krasse paginationberechnung (patent pending)

author: jan <jan@ruken.pw> 2015-12-30 08:27:55 (UTC)
committer: jan <jan@ruken.pw> 2015-12-30 08:27:55 (UTC)
commit: 9ab495abeec5e316adc2da4ac1afbd16d35826df (patch)
tree: 96f190a903b2365321db560821165fa1f78b47eb
parent: 10f014d5da7f1a35d2fc6cf0aa617a5ec4bb074f (diff)
4 files changed, 64 insertions, 5 deletions
diff --git a/frontend/utility.go b/frontend/utility.go
new file mode 100644
index 0000000..28e7db1
--- /dev/null
+++ b/frontend/utility.go
@@ -0,0 +1,49 @@
+package frontend
+type PaginationRange struct {
+        Before  []int
+        Current int
+        MaxPage int
+        After   []int
+}
+// PaginationFromPage gibt die Seiten vor und nach der gegebenen Seite zurück. pageRange gibt an, wie viele Seiten vor und nach der aktuellen Page angezeigt werden soll.
+func PaginationFromPage(pageRange, currentPage, maxPage int) PaginationRange {
+        var before []int
+        var after []int
+        startPage := currentPage - pageRange
+        endPage := currentPage + pageRange + 1
+        if startPage < 1 {
+                endPage += -startPage + 1
+                startPage = 1
+        }
+        if endPage > maxPage {
+                startPage -= (endPage - maxPage)
+                endPage = maxPage
+                if startPage < 1 {
+                        startPage = 1
+                }
+        }
+        for i := startPage; i < currentPage; i++ {
+                if i > maxPage {
+                        break
+                }
+                before = append(before, i)
+        }
+        for i := currentPage + 1; i < endPage; i++ {
+                after = append(after, i)
+        }
+        return PaginationRange{
+                before,
+                currentPage,
+                maxPage,
+                after,
+        }
+}
diff --git a/main.go b/main.go
index 04db8d6..850f0f9 100644
--- a/main.go
+++ b/main.go
@@ -44,6 +44,10 @@ func main() {
        log.Println("database connection established")
+        for i := 0; i < 10; i++ {
+                log.Println(frontend.PaginationFromPage(10, i, 3))
+        }
        renderer := frontend.New("views")
        login := charakterin.New(db)
        login.UseRenderer(renderer)
diff --git a/modules/tags/tags.go b/modules/tags/tags.go
index 527d1d9..650fa4e 100644
--- a/modules/tags/tags.go
+++ b/modules/tags/tags.go
@@ -122,7 +122,6 @@ func (m *Module) viewTagPage(w http.ResponseWriter, r *http.Request, p httproute
        data["user"] = user
        data["tag"] = tag
        data["cards"] = cards
-        data["currentPage"] = pageNumber
+        data["pagination"] = frontend.PaginationFromPage(3, pageNumber, pageCount)
-        data["pageCount"] = pageCount
        m.g.Renderer.RenderPage("tag", w, data)
 }
diff --git a/views/tag.html b/views/tag.html
index 3e89a7b..bc21fc3 100644
--- a/views/tag.html
+++ b/views/tag.html
@@ -1,4 +1,5 @@
 {{ define "tag" }}
+{{ $tagBaseURI := printf "/tag/%s/" .tag }}
 <html>
        <head>
                {{ template "materialize" }}
@@ -17,9 +18,15 @@
                                {{ end }}
                        </div>
                        <ul class="pagination center-align">
-                                <li class="{{ if eq .currentPage 1 }}disabled{{ else }}waves-effect{{ end }}"><a href="/tag/{{ .tag }}/{{ sub .currentPage 1 }}"><i class="material-icons">chevron_left</i></a></li>
+                                <li class="{{ if eq .pagination.Current 1 }}disabled{{ else }}waves-effect{{ end }}"><a href="{{ $tagBaseURI }}{{ sub .pagination.Current 1 }}"><i class="material-icons">chevron_left</i></a></li>
-                                <li class="active"><a href="#!">{{ .currentPage }}</a></li>
+                                {{ range .pagination.Before }}
-                                <li class="{{ if eq .currentPage .pageCount }}disabled{{ else }}waves-effect{{ end }}"><a href="/tag/{{ .tag }}/{{ add .currentPage 1 }}"><i class="material-icons">chevron_right</i></a></li>
+                                <li class="wave-effect"><a href="{{ $tagBaseURI }}{{ . }}">{{ . }}</a></li>
+                                {{ end }}
+                                <li class="active"><a href="#!">{{ .pagination.Current }}</a></li>
+                                {{ range .pagination.After }}
+                                <li class="wave-effect"><a href="{{ $tagBaseURI }}{{ . }}">{{ . }}</a></li>
+                                {{ end }}
+                                <li class="{{ if eq .pagination.Current .pagination.MaxPage }}disabled{{ else }}waves-effect{{ end }}"><a href="{{ $tagBaseURI }}{{ add .pagination.Current 1 }}"><i class="material-icons">chevron_right</i></a></li>
                                </ul>
                        </div>
                </div>
author	jan <jan@ruken.pw>	2015-12-30 08:27:55 (UTC)
committer	jan <jan@ruken.pw>	2015-12-30 08:27:55 (UTC)
commit	9ab495abeec5e316adc2da4ac1afbd16d35826df (patch)
tree	96f190a903b2365321db560821165fa1f78b47eb
parent	10f014d5da7f1a35d2fc6cf0aa617a5ec4bb074f (diff)

diff --git a/frontend/utility.go b/frontend/utility.go new file mode 100644 index 0000000..28e7db1 --- /dev/null +++ b/frontend/utility.go
@@ -0,0 +1,49 @@
		1	package frontend
		2
		3	type PaginationRange struct {
		4	Before []int
		5	Current int
		6	MaxPage int
		7	After []int
		8	}
		9
		10	// PaginationFromPage gibt die Seiten vor und nach der gegebenen Seite zurück. pageRange gibt an, wie viele Seiten vor und nach der aktuellen Page angezeigt werden soll.
		11	func PaginationFromPage(pageRange, currentPage, maxPage int) PaginationRange {
		12	var before []int
		13	var after []int
		14
		15	startPage := currentPage - pageRange
		16	endPage := currentPage + pageRange + 1
		17
		18	if startPage < 1 {
		19	endPage += -startPage + 1
		20	startPage = 1
		21	}
		22
		23	if endPage > maxPage {
		24	startPage -= (endPage - maxPage)
		25	endPage = maxPage
		26
		27	if startPage < 1 {
		28	startPage = 1
		29	}
		30	}
		31
		32	for i := startPage; i < currentPage; i++ {
		33	if i > maxPage {
		34	break
		35	}
		36	before = append(before, i)
		37	}
		38
		39	for i := currentPage + 1; i < endPage; i++ {
		40	after = append(after, i)
		41	}
		42
		43	return PaginationRange{
		44	before,
		45	currentPage,
		46	maxPage,
		47	after,
		48	}
		49	}


diff --git a/main.go b/main.go index 04db8d6..850f0f9 100644 --- a/main.go +++ b/main.go
@@ -44,6 +44,10 @@ func main() {
44		44
45	log.Println("database connection established")	45	log.Println("database connection established")
46		46
		47	for i := 0; i < 10; i++ {
		48	log.Println(frontend.PaginationFromPage(10, i, 3))
		49	}
		50
47	renderer := frontend.New("views")	51	renderer := frontend.New("views")
48	login := charakterin.New(db)	52	login := charakterin.New(db)
49	login.UseRenderer(renderer)	53	login.UseRenderer(renderer)


diff --git a/modules/tags/tags.go b/modules/tags/tags.go index 527d1d9..650fa4e 100644 --- a/modules/tags/tags.go +++ b/modules/tags/tags.go
@@ -122,7 +122,6 @@ func (m Module) viewTagPage(w http.ResponseWriter, r http.Request, p httproute
122	data["user"] = user	122	data["user"] = user
123	data["tag"] = tag	123	data["tag"] = tag
124	data["cards"] = cards	124	data["cards"] = cards
125	data["currentPage"] = pageNumber	125	data["pagination"] = frontend.PaginationFromPage(3, pageNumber, pageCount)
126	data["pageCount"] = pageCount
127	m.g.Renderer.RenderPage("tag", w, data)	126	m.g.Renderer.RenderPage("tag", w, data)
128	}	127	}


diff --git a/views/tag.html b/views/tag.html index 3e89a7b..bc21fc3 100644 --- a/views/tag.html +++ b/views/tag.html
@@ -1,4 +1,5 @@
1	{{ define "tag" }}	1	{{ define "tag" }}
		2	{{ $tagBaseURI := printf "/tag/%s/" .tag }}
2	<html>	3	<html>
3	<head>	4	<head>
4	{{ template "materialize" }}	5	{{ template "materialize" }}
@@ -17,9 +18,15 @@
17	{{ end }}	18	{{ end }}
18	</div>	19	</div>
19	<ul class="pagination center-align">	20	<ul class="pagination center-align">
20	<li class="{{ if eq .currentPage 1 }}disabled{{ else }}waves-effect{{ end }}"><a href="/tag/{{ .tag }}/{{ sub .currentPage 1 }}"><i class="material-icons">chevron_left</i></a></li>	21	<li class="{{ if eq .pagination.Current 1 }}disabled{{ else }}waves-effect{{ end }}"><a href="{{ $tagBaseURI }}{{ sub .pagination.Current 1 }}"><i class="material-icons">chevron_left</i></a></li>
21	<li class="active"><a href="#!">{{ .currentPage }}</a></li>	22	{{ range .pagination.Before }}
22	<li class="{{ if eq .currentPage .pageCount }}disabled{{ else }}waves-effect{{ end }}"><a href="/tag/{{ .tag }}/{{ add .currentPage 1 }}"><i class="material-icons">chevron_right</i></a></li>	23	<li class="wave-effect"><a href="{{ $tagBaseURI }}{{ . }}">{{ . }}</a></li>
		24	{{ end }}
		25	<li class="active"><a href="#!">{{ .pagination.Current }}</a></li>
		26	{{ range .pagination.After }}
		27	<li class="wave-effect"><a href="{{ $tagBaseURI }}{{ . }}">{{ . }}</a></li>
		28	{{ end }}
		29	<li class="{{ if eq .pagination.Current .pagination.MaxPage }}disabled{{ else }}waves-effect{{ end }}"><a href="{{ $tagBaseURI }}{{ add .pagination.Current 1 }}"><i class="material-icons">chevron_right</i></a></li>
23	</ul>	30	</ul>
24	</div>	31	</div>
25	</div>	32	</div>