Make Page an interface

The main motivation of this commit is to add a `page.Page` interface to replace the very file-oriented `hugolib.Page` struct.
This is all a preparation step for issue  #5074, "pages from other data sources".

But this also fixes a set of annoying limitations, especially related to custom output formats, and shortcodes.

Most notable changes:

* The inner content of shortcodes using the `{{%` as the outer-most delimiter will now be sent to the content renderer, e.g. Blackfriday.
  This means that any markdown will partake in the global ToC and footnote context etc.
* The Custom Output formats are now "fully virtualized". This removes many of the current limitations.
* The taxonomy list type now has a reference to the `Page` object.
  This improves the taxonomy template `.Title` situation and make common template constructs much simpler.

See #5074
Fixes #5763
Fixes #5758
Fixes #5090
Fixes #5204
Fixes #4695
Fixes #5607
Fixes #5707
Fixes #5719
Fixes #3113
Fixes #5706
Fixes #5767
Fixes #5723
Fixes #5769
Fixes #5770
Fixes #5771
Fixes #5759
Fixes #5776
Fixes #5777
Fixes #5778

1 files changed, 0 insertions, 69 deletions

diff --git a/hugolib/orderedMap_test.go b/hugolib/orderedMap_test.go
deleted file mode 100644
index fc3d25080..000000000
--- a/hugolib/orderedMap_test.go
+++ /dev/null
@@ -1,69 +0,0 @@
-// Copyright 2018 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package hugolib
-
-import (
-	"fmt"
-	"sync"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-)
-
-func TestOrderedMap(t *testing.T) {
-	t.Parallel()
-	assert := require.New(t)
-
-	m := newOrderedMap()
-	m.Add("b", "vb")
-	m.Add("c", "vc")
-	m.Add("a", "va")
-	b, f1 := m.Get("b")
-
-	assert.True(f1)
-	assert.Equal(b, "vb")
-	assert.True(m.Contains("b"))
-	assert.False(m.Contains("e"))
-
-	assert.Equal([]interface{}{"b", "c", "a"}, m.Keys())
-
-}
-
-func TestOrderedMapConcurrent(t *testing.T) {
-	t.Parallel()
-	assert := require.New(t)
-
-	var wg sync.WaitGroup
-
-	m := newOrderedMap()
-
-	for i := 1; i < 20; i++ {
-		wg.Add(1)
-		go func(id int) {
-			defer wg.Done()
-			key := fmt.Sprintf("key%d", id)
-			val := key + "val"
-			m.Add(key, val)
-			v, found := m.Get(key)
-			assert.True(found)
-			assert.Equal(v, val)
-			assert.True(m.Contains(key))
-			assert.True(m.Len() > 0)
-			assert.True(len(m.Keys()) > 0)
-		}(i)
-
-	}
-
-	wg.Wait()
-}