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Commitc07b0a2

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committed
fix: Reorganize code for maximum tree-shakability
1 parente2d222b commitc07b0a2

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6 files changed

+292
-148
lines changed

6 files changed

+292
-148
lines changed

‎src/core/immerClass.ts‎

Lines changed: 27 additions & 131 deletions
Original file line numberDiff line numberDiff line change
@@ -3,39 +3,37 @@ import {
33
IProduce,
44
ImmerState,
55
Drafted,
6-
isDraftable,
7-
processResult,
86
Patch,
97
Objectish,
10-
DRAFT_STATE,
118
Draft,
129
PatchListener,
13-
isDraft,
1410
isMap,
1511
isSet,
1612
createProxyProxy,
1713
getPlugin,
18-
die,
19-
enterScope,
20-
revokeScope,
21-
leaveScope,
22-
usePatchesInScope,
2314
getCurrentScope,
24-
NOTHING,
25-
freeze,
26-
current
15+
DEFAULT_AUTOFREEZE,
16+
DEFAULT_USE_STRICT_SHALLOW_COPY,
17+
ImmerContext,
18+
applyPatchesImpl,
19+
createDraftImpl,
20+
finishDraftImpl,
21+
produceImpl,
22+
produceWithPatchesImpl,
23+
setAutoFreezeImpl,
24+
setUseStrictShallowCopyImpl
2725
}from"../internal"
2826

2927
interfaceProducersFns{
3028
produce:IProduce
3129
produceWithPatches:IProduceWithPatches
3230
}
3331

34-
exporttypeStrictMode=boolean|"class_only";
32+
exporttypeStrictMode=boolean|"class_only"
3533

36-
exportclassImmerimplementsProducersFns{
37-
autoFreeze_:boolean=true
38-
useStrictShallowCopy_:StrictMode=false
34+
exportclassImmerimplementsProducersFns,ImmerContext{
35+
autoFreeze_:boolean=DEFAULT_AUTOFREEZE
36+
useStrictShallowCopy_:StrictMode=DEFAULT_USE_STRICT_SHALLOW_COPY
3937

4038
constructor(config?:{
4139
autoFreeze?:boolean
@@ -66,139 +64,37 @@ export class Immer implements ProducersFns {
6664
*@param {Function} patchListener - optional function that will be called with all the patches produced here
6765
*@returns {any} a new state, or the initial state if nothing was modified
6866
*/
69-
produce:IProduce=(base:any,recipe?:any,patchListener?:any)=>{
70-
// curried invocation
71-
if(typeofbase==="function"&&typeofrecipe!=="function"){
72-
constdefaultBase=recipe
73-
recipe=base
67+
produce:IProduce=produceImpl.bind(this)
7468

75-
constself=this
76-
returnfunctioncurriedProduce(
77-
this:any,
78-
base=defaultBase,
79-
...args:any[]
80-
){
81-
returnself.produce(base,(draft:Drafted)=>recipe.call(this,draft, ...args))// prettier-ignore
82-
}
83-
}
69+
produceWithPatches:IProduceWithPatches=produceWithPatchesImpl.bind(this)
8470

85-
if(typeofrecipe!=="function")die(6)
86-
if(patchListener!==undefined&&typeofpatchListener!=="function")
87-
die(7)
71+
createDraft=createDraftImpl.bind(this)as<TextendsObjectish>(
72+
base:T
73+
)=>Draft<T>
8874

89-
letresult
90-
91-
// Only plain objects, arrays, and "immerable classes" are drafted.
92-
if(isDraftable(base)){
93-
constscope=enterScope(this)
94-
constproxy=createProxy(base,undefined)
95-
lethasError=true
96-
try{
97-
result=recipe(proxy)
98-
hasError=false
99-
}finally{
100-
// finally instead of catch + rethrow better preserves original stack
101-
if(hasError)revokeScope(scope)
102-
elseleaveScope(scope)
103-
}
104-
usePatchesInScope(scope,patchListener)
105-
returnprocessResult(result,scope)
106-
}elseif(!base||typeofbase!=="object"){
107-
result=recipe(base)
108-
if(result===undefined)result=base
109-
if(result===NOTHING)result=undefined
110-
if(this.autoFreeze_)freeze(result,true)
111-
if(patchListener){
112-
constp:Patch[]=[]
113-
constip:Patch[]=[]
114-
getPlugin("Patches").generateReplacementPatches_(base,result,p,ip)
115-
patchListener(p,ip)
116-
}
117-
returnresult
118-
}elsedie(1,base)
119-
}
120-
121-
produceWithPatches:IProduceWithPatches=(base:any,recipe?:any):any=>{
122-
// curried invocation
123-
if(typeofbase==="function"){
124-
return(state:any, ...args:any[])=>
125-
this.produceWithPatches(state,(draft:any)=>base(draft, ...args))
126-
}
127-
128-
letpatches:Patch[],inversePatches:Patch[]
129-
constresult=this.produce(base,recipe,(p:Patch[],ip:Patch[])=>{
130-
patches=p
131-
inversePatches=ip
132-
})
133-
return[result,patches!,inversePatches!]
134-
}
135-
136-
createDraft<TextendsObjectish>(base:T):Draft<T>{
137-
if(!isDraftable(base))die(8)
138-
if(isDraft(base))base=current(base)
139-
constscope=enterScope(this)
140-
constproxy=createProxy(base,undefined)
141-
proxy[DRAFT_STATE].isManual_=true
142-
leaveScope(scope)
143-
returnproxyasany
144-
}
145-
146-
finishDraft<DextendsDraft<any>>(
75+
finishDraft=finishDraftImpl.bind(this)as<DextendsDraft<any>>(
14776
draft:D,
14877
patchListener?:PatchListener
149-
):DextendsDraft<inferT> ?T :never{
150-
conststate:ImmerState=draft&&(draftasany)[DRAFT_STATE]
151-
if(!state||!state.isManual_)die(9)
152-
const{scope_:scope}=state
153-
usePatchesInScope(scope,patchListener)
154-
returnprocessResult(undefined,scope)
155-
}
78+
)=>DextendsDraft<inferT> ?T :never
15679

15780
/**
15881
* Pass true to automatically freeze all copies created by Immer.
15982
*
16083
* By default, auto-freezing is enabled.
16184
*/
162-
setAutoFreeze(value:boolean){
163-
this.autoFreeze_=value
164-
}
85+
setAutoFreeze=setAutoFreezeImpl.bind(this)
16586

16687
/**
16788
* Pass true to enable strict shallow copy.
16889
*
16990
* By default, immer does not copy the object descriptors such as getter, setter and non-enumrable properties.
17091
*/
171-
setUseStrictShallowCopy(value:StrictMode){
172-
this.useStrictShallowCopy_=value
173-
}
174-
175-
applyPatches<TextendsObjectish>(base:T,patches:readonlyPatch[]):T{
176-
// If a patch replaces the entire state, take that replacement as base
177-
// before applying patches
178-
leti:number
179-
for(i=patches.length-1;i>=0;i--){
180-
constpatch=patches[i]
181-
if(patch.path.length===0&&patch.op==="replace"){
182-
base=patch.value
183-
break
184-
}
185-
}
186-
// If there was a patch that replaced the entire state, start from the
187-
// patch after that.
188-
if(i>-1){
189-
patches=patches.slice(i+1)
190-
}
92+
setUseStrictShallowCopy=setUseStrictShallowCopyImpl.bind(this)
19193

192-
constapplyPatchesImpl=getPlugin("Patches").applyPatches_
193-
if(isDraft(base)){
194-
// N.B: never hits if some patch a replacement, patches are never drafts
195-
returnapplyPatchesImpl(base,patches)
196-
}
197-
// Otherwise, produce a copy of the base state.
198-
returnthis.produce(base,(draft:Drafted)=>
199-
applyPatchesImpl(draft,patches)
200-
)
201-
}
94+
applyPatches=applyPatchesImpl.bind(this)as<TextendsObjectish>(
95+
base:T,
96+
patches:readonlyPatch[]
97+
)=>T
20298
}
20399

204100
exportfunctioncreateProxy<TextendsObjectish>(

‎src/core/immerContext.ts‎

Lines changed: 16 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,16 @@
1+
import{StrictMode}from"../internal"
2+
3+
exportconstDEFAULT_AUTOFREEZE=true
4+
exportconstDEFAULT_USE_STRICT_SHALLOW_COPY=false
5+
6+
exportinterfaceImmerContext{
7+
autoFreeze_:boolean
8+
useStrictShallowCopy_:StrictMode
9+
}
10+
11+
exportfunctioncreateImmerContext():ImmerContext{
12+
return{
13+
autoFreeze_:DEFAULT_AUTOFREEZE,
14+
useStrictShallowCopy_:DEFAULT_USE_STRICT_SHALLOW_COPY
15+
}
16+
}

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