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Add print preview support (see issue #123)

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Pass the `--enable-print-preview` command-line flag to enable. Currently only
supported on Windows and Linux.
This commit is contained in:
Ananyo Maiti
2019-07-17 14:47:27 -04:00
committed by Marshall Greenblatt
parent cf87c88b05
commit 1669c0afbd
49 changed files with 1098 additions and 1425 deletions
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55
libcef/browser/browser_host_impl.cc
View File

@ -43,6 +43,7 @@
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "chrome/browser/printing/print_view_manager.h"
#include "chrome/browser/spellchecker/spellcheck_factory.h"
#include "chrome/browser/spellchecker/spellcheck_service.h"
#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
@ -769,11 +770,19 @@ void CefBrowserHostImpl::DownloadImage(
void CefBrowserHostImpl::Print() {
if (CEF_CURRENTLY_ON_UIT()) {
content::WebContents* actionable_contents = GetActionableWebContents();
auto actionable_contents = GetActionableWebContents();
if (!actionable_contents)
return;
printing::CefPrintViewManager::FromWebContents(actionable_contents)
->PrintNow(actionable_contents->GetRenderViewHost()->GetMainFrame());
auto rfh = actionable_contents->GetMainFrame();
if (IsPrintPreviewSupported()) {
printing::CefPrintViewManager::FromWebContents(actionable_contents)
->PrintPreviewNow(rfh, false);
} else {
printing::PrintViewManager::FromWebContents(actionable_contents)
->PrintNow(rfh);
}
} else {
CEF_POST_TASK(CEF_UIT, base::BindOnce(&CefBrowserHostImpl::Print, this));
}
@ -1480,6 +1489,22 @@ bool CefBrowserHostImpl::IsViewsHosted() const {
return is_views_hosted_;
}
bool CefBrowserHostImpl::IsPrintPreviewSupported() const {
CEF_REQUIRE_UIT();
auto actionable_contents = GetActionableWebContents();
if (!actionable_contents)
return false;
if (!CefBrowserContext::GetForContext(
actionable_contents->GetBrowserContext())
->IsPrintPreviewSupported()) {
return false;
}
// Print preview is not currently supported with OSR.
return !IsWindowless();
}
void CefBrowserHostImpl::WindowDestroyed() {
CEF_REQUIRE_UIT();
DCHECK(!window_destroyed_);
@ -1492,8 +1517,8 @@ void CefBrowserHostImpl::DestroyBrowser() {
destruction_state_ = DESTRUCTION_STATE_COMPLETED;
// Notify that this browser has been destroyed. These must be delivered in the
// expected order.
// Notify that this browser has been destroyed. These must be delivered in
// the expected order.
// 1. Notify the platform delegate. With Views this will result in a call to
// CefBrowserViewDelegate::OnBrowserDestroyed().
@ -1559,7 +1584,7 @@ CefRefPtr<CefBrowserView> CefBrowserHostImpl::GetBrowserView() const {
return platform_delegate_->GetBrowserView();
return nullptr;
}
#endif // defined(USE_AURA)
#endif
void CefBrowserHostImpl::CancelContextMenu() {
CEF_REQUIRE_UIT();
@ -1688,8 +1713,8 @@ content::BrowserContext* CefBrowserHostImpl::GetBrowserContext() {
void CefBrowserHostImpl::OnSetFocus(cef_focus_source_t source) {
if (CEF_CURRENTLY_ON_UIT()) {
// SetFocus() might be called while inside the OnSetFocus() callback. If so,
// don't re-enter the callback.
// SetFocus() might be called while inside the OnSetFocus() callback. If
// so, don't re-enter the callback.
if (!is_in_onsetfocus_) {
if (client_.get()) {
CefRefPtr<CefFocusHandler> handler = client_->GetFocusHandler();
@ -1720,8 +1745,8 @@ void CefBrowserHostImpl::RunFileChooser(
}
bool CefBrowserHostImpl::EmbedsFullscreenWidget() const {
// When using windowless rendering do not allow Flash to create its own full-
// screen widget.
// When using windowless rendering do not allow Flash to create its own
// full- screen widget.
return IsWindowless();
}
@ -2071,8 +2096,8 @@ void CefBrowserHostImpl::LoadingStateChanged(content::WebContents* source,
{
base::AutoLock lock_scope(state_lock_);
// This method may be called multiple times in a row with |is_loading| true
// as a result of https://crrev.com/5e750ad0. Ignore the 2nd+ times.
// This method may be called multiple times in a row with |is_loading|
// true as a result of https://crrev.com/5e750ad0. Ignore the 2nd+ times.
if (is_loading_ == is_loading && can_go_back_ == can_go_back &&
can_go_forward_ == can_go_forward) {
return;
@ -2212,7 +2237,7 @@ bool CefBrowserHostImpl::HandleContextMenu(
return HandleContextMenu(web_contents(), params);
}
content::WebContents* CefBrowserHostImpl::GetActionableWebContents() {
content::WebContents* CefBrowserHostImpl::GetActionableWebContents() const {
if (web_contents() && extensions::ExtensionsEnabled()) {
content::WebContents* guest_contents =
extensions::GetFullPageGuestForOwnerContents(web_contents());
@ -2865,8 +2890,8 @@ CefBrowserHostImpl::CefBrowserHostImpl(
// When navigating through the history, the restored NavigationEntry's title
// will be used. If the entry ends up having the same title after we return
// to it, as will usually be the case, the
// NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED will then be suppressed, since the
// NavigationEntry's title hasn't changed.
// NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED will then be suppressed, since
// the NavigationEntry's title hasn't changed.
registrar_->Add(this, content::NOTIFICATION_LOAD_STOP,
content::Source<content::NavigationController>(
&web_contents->GetController()));