Edit: To be clear, I'm not saying this to rag on CodeMirror. It's a marvel that they got it working as well as it does, and it's been around for a long time- po

Edit: To be clear, I'm not saying this to rag on CodeMirror. It's a marvel that they got it working as well as it does, and it's been around for a long time- possibly longer than the canvas API has been widely available. It's just that doing things this way requires a pile of hacks and I can see a strong argument for just cutting out the middle-man and doing 100% custom rendering.