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Insert pagination utilities from beego/wetalk. Refs #835.
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@ -93,6 +93,14 @@ type ControllerInterface interface {
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URLMapping()
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}
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func (c *Controller) GetCtx() *context.Context {
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return c.Ctx
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}
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func (c *Controller) GetData() map[interface{}]interface{} {
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return c.Data
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}
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// Init generates default values of controller operations.
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func (c *Controller) Init(ctx *context.Context, controllerName, actionName string, app interface{}) {
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c.Layout = ""
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32
pagination/controller.go
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32
pagination/controller.go
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@ -0,0 +1,32 @@
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// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package pagination
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import (
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"github.com/astaxie/beego/context"
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)
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type PaginationController interface {
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GetCtx() *context.Context
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GetData() map[interface{}]interface{}
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}
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func SetPaginator(controller PaginationController, per int, nums int64) (paginator *Paginator) {
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request := controller.GetCtx().Request
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paginator = NewPaginator(request, per, nums)
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data := controller.GetData()
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data["paginator"] = paginator
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return
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}
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164
pagination/paginator.go
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164
pagination/paginator.go
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@ -0,0 +1,164 @@
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// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package pagination
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import (
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"math"
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"net/http"
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"net/url"
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"strconv"
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)
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type Paginator struct {
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Request *http.Request
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PerPageNums int
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MaxPages int
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nums int64
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pageRange []int
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pageNums int
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page int
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}
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func (p *Paginator) PageNums() int {
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if p.pageNums != 0 {
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return p.pageNums
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}
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pageNums := math.Ceil(float64(p.nums) / float64(p.PerPageNums))
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if p.MaxPages > 0 {
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pageNums = math.Min(pageNums, float64(p.MaxPages))
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}
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p.pageNums = int(pageNums)
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return p.pageNums
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}
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func (p *Paginator) Nums() int64 {
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return p.nums
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}
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func (p *Paginator) SetNums(nums interface{}) {
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p.nums, _ = ToInt64(nums)
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}
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func (p *Paginator) Page() int {
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if p.page != 0 {
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return p.page
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}
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if p.Request.Form == nil {
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p.Request.ParseForm()
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}
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p.page, _ = strconv.Atoi(p.Request.Form.Get("p"))
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if p.page > p.PageNums() {
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p.page = p.PageNums()
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}
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if p.page <= 0 {
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p.page = 1
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}
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return p.page
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}
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func (p *Paginator) Pages() []int {
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if p.pageRange == nil && p.nums > 0 {
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var pages []int
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pageNums := p.PageNums()
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page := p.Page()
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switch {
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case page >= pageNums-4 && pageNums > 9:
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start := pageNums - 9 + 1
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pages = make([]int, 9)
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for i, _ := range pages {
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pages[i] = start + i
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}
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case page >= 5 && pageNums > 9:
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start := page - 5 + 1
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pages = make([]int, int(math.Min(9, float64(page+4+1))))
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for i, _ := range pages {
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pages[i] = start + i
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}
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default:
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pages = make([]int, int(math.Min(9, float64(pageNums))))
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for i, _ := range pages {
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pages[i] = i + 1
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}
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}
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p.pageRange = pages
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}
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return p.pageRange
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}
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func (p *Paginator) PageLink(page int) string {
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link, _ := url.ParseRequestURI(p.Request.RequestURI)
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values := link.Query()
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if page == 1 {
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values.Del("p")
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} else {
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values.Set("p", strconv.Itoa(page))
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}
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link.RawQuery = values.Encode()
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return link.String()
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}
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func (p *Paginator) PageLinkPrev() (link string) {
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if p.HasPrev() {
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link = p.PageLink(p.Page() - 1)
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}
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return
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}
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func (p *Paginator) PageLinkNext() (link string) {
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if p.HasNext() {
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link = p.PageLink(p.Page() + 1)
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}
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return
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}
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func (p *Paginator) PageLinkFirst() (link string) {
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return p.PageLink(1)
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}
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func (p *Paginator) PageLinkLast() (link string) {
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return p.PageLink(p.PageNums())
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}
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func (p *Paginator) HasPrev() bool {
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return p.Page() > 1
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}
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func (p *Paginator) HasNext() bool {
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return p.Page() < p.PageNums()
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}
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func (p *Paginator) IsActive(page int) bool {
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return p.Page() == page
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}
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func (p *Paginator) Offset() int {
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return (p.Page() - 1) * p.PerPageNums
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}
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func (p *Paginator) HasPages() bool {
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return p.PageNums() > 1
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}
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func NewPaginator(req *http.Request, per int, nums interface{}) *Paginator {
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p := Paginator{}
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p.Request = req
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if per <= 0 {
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per = 10
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}
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p.PerPageNums = per
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p.SetNums(nums)
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return &p
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}
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20
pagination/utils.go
Normal file
20
pagination/utils.go
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@ -0,0 +1,20 @@
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package pagination
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import (
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"fmt"
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"reflect"
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)
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// convert any numeric value to int64
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func ToInt64(value interface{}) (d int64, err error) {
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val := reflect.ValueOf(value)
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switch value.(type) {
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case int, int8, int16, int32, int64:
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d = val.Int()
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case uint, uint8, uint16, uint32, uint64:
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d = int64(val.Uint())
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default:
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err = fmt.Errorf("ToInt64 need numeric not `%T`", value)
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}
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return
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}
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