Hypertext: Fix various issues

* Change link color
* Return absolute URLs
* Provide link to tables (with anchor)
* Provide link to image when include_images=false
* Escape backward slashes
* Make package info more compact

app/tests/unit/utils/test_minetest_hypertext.py

@@ -70,9 +70,11 @@ You may leave a game and return to normal playing mode at anytime by typing:
 The Conquer GUI is the central place for monitoring your kingdom. Once in a session, you can view it by pressing the inventory key (I), or by punching/right-clicking the keep node.
 """
 
+page_url = "https://example.com/a/b/"
+
 
 def test_conquer():
-	assert html_to_minetest(conquer_html)["body"].strip() == conquer_expected.strip()
+	assert html_to_minetest(conquer_html, page_url)["body"].strip() == conquer_expected.strip()
 
 
 def test_images():
@@ -81,10 +83,40 @@ def test_images():
 	"""
 
 	expected = "<img name=image_0 width=128 height=128>"
-	result = html_to_minetest(html)
+	result = html_to_minetest(html, page_url)
 	assert result["body"].strip() == expected.strip()
 	assert len(result["images"]) == 1
-	assert result["images"]["image_0"] == "/path/to/img.png"
+	assert result["images"]["image_0"] == "https://example.com/path/to/img.png"
+
+
+def test_images_removed():
+	html = """
+		<img src="/path/to/img.png" alt="alt">
+	"""
+
+	expected = "<action name=image_0><u>Image: alt</u></action>"
+	result = html_to_minetest(html, page_url, 7, False)
+	assert result["body"].strip() == expected.strip()
+	assert len(result["images"]) == 0
+	assert result["links"]["image_0"] == "https://example.com/path/to/img.png"
+
+
+def test_links_relative_absolute():
+	html = """
+		<a href="relative">Relative</a>
+		<a href="/absolute">Absolute</a>
+		<a href="https://www.minetest.net/downloads/">Other domain</a>
+	"""
+
+	expected = "<action name=link_0><u>Relative</u></action> " \
+			"<action name=link_1><u>Absolute</u></action> " \
+			"<action name=link_2><u>Other domain</u></action>"
+
+	result = html_to_minetest(html, page_url, 7, False)
+	assert result["body"].strip() == expected.strip()
+	assert result["links"]["link_0"] == "https://example.com/a/b/relative"
+	assert result["links"]["link_1"] == "https://example.com/absolute"
+	assert result["links"]["link_2"] == "https://www.minetest.net/downloads/"
 
 
 def test_bullets():
@@ -102,15 +134,61 @@ def test_bullets():
 		"<img name=blank.png width=32 height=1>• sub two\n\n" \
 		"<img name=blank.png width=16 height=1>• four\n"
 
-	result = html_to_minetest(html)
+	result = html_to_minetest(html, page_url)
 	assert result["body"].strip() == expected.strip()
 
 
+def test_table():
+	html = """
+		<table id="with-id">
+			<tr><th>Col A</th><th>Col B</th><th>Col C</th></tr>
+			<tr><td>A1</td><td>B1</td><td>C1</td>
+			<tr><td>A2</td><td>B2</td><td>C2</td>
+			<tr><td>A3</td><td>B3</td><td>C3</td>
+		</table>
+		<h3 id="heading">Heading</h3> 
+		<table>
+			<tr><th>Col A</th><th>Col B</th><th>Col C</th></tr>
+			<tr><td>A1</td><td>B1</td><td>C1</td>
+			<tr><td>A2</td><td>B2</td><td>C2</td>
+			<tr><td>A3</td><td>B3</td><td>C3</td>
+		</table>
+	"""
+
+	expected = "<action name=link_0><u>(view table in browser)</u></action>\n\n" \
+			"<b>Heading</b>\n" \
+			"<action name=link_1><u>(view table in browser)</u></action>"
+	result = html_to_minetest(html, page_url)
+	assert result["body"].strip() == expected.strip()
+	assert result["links"]["link_0"] == f"{page_url}#with-id"
+	assert result["links"]["link_1"] == f"{page_url}#heading"
+
+
 def test_inline():
 	html = """
 		<b>One <i>two</i> three</b>
 	"""
 
 	expected = "<b>One <i>two</i> three</b>"
-	result = html_to_minetest(html)
+	result = html_to_minetest(html, page_url)
+	assert result["body"].strip() == expected.strip()
+
+
+def test_escape():
+	html = r"""
+		<b>One <i>t\w&lt;o&gt;</i> three</b>
+	"""
+
+	expected = r"<b>One <i>t\\w\<o\></i> three</b>"
+	result = html_to_minetest(html, page_url)
+	assert result["body"].strip() == expected.strip()
+
+
+def test_unknown_attr():
+	html = r"""
+		<a href="https://example.com" url="http://www.minetest.net">link</a>
+	"""
+
+	expected = r"<action name=link_0><u>link</u></action>"
+	result = html_to_minetest(html, page_url)
 	assert result["body"].strip() == expected.strip()