | uint32_t lo = 0, hi = rangeCount; |
| michael@0 | 33 | const gfxSkipChars::SkippedRange* ranges = mSkipChars->mRanges.Elements(); |
| michael@0 | 34 | while (lo < hi) { |
| michael@0 | 35 | uint32_t mid = (lo + hi) / 2; |
| michael@0 | 36 | if (uint32_t(aOffset) < ranges[mid].Start()) { |
| michael@0 | 37 | hi = mid; |
| michael@0 | 38 | } else { |
| michael@0 | 39 | lo = mid + 1; |
| michael@0 | 40 | } |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | if (lo == rangeCount) { |
| michael@0 | 44 | mCurrentRangeIndex = rangeCount - 1; |
| michael@0 | 45 | } else if (uint32_t(aOffset) < ranges[lo].Start()) { |
| michael@0 | 46 | mCurrentRangeIndex = lo - 1; |
| michael@0 | 47 | if (mCurrentRangeIndex == -1) { |
| michael@0 | 48 | mSkippedStringOffset = aOffset; |
| michael@0 | 49 | return; |
| michael@0 | 50 | } |
| michael@0 | 51 | } else { |
| michael@0 | 52 | mCurrentRangeIndex = lo; |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | const gfxSkipChars::SkippedRange& r = ranges[mCurrentRangeIndex]; |
| michael@0 | 56 | if (uint32_t(aOffset) < r.End()) { |
| michael@0 | 57 | mSkippedStringOffset = r.SkippedOffset(); |
| michael@0 | 58 | return; |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | mSkippedStringOffset = aOffset - r.NextDelta(); |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | void |
| michael@0 | 65 | gfxSkipCharsIterator::SetSkippedOffset(uint32_t aOffset) |
| michael@0 | 66 | { |
| michael@0 | 67 | NS_ASSERTION((mSkipChars->mRanges.IsEmpty() && |
| michael@0 | 68 | aOffset <= mSkipChars->mCharCount) || |
| michael@0 | 69 | (aOffset <= mSkipChars->LastRange().SkippedOffset() + |
| michael@0 | 70 | mSkipChars->mCharCount - |
| michael@0 | 71 | mSkipChars->LastRange().End()), |
| michael@0 | 72 | "Invalid skipped offset"); |
| michael@0 | 73 | mSkippedStringOffset = aOffset; |
| michael@0 | 74 | |
| michael@0 | 75 | uint32_t rangeCount = mSkipChars->mRanges.Length(); |
| michael@0 | 76 | if (rangeCount == 0) { |
| michael@0 | 77 | mOriginalStringOffset = aOffset; |
| michael@0 | 78 | return; |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | uint32_t lo = 0, hi = rangeCount; |
| michael@0 | 82 | const gfxSkipChars::SkippedRange* ranges = mSkipChars->mRanges.Elements(); |
| michael@0 | 83 | while (lo < hi) { |
| michael@0 | 84 | uint32_t mid = (lo + hi) / 2; |
| michael@0 | 85 | if (aOffset < ranges[mid].SkippedOffset()) { |
| michael@0 | 86 | hi = mid; |
| michael@0 | 87 | } else { |
| michael@0 | 88 | lo = mid + 1; |
| michael@0 | 89 | } |
| michael@0 | 90 | } |
| michael@0 | 91 | |
| michael@0 | 92 | if (lo == rangeCount) { |
| michael@0 | 93 | mCurrentRangeIndex = rangeCount - 1; |
| michael@0 | 94 | } else if (aOffset < ranges[lo].SkippedOffset()) { |
| michael@0 | 95 | mCurrentRangeIndex = lo - 1; |
| michael@0 | 96 | if (mCurrentRangeIndex == -1) { |
| michael@0 | 97 | mOriginalStringOffset = aOffset; |
| michael@0 | 98 | return; |
| michael@0 | 99 | } |
| michael@0 | 100 | } else { |
| michael@0 | 101 | mCurrentRangeIndex = lo; |
| michael@0 | 102 | } |
| michael@0 | 103 | |
| michael@0 | 104 | const gfxSkipChars::SkippedRange& r = ranges[mCurrentRangeIndex]; |
| michael@0 | 105 | mOriginalStringOffset = r.End() + aOffset - r.SkippedOffset(); |
| michael@0 | 106 | } |
| michael@0 | 107 | |
| michael@0 | 108 | bool |
| michael@0 | 109 | gfxSkipCharsIterator::IsOriginalCharSkipped(int32_t* aRunLength) const |
| michael@0 | 110 | { |
| michael@0 | 111 | if (mCurrentRangeIndex == -1) { |
| michael@0 | 112 | // we're before the first skipped range (if any) |
| michael@0 | 113 | if (aRunLength) { |
| michael@0 | 114 | uint32_t end = mSkipChars->mRanges.IsEmpty() ? |
| michael@0 | 115 | mSkipChars->mCharCount : mSkipChars->mRanges[0].Start(); |
| michael@0 | 116 | *aRunLength = end - mOriginalStringOffset; |
| michael@0 | 117 | } |
| michael@0 | 118 | return mSkipChars->mCharCount == uint32_t(mOriginalStringOffset); |
| michael@0 | 119 | } |
| michael@0 | 120 | |
| michael@0 | 121 | const gfxSkipChars::SkippedRange& range = |
| michael@0 | 122 | mSkipChars->mRanges[mCurrentRangeIndex]; |
| michael@0 | 123 | |
| michael@0 | 124 | if (uint32_t(mOriginalStringOffset) < range.End()) { |
| michael@0 | 125 | if (aRunLength) { |
| michael@0 | 126 | *aRunLength = range.End() - mOriginalStringOffset; |
| michael@0 | 127 | } |
| michael@0 | 128 | return true; |
| michael@0 | 129 | } |
| michael@0 | 130 | |
| michael@0 | 131 | if (aRunLength) { |
| michael@0 | 132 | uint32_t end = |
| michael@0 | 133 | uint32_t(mCurrentRangeIndex) + 1 < mSkipChars->mRanges.Length() ? |
| michael@0 | 134 | mSkipChars->mRanges[mCurrentRangeIndex + 1].Start() : |
| michael@0 | 135 | mSkipChars->mCharCount; |
| michael@0 | 136 | *aRunLength = end - mOriginalStringOffset; |
| michael@0 | 137 | } |
| michael@0 | 138 | |
| michael@0 | 139 | return mSkipChars->mCharCount == uint32_t(mOriginalStringOffset); |
| michael@0 | 140 | } |
