Snap to intermediate nodes

[jidanni]

Description

Here we are attempting to put a fence around the north half of this playground. As you see we started from a place east of the playground:

Screenshots

As you see, we have already connected a few existing nodes.
But it is getting rather boring... we wish SHIFT+CLICK or CTRL+CLICK there at the red dot position on the west side of the playground would snap all the intermediate nodes for us!

Final result:

[1ec5]

#8671 implemented a “follow” operation for this situation. Instead of jumping all the way to the last node, just connect the first couple nodes, then press F repeatedly to follow the other way until you’ve reached the last node.

[jidanni]

Ah... but my™® solution just needs one click®™, instead of 1327 etc. repeated pounds of the F key, especially e.g., along long twisty international borders!

But I'm sure both solutions have their place.

Interesting points:

• Should the route around the circle pick
• • the shortest way (yes!)
• • the way following the direction (counter/clockwise) of the nodes
• What if we are following two ways in fact? They both go from A to D, but one goes ABD and the other ACD. Which one to follow. Hmmm... OK, the editor could show both and ask the user to pick one... Same with three ways...

[Woazboat]

For reference, the JOSM ContourMerge plugin does exactly this.

[Woazboat]

related #9223