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Apply fix to diff code as per http://www.mathertel.de/Diff/DiffTest.aspx?oldfile=Diff.cs.v1&newfile=Diff.cs.v2

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Raymond Hill 2018-12-20 18:57:06 -05:00
parent 7637102936
commit 0ce42fa23d
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1 changed files with 41 additions and 5 deletions
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46
src/lib/diff/swatinem_diff.js
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@ -27,6 +27,42 @@
need to generate a script which is compatible with the output of the
diff_match_patch, as expected by CodeMirror.
2018-12-20 gorhill:
There was an issue causing the wrong diff data to be issued, for instance
when diff-ing these two URLs on a character granularity basis (failure
point is marked):
|
/articles/5c1a7aae1854f30006cb26f7/lede/1545239527833-shutterstock_726 01757 2-copy.jpeg?crop=0.8889xw%3A0.9988xh%3B0.1089xw%2C0xh&resize=650%3A*&output-quality=55
/articles/5c1a* 1854f30006cb2* /lede/15452* -shutterstock_* 017* 2-copy.jpeg?crop=0.* xw%3A* h%3B0.0* xw%2C0xh&resize=650%3A*&output-quality=55
/articles/5c1aaea91854f30006cb2f1e/lede/1545253629235-shutterstock_106399017 2-copy.jpeg?crop=0.7749xw%3A1 xh%3B0.0391xw%2C0xh&resize=650%3A*&output-quality=55
|
Investigating, I found what appears to be the original source on which the
code below is based:
- "An O(ND) Difference Algorithm for C#" by Matthias Hertel
- http://www.mathertel.de/Diff/ViewSrc.aspx
- https://github.com/mathertel
There was a difference; code had been commented out in the original source:
http://www.mathertel.de/Diff/DiffTest.aspx?oldfile=Diff.cs.v1&newfile=Diff.cs.v2
The developer noted:
> There have been overlapping boxes; that where analyzed partial differently.
> One return-point is enough.
After applying the changes to the code below, the problematic diff-ing went
away:
|
/articles/5c1a7aae1854f30006cb26f7/lede/1545239527833-shutterstock_72601757 2-copy.jpeg?crop=0.8889xw%3A0.9988xh%3B0.1089xw%2C0xh&resize=650%3A*&output-quality=55
/articles/5c1a* 1854f30006cb2* /lede/15452* -shutterstock_* 017* 2-copy.jpeg?crop=0.* 9xw%3A* xh%3B0.* xw%2C0xh&resize=650%3A*&output-quality=55
/articles/5c1aaea91854f30006cb2f1e/lede/1545253629235-shutterstock_1063990172-copy.jpeg?crop=0.7749xw%3A1 xh%3B0.0391xw%2C0xh&resize=650%3A*&output-quality=55
|
So I will assume this was the issue.
TODO:
- Apply other changes which were applied to the original code
**/
'use strict';
@ -121,7 +157,7 @@
var snake = this.snake(astart, aend, bstart, bend);
this.lcs(astart, snake.x, bstart, snake.y);
this.lcs(snake.u, aend, snake.v, bend);
this.lcs(snake.x, aend, snake.y, bend);
}
};
@ -167,8 +203,8 @@
return {
x: down[k],
y: down[k] - k,
u: up[k],
v: up[k] - k,
// u: up[k],
// v: up[k] - k,
};
}
}
@ -195,8 +231,8 @@
return {
x: down[k],
y: down[k] - k,
u: up[k],
v: up[k] - k,
// u: up[k],
// v: up[k] - k,
};
}
}