utils.vim

vim的自动配置文件

endfunc

" Get a tag item after a scope resolution and typedef resolution
function! omni#cpp#utils#GetResolvedTagItem(namespaces, typeInfo)
    let typeInfo = {}
    if type(a:typeInfo) == 1
        let typeInfo = omni#cpp#utils#CreateTypeInfo(a:typeInfo)
    else
        let typeInfo = a:typeInfo
    endif

    let result = {}
    if !omni#cpp#utils#IsTypeInfoValid(typeInfo)
        return result
    endif

    " Unnamed type case eg: '1::2'
    if typeInfo.type == 4
        " Here there is no typedef or namespace to resolve, the tagInfo.value is a tag item
        " representing a variable ('v') a member ('m') or a typedef ('t') and the typename is
        " always in global scope
        return typeInfo.value
    endif

    " Named type case eg:  'MyNamespace::MyClass'
    let szTypeInfo = omni#cpp#utils#GetTypeInfoString(typeInfo)

    " Resolving namespace alias
    " TODO: For the next release
    "let szTypeInfo = omni#cpp#namespaces#ResolveAlias(g:omni#cpp#namespaces#CacheAlias, szTypeInfo)

    if szTypeInfo=='::'
        return result
    endif

    " We can only get members of class, struct, union and namespace
    let szTagFilter = "index(['c', 's', 'u', 'n', 't'], v:val.kind[0])>=0"
    let szTagQuery = szTypeInfo

    if s:IsTypeInfoResolved(szTypeInfo)
        " The type info is already resolved, we remove the starting '::'
        let szTagQuery = substitute(szTypeInfo, '^::', '', 'g')
        if len(split(szTagQuery, '::'))==1
            " eg: ::MyClass
            " Here we have to get tags that have no parent scope
            " That's why we change the szTagFilter
            let szTagFilter .= '&& ' . g:omni#cpp#utils#szFilterGlobalScope
            let tagList = omni#common#utils#TagListNoThrow('^'.szTagQuery.'$')
            call filter(tagList, szTagFilter)
            if len(tagList)
                let result = tagList[0]
            endif
        else
            " eg: ::MyNamespace::MyClass
            let tagList = omni#common#utils#TagListNoThrow('^'.szTagQuery.'$')
            call filter(tagList, szTagFilter)

            if len(tagList)
                let result = tagList[0]
            endif
        endif
    else
        " The type is not resolved
        let tagList = omni#common#utils#TagListNoThrow('^'.szTagQuery.'$')
        call filter(tagList, szTagFilter)

        if len(tagList)
            " Resolving scope (namespace, nested class etc...)
            let szScopeOfTypeInfo = s:ExtractScopeFromTypeInfo(szTypeInfo)
            if s:IsTypeInfoResolved(szTypeInfo)
                let result = s:GetTagOfSameScope(tagList, szScopeOfTypeInfo)
            else
                " For each namespace of the namespace list we try to get a tag
                " that can be in the same scope
                if g:OmniCpp_NamespaceSearch && &filetype != 'c'
                    for scope in a:namespaces
                        let szTmpScope = omni#cpp#utils#SimplifyScope(scope.'::'.szScopeOfTypeInfo)
                        let result = s:GetTagOfSameScope(tagList, szTmpScope)
                        if result!={}
                            break
                        endif
                    endfor
                else
                    let szTmpScope = omni#cpp#utils#SimplifyScope('::'.szScopeOfTypeInfo)
                    let result = s:GetTagOfSameScope(tagList, szTmpScope)
                endif
            endif
        endif
    endif

    if result!={}
        " We have our tagItem but maybe it's a typedef or an unnamed type
        if result.kind[0]=='t'
            " Here we can have a typedef to another typedef, a class, struct, union etc
            " but we can also have a typedef to an unnamed type, in that
            " case the result contains a 'typeref' key
            let namespaces = [omni#cpp#utils#ExtractScope(result), '::']
            if has_key(result, 'typeref')
                let result = omni#cpp#utils#GetResolvedTagItem(namespaces, omni#cpp#utils#CreateTypeInfo(result))
            else
                let szCmd = omni#cpp#utils#ExtractCmdFromTagItem(result)
                let szCode = substitute(omni#cpp#utils#GetCodeFromLine(szCmd), '\C\<'.result.name.'\>.*', '', 'g')
                let szTypeInfo = omni#cpp#utils#ExtractTypeInfoFromTokens(omni#cpp#tokenizer#Tokenize(szCode))
                let result = omni#cpp#utils#GetResolvedTagItem(namespaces, omni#cpp#utils#CreateTypeInfo(szTypeInfo))
                " TODO: Namespace resolution for result
            endif
        endif
    endif

    return result
endfunc

" Returns if the type info is valid
" @return
"   - 1 if valid
"   - 0 otherwise
function! omni#cpp#utils#IsTypeInfoValid(typeInfo)
    if a:typeInfo=={}
        return 0
    else
        if a:typeInfo.type == 1 && a:typeInfo.value==''
            " String case
            return 0
        elseif a:typeInfo.type == 4 && a:typeInfo.value=={}
            " Dictionary case
            return 0
        endif
    endif
    return 1
endfunc

" Get the string of the type info
function! omni#cpp#utils#GetTypeInfoString(typeInfo)
    if a:typeInfo.type == 1
        return a:typeInfo.value
    else
        return substitute(a:typeInfo.value.typeref, '^\w\+:', '', 'g')
    endif
endfunc

" A resolved type info starts with '::'
" @return
"   - 1 if type info starts with '::'
"   - 0 otherwise
function! s:IsTypeInfoResolved(szTypeInfo)
    return match(a:szTypeInfo, '^::')!=-1
endfunc

" A returned type info's scope may not have the global namespace '::'
" eg: '::NameSpace1::NameSpace2::MyClass' => '::NameSpace1::NameSpace2'
" 'NameSpace1::NameSpace2::MyClass' => 'NameSpace1::NameSpace2'
function! s:ExtractScopeFromTypeInfo(szTypeInfo)
    let szScope = substitute(a:szTypeInfo, '\w\+$', '', 'g')
    if szScope =='::'
        return szScope
    else
        return substitute(szScope, '::$', '', 'g')
    endif
endfunc

" @return
"   -   the tag with the same scope
"   -   {} otherwise
function! s:GetTagOfSameScope(listTags, szScopeToMatch)
    for tagItem in a:listTags 
        let szScopeOfTag = omni#cpp#utils#ExtractScope(tagItem)
        if szScopeOfTag == a:szScopeToMatch
            return tagItem
        endif
    endfor
    return {}
endfunc

" Extract the cmd of a tag item without regexp
function! omni#cpp#utils#ExtractCmdFromTagItem(tagItem)
    let line = a:tagItem.cmd
    let re = '\(\/\^\)\|\(\$\/\)'
    if match(line, re)!=-1
        let line = substitute(line, re, '', 'g')
        return line
    else
        " TODO: the cmd is a line number
        return ''
    endif
endfunc

" Extract type from tokens.
" eg: examples of tokens format
"   'const MyClass&'
"   'const map < int, int >&'
"   'MyNs::MyClass'
"   '::MyClass**'
"   'MyClass a, *b = NULL, c[1] = {};
"   'hello(MyClass a, MyClass* b'
" @return the type info string eg: ::std::map
" can be empty
function! omni#cpp#utils#ExtractTypeInfoFromTokens(tokens)
    let szResult = ''
    let state = 0

    let tokens = omni#cpp#utils#BuildParenthesisGroups(a:tokens)

    " If there is an unbalanced parenthesis we are in a parameter list
    let bParameterList = 0
    for token in tokens
        if token.value == '(' && token.group==-1
            let bParameterList = 1
            break
        endif
    endfor

    if bParameterList
        let tokens = reverse(tokens)
        let state = 0
        let parenGroup = -1
        for token in tokens
            if state==0
                if token.value=='>'
                    let parenGroup = token.group
                    let state=1
                elseif token.kind == 'cppWord'
                    let szResult = token.value.szResult
                    let state=2
                elseif index(['*', '&'], token.value)<0
                    break
                endif
            elseif state==1
                if token.value=='<' && token.group==parenGroup
                    let state=0
                endif
            elseif state==2
                if token.value=='::'
                    let szResult = token.value.szResult
                    let state=3
                else
                    break
                endif
            elseif state==3
                if token.kind == 'cppWord'
                    let szResult = token.value.szResult
                    let state=2
                else
                    break
                endif
            endif
        endfor
        return szResult
    endif

    for token in tokens
        if state==0
            if token.value == '::'
                let szResult .= token.value
                let state = 1
            elseif token.kind == 'cppWord'
                let szResult .= token.value
                let state = 2
                " Maybe end of token
            endif
        elseif state==1
            if token.kind == 'cppWord'
                let szResult .= token.value
                let state = 2
                " Maybe end of token
            else
                break
            endif
        elseif state==2
            if token.value == '::'
                let szResult .= token.value
                let state = 1
            else
                break
            endif
        endif
    endfor
    return szResult
endfunc

" Get the preview window string
function! omni#cpp#utils#GetPreviewWindowStringFromTagItem(tagItem)
    let szResult = ''

    let szResult .= 'name: '.a:tagItem.name."\n"
    for tagKey in keys(a:tagItem)
        if index(['name', 'static'], tagKey)>=0
            continue
        endif
        let szResult .= tagKey.': '.a:tagItem[tagKey]."\n"
    endfor

    return substitute(szResult, "\n$", '', 'g')
endfunc