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handle more messages from webui

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This commit is contained in:
deepak1556 2017-01-18 21:55:36 +05:30
parent a2db14476a
commit 41c1623824
2 changed files with 61 additions and 6 deletions
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56
atom/browser/ui/webui/pdf_viewer_handler.cc
View file

@ -9,6 +9,7 @@
#include "base/values.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/common/page_zoom.h"
namespace atom {
@ -23,8 +24,23 @@ void PdfViewerHandler::RegisterMessages() {
"initialize",
base::Bind(&PdfViewerHandler::Initialize, base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"getTabId",
base::Bind(&PdfViewerHandler::GetTabId, base::Unretained(this)));
"getDefaultZoom",
base::Bind(&PdfViewerHandler::GetInitialZoom, base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"getInitialZoom",
base::Bind(&PdfViewerHandler::GetInitialZoom, base::Unretained(this)));
}
void PdfViewerHandler::OnJavascriptAllowed() {
auto host_zoom_map =
content::HostZoomMap::GetForWebContents(web_ui()->GetWebContents());
host_zoom_map_subscription_ =
host_zoom_map->AddZoomLevelChangedCallback(base::Bind(
&PdfViewerHandler::OnZoomLevelChanged, base::Unretained(this)));
}
void PdfViewerHandler::OnJavascriptDisallowed() {
host_zoom_map_subscription_.reset();
}
void PdfViewerHandler::Initialize(const base::ListValue* args) {
@ -39,13 +55,45 @@ void PdfViewerHandler::Initialize(const base::ListValue* args) {
ResolveJavascriptCallback(*callback_id, *stream_info);
}
void PdfViewerHandler::GetTabId(const base::ListValue* args) {
void PdfViewerHandler::GetDefaultZoom(const base::ListValue* args) {
if (!IsJavascriptAllowed())
return;
CHECK_EQ(1U, args->GetSize());
const base::Value* callback_id;
CHECK(args->Get(0, &callback_id));
ResolveJavascriptCallback(*callback_id, base::FundamentalValue(-1));
auto host_zoom_map =
content::HostZoomMap::GetForWebContents(web_ui()->GetWebContents());
double zoom_level = host_zoom_map->GetDefaultZoomLevel();
ResolveJavascriptCallback(
*callback_id,
base::FundamentalValue(content::ZoomLevelToZoomFactor(zoom_level)));
}
void PdfViewerHandler::GetInitialZoom(const base::ListValue* args) {
if (!IsJavascriptAllowed())
return;
CHECK_EQ(1U, args->GetSize());
const base::Value* callback_id;
CHECK(args->Get(0, &callback_id));
double zoom_level =
content::HostZoomMap::GetZoomLevel(web_ui()->GetWebContents());
ResolveJavascriptCallback(
*callback_id,
base::FundamentalValue(content::ZoomLevelToZoomFactor(zoom_level)));
}
void PdfViewerHandler::OnZoomLevelChanged(
const content::HostZoomMap::ZoomLevelChange& change) {
// TODO(deepak1556): This will work only if zoom level is changed through host
// zoom map.
if (change.scheme == "chrome" && change.host == "pdf-viewer") {
CallJavascriptFunction(
"cr.webUIListenerCallback", base::StringValue("onZoomLevelChanged"),
base::FundamentalValue(
content::ZoomLevelToZoomFactor(change.zoom_level)));
}
}
} // namespace atom

11
atom/browser/ui/webui/pdf_viewer_handler.h
View file

@ -7,8 +7,8 @@
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "content/public/browser/host_zoom_map.h"
#include "content/public/browser/web_ui_message_handler.h"
namespace base {
@ -25,11 +25,18 @@ class PdfViewerHandler : public content::WebUIMessageHandler {
// WebUIMessageHandler implementation.
void RegisterMessages() override;
void OnJavascriptAllowed() override;
void OnJavascriptDisallowed() override;
private:
void Initialize(const base::ListValue* args);
void GetTabId(const base::ListValue* args);
void GetDefaultZoom(const base::ListValue* args);
void GetInitialZoom(const base::ListValue* args);
void OnZoomLevelChanged(const content::HostZoomMap::ZoomLevelChange& change);
// Keeps track of events related to zooming.
std::unique_ptr<content::HostZoomMap::Subscription>
host_zoom_map_subscription_;
std::string stream_url_;
std::string original_url_;