From 6ad9e7992661c594959293e7ab7c533150d32814 Mon Sep 17 00:00:00 2001
From: Mathieu PATUREL <australie.p@gmail.com>
Date: Wed, 4 Jan 2017 12:24:05 +1100
Subject: [PATCH] preview markdown working

---
 MLPApi.py              | 59 ++++++++++++++++++++++++++++++++++++++++++
 MarkdownLivePreview.py |  9 +++++--
 default.css            | 43 ++++++++++++++++++++++++++++++
 devListener.py         |  1 +
 functions.py           | 42 ++++++++++++++++++++++++++++++
 sample.md              |  2 ++
 6 files changed, 154 insertions(+), 2 deletions(-)
 create mode 100644 default.css

diff --git a/MLPApi.py b/MLPApi.py
index 2686ac6..5fc86bd 100644
--- a/MLPApi.py
+++ b/MLPApi.py
@@ -3,9 +3,20 @@
 import sublime
 import sublime_plugin
 
+import os.path
+from html.parser import HTMLParser
+
+from .lib import markdown2
+from .escape_amp import *
 from .functions import *
 from .setting_names import *
 
+__folder__ = os.path.dirname(__file__)
+
+STYLE_FILE = os.path.join(os.path.dirname(__folder__), 'User',
+                                          'MarkdownLivePreview.css')
+DEFAULT_STYLE_FILE = os.path.join(__folder__, 'default.css')
+
 def get_preview_name(md_view):
     name = md_view.name() \
            or os.path.basename(md_view.file_name()) \
@@ -40,3 +51,51 @@ def hide_preview(md_view):
     psettings = preview.settings()
     psettings.set(IS_HIDDEN, True)
     sublime.set_timeout(preview.close(), 250)
+
+def get_style():
+    if os.path.exists(STYLE_FILE):
+        with open(STYLE_FILE) as fp:
+            return fp.read()
+
+    with open(DEFAULT_STYLE_FILE) as fp:
+        content = fp.read()
+    content = ''.join([line.strip() for line in content.splitlines()])
+    return content + "pre code .space {color: var(--light-bg)}"
+
+def show_html(md_view, preview):
+    html = '<style>{}</style>\n{}'.format(get_style(),
+            pre_with_br(markdown2.markdown(get_view_content(md_view),
+                                           extras=['fenced-code-blocks',
+                                                   'no-code-highlighting'])))
+
+    # the option no-code-highlighting does not exists
+    # in the official version of markdown2 for now
+    # I personaly edited the file (markdown2.py:1743)
+
+    html = html.replace('&nbsp;', '&nbspespace;') # save where are the spaces
+
+    html = HTMLParser().unescape(html)
+
+    html = escape_amp(html)
+
+    # exception, again, because <pre> aren't supported by the phantoms
+    html = html.replace('&nbspespace;', '<i class="space">.</i>')
+    html = replace_img_src_base64(html)
+    preview.erase_phantoms('markdown_preview')
+    preview.add_phantom('markdown_preview',
+                         sublime.Region(-1),
+                         html,
+                         sublime.LAYOUT_BLOCK,
+                         lambda href: sublime.run_command('open_url',
+                                                          {'url': href}))
+
+    # set viewport position
+
+    # 0 < y < 1
+    y = md_view.text_to_layout(md_view.sel()[0].begin())[1] / md_view.layout_extent()[1]
+    vector = [0, y * preview.layout_extent()[1]]
+    # remove half of the viewport_extent.y to center it on the screen (verticaly)
+    vector[1] -= preview.viewport_extent()[1] / 2
+    vector[1] = mini(vector[1], 0)
+    vector[1] += preview.line_height()
+    preview.set_viewport_position(vector, animate=False)
diff --git a/MarkdownLivePreview.py b/MarkdownLivePreview.py
index 95030c2..a31c159 100644
--- a/MarkdownLivePreview.py
+++ b/MarkdownLivePreview.py
@@ -27,12 +27,17 @@ class MarkdownLivePreviewListener(sublime_plugin.EventListener):
         md_view_settings = md_view.settings()
         if md_view_settings.get(PREVIEW_ENABLED) is not True:
             return
-
-        if not md_view_settings.get(PREVIEW_ID):
+        id = md_view_settings.get(PREVIEW_ID)
+        if not id:
             MarkdownLivePreviewListener.md_view = md_view
             create_preview(md_view)
             MarkdownLivePreviewListener.has_preview = True
             window.focus_view(md_view)
+        else:
+            preview = get_view_from_id(window, id)
+            if preview is None:
+                raise ValueError('Getting preview from id: got None')
+            show_html(md_view, preview)
 
     def on_pre_close(self, view):
         vsettings = view.settings()
diff --git a/default.css b/default.css
new file mode 100644
index 0000000..66e1301
--- /dev/null
+++ b/default.css
@@ -0,0 +1,43 @@
+:root, html, body {
+    height: 100%;
+}
+html {
+    --light-bg: color(var(--background) blend(#999 85%))
+    height: 100%;
+}
+body {
+    padding:10px;
+    padding-top: 0px;
+    font-family: "Open Sans", sans-serif;
+    background-color: var(--background);
+    font-size: 15px;
+}
+
+blockquote {
+    font-style: italic;
+    display: block;
+    margin-left: 30px;
+    border: 1px solid red;
+}
+
+code {
+    padding-left: 0.2rem;
+    padding-right: 0.2rem;
+    background-color: var(--light-bg);
+    margin: 0;
+    border-radius: 3px;
+    margin: 5px;
+}
+
+pre {
+    display: block;
+    margin-top: 20px;
+    line-height: 1.7;
+    background-color: var(--light-bg);
+    padding-left: 10px;
+    width: 100%;
+    border-radius: 3px;
+}
+pre code {
+    padding-left: 0;
+}
diff --git a/devListener.py b/devListener.py
index e48f398..3c30ac7 100644
--- a/devListener.py
+++ b/devListener.py
@@ -7,6 +7,7 @@ import os.path
 class MLPDevListener(sublime_plugin.EventListener):
 
     def on_post_save(self, view):
+        return
         if not (os.path.dirname(__file__) in view.file_name() and
             view.file_name().endswith('.py')):
             return
diff --git a/functions.py b/functions.py
index 17d5985..9c85816 100644
--- a/functions.py
+++ b/functions.py
@@ -2,9 +2,36 @@
 import base64
 import os.path
 import sublime
+import re
+from .image_manager import ImageManager
 
 file404 = os.path.join(os.path.dirname(__file__), '404.png')
 
+
+def replace_img_src_base64(html):
+    """Really messy, but it works (should be updated)"""
+    index = -1
+    tag_start = '<img src="'
+    shtml, html = html, list(html)
+    while True:
+        index = shtml.find(tag_start, index + 1)
+        if index == -1:
+            break
+        path, end = get_content_till(html, '"', start=index + len(tag_start))
+        if ''.join(path).startswith('data:image/'):
+            continue
+        if ''.join(path).startswith(tuple(get_settings().get('load_from_internet'
+                                                    '_when_starts'))):
+            image = ImageManager.get(''.join(path))
+            image = image or to_base64('loading.png')
+
+        else:
+            # local image
+            image = to_base64(''.join(path))
+        html[index+len(tag_start):end] = image
+        shtml = ''.join(html)
+    return ''.join(html)
+
 def is_markdown_view(view):
         return 'markdown' in view.scope_name(0)
 
@@ -51,3 +78,18 @@ def get_view_from_id(window, id):
 
 def get_settings():
     return sublime.load_settings('MarkdownLivePreview.sublime-settings')
+
+def pre_with_br(html):
+    """Because the phantoms of sublime text does not support <pre> blocks
+    this function replaces every \n with a <br> in a <pre>"""
+
+    while True:
+        obj = re.search(r'<pre>(.*?)</pre>', html, re.DOTALL)
+        if not obj:
+            break
+        html = list(html)
+        html[obj.start(0):obj.end(0)] = '<pre >' + ''.join(html[obj.start(1):obj.end(1)]) \
+                                            .replace('\n', '<br>') \
+                                            .replace(' ', '&nbsp;') + '</pre>'
+        html = ''.join(html)
+    return html
diff --git a/sample.md b/sample.md
index 85aa213..3251cc7 100644
--- a/sample.md
+++ b/sample.md
@@ -3,3 +3,5 @@
 ![image](http://afterishtar.pl/images/100x100.gif)
 
 this is a test
+
+hello world...
\ No newline at end of file