chore: add helper method for finding all ranges of pattern in a string

Author: MeanderingProgrammer

lua/render-markdown/health.lua

@@ -5,7 +5,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '7.8.15'
+M.version = '7.8.16'
 
 function M.check()
     M.start('version')

lua/render-markdown/lib/str.lua

@@ -39,4 +39,23 @@ function M.pad_to(target, s)
     return M.pad(M.width(target) - M.width(s))
 end
 
+---@param s string
+---@param pattern string
+---@return Range2[]
+function M.find_all(s, pattern)
+    local result = {}
+    ---@type integer?
+    local index = 1
+    while index ~= nil do
+        local start_index, end_index = s:find(pattern, index)
+        if start_index == nil or end_index == nil then
+            index = nil
+        else
+            table.insert(result, { start_index, end_index })
+            index = end_index + 1
+        end
+    end
+    return result
+end
+
 return M

lua/render-markdown/render/inline_highlight.lua

@@ -16,27 +16,19 @@ function Render:setup()
 end
 
 function Render:render()
-    ---@type integer|nil
-    local index = 1
-    while index ~= nil do
-        local start_index, end_index = self.node.text:find('==[^=]+==', index)
-        if start_index == nil or end_index == nil then
-            index = nil
-        else
-            local start_row, start_col = self:row_col(start_index, 1)
-            local end_row, end_col = self:row_col(end_index, 0)
-            -- Hide first 2 equal signs
-            self:hide_equals(start_row, start_col)
-            -- Highlight contents
-            self.marks:add(false, start_row, start_col, {
-                end_row = end_row,
-                end_col = end_col,
-                hl_group = self.highlight.highlight,
-            })
-            -- Hide last 2 equal signs
-            self:hide_equals(end_row, end_col - 2)
-            index = end_index + 1
-        end
+    for _, range in ipairs(Str.find_all(self.node.text, '==[^=]+==')) do
+        local start_row, start_col = self:row_col(range[1], 1)
+        local end_row, end_col = self:row_col(range[2], 0)
+        -- Hide first 2 equal signs
+        self:hide_equals(start_row, start_col)
+        -- Highlight contents
+        self.marks:add(false, start_row, start_col, {
+            end_row = end_row,
+            end_col = end_col,
+            hl_group = self.highlight.highlight,
+        })
+        -- Hide last 2 equal signs
+        self:hide_equals(end_row, end_col - 2)
     end
 end