feat(renderer)!: Added support for simple html elements

NOTE: You will now need the `html` parser for the plugin to work.

Tags like <u>, <i> will now be concealed and an appropriate highlight
group will be used instead.

Added html elements & email support to tables.

WARNING: Due to limitations of lua only single tags work as intended
inside tables.

ftplugin/markdown.lua

@@ -3,19 +3,21 @@ local utils = require("markview.utils");
 
 local ts_available, treesitter_parsers = pcall(require, "nvim-treesitter.parsers");
 local function parser_installed(parser)
-	return (ts_available and treesitter_parsers.has_parser(parser)) or
-		(vim.treesitter.query.get(parser, "highlights"))
+	return (ts_available and treesitter_parsers.has_parser(parser)) or pcall(vim.treesitter.query.get, parser, "highlights")
 end
 
 -- Check for requirements
 if vim.fn.has("nvim-0.10") == 0 then
-	warn("[ markview.nvim ] : Thie plugin is only available on version 0.10.0 and higher!");
+	vim.notify("[ markview.nvim ] : Thie plugin is only available on version 0.10.0 and higher!", vim.log.levels.WARN);
 	return;
 elseif not parser_installed("markdown") then
-	warn("[ markview.nvim ] : Treesitter parser for 'markdown' wasn't found!");
+	vim.notify("[ markview.nvim ] : Treesitter parser for 'markdown' wasn't found!", vim.log.levels.WARN);
 	return;
 elseif not parser_installed("markdown_inline") then
-	warn("[ markview.nvim ] : Treesitter parser for 'markdown_inline' wasn't found!");
+	vim.notify("[ markview.nvim ] : Treesitter parser for 'markdown_inline' wasn't found!", vim.log.levels.WARN);
+	return;
+elseif not parser_installed("html") then
+	vim.notify("[ markview.nvim ] : Treesitter parser for 'html' wasn't found! It is required for basic html tag support.", vim.log.levels.WARN);
 	return;
 end
 

lua/markview.lua

@@ -1164,6 +1164,17 @@ markview.configuration = {
 			}
 		}
 	},
+	html = {
+		default = {
+			conceal = false
+		},
+
+		types = {
+			p = { conceal = true, hl = "Title" },
+			u = { conceal = true, hl = "Underlined" },
+			i = { conceal = true, hl = "Italic" }
+		}
+	},
 
 	links = {
 		enable = true,

lua/markview/parser.lua

@@ -518,6 +518,52 @@ parser.md_inline = function (buffer, TStree, from, to)
 	end
 end
 
+parser.html = function (buffer, TStree, from, to)
+	local scanned_queies = vim.treesitter.query.parse("html", [[
+		((element) @elem)
+
+		;((entity_reference) @entity)
+	]]);
+
+	for capture_id, capture_node, _, _ in scanned_queies:iter_captures(TStree:root(), buffer, from, to) do
+		local capture_name = scanned_queies.captures[capture_id];
+		local capture_text = vim.treesitter.get_node_text(capture_node, buffer);
+		local row_start, col_start, row_end, col_end = capture_node:range();
+
+		if capture_name == "elem" then
+			local node_childs = capture_node:named_child_count();
+
+			local start_tag = capture_node:named_child(0);
+			local end_tag = capture_node:named_child(node_childs - 1);
+
+			if start_tag:type() == "start_tag" and end_tag:type() == "end_tag" and row_start == row_end then
+				local _, ts_col_start, _, ts_col_end = start_tag:range();
+				local _, te_col_start, _, te_col_end = end_tag:range();
+
+				table.insert(parser.parsed_content, {
+					node = capture_node,
+					type = "html_inline",
+
+					tag = vim.treesitter.get_node_text(start_tag, buffer):gsub("[</>]", ""):match("%a+"),
+					text = capture_text,
+
+					start_tag_col_start = ts_col_start,
+					start_tag_col_end = ts_col_end,
+
+					end_tag_col_start = te_col_start,
+					end_tag_col_end = te_col_end,
+
+					row_start = row_start,
+					row_end = row_end,
+
+					col_start = col_start,
+					col_end = col_end
+				})
+			end
+		end
+	end
+end
+
 --- Initializes the parsers on the specified buffer
 --- Parsed data is stored as a "view" in renderer.lua
 ---
@@ -541,6 +587,8 @@ parser.init = function (buffer, config_table)
 			parser.md(buffer, TStree)
 		elseif tree_language == "markdown_inline" then
 			parser.md_inline(buffer, TStree);
+		elseif tree_language == "html" then
+			parser.html(buffer, TStree);
 		end
 	end)
 
@@ -566,6 +614,8 @@ parser.parse_range = function (buffer, config_table, from, to)
 			parser.md(buffer, TStree, from, to)
 		elseif tree_language == "markdown_inline" then
 			parser.md_inline(buffer, TStree, from, to);
+		elseif tree_language == "html" then
+			parser.html(buffer, TStree, from, to);
 		end
 	end)