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}
function focusNextId(id,dx){
if( dx<-1 ) return focusFirstId(id);
if( dx>+1 ) return focusLastId(id);
var m = /^m(\d+)$/.exec(id);
return m!==null ? 'm' + (parseInt(m[1]) + dx) : null;
}
// NOTE: This code relies on `getElementsByClassName()' returning elements
// in document order; however, attempts to use binary searching (using the
// signed distance to the vertical center) or 2-pass searching (to get the
// 1000-block first) didn't yield any significant speedups -- probably the
// calls to `getBoundingClientRect()' are cached because `initGraph()' has
// already done so, or because they depend on their previous siblings, and
// so `e(N).getBoundingClientRect()' ≈ `e(0..N).getBoundingClientRect()'?
function focusViewportCenterId(){
var
fe = null,
fd = 0,
wt = 0,
wb = wt + window.innerHeight,
wc = wt + window.innerHeight/2,
el = document.getElementsByClassName('timelineGraph');
for( var i=0; i<el.length; i++ ){
var
rc = el[i].getBoundingClientRect(),
et = rc.top,
eb = rc.bottom;
if( (et>=wt && et<=wb) || (eb>=wt && eb<=wb) ){
var ed = Math.min(Math.abs(et-wc),Math.abs(eb-wc));
if( !fe || ed<fd ){
fe = el[i];
fd = ed;
}
else break;
}
}
return fe ? fe.querySelector('.tl-nodemark').id : null;
}
function timelineGetDataBlock(i){
var tb = document.getElementById('timeline-data-' + i);
return tb ? JSON.parse(tb.textContent || tb.innerText) : null;
}
function timelineGetRowInfo(id){
var ti;
for(var i=0; ti=timelineGetDataBlock(i); i++){
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var
mSHIFT = 1<<13,
kFRST = mSHIFT | 78 /* SHIFT+N */,
kNEXT = 78 /* N */,
kPREV = 77 /* M */,
kLAST = mSHIFT | 77 /* SHIFT+M */,
kCYCL = 72 /* H */,
kCNTR = 190 /* . */,
kSCRL = mSHIFT | 72 /* H */,
kTICK = 188 /* , */,
kUNTK = mSHIFT | 188 /* , */,
kCPYH = 66 /* B */,
kCPYB = mSHIFT | 66 /* SHIFT+B */,
kTMLN = 74 /* J */,
kTMLB = mSHIFT | 74 /* J */,
kVIEW = 75 /* K */,
kDONE = 27 /* ESC */,
mod = evt.altKey<<15 | evt.ctrlKey<<14 | evt.shiftKey<<13,
key = ( evt.which || evt.keyCode ) | mod;
var dx = 0;
switch( key ){
case kFRST: dx = -2; break;
case kNEXT: dx = -1; break;
case kPREV: dx = +1; break;
case kLAST: dx = +2; break;
case kCYCL:
case kCNTR:
case kSCRL:
case kTICK:
case kUNTK:
case kCPYH:
case kCPYB:
case kTMLN:
case kTMLB:
case kVIEW:
case kDONE: break;
default: return;
}
if( key==kCNTR ){
var cid = focusViewportCenterId();
if( cid ){
focusCacheSet(cid);
focusVisualize(cid,false);
focusCookieInit();
}
return;
}
if( key==kSCRL ){
else if( key==kSCRL ){
var td = document.querySelector('.timelineFocused');
if( td ) fossilScrollIntoView(td);
return;
}
else if( key==kUNTK ){
var tid = focusTickedId();
if( tid ){
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