webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 138 insertions, 0 deletions

diff --git a/Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorTextKillController.js b/Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorTextKillController.js
new file mode 100644
index 000000000..8cd0b7300
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Controllers/CodeMirrorTextKillController.js
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WebInspector.CodeMirrorTextKillController = class CodeMirrorTextKillController extends WebInspector.Object
+{
+    constructor(codeMirror)
+    {
+        super();
+
+        console.assert(codeMirror);
+
+        this._codeMirror = codeMirror;
+        this._expectingChangeEventForKill = false;
+        this._nextKillStartsNewSequence = true;
+        this._shouldPrependToKillRing = false;
+
+        this._handleTextChangeListener = this._handleTextChange.bind(this);
+        this._handleEditorBlurListener = this._handleEditorBlur.bind(this);
+        this._handleSelectionOrCaretChangeListener = this._handleSelectionOrCaretChange.bind(this);
+
+        // FIXME: these keybindings match CodeMirror's default keymap for OS X.
+        // They should probably be altered for Windows / Linux someday.
+        this._codeMirror.addKeyMap({
+            // Overrides for the 'emacsy' keymap.
+            "Ctrl-K": this._handleTextKillCommand.bind(this, "killLine", false),
+            "Alt-D": this._handleTextKillCommand.bind(this, "delWordAfter", false),
+            // Overrides for the 'macDefault' keymap.
+            "Alt-Delete": this._handleTextKillCommand.bind(this, "delGroupAfter", false),
+            "Cmd-Backspace": this._handleTextKillCommand.bind(this, "delWrappedLineLeft", true),
+            "Cmd-Delete": this._handleTextKillCommand.bind(this, "delWrappedLineRight", false),
+            "Alt-Backspace": this._handleTextKillCommand.bind(this, "delGroupBefore", true),
+            "Ctrl-Alt-Backspace": this._handleTextKillCommand.bind(this, "delGroupAfter", false),
+        });
+    }
+
+    _handleTextKillCommand(command, prependsToKillRing, codeMirror)
+    {
+        // Read-only mode is dynamic in some editors, so check every time
+        // and ignore the shortcut if in read-only mode.
+        if (this._codeMirror.getOption("readOnly"))
+            return;
+
+        this._shouldPrependToKillRing = prependsToKillRing;
+
+        // Don't add the listener if it's still registered because
+        // a previous empty kill didn't generate change events.
+        if (!this._expectingChangeEventForKill)
+            this._codeMirror.on("changes", this._handleTextChangeListener);
+
+        this._expectingChangeEventForKill = true;
+        this._codeMirror.execCommand(command);
+    }
+
+    _handleTextChange(codeMirror, changes)
+    {
+        this._codeMirror.off("changes", this._handleTextChangeListener);
+
+        // Sometimes a second change event fires after removing the listener
+        // if you perform an "empty kill" and type after moving the caret.
+        if (!this._expectingChangeEventForKill)
+            return;
+
+        this._expectingChangeEventForKill = false;
+
+        // It doesn't make sense to get more than one change per kill.
+        console.assert(changes.length === 1);
+        let change = changes[0];
+
+        // If an "empty kill" is followed by up/down or typing,
+        // the empty kill won't fire a change event, then we'll get an
+        // unrelated change event that shouldn't be treated as a kill.
+        if (change.origin !== "+delete")
+            return;
+
+        // When killed text includes a newline, CodeMirror returns
+        // strange change objects. Special-case for when this could happen.
+        let killedText;
+        if (change.to.line === change.from.line + 1 && change.removed.length === 2) {
+            // An entire line was deleted, including newline (deleteLine).
+            if (change.removed[0].length && !change.removed[1].length)
+                killedText = change.removed[0] + "\n";
+            // A newline was killed by itself (Ctrl-K).
+            else
+                killedText = "\n";
+        } else {
+            console.assert(change.removed.length === 1);
+            killedText = change.removed[0];
+        }
+
+        InspectorFrontendHost.killText(killedText, this._shouldPrependToKillRing, this._nextKillStartsNewSequence);
+
+        // If the editor loses focus or the caret / selection changes
+        // (not as a result of the kill), then the next kill should
+        // start a new kill ring sequence.
+        this._nextKillStartsNewSequence = false;
+        this._codeMirror.on("blur", this._handleEditorBlurListener);
+        this._codeMirror.on("cursorActivity", this._handleSelectionOrCaretChangeListener);
+    }
+
+    _handleEditorBlur(codeMirror)
+    {
+        this._nextKillStartsNewSequence = true;
+        this._codeMirror.off("blur", this._handleEditorBlurListener);
+        this._codeMirror.off("cursorActivity", this._handleSelectionOrCaretChangeListener);
+    }
+
+    _handleSelectionOrCaretChange(codeMirror)
+    {
+        if (this._expectingChangeEventForKill)
+            return;
+
+        this._nextKillStartsNewSequence = true;
+        this._codeMirror.off("blur", this._handleEditorBlurListener);
+        this._codeMirror.off("cursorActivity", this._handleSelectionOrCaretChangeListener);
+    }
+};