upstream/ipython Files · IPython/frontend/html/notebook/static/codemirror/lib/codemirror.css

Backport PR : inputhook_qt4: Use QEventLoop instead of starting up the QCoreApplication...

Backport PR : inputhook_qt4: Use QEventLoop instead of starting up the QCoreApplication I referenced this branch in and was letting it sit for a little while, but I have decided to make it a full pull request to get some additional visibility. Essentially our Qt event loop mechanism repeatedly starts and quits a `QCoreApplication` object. Unfortunately the `QCoreApplication::quit` slot has a lot of unintended side effects (like emitting an `aboutToQuit` signal which closes all open file dialogs). For our input hook, we _might_ be able to get by with just using a `QEventLoop` whose quit slot is much simpler and less destructive. For a little bit of background on why one might want to just use `QEventLoop::exec`, let's examine what `QCoreApplication::exec` does: ```c++ int QCoreApplication::exec() { if (!QCoreApplicationPrivate::checkInstance("exec")) return -1; // ... [some assertions] threadData->quitNow = false; QEventLoop eventLoop; self->d_func()->in_exec = true; self->d_func()->aboutToQuitEmitted = false; int returnCode = eventLoop.exec(); threadData->quitNow = false; if (self) { self->d_func()->in_exec = false; if (!self->d_func()->aboutToQuitEmitted) emit self->aboutToQuit(); self->d_func()->aboutToQuitEmitted = true; sendPostedEvents(0, QEvent::DeferredDelete); } return returnCode; } ``` As far as I can tell, it's a small wrapper around `QEventLoop::exec` which also: * Sets some variables regarding the current status * Emits an `aboutToQuit` signal right before the function returns (which is the root cause of @denisri's problem in ). Historically, our Qt event loop is a python implementation of the (win 32) input hook supplied with the PyQt4 source (see qtcore_input_hook` in `python-qt4/sip/QtCore/qcoreapplication.sip`), which more or less dates to a [mailing list post](http://www.riverbankcomputing.com/pipermail/pyqt/2007-July/016512.html) from July 2007.

Brian Granger - - Load All Authors

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      .CodeMirror {

        line-height: 1em;

        font-family: monospace;

      }

      .CodeMirror-scroll {

        overflow: auto;

        height: 300px;

        /* This is needed to prevent an IE[67] bug where the scrolled content

           is visible outside of the scrolling box. */

        position: relative;

      }

      .CodeMirror-gutter {

        position: absolute; left: 0; top: 0;

        z-index: 10;

        background-color: #f7f7f7;

        border-right: 1px solid #eee;

        min-width: 2em;

        height: 100%;

      }

      .CodeMirror-gutter-text {

        color: #aaa;

        text-align: right;

        padding: .4em .2em .4em .4em;

        white-space: pre !important;

      }

      .CodeMirror-lines {

        padding: .4em;

      }

      .CodeMirror pre {

        -moz-border-radius: 0;

        -webkit-border-radius: 0;

        -o-border-radius: 0;

        border-radius: 0;

        border-width: 0; margin: 0; padding: 0; background: transparent;

        font-family: inherit;

        font-size: inherit;

        padding: 0; margin: 0;

        white-space: pre;

        word-wrap: normal;

      }

      .CodeMirror-wrap pre {

        word-wrap: break-word;

        white-space: pre-wrap;

      }

      .CodeMirror-wrap .CodeMirror-scroll {

        overflow-x: hidden;

      }

      .CodeMirror textarea {

        outline: none !important;

      }

      .CodeMirror pre.CodeMirror-cursor {

        z-index: 10;

        position: absolute;

        visibility: hidden;

        border-left: 1px solid black;

      }

      .CodeMirror-focused pre.CodeMirror-cursor {

        visibility: visible;

      }

      div.CodeMirror-selected { background: #d9d9d9; }

      .CodeMirror-focused div.CodeMirror-selected { background: #d7d4f0; }

      .CodeMirror-searching {

        background: #ffa;

        background: rgba(255, 255, 0, .4);

      }

      /* Default theme */

      .cm-s-default span.cm-keyword {color: #708;}

      .cm-s-default span.cm-atom {color: #219;}

      .cm-s-default span.cm-number {color: #164;}

      .cm-s-default span.cm-def {color: #00f;}

      .cm-s-default span.cm-variable {color: black;}

      .cm-s-default span.cm-variable-2 {color: #05a;}

      .cm-s-default span.cm-variable-3 {color: #085;}

      .cm-s-default span.cm-property {color: black;}

      .cm-s-default span.cm-operator {color: black;}

      .cm-s-default span.cm-comment {color: #a50;}

      .cm-s-default span.cm-string {color: #a11;}

      .cm-s-default span.cm-string-2 {color: #f50;}

      .cm-s-default span.cm-meta {color: #555;}

      .cm-s-default span.cm-error {color: #f00;}

      .cm-s-default span.cm-qualifier {color: #555;}

      .cm-s-default span.cm-builtin {color: #30a;}

      .cm-s-default span.cm-bracket {color: #cc7;}

      .cm-s-default span.cm-tag {color: #170;}

      .cm-s-default span.cm-attribute {color: #00c;}

      .cm-s-default span.cm-header {color: #a0a;}

      .cm-s-default span.cm-quote {color: #090;}

      .cm-s-default span.cm-hr {color: #999;}

      .cm-s-default span.cm-link {color: #00c;}

      span.cm-header, span.cm-strong {font-weight: bold;}

      span.cm-em {font-style: italic;}

      span.cm-emstrong {font-style: italic; font-weight: bold;}

      span.cm-link {text-decoration: underline;}

      div.CodeMirror span.CodeMirror-matchingbracket {color: #0f0;}

      div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #f22;}

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				.CodeMirror {
				line-height: 1em;
				font-family: monospace;
				}

				.CodeMirror-scroll {
				overflow: auto;
				height: 300px;
				/* This is needed to prevent an IE[67] bug where the scrolled content
				is visible outside of the scrolling box. */
				position: relative;
				}

				.CodeMirror-gutter {
				position: absolute; left: 0; top: 0;
				z-index: 10;
				background-color: #f7f7f7;
				border-right: 1px solid #eee;
				min-width: 2em;
				height: 100%;
				}
				.CodeMirror-gutter-text {
				color: #aaa;
				text-align: right;
				padding: .4em .2em .4em .4em;
				white-space: pre !important;
				}
				.CodeMirror-lines {
				padding: .4em;
				}

				.CodeMirror pre {
				-moz-border-radius: 0;
				-webkit-border-radius: 0;
				-o-border-radius: 0;
				border-radius: 0;
				border-width: 0; margin: 0; padding: 0; background: transparent;
				font-family: inherit;
				font-size: inherit;
				padding: 0; margin: 0;
				white-space: pre;
				word-wrap: normal;
				}

				.CodeMirror-wrap pre {
				word-wrap: break-word;
				white-space: pre-wrap;
				}
				.CodeMirror-wrap .CodeMirror-scroll {
				overflow-x: hidden;
				}

				.CodeMirror textarea {
				outline: none !important;
				}

				.CodeMirror pre.CodeMirror-cursor {
				z-index: 10;
				position: absolute;
				visibility: hidden;
				border-left: 1px solid black;
				}
				.CodeMirror-focused pre.CodeMirror-cursor {
				visibility: visible;
				}

				div.CodeMirror-selected { background: #d9d9d9; }
				.CodeMirror-focused div.CodeMirror-selected { background: #d7d4f0; }

				.CodeMirror-searching {
				background: #ffa;
				background: rgba(255, 255, 0, .4);
				}

				/* Default theme */

				.cm-s-default span.cm-keyword {color: #708;}
				.cm-s-default span.cm-atom {color: #219;}
				.cm-s-default span.cm-number {color: #164;}
				.cm-s-default span.cm-def {color: #00f;}
				.cm-s-default span.cm-variable {color: black;}
				.cm-s-default span.cm-variable-2 {color: #05a;}
				.cm-s-default span.cm-variable-3 {color: #085;}
				.cm-s-default span.cm-property {color: black;}
				.cm-s-default span.cm-operator {color: black;}
				.cm-s-default span.cm-comment {color: #a50;}
				.cm-s-default span.cm-string {color: #a11;}
				.cm-s-default span.cm-string-2 {color: #f50;}
				.cm-s-default span.cm-meta {color: #555;}
				.cm-s-default span.cm-error {color: #f00;}
				.cm-s-default span.cm-qualifier {color: #555;}
				.cm-s-default span.cm-builtin {color: #30a;}
				.cm-s-default span.cm-bracket {color: #cc7;}
				.cm-s-default span.cm-tag {color: #170;}
				.cm-s-default span.cm-attribute {color: #00c;}
				.cm-s-default span.cm-header {color: #a0a;}
				.cm-s-default span.cm-quote {color: #090;}
				.cm-s-default span.cm-hr {color: #999;}
				.cm-s-default span.cm-link {color: #00c;}

				span.cm-header, span.cm-strong {font-weight: bold;}
				span.cm-em {font-style: italic;}
				span.cm-emstrong {font-style: italic; font-weight: bold;}
				span.cm-link {text-decoration: underline;}

				div.CodeMirror span.CodeMirror-matchingbracket {color: #0f0;}
				div.CodeMirror span.CodeMirror-nonmatchingbracket {color: #f22;}