* src/client/composer/composer-link-popover.vala: New GtkPopover subclass
for creating/editing links.
* src/client/composer/composer-web-view.vala (EditContext): Add is_link
and link_uri properties, decode them from the message string, add
decoding tests.
(ComposerWebView): Add some as-yet un-implemented methods for
inserting/deleting links.
* src/client/composer/composer-widget.vala (ComposerWidget): Add
cursor_url for storing current text cursor link, update it from the
cursor_context_changed signal param, rename hover_url to pointer_url to
match. Add link_activated signal to let user's open links they are
adding, hook that up in the controller. Rename
::update_selection_actions to ::update_cursor_actions, since that's a
little more apt now, also enable insert link action if there is a
cursor_url set as well as a selection. Remove ::link_dialog, replace
with ::new_link_popover, hook up the new popover's signals there as
appropriate.
(ComposerWidget::on_insert_link): Create and show a lin popover instead
of a dialog.
* ui/composer-web-view.js: Take note of whther the context node is a link
and if so, also it's href. Include both when serialsing for the
cursorContextChanged message. Add serialisation tests.
* ui/composer-link-popover.ui: New UI for link popover.
Replace StylishWebView with ClientWebView, to act as a common base class
for the composer, conversation and other uses of web views.
Introduce a ComposerWebView that replaces WebviewEditFixer and extends
ClientWebView, and adds (dummy for now) methods for ComposerWidget to
call. Simiarly, make ConversationWebView extend ClientWebView, add dummy
calls to support the conversation viewer classes. Move common code from
both into ClientWebView.
Add a web-process library, unused other than for compile-time checking,
and move all client functions and methods involving DOM objects into util
classes there.
Bug 728002
