diff options
author | Jon Bergli Heier <snakebite@jvnv.net> | 2010-01-25 01:00:18 +0100 |
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committer | Jon Bergli Heier <snakebite@jvnv.net> | 2010-01-25 01:00:18 +0100 |
commit | 346b22ddf795f9a5a10ddc6b83bfa3bc15c8d30a (patch) | |
tree | f9d9251ea08bc8ad57e7234ca451bcc3eeccc7b5 /static/edit.js |
Initial commit.
Diffstat (limited to 'static/edit.js')
-rw-r--r-- | static/edit.js | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/static/edit.js b/static/edit.js new file mode 100644 index 0000000..8e754d8 --- /dev/null +++ b/static/edit.js @@ -0,0 +1,83 @@ +function tab_add(t, ti, ss, se) { + t.value = t.value.substr(0, ti) + "\t" + t.value.substr(ti); + t.selectionStart = ss + 1; + t.selectionEnd = se + 1; +} + +function tab_remove(t, ti, ss, se) { + t.value = t.value.substr(0, ti-1) + t.value.substr(ti); + t.selectionStart = ss - 1; + t.selectionEnd = se - 1; +} + +function textarea_handle_tab(t, e) { + if(navigator.userAgent.match("Gecko")) { + keyCode = e.which; + } else { + keyCode = e.keyCode; + } + if(keyCode != 9) + return; + e.preventDefault(); + var ss = t.selectionStart; + var se = t.selectionEnd; + if(ss == se) { + if(e.shiftKey) { + if(t.value[ss-1] == "\t") { + tab_remove(t, ss, ss, se); + } + } else { + tab_add(t, ss, ss, se); + } + } else { + var s; + if(ss < se) + s = t.value.substr(ss, se - ss); + else + s = t.value.substr(se, ss - se); + if(s.indexOf("\n") > -1) { + var nl = s.lastIndexOf("\n"); + if(e.shiftKey) { + while(nl > -1) { + if(s[nl+1] == "\t") { + tab_remove(t, ss + nl + 2, ss, se); + se--; + } + nl = s.lastIndexOf("\n", nl - 2); + } + if(t.value[(ss < se ? ss : se)-1] == "\n" && e.shiftKey) + tab_remove(t, ss+1, ss, se); + if((ss == 0 || se == 0) && t.value[0] == "\t") + tab_remove(t, 1, ss, se); + } else { + while(nl > -1) { + tab_add(t, ss + nl + 1, ss, se); + se++; + if(nl == 0) + break; + nl = s.lastIndexOf("\n", nl - 2); + } + if(ss == 0 || se == 0 || t.value[(ss < se ? ss : se)-1] == "\n") + tab_add(t, ss, ss-1, se); + } + + } else { + var nl = t.value.lastIndexOf("\n", (ss < se ? se : ss) - 1) + 1; + if(e.shiftKey) { + if(t.value[nl] == "\t") { + tab_remove(t, nl + 1, ss, se); + } + } else { + tab_add(t, nl, ss, se); + } + } + } + setTimeout("document.getElementById('" + t.id + "').focus();", 0); +} + +window.onload = function() { + text = document.getElementById("text"); + text.onkeydown = function(event) { + return textarea_handle_tab(text, event); + } +} |