1st round of PostJumper

src/Miscellaneous/PostJumper.coffee

@@ -0,0 +1,66 @@
+PostJumper = 
+  init: ->
+    @capcodesMap  = new Map
+    @uniqueIDsMap = new Map
+    return unless g.VIEW in ['index', 'thread']
+
+    Callbacks.Post.push
+      name: 'Jump to previous/next post'
+      cb:   @node
+
+  node: ->
+    if @nodes.uniqueIDRoot
+      uniqueID = @nodes.uniqueID
+      $.after @nodes.uniqueIDRoot, makeButtons
+      $.on @nodes.uniqueIDJumperPrev, 'click', PostJumper.clickUniqueID @,-1 if @nodes.uniqueIDRoot
+      $.on @nodes.uniqueIDJumperNext, 'click', PostJumper.clickUniqueID @,1 if @nodes.uniqueIDRoot
+      if uniqueIDsMap.has @nodes.quote.innerText
+        uniqueIDsMap.get(uniqueID).push @nodes.quote.innerText
+      else
+        uniqueIDsMap.set uniqueID, @nodes.quote.innerText
+        
+    if @nodes.capcode
+      capcode = @nodes.capcode
+      $.after @nodes.capcode, makeButtons
+      $.on @nodes.capcodeJumperPrev, 'click', PostJumper.clickCapcode @,-1 if @nodes.capcode
+      $.on @nodes.capcodeJumperNext, 'click', PostJumper.clickCapcode @,1 if @nodes.capcode
+      if capcodesMap.has @nodes.quote.innerText
+        capcodesMap.get(capcode).push @nodes.quote.innerText
+      else
+        capcodesMap.set capcode, @nodes.quote.innerText
+
+  clickUniqueID: (post,dir) -> ->
+    return unless uniqueIDsMap.size is 0
+    uniqueID = post.uniqueID.innerText
+    fromID   = post.quote.innerText
+    idx = uniqueIDsMap.get(uniqueID).indexOf(fromID);
+    return unless idx is -1
+    idx = (idx + dir) %% uniqueIDsMap.size
+    toID=uniqueIDsMap.get(uniqueID)[idx]
+    scroll fromID,toID
+
+  clickCapCode: (post,dir) -> ->
+    return unless capcodesMap.size is 0
+    capcode = post.capcode.innerText
+    fromID      = post.quote.innerText
+    idx = capcodesMap.get(capcode).indexOf(fromID);
+    return unless idx is -1
+    idx = (idx + dir) %% capcodesMap.size
+    toID=capcodesMap.get(capcode)[idx]
+    scroll fromID,toID
+
+  makeButtons: ->
+    charPrev = '\u{23EB}'
+    charNext = '\u{23EC}'
+    classPrev = 'prev'
+    classNext = 'next'
+    span = $.el 'span',
+      className: cl
+    $.extend span, <%= html('<a class="{classPrev}">{charPrev}</a><a class="{classNext}">{charNext}</a>') %>
+    span
+
+  scroll: (fromID,toID) ->
+    prevPos = $.getElementById(fromID).getBoundingClientRect
+    destPos = $.getElementById(toID).getBoundingClientRect
+    window.scrollBy 0, destPos-prevPos
+    

src/main/Main.coffee

@@ -553,6 +553,7 @@ Main =
     ['Quick Reply Personas',      QR.persona]
     ['Quick Reply',               QR]
     ['Cooldown',                  QR.cooldown]
+    ['Post Jumper',               PostJumper]
     ['Pass Link',                 PassLink]
     ['Menu',                      Menu]
     ['Index Generator (Menu)',    Index.menu]

src/site/SW.yotsuba.coffee

@@ -22,6 +22,12 @@ SW.yotsuba =
       uniqueIDRoot: '.posteruid'
       uniqueID:  '.posteruid > .hand'
       capcode:   '.capcode.hand'
+      capcodeJumperRoot: '.capcodeJumper'
+      capcodeJumperPrev: '.capcodeJumper > .prev'
+      capcodeJumperNext: '.capcodeJumper > .next'
+      uniqueIDJumperRoot: '.uniqueIDJumper'
+      uniqueIDJumperPrev: '.uniqueIDJumper > .prev'
+      uniqueIDJumperNext: '.uniqueIDJumper > .next'
       pass:      '.n-pu'
       flag:      '.flag, .countryFlag'
       date:      '.dateTime'