scratch – Blame information for rev 58
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Rev | Author | Line No. | Line |
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58 | office | 1 | define( [ |
2 | "../core", |
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3 | "../var/rcssNum" |
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4 | ], function( jQuery, rcssNum ) { |
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5 | |||
6 | "use strict"; |
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7 | |||
8 | function adjustCSS( elem, prop, valueParts, tween ) { |
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9 | var adjusted, |
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10 | scale = 1, |
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11 | maxIterations = 20, |
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12 | currentValue = tween ? |
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13 | function() { |
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14 | return tween.cur(); |
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15 | } : |
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16 | function() { |
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17 | return jQuery.css( elem, prop, "" ); |
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18 | }, |
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19 | initial = currentValue(), |
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20 | unit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ), |
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21 | |||
22 | // Starting value computation is required for potential unit mismatches |
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23 | initialInUnit = ( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) && |
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24 | rcssNum.exec( jQuery.css( elem, prop ) ); |
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25 | |||
26 | if ( initialInUnit && initialInUnit[ 3 ] !== unit ) { |
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27 | |||
28 | // Trust units reported by jQuery.css |
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29 | unit = unit || initialInUnit[ 3 ]; |
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30 | |||
31 | // Make sure we update the tween properties later on |
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32 | valueParts = valueParts || []; |
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33 | |||
34 | // Iteratively approximate from a nonzero starting point |
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35 | initialInUnit = +initial || 1; |
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36 | |||
37 | do { |
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38 | |||
39 | // If previous iteration zeroed out, double until we get *something*. |
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40 | // Use string for doubling so we don't accidentally see scale as unchanged below |
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41 | scale = scale || ".5"; |
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42 | |||
43 | // Adjust and apply |
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44 | initialInUnit = initialInUnit / scale; |
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45 | jQuery.style( elem, prop, initialInUnit + unit ); |
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46 | |||
47 | // Update scale, tolerating zero or NaN from tween.cur() |
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48 | // Break the loop if scale is unchanged or perfect, or if we've just had enough. |
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49 | } while ( |
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50 | scale !== ( scale = currentValue() / initial ) && scale !== 1 && --maxIterations |
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51 | ); |
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52 | } |
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53 | |||
54 | if ( valueParts ) { |
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55 | initialInUnit = +initialInUnit || +initial || 0; |
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56 | |||
57 | // Apply relative offset (+=/-=) if specified |
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58 | adjusted = valueParts[ 1 ] ? |
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59 | initialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] : |
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60 | +valueParts[ 2 ]; |
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61 | if ( tween ) { |
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62 | tween.unit = unit; |
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63 | tween.start = initialInUnit; |
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64 | tween.end = adjusted; |
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65 | } |
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66 | } |
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67 | return adjusted; |
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68 | } |
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69 | |||
70 | return adjustCSS; |
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71 | } ); |