1 files changed, 240 insertions, 0 deletions
diff --git a/.vim/ftplugin/java/CTree.vim b/.vim/ftplugin/java/CTree.vim
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+" -------------------------------------------------------------------
+"  CTree.vim -- Display Class/Interface Hierarchy "{{{
+"
+"  Author:   Yanbiao Zhao (yanbiao_zhao at yahoo.com)
+"  Requires: Vim 7
+"  Version:  1.1.2
+"
+"  Command:
+"      CTree -- Display a tree of Class/Interface hierarchy
+"      CTag  -- Jump to the class/interface definition of the tag
+"  }}}
+
+if v:version < 700
+	echomsg "Vim 7 or higher is required for CTree.vim"
+	finish
+endif
+
+command! -nargs=1 -complete=tag CTree      call s:CTree_GetTypeTree(<f-args>)
+command! -nargs=1 -complete=tag CTag       call s:CT_Jump_To_ClassName(<f-args>)
+
+"Short cut to use the commands
+"nmap <silent> <M-F9>  :exec "CTree ".expand("<cword>")<CR>
+"nmap <silent> <M-]>   :exec "CTag  ".expand("<cword>")<CR>
+
+function! s:CT_Jump_To_ClassName(className)
+    let tagEntry = {}
+    let tagEntry["name"] = a:className 
+    if s:CT_Jump_To_Class(tagEntry)== 0
+        echohl WarningMsg | echo 'tag not found: '.a:className | echohl None
+    endif
+endfunction
+
+let s:CTree_AllTypeEntries = []
+let s:CTree_TagEnvCache = ''
+let s:CTree_tagFilesCache = {}
+
+function! s:CTree_GetTypeTree(typeName)
+    call s:CTree_LoadAllTypeEntries()
+
+    let rootEntry = s:CTree_GetRootType(a:typeName, '')
+
+    if empty(rootEntry)
+        let rootEntry["name"] = a:typeName
+        let rootEntry["namespace"] = ""
+        let rootEntry["kind"] = 'c' 
+        let rootEntry["inherits"] = ""
+    endif
+
+    echohl Title | echo '   #  tag' | echohl None
+
+    let allEntries = []
+    call s:CTree_GetChildren(allEntries, rootEntry, 0)
+
+    let i = input('Choice number (<Enter> cancels):')
+    let i = str2nr(i)
+    if i > 0 && i <= len(allEntries)
+        call s:CT_Jump_To_Class(allEntries[i-1])
+    endif
+endfunction
+
+function! s:CTree_GetChildren(allEntries, rootEntry, depth)
+    call add(a:allEntries, a:rootEntry)
+    call s:CTree_DisplayTagEntry(len(a:allEntries), a:rootEntry, a:depth)
+
+    let children = []
+    let rootTypeName = a:rootEntry["name"]
+    for tagEntry in s:CTree_AllTypeEntries
+        if index(split(tagEntry["inherits"], ","), rootTypeName) >= 0 
+            call add(children, tagEntry)
+        endif
+    endfor
+
+    let rootKind = a:rootEntry["kind"]
+    for child in children
+        "We only want to display class that implement an interface directly
+        if child["kind"] == 'c' && rootKind == 'i'
+            call add(a:allEntries, child) 
+            call s:CTree_DisplayTagEntry(len(a:allEntries), child, a:depth+1)
+        else
+            call s:CTree_GetChildren(a:allEntries, child, a:depth+1)
+        endif
+    endfor
+    
+endfunction
+
+" Return if a tag file has changed in tagfiles()
+function! s:HasTagFileChanged()
+    let result = 0
+    let tagFiles = map(tagfiles(), 'escape(v:val, " ")')
+    let newTagFilesCache = {}
+
+    if len(tagFiles) != len(s:CTree_tagFilesCache)
+        let result = 1
+    endif
+
+    for tagFile in tagFiles
+        let currentFiletime = getftime(tagFile)
+        let newTagFilesCache[tagFile] = currentFiletime
+
+        if !has_key(s:CTree_tagFilesCache, tagFile)
+            let result = 1
+        elseif currentFiletime != s:CTree_tagFilesCache[tagFile]
+            let result = 1
+        endif
+    endfor
+
+    let s:CTree_tagFilesCache = newTagFilesCache
+    return result
+endfunc
+
+function! s:CTree_LoadAllTypeEntries()
+    if s:HasTagFileChanged()
+        let s:CTree_AllTypeEntries = []
+    else
+        return
+    endif
+
+    echo 'Loading tag information. It may take a while...'
+    let ch = 'A'
+    while ch <= 'Z'
+        call s:CTree_GetTypeEntryWithCh(ch)
+        let ch = nr2char(char2nr(ch)+1)
+    endwhile 
+
+    call s:CTree_GetTypeEntryWithCh('_')
+
+    let ch = 'a'
+    while ch <= 'z'
+        call s:CTree_GetTypeEntryWithCh(ch)
+        let ch = nr2char(char2nr(ch)+1)
+    endwhile 
+
+     echo "Count of type tag entries loaded: ".len(s:CTree_AllTypeEntries)
+endfunction
+
+function! s:CTree_GetTypeEntryWithCh(ch)
+    for tagEntry in taglist('^'.a:ch)
+        let kind = tagEntry["kind"]
+        if (kind == 'i' || kind == 'c') && has_key(tagEntry, "inherits")
+            call add(s:CTree_AllTypeEntries, tagEntry)
+        endif
+    endfor
+endfunction
+
+function! s:CTree_GetRootType(typeName, originalKind)
+    for tagEntry in taglist("^".a:typeName."$")  
+
+        let kind = tagEntry["kind"] 
+        if kind != 'c' && kind != 'i'
+            continue
+        endif
+
+        let originalKind = a:originalKind
+        if originalKind == '' 
+            let originalKind = kind
+        elseif originalKind != tagEntry["kind"]
+            "We will not accept interface as a parent of class
+            return {}
+        endif
+
+        if !has_key(tagEntry, "inherits")
+            return tagEntry
+        endif
+
+        "interface support multiple inheritance, so we will not try to get its
+        "parent if it has more than one parent 
+        let parents = split(tagEntry["inherits"], ",")
+        if originalKind == 'i' && len(parents) > 1
+            return tagEntry
+        endif
+
+        for parent in parents 
+            let rootEntry = s:CTree_GetRootType(parent, originalKind)
+
+            if !empty(rootEntry)
+                return rootEntry
+            endif
+        endfor
+
+        return tagEntry
+    endfor
+
+    return {}
+endfunction 
+
+function! s:CTree_DisplayTagEntry(index, typeEntry, depth)
+    let s = string(a:index)
+    while strlen(s) < 4
+        let s = ' '.s
+    endwhile
+
+    let s = s." "
+    let i = 0
+    while i < a:depth
+        let s = s."    "
+        let i = i + 1
+    endwhile
+
+    let s = s.a:typeEntry["name"]
+
+    if has_key(a:typeEntry, "namespace")
+        let s = s.' ['.a:typeEntry["namespace"].']'
+    elseif has_key(a:typeEntry, "class")
+        let s = s.' <'.a:typeEntry["class"].'>'
+    endif
+
+    echo s
+endfunction
+
+function! s:CT_Jump_To_Class(tagEntry)
+    let className = a:tagEntry["name"]
+
+    if has_key(a:tagEntry, "namespace")
+        let keyName = "namespace"
+    elseif has_key(a:tagEntry, "class")
+        let keyName = "class"
+    else
+        let keyName = ""
+    endif
+
+    if keyName == "" 
+        let namespace = ""
+    else
+        let namespace = a:tagEntry[keyName] 
+    endif
+
+    let i = 1
+    let entries = taglist('^'.className.'$')
+    for entry in entries 
+        let kind = entry["kind"]
+        if kind == 'c' || kind == 'i' || kind == 'g'
+            if namespace == "" || namespace == entry[keyName]
+                exec "silent ".i."tag ".className
+                return 1
+            endif
+        endif
+        let i += 1
+    endfor
+    return 0
+endfunction